uhd: replace all the instances of float not pertaining to io types with double, simplifies life

38 files changed, 242 insertions, 250 deletions

diff --git a/host/examples/rx_ascii_art_dft.cpp b/host/examples/rx_ascii_art_dft.cpp
index 5a24867b4..b677bcb07 100644
--- a/host/examples/rx_ascii_art_dft.cpp
+++ b/host/examples/rx_ascii_art_dft.cpp
@@ -34,8 +34,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args;
     size_t num_bins;
-    double rate, freq, frame_rate;
-    float gain, ref_lvl, dyn_rng;
+    double rate, freq, gain, frame_rate;
+    float ref_lvl, dyn_rng;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -45,7 +45,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         // hardware parameters
         ("rate", po::value<double>(&rate), "rate of incoming samples (sps)")
         ("freq", po::value<double>(&freq)->default_value(0), "RF center frequency in Hz")
-        ("gain", po::value<float>(&gain)->default_value(0), "gain for the RF chain")
+        ("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
         // display parameters
         ("num-bins", po::value<size_t>(&num_bins)->default_value(512), "the number of bins in the DFT")
         ("frame-rate", po::value<double>(&frame_rate)->default_value(5), "frame rate of the display (fps)")
diff --git a/host/examples/rx_samples_to_file.cpp b/host/examples/rx_samples_to_file.cpp
index c80d2a6de..6a6528a12 100644
--- a/host/examples/rx_samples_to_file.cpp
+++ b/host/examples/rx_samples_to_file.cpp
@@ -33,8 +33,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args, file;
     size_t total_num_samps;
-    double rate, freq;
-    float gain;
+    double rate, freq, gain;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -45,7 +44,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
         ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
         ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
-        ("gain", po::value<float>(&gain)->default_value(0), "gain for the RF chain")
+        ("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
     ;
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
diff --git a/host/examples/rx_samples_to_udp.cpp b/host/examples/rx_samples_to_udp.cpp
index 488c95494..5f1cd4a57 100644
--- a/host/examples/rx_samples_to_udp.cpp
+++ b/host/examples/rx_samples_to_udp.cpp
@@ -33,8 +33,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args;
     size_t total_num_samps;
-    double rate, freq;
-    float gain;
+    double rate, freq, gain;
     std::string addr, port;
 
     //setup the program options
@@ -45,7 +44,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
         ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
         ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
-        ("gain", po::value<float>(&gain)->default_value(0), "gain for the RF chain")
+        ("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
         ("port", po::value<std::string>(&port)->default_value("7124"), "server udp port")
         ("addr", po::value<std::string>(&addr)->default_value("192.168.1.10"), "resolvable server address")
     ;
diff --git a/host/examples/tx_from_file.cpp b/host/examples/tx_from_file.cpp
index 40ce6db6b..392924c05 100644
--- a/host/examples/tx_from_file.cpp
+++ b/host/examples/tx_from_file.cpp
@@ -34,9 +34,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     time_t seconds_in_future;
     size_t total_num_samps;
     size_t samps_per_packet;
-    double tx_rate, freq;
+    double tx_rate, freq, gain;
     float ampl;
-    float tx_gain;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -48,7 +47,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("txrate", po::value<double>(&tx_rate)->default_value(100e6/16), "rate of outgoing samples")
         ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
         ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of each sample")
-        ("gain", po::value<float>(&tx_gain)->default_value(float(0)), "amplitude of each sample")
+        ("gain", po::value<double>(&gain)->default_value(0), "amplitude of each sample")
         ("dilv", "specify to disable inner-loop verbose")
     ;
     po::variables_map vm;
@@ -78,7 +77,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     sdev->set_tx_freq(freq);
     sdev->set_time_now(uhd::time_spec_t(0.0));
 
-    sdev->set_tx_gain(tx_gain);
+    sdev->set_gain(gain);
 
     //allocate data to send
     std::vector<std::complex<short> > buff;
diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp
index 751b79cf5..238a24b88 100644
--- a/host/examples/tx_waveforms.cpp
+++ b/host/examples/tx_waveforms.cpp
@@ -63,8 +63,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args, wave_type;
     size_t total_duration, spb;
-    double rate, freq, wave_freq;
-    float ampl, gain;
+    double rate, freq, gain, wave_freq;
+    float ampl;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -76,7 +76,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("rate", po::value<double>(&rate)->default_value(1.5e6), "rate of outgoing samples")
         ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
         ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of the waveform")
-        ("gain", po::value<float>(&gain)->default_value(float(0)), "gain for the RF chain")
+        ("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
         ("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
         ("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
     ;
diff --git a/host/include/uhd/usrp/codec_props.hpp b/host/include/uhd/usrp/codec_props.hpp
index ab09b1703..c3aba143f 100644
--- a/host/include/uhd/usrp/codec_props.hpp
+++ b/host/include/uhd/usrp/codec_props.hpp
@@ -30,8 +30,8 @@ namespace uhd{ namespace usrp{
     enum codec_prop_t{
         CODEC_PROP_NAME           = 'n', //ro, std::string
         CODEC_PROP_OTHERS         = 'o', //ro, prop_names_t
-        CODEC_PROP_GAIN_I         = 'i', //rw, float
-        CODEC_PROP_GAIN_Q         = 'q', //rw, float
+        CODEC_PROP_GAIN_I         = 'i', //rw, double
+        CODEC_PROP_GAIN_Q         = 'q', //rw, double
         CODEC_PROP_GAIN_RANGE     = 'r', //ro, gain_range_t
         CODEC_PROP_GAIN_NAMES     = 'G'  //ro, prop_names_t
     };
diff --git a/host/include/uhd/usrp/dboard_iface.hpp b/host/include/uhd/usrp/dboard_iface.hpp
index b04756c47..3ac170b52 100644
--- a/host/include/uhd/usrp/dboard_iface.hpp
+++ b/host/include/uhd/usrp/dboard_iface.hpp
@@ -102,7 +102,7 @@ public:
      * \param which_dac the dac index 0, 1, 2, 3...
      * \param value the value in volts
      */
-    virtual void write_aux_dac(unit_t unit, aux_dac_t which_dac, float value) = 0;
+    virtual void write_aux_dac(unit_t unit, aux_dac_t which_dac, double value) = 0;
 
     /*!
      * Read from an aux adc.
@@ -111,7 +111,7 @@ public:
      * \param which_adc the adc index 0, 1, 2, 3...
      * \return the value in volts
      */
-    virtual float read_aux_adc(unit_t unit, aux_adc_t which_adc) = 0;
+    virtual double read_aux_adc(unit_t unit, aux_adc_t which_adc) = 0;
 
     /*!
      * Set a daughterboard output pin control source.
@@ -191,8 +191,6 @@ public:
      */
     virtual boost::uint16_t get_gpio_out(unit_t unit);
 
-    UHD_DEPRECATED void write_gpio(unit_t unit, boost::uint16_t value){set_gpio_out(unit, value);}
-
     /*!
      * Setup the GPIO debug mux.
      *
diff --git a/host/include/uhd/usrp/multi_usrp.hpp b/host/include/uhd/usrp/multi_usrp.hpp
index 1db96a27e..b603d4324 100644
--- a/host/include/uhd/usrp/multi_usrp.hpp
+++ b/host/include/uhd/usrp/multi_usrp.hpp
@@ -257,10 +257,10 @@ public:
      * \param name the name of the gain element
      * \param chan the channel index 0 to N-1
      */
-    virtual void set_rx_gain(float gain, const std::string &name, size_t chan) = 0;
+    virtual void set_rx_gain(double gain, const std::string &name, size_t chan) = 0;
 
     //! A convenience wrapper for setting overall RX gain
-    void set_rx_gain(float gain, size_t chan){
+    void set_rx_gain(double gain, size_t chan){
         return this->set_rx_gain(gain, ALL_GAINS, chan);
     }
 
@@ -271,10 +271,10 @@ public:
      * \param chan the channel index 0 to N-1
      * \return the gain in dB
      */
-    virtual float get_rx_gain(const std::string &name, size_t chan) = 0;
+    virtual double get_rx_gain(const std::string &name, size_t chan) = 0;
 
     //! A convenience wrapper for getting overall RX gain
-    float get_rx_gain(size_t chan){
+    double get_rx_gain(size_t chan){
         return this->get_rx_gain(ALL_GAINS, chan);
     }
 
@@ -348,7 +348,7 @@ public:
      * \return the rssi in dB
      * \throw exception if RSSI readback not supported
      */
-    virtual float read_rssi(size_t chan) = 0;
+    virtual double read_rssi(size_t chan) = 0;
 
     /*!
      * Get the dboard interface object for the RX subdevice.
@@ -436,10 +436,10 @@ public:
      * \param name the name of the gain element
      * \param chan the channel index 0 to N-1
      */
-    virtual void set_tx_gain(float gain, const std::string &name, size_t chan) = 0;
+    virtual void set_tx_gain(double gain, const std::string &name, size_t chan) = 0;
 
     //! A convenience wrapper for setting overall TX gain
-    void set_tx_gain(float gain, size_t chan){
+    void set_tx_gain(double gain, size_t chan){
         return this->set_tx_gain(gain, ALL_GAINS, chan);
     }
 
@@ -450,10 +450,10 @@ public:
      * \param chan the channel index 0 to N-1
      * \return the gain in dB
      */
-    virtual float get_tx_gain(const std::string &name, size_t chan) = 0;
+    virtual double get_tx_gain(const std::string &name, size_t chan) = 0;
 
     //! A convenience wrapper for getting overall TX gain
-    float get_tx_gain(size_t chan){
+    double get_tx_gain(size_t chan){
         return this->get_tx_gain(ALL_GAINS, chan);
     }
 
diff --git a/host/include/uhd/usrp/single_usrp.hpp b/host/include/uhd/usrp/single_usrp.hpp
index bfbb90912..d56b0a47a 100644
--- a/host/include/uhd/usrp/single_usrp.hpp
+++ b/host/include/uhd/usrp/single_usrp.hpp
@@ -190,10 +190,10 @@ public:
      * \param name the name of the gain element
      * \param chan the channel index 0 to N-1
      */
-    virtual void set_rx_gain(float gain, const std::string &name, size_t chan = 0) = 0;
+    virtual void set_rx_gain(double gain, const std::string &name, size_t chan = 0) = 0;
 
     //! A convenience wrapper for setting overall RX gain
-    void set_rx_gain(float gain, size_t chan = 0){
+    void set_rx_gain(double gain, size_t chan = 0){
         return this->set_rx_gain(gain, ALL_GAINS, chan);
     }
 
@@ -204,10 +204,10 @@ public:
      * \param chan the channel index 0 to N-1
      * \return the gain in dB
      */
-    virtual float get_rx_gain(const std::string &name, size_t chan = 0) = 0;
+    virtual double get_rx_gain(const std::string &name, size_t chan = 0) = 0;
 
     //! A convenience wrapper for getting overall RX gain
-    float get_rx_gain(size_t chan = 0){
+    double get_rx_gain(size_t chan = 0){
         return this->get_rx_gain(ALL_GAINS, chan);
     }
 
@@ -281,7 +281,7 @@ public:
      * \return the rssi in dB
      * \throw exception if RSSI readback not supported
      */
-    virtual float read_rssi(size_t chan = 0) = 0;
+    virtual double read_rssi(size_t chan = 0) = 0;
 
     /*!
      * Get the dboard interface object for the RX subdevice.
@@ -359,10 +359,10 @@ public:
      * \param name the name of the gain element
      * \param chan the channel index 0 to N-1
      */
-    virtual void set_tx_gain(float gain, const std::string &name, size_t chan = 0) = 0;
+    virtual void set_tx_gain(double gain, const std::string &name, size_t chan = 0) = 0;
 
     //! A convenience wrapper for setting overall TX gain
-    void set_tx_gain(float gain, size_t chan = 0){
+    void set_tx_gain(double gain, size_t chan = 0){
         return this->set_tx_gain(gain, ALL_GAINS, chan);
     }
 
@@ -373,10 +373,10 @@ public:
      * \param chan the channel index 0 to N-1
      * \return the gain in dB
      */
-    virtual float get_tx_gain(const std::string &name, size_t chan = 0) = 0;
+    virtual double get_tx_gain(const std::string &name, size_t chan = 0) = 0;
 
     //! A convenience wrapper for getting overall TX gain
-    float get_tx_gain(size_t chan = 0){
+    double get_tx_gain(size_t chan = 0){
         return this->get_tx_gain(ALL_GAINS, chan);
     }
 
diff --git a/host/include/uhd/usrp/subdev_props.hpp b/host/include/uhd/usrp/subdev_props.hpp
index 8f096ffe4..fb4b5fc15 100644
--- a/host/include/uhd/usrp/subdev_props.hpp
+++ b/host/include/uhd/usrp/subdev_props.hpp
@@ -44,7 +44,7 @@ namespace uhd{ namespace usrp{
     enum subdev_prop_t{
         SUBDEV_PROP_NAME              = 'n', //ro, std::string
         SUBDEV_PROP_OTHERS            = 'o', //ro, prop_names_t
-        SUBDEV_PROP_GAIN              = 'g', //rw, float
+        SUBDEV_PROP_GAIN              = 'g', //rw, double
         SUBDEV_PROP_GAIN_RANGE        = 'r', //ro, gain_range_t
         SUBDEV_PROP_GAIN_NAMES        = 'G', //ro, prop_names_t
         SUBDEV_PROP_FREQ              = 'f', //rw, double
@@ -55,7 +55,7 @@ namespace uhd{ namespace usrp{
         SUBDEV_PROP_CONNECTION        = 'c', //ro, subdev_conn_t
         SUBDEV_PROP_ENABLED           = 'e', //rw, bool
         SUBDEV_PROP_USE_LO_OFFSET     = 'l', //ro, bool
-        SUBDEV_PROP_RSSI              = 'R', //ro, float
+        SUBDEV_PROP_RSSI              = 'R', //ro, double
         SUBDEV_PROP_BANDWIDTH         = 'B'  //rw, double
     };
 
diff --git a/host/include/uhd/utils/gain_group.hpp b/host/include/uhd/utils/gain_group.hpp
index 3d22b9118..7ef7bdcf5 100644
--- a/host/include/uhd/utils/gain_group.hpp
+++ b/host/include/uhd/utils/gain_group.hpp
@@ -28,16 +28,13 @@
 
 namespace uhd{
 
-//! the data type that represents a gain
-typedef double gain_t;
-
 /*!
  * A set of function to control a gain element.
  */
 struct UHD_API gain_fcns_t{
     boost::function<gain_range_t(void)> get_range;
-    boost::function<gain_t(void)>        get_value;
-    boost::function<void(gain_t)>        set_value;
+    boost::function<double(void)>        get_value;
+    boost::function<void(double)>        set_value;
 };
 
 class UHD_API gain_group : boost::noncopyable{
@@ -59,7 +56,7 @@ public:
      * \param name name of the gain element (optional)
      * \return a gain value of the element or all elements
      */
-    virtual gain_t get_value(const std::string &name = "") = 0;
+    virtual double get_value(const std::string &name = "") = 0;
 
     /*!
      * Set the gain value for the gain element specified by name.
@@ -69,7 +66,7 @@ public:
      * \param gain the gain to set for the lement or across the group
      * \param name name of the gain element (optional)
      */
-    virtual void set_value(gain_t gain, const std::string &name = "") = 0;
+    virtual void set_value(double gain, const std::string &name = "") = 0;
 
     /*!
      * Get a list of names of registered gain elements.
diff --git a/host/lib/usrp/dboard/db_basic_and_lf.cpp b/host/lib/usrp/dboard/db_basic_and_lf.cpp
index f771595b6..745c2d8e6 100644
--- a/host/lib/usrp/dboard/db_basic_and_lf.cpp
+++ b/host/lib/usrp/dboard/db_basic_and_lf.cpp
@@ -134,7 +134,7 @@ void basic_rx::rx_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        val = float(0);
+        val = double(0);
         return;
 
     case SUBDEV_PROP_GAIN_RANGE:
@@ -192,7 +192,7 @@ void basic_rx::rx_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<subdev_prop_t>()){
 
     case SUBDEV_PROP_GAIN:
-        UHD_ASSERT_THROW(val.as<float>() == float(0));
+        UHD_ASSERT_THROW(val.as<double>() == double(0));
         return;
 
     case SUBDEV_PROP_ANTENNA:
@@ -245,7 +245,7 @@ void basic_tx::tx_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        val = float(0);
+        val = double(0);
         return;
 
     case SUBDEV_PROP_GAIN_RANGE:
@@ -303,7 +303,7 @@ void basic_tx::tx_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<subdev_prop_t>()){
 
     case SUBDEV_PROP_GAIN:
-        UHD_ASSERT_THROW(val.as<float>() == float(0));
+        UHD_ASSERT_THROW(val.as<double>() == double(0));
         return;
 
     case SUBDEV_PROP_ANTENNA:
diff --git a/host/lib/usrp/dboard/db_dbsrx.cpp b/host/lib/usrp/dboard/db_dbsrx.cpp
index 7250136f5..491c282ad 100644
--- a/host/lib/usrp/dboard/db_dbsrx.cpp
+++ b/host/lib/usrp/dboard/db_dbsrx.cpp
@@ -70,7 +70,7 @@ public:
 private:
     double _lo_freq;
     double _bandwidth;
-    uhd::dict<std::string, float> _gains;
+    uhd::dict<std::string, double> _gains;
     max2118_write_regs_t _max2118_write_regs;
     max2118_read_regs_t _max2118_read_regs;
     boost::uint8_t _max2118_addr(void){
@@ -78,7 +78,7 @@ private:
     };
 
     void set_lo_freq(double target_freq);
-    void set_gain(float gain, const std::string &name);
+    void set_gain(double gain, const std::string &name);
     void set_bandwidth(double bandwidth);
 
     void send_reg(boost::uint8_t start_reg, boost::uint8_t stop_reg){
@@ -418,17 +418,17 @@ void dbsrx::set_lo_freq(double target_freq){
  * \param gain the requested gain in dB
  * \return 5 bit the register value
  */
-static int gain_to_gc2_vga_reg(float &gain){
+static int gain_to_gc2_vga_reg(double &gain){
     int reg = 0;
     gain = dbsrx_gain_ranges["GC2"].clip(gain);
 
     // Half dB steps from 0-5dB, 1dB steps from 5-24dB
     if (gain < 5) {
         reg = boost::math::iround(31.0 - gain/0.5);
-        gain = float(boost::math::iround(gain) * 0.5);
+        gain = double(boost::math::iround(gain) * 0.5);
     } else {
         reg = boost::math::iround(22.0 - (gain - 4.0));
-        gain = float(boost::math::iround(gain));
+        gain = double(boost::math::iround(gain));
     }
 
     if (dbsrx_debug) std::cerr << boost::format(
@@ -444,16 +444,16 @@ static int gain_to_gc2_vga_reg(float &gain){
  * \param gain the requested gain in dB
  * \return dac voltage value
  */
-static float gain_to_gc1_rfvga_dac(float &gain){
+static double gain_to_gc1_rfvga_dac(double &gain){
     //clip the input
     gain = dbsrx_gain_ranges["GC1"].clip(gain);
 
     //voltage level constants
-    static const float max_volts = float(1.2), min_volts = float(2.7);
-    static const float slope = (max_volts-min_volts)/dbsrx_gain_ranges["GC1"].stop();
+    static const double max_volts = 1.2, min_volts = 2.7;
+    static const double slope = (max_volts-min_volts)/dbsrx_gain_ranges["GC1"].stop();
 
     //calculate the voltage for the aux dac
-    float dac_volts = gain*slope + min_volts;
+    double dac_volts = gain*slope + min_volts;
 
     if (dbsrx_debug) std::cerr << boost::format(
         "DBSRX GC1 Gain: %f dB, dac_volts: %f V"
@@ -465,7 +465,7 @@ static float gain_to_gc1_rfvga_dac(float &gain){
     return dac_volts;
 }
 
-void dbsrx::set_gain(float gain, const std::string &name){
+void dbsrx::set_gain(double gain, const std::string &name){
     assert_has(dbsrx_gain_ranges.keys(), name, "dbsrx gain name");
     if (name == "GC2"){
         _max2118_write_regs.gc2 = gain_to_gc2_vga_reg(gain);
@@ -584,7 +584,7 @@ void dbsrx::rx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_gain(val.as<float>(), key.name);
+        this->set_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ENABLED:
diff --git a/host/lib/usrp/dboard/db_dbsrx2.cpp b/host/lib/usrp/dboard/db_dbsrx2.cpp
index cdafd6a78..1da9b5ff3 100644
--- a/host/lib/usrp/dboard/db_dbsrx2.cpp
+++ b/host/lib/usrp/dboard/db_dbsrx2.cpp
@@ -48,7 +48,7 @@ static const int dbsrx2_ref_divider = 4; // Hitachi HMC426 divider (U7)
 static const prop_names_t dbsrx2_antennas = list_of("J3");
 
 static const uhd::dict<std::string, gain_range_t> dbsrx2_gain_ranges = map_list_of
-    ("GC1", gain_range_t(0, 73, float(0.05)))
+    ("GC1", gain_range_t(0, 73, 0.05))
     ("BBG", gain_range_t(0, 15, 1))
 ;
 
@@ -66,7 +66,7 @@ public:
 private:
     double _lo_freq;
     double _bandwidth;
-    uhd::dict<std::string, float> _gains;
+    uhd::dict<std::string, double> _gains;
     max2112_write_regs_t _max2112_write_regs;
     max2112_read_regs_t _max2112_read_regs;
     boost::uint8_t _max2112_addr(){ //0x60 or 0x61 depending on which side
@@ -74,7 +74,7 @@ private:
     }
 
     void set_lo_freq(double target_freq);
-    void set_gain(float gain, const std::string &name);
+    void set_gain(double gain, const std::string &name);
     void set_bandwidth(double bandwidth);
 
     void send_reg(boost::uint8_t start_reg, boost::uint8_t stop_reg){
@@ -269,10 +269,10 @@ void dbsrx2::set_lo_freq(double target_freq){
  * \param gain the requested gain in dB
  * \return 4 bit the register value
  */
-static int gain_to_bbg_vga_reg(float &gain){
+static int gain_to_bbg_vga_reg(double &gain){
     int reg = boost::math::iround(dbsrx2_gain_ranges["BBG"].clip(gain));
 
-    gain = float(reg);
+    gain = double(reg);
 
     if (dbsrx2_debug) std::cerr 
         << boost::format("DBSRX2 BBG Gain:\n")
@@ -288,16 +288,16 @@ static int gain_to_bbg_vga_reg(float &gain){
  * \param gain the requested gain in dB
  * \return dac voltage value
  */
-static float gain_to_gc1_rfvga_dac(float &gain){
+static double gain_to_gc1_rfvga_dac(double &gain){
     //clip the input
     gain = dbsrx2_gain_ranges["GC1"].clip(gain);
 
     //voltage level constants
-    static const float max_volts = float(0.5), min_volts = float(2.7);
-    static const float slope = (max_volts-min_volts)/dbsrx2_gain_ranges["GC1"].stop();
+    static const double max_volts = 0.5, min_volts = 2.7;
+    static const double slope = (max_volts-min_volts)/dbsrx2_gain_ranges["GC1"].stop();
 
     //calculate the voltage for the aux dac
-    float dac_volts = gain*slope + min_volts;
+    double dac_volts = gain*slope + min_volts;
 
     if (dbsrx2_debug) std::cerr 
         << boost::format("DBSRX2 GC1 Gain:\n")
@@ -310,7 +310,7 @@ static float gain_to_gc1_rfvga_dac(float &gain){
     return dac_volts;
 }
 
-void dbsrx2::set_gain(float gain, const std::string &name){
+void dbsrx2::set_gain(double gain, const std::string &name){
     assert_has(dbsrx2_gain_ranges.keys(), name, "dbsrx2 gain name");
     if (name == "BBG"){
         _max2112_write_regs.bbg = gain_to_bbg_vga_reg(gain);
@@ -423,7 +423,7 @@ void dbsrx2::rx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_gain(val.as<float>(), key.name);
+        this->set_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ENABLED:
diff --git a/host/lib/usrp/dboard/db_rfx.cpp b/host/lib/usrp/dboard/db_rfx.cpp
index 74a9fb37b..3b66b6939 100644
--- a/host/lib/usrp/dboard/db_rfx.cpp
+++ b/host/lib/usrp/dboard/db_rfx.cpp
@@ -67,11 +67,11 @@ static const prop_names_t rfx_rx_antennas = list_of("TX/RX")("RX2");
 static const uhd::dict<std::string, gain_range_t> rfx_tx_gain_ranges; //empty
 
 static const uhd::dict<std::string, gain_range_t> rfx_rx_gain_ranges = map_list_of
-    ("PGA0", gain_range_t(0, 70, float(0.022)))
+    ("PGA0", gain_range_t(0, 70, 0.022))
 ;
 
 static const uhd::dict<std::string, gain_range_t> rfx400_rx_gain_ranges = map_list_of
-    ("PGA0", gain_range_t(0, 45, float(0.022)))
+    ("PGA0", gain_range_t(0, 45, 0.022))
 ;
 
 /***********************************************************************
@@ -98,14 +98,14 @@ private:
     const uhd::dict<dboard_iface::unit_t, bool> _div2;
     double       _rx_lo_freq, _tx_lo_freq;
     std::string  _rx_ant;
-    uhd::dict<std::string, float> _rx_gains;
+    uhd::dict<std::string, double> _rx_gains;
 
     void set_rx_lo_freq(double freq);
     void set_tx_lo_freq(double freq);
     void set_rx_ant(const std::string &ant);
     void set_tx_ant(const std::string &ant);
-    void set_rx_gain(float gain, const std::string &name);
-    void set_tx_gain(float gain, const std::string &name);
+    void set_rx_gain(double gain, const std::string &name);
+    void set_tx_gain(double gain, const std::string &name);
 
     /*!
      * Set the LO frequency for the particular dboard unit.
@@ -240,13 +240,13 @@ void rfx_xcvr::set_tx_ant(const std::string &ant){
 /***********************************************************************
  * Gain Handling
  **********************************************************************/
-static float rx_pga0_gain_to_dac_volts(float &gain, float range){
+static double rx_pga0_gain_to_dac_volts(double &gain, double range){
     //voltage level constants (negative slope)
-    static const float max_volts = float(.2), min_volts = float(1.2);
-    static const float slope = (max_volts-min_volts)/(range);
+    static const double max_volts = .2, min_volts = 1.2;
+    static const double slope = (max_volts-min_volts)/(range);
 
     //calculate the voltage for the aux dac
-    float dac_volts = std::clip<float>(gain*slope + min_volts, max_volts, min_volts);
+    double dac_volts = std::clip<double>(gain*slope + min_volts, max_volts, min_volts);
 
     //the actual gain setting
     gain = (dac_volts - min_volts)/slope;
@@ -254,15 +254,15 @@ static float rx_pga0_gain_to_dac_volts(float &gain, float range){
     return dac_volts;
 }
 
-void rfx_xcvr::set_tx_gain(float, const std::string &name){
+void rfx_xcvr::set_tx_gain(double, const std::string &name){
     assert_has(rfx_tx_gain_ranges.keys(), name, "rfx tx gain name");
     UHD_THROW_INVALID_CODE_PATH(); //no gains to set
 }
 
-void rfx_xcvr::set_rx_gain(float gain, const std::string &name){
+void rfx_xcvr::set_rx_gain(double gain, const std::string &name){
     assert_has(_rx_gain_ranges.keys(), name, "rfx rx gain name");
     if(name == "PGA0"){
-        float dac_volts = rx_pga0_gain_to_dac_volts(gain, 
+        double dac_volts = rx_pga0_gain_to_dac_volts(gain, 
                               (_rx_gain_ranges["PGA0"].stop() - _rx_gain_ranges["PGA0"].start()));
         _rx_gains[name] = gain;
 
@@ -474,7 +474,7 @@ void rfx_xcvr::rx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_rx_gain(val.as<float>(), key.name);
+        this->set_rx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ANTENNA:
@@ -571,7 +571,7 @@ void rfx_xcvr::tx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_tx_gain(val.as<float>(), key.name);
+        this->set_tx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ANTENNA:
diff --git a/host/lib/usrp/dboard/db_tvrx.cpp b/host/lib/usrp/dboard/db_tvrx.cpp
index 2508555d0..f034f0ef6 100644
--- a/host/lib/usrp/dboard/db_tvrx.cpp
+++ b/host/lib/usrp/dboard/db_tvrx.cpp
@@ -119,8 +119,8 @@ static uhd::dict<std::string, gain_range_t> get_tvrx_gain_ranges(void) {
     double ifmax = tvrx_if_gains_db.back();
 
     return map_list_of
-        ("RF", gain_range_t(float(rfmin), float(rfmax), float((rfmax-rfmin)/4096.0)))
-        ("IF", gain_range_t(float(ifmin), float(ifmax), float((ifmax-ifmin)/4096.0)))
+        ("RF", gain_range_t(rfmin, rfmax, (rfmax-rfmin)/4096.0))
+        ("IF", gain_range_t(ifmin, ifmax, (ifmax-ifmin)/4096.0))
     ;
 }
 
@@ -141,14 +141,14 @@ public:
     void rx_set(const wax::obj &key, const wax::obj &val);
 
 private:
-    uhd::dict<std::string, float> _gains;
+    uhd::dict<std::string, double> _gains;
     double _lo_freq;
     tuner_4937di5_regs_t _tuner_4937di5_regs;
     boost::uint8_t _tuner_4937di5_addr(void){
         return (this->get_iface()->get_special_props().mangle_i2c_addrs)? 0x61 : 0x60; //ok really? we could rename that call
     };
 
-    void set_gain(float gain, const std::string &name);
+    void set_gain(double gain, const std::string &name);
     void set_freq(double freq);
 
     void update_regs(void){
@@ -275,7 +275,7 @@ static double gain_interp(double gain, boost::array<double, 17> db_vector, boost
  * \return dac voltage value
  */
 
-static float rf_gain_to_voltage(float gain, double lo_freq){
+static double rf_gain_to_voltage(double gain, double lo_freq){
     //clip the input
     gain = get_tvrx_gain_ranges()["RF"].clip(gain);
 
@@ -293,7 +293,7 @@ static float rf_gain_to_voltage(float gain, double lo_freq){
         "tvrx RF AGC gain: %f dB, dac_volts: %f V"
     ) % gain % dac_volts << std::endl;
 
-    return float(dac_volts);
+    return dac_volts;
 }
 
 /*!
@@ -303,7 +303,7 @@ static float rf_gain_to_voltage(float gain, double lo_freq){
  * \return dac voltage value
  */
 
-static float if_gain_to_voltage(float gain){
+static double if_gain_to_voltage(double gain){
     //clip the input
     gain = get_tvrx_gain_ranges()["IF"].clip(gain);
 
@@ -316,10 +316,10 @@ static float if_gain_to_voltage(float gain){
         "tvrx IF AGC gain: %f dB, dac_volts: %f V"
     ) % gain % dac_volts << std::endl;
 
-    return float(dac_volts);
+    return dac_volts;
 }
 
-void tvrx::set_gain(float gain, const std::string &name){
+void tvrx::set_gain(double gain, const std::string &name){
     assert_has(get_tvrx_gain_ranges().keys(), name, "tvrx gain name");
     if (name == "RF"){
         this->get_iface()->write_aux_dac(dboard_iface::UNIT_RX, dboard_iface::AUX_DAC_B, rf_gain_to_voltage(gain, _lo_freq));
@@ -473,7 +473,7 @@ void tvrx::rx_set(const wax::obj &key_, const wax::obj &val){
     //handle the get request conditioned on the key
     switch(key.as<subdev_prop_t>()){
     case SUBDEV_PROP_GAIN:
-        this->set_gain(val.as<float>(), key.name);
+        this->set_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_FREQ:
diff --git a/host/lib/usrp/dboard/db_unknown.cpp b/host/lib/usrp/dboard/db_unknown.cpp
index 168e1971c..ccda93c04 100644
--- a/host/lib/usrp/dboard/db_unknown.cpp
+++ b/host/lib/usrp/dboard/db_unknown.cpp
@@ -115,7 +115,7 @@ void unknown_rx::rx_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        val = float(0);
+        val = double(0);
         return;
 
     case SUBDEV_PROP_GAIN_RANGE:
@@ -173,7 +173,7 @@ void unknown_rx::rx_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<subdev_prop_t>()){
 
     case SUBDEV_PROP_GAIN:
-        UHD_ASSERT_THROW(val.as<float>() == float(0));
+        UHD_ASSERT_THROW(val.as<double>() == double(0));
         return;
 
     case SUBDEV_PROP_ANTENNA:
@@ -217,7 +217,7 @@ void unknown_tx::tx_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        val = float(0);
+        val = double(0);
         return;
 
     case SUBDEV_PROP_GAIN_RANGE:
@@ -275,7 +275,7 @@ void unknown_tx::tx_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<subdev_prop_t>()){
 
     case SUBDEV_PROP_GAIN:
-        UHD_ASSERT_THROW(val.as<float>() == float(0));
+        UHD_ASSERT_THROW(val.as<double>() == double(0));
         return;
 
     case SUBDEV_PROP_ANTENNA:
diff --git a/host/lib/usrp/dboard/db_wbx.cpp b/host/lib/usrp/dboard/db_wbx.cpp
index dd5bd600b..cdf23836b 100644
--- a/host/lib/usrp/dboard/db_wbx.cpp
+++ b/host/lib/usrp/dboard/db_wbx.cpp
@@ -94,11 +94,11 @@ static const prop_names_t wbx_tx_antennas = list_of("TX/RX");
 static const prop_names_t wbx_rx_antennas = list_of("TX/RX")("RX2");
 
 static const uhd::dict<std::string, gain_range_t> wbx_tx_gain_ranges = map_list_of
-    ("PGA0", gain_range_t(0, 25, float(0.05)))
+    ("PGA0", gain_range_t(0, 25, 0.05))
 ;
 
 static const uhd::dict<std::string, gain_range_t> wbx_rx_gain_ranges = map_list_of
-    ("PGA0", gain_range_t(0, 31.5, float(0.5)))
+    ("PGA0", gain_range_t(0, 31.5, 0.5))
 ;
 
 /***********************************************************************
@@ -116,7 +116,7 @@ public:
     void tx_set(const wax::obj &key, const wax::obj &val);
 
 private:
-    uhd::dict<std::string, float> _tx_gains, _rx_gains;
+    uhd::dict<std::string, double> _tx_gains, _rx_gains;
     double       _rx_lo_freq, _tx_lo_freq;
     std::string  _tx_ant, _rx_ant;
 
@@ -124,8 +124,8 @@ private:
     void set_tx_lo_freq(double freq);
     void set_rx_ant(const std::string &ant);
     void set_tx_ant(const std::string &ant);
-    void set_rx_gain(float gain, const std::string &name);
-    void set_tx_gain(float gain, const std::string &name);
+    void set_rx_gain(double gain, const std::string &name);
+    void set_tx_gain(double gain, const std::string &name);
 
     void update_atr(void);
 
@@ -196,12 +196,12 @@ wbx_xcvr::~wbx_xcvr(void){
 /***********************************************************************
  * Gain Handling
  **********************************************************************/
-static int rx_pga0_gain_to_iobits(float &gain){
+static int rx_pga0_gain_to_iobits(double &gain){
     //clip the input
     gain = wbx_rx_gain_ranges["PGA0"].clip(gain);
 
     //convert to attenuation and update iobits for atr
-    float attn = wbx_rx_gain_ranges["PGA0"].stop() - gain;
+    double attn = wbx_rx_gain_ranges["PGA0"].stop() - gain;
 
     //calculate the attenuation
     int attn_code = boost::math::iround(attn*2);
@@ -212,21 +212,21 @@ static int rx_pga0_gain_to_iobits(float &gain){
     ) % attn % attn_code % (iobits & RX_ATTN_MASK) % RX_ATTN_MASK << std::endl;
 
     //the actual gain setting
-    gain = wbx_rx_gain_ranges["PGA0"].stop() - float(attn_code)/2;
+    gain = wbx_rx_gain_ranges["PGA0"].stop() - double(attn_code)/2;
 
     return iobits;
 }
 
-static float tx_pga0_gain_to_dac_volts(float &gain){
+static double tx_pga0_gain_to_dac_volts(double &gain){
     //clip the input
     gain = wbx_tx_gain_ranges["PGA0"].clip(gain);
 
     //voltage level constants
-    static const float max_volts = float(0.5), min_volts = float(1.4);
-    static const float slope = (max_volts-min_volts)/wbx_tx_gain_ranges["PGA0"].stop();
+    static const double max_volts = 0.5, min_volts = 1.4;
+    static const double slope = (max_volts-min_volts)/wbx_tx_gain_ranges["PGA0"].stop();
 
     //calculate the voltage for the aux dac
-    float dac_volts = gain*slope + min_volts;
+    double dac_volts = gain*slope + min_volts;
 
     if (wbx_debug) std::cerr << boost::format(
         "WBX TX Gain: %f dB, dac_volts: %f V"
@@ -238,10 +238,10 @@ static float tx_pga0_gain_to_dac_volts(float &gain){
     return dac_volts;
 }
 
-void wbx_xcvr::set_tx_gain(float gain, const std::string &name){
+void wbx_xcvr::set_tx_gain(double gain, const std::string &name){
     assert_has(wbx_tx_gain_ranges.keys(), name, "wbx tx gain name");
     if(name == "PGA0"){
-        float dac_volts = tx_pga0_gain_to_dac_volts(gain);
+        double dac_volts = tx_pga0_gain_to_dac_volts(gain);
         _tx_gains[name] = gain;
 
         //write the new voltage to the aux dac
@@ -250,7 +250,7 @@ void wbx_xcvr::set_tx_gain(float gain, const std::string &name){
     else UHD_THROW_INVALID_CODE_PATH();
 }
 
-void wbx_xcvr::set_rx_gain(float gain, const std::string &name){
+void wbx_xcvr::set_rx_gain(double gain, const std::string &name){
     assert_has(wbx_rx_gain_ranges.keys(), name, "wbx rx gain name");
     if(name == "PGA0"){
         rx_pga0_gain_to_iobits(gain);
@@ -544,7 +544,7 @@ void wbx_xcvr::rx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_rx_gain(val.as<float>(), key.name);
+        this->set_rx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ANTENNA:
@@ -645,7 +645,7 @@ void wbx_xcvr::tx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_tx_gain(val.as<float>(), key.name);
+        this->set_tx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ANTENNA:
diff --git a/host/lib/usrp/dboard/db_xcvr2450.cpp b/host/lib/usrp/dboard/db_xcvr2450.cpp
index 78eceff99..6fb5a26a8 100644
--- a/host/lib/usrp/dboard/db_xcvr2450.cpp
+++ b/host/lib/usrp/dboard/db_xcvr2450.cpp
@@ -109,7 +109,7 @@ public:
 private:
     double _lo_freq;
     double _rx_bandwidth, _tx_bandwidth;
-    uhd::dict<std::string, float> _tx_gains, _rx_gains;
+    uhd::dict<std::string, double> _tx_gains, _rx_gains;
     std::string _tx_ant, _rx_ant;
     int _ad9515div;
     max2829_regs_t _max2829_regs;
@@ -117,8 +117,8 @@ private:
     void set_lo_freq(double target_freq);
     void set_tx_ant(const std::string &ant);
     void set_rx_ant(const std::string &ant);
-    void set_tx_gain(float gain, const std::string &name);
-    void set_rx_gain(float gain, const std::string &name);
+    void set_tx_gain(double gain, const std::string &name);
+    void set_rx_gain(double gain, const std::string &name);
     void set_rx_bandwidth(double bandwidth);
     void set_tx_bandwidth(double bandwidth);
 
@@ -150,12 +150,12 @@ private:
      * Read the RSSI from the aux adc
      * \return the rssi in dB
      */
-    float get_rssi(void){
+    double get_rssi(void){
         //constants for the rssi calculation
-        static const float min_v = float(0.5), max_v = float(2.5);
-        static const float rssi_dyn_range = 60;
+        static const double min_v = 0.5, max_v = 2.5;
+        static const double rssi_dyn_range = 60;
         //calculate the rssi from the voltage
-        float voltage = this->get_iface()->read_aux_adc(dboard_iface::UNIT_RX, dboard_iface::AUX_ADC_B);
+        double voltage = this->get_iface()->read_aux_adc(dboard_iface::UNIT_RX, dboard_iface::AUX_ADC_B);
         return rssi_dyn_range*(voltage - min_v)/(max_v - min_v);
     }
 };
@@ -355,14 +355,14 @@ void xcvr2450::set_rx_ant(const std::string &ant){
  * \param gain the requested gain in dB
  * \return 6 bit the register value
  */
-static int gain_to_tx_vga_reg(float &gain){
+static int gain_to_tx_vga_reg(double &gain){
     //calculate the register value
     int reg = std::clip(boost::math::iround(gain*60/30.0) + 3, 0, 63);
 
     //calculate the actual gain value
     if (reg < 4)       gain = 0;
-    else if (reg < 48) gain = float(reg/2 - 1);
-    else               gain = float(reg/2.0 - 1.5);
+    else if (reg < 48) gain = double(reg/2 - 1);
+    else               gain = double(reg/2.0 - 1.5);
 
     //return register value
     return reg;
@@ -374,7 +374,7 @@ static int gain_to_tx_vga_reg(float &gain){
  * \param gain the requested gain in dB
  * \return gain enum value
  */
-static max2829_regs_t::tx_baseband_gain_t gain_to_tx_bb_reg(float &gain){
+static max2829_regs_t::tx_baseband_gain_t gain_to_tx_bb_reg(double &gain){
     int reg = std::clip(boost::math::iround(gain*3/5.0), 0, 3);
     switch(reg){
     case 0:
@@ -399,9 +399,9 @@ static max2829_regs_t::tx_baseband_gain_t gain_to_tx_bb_reg(float &gain){
  * \param gain the requested gain in dB
  * \return 5 bit the register value
  */
-static int gain_to_rx_vga_reg(float &gain){
+static int gain_to_rx_vga_reg(double &gain){
     int reg = std::clip(boost::math::iround(gain/2.0), 0, 31);
-    gain = float(reg*2);
+    gain = double(reg*2);
     return reg;
 }
 
@@ -411,7 +411,7 @@ static int gain_to_rx_vga_reg(float &gain){
  * \param gain the requested gain in dB
  * \return 2 bit the register value
  */
-static int gain_to_rx_lna_reg(float &gain){
+static int gain_to_rx_lna_reg(double &gain){
     int reg = std::clip(boost::math::iround(gain*2/30.5) + 1, 0, 3);
     switch(reg){
     case 0:
@@ -422,7 +422,7 @@ static int gain_to_rx_lna_reg(float &gain){
     return reg;
 }
 
-void xcvr2450::set_tx_gain(float gain, const std::string &name){
+void xcvr2450::set_tx_gain(double gain, const std::string &name){
     assert_has(xcvr_tx_gain_ranges.keys(), name, "xcvr tx gain name");
     if (name == "VGA"){
         _max2829_regs.tx_vga_gain = gain_to_tx_vga_reg(gain);
@@ -436,7 +436,7 @@ void xcvr2450::set_tx_gain(float gain, const std::string &name){
     _tx_gains[name] = gain;
 }
 
-void xcvr2450::set_rx_gain(float gain, const std::string &name){
+void xcvr2450::set_rx_gain(double gain, const std::string &name){
     assert_has(xcvr_rx_gain_ranges.keys(), name, "xcvr rx gain name");
     if (name == "VGA"){
         _max2829_regs.rx_vga_gain = gain_to_rx_vga_reg(gain);
@@ -643,7 +643,7 @@ void xcvr2450::rx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_rx_gain(val.as<float>(), key.name);
+        this->set_rx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_ANTENNA:
@@ -742,7 +742,7 @@ void xcvr2450::tx_set(const wax::obj &key_, const wax::obj &val){
         return;
 
     case SUBDEV_PROP_GAIN:
-        this->set_tx_gain(val.as<float>(), key.name);
+        this->set_tx_gain(val.as<double>(), key.name);
         return;
 
     case SUBDEV_PROP_BANDWIDTH:
diff --git a/host/lib/usrp/misc_utils.cpp b/host/lib/usrp/misc_utils.cpp
index 5856d706f..0385187eb 100644
--- a/host/lib/usrp/misc_utils.cpp
+++ b/host/lib/usrp/misc_utils.cpp
@@ -39,24 +39,24 @@ static gain_range_t get_codec_gain_range(wax::obj codec, const std::string &name
     return codec[named_prop_t(CODEC_PROP_GAIN_RANGE, name)].as<gain_range_t>();
 }
 
-static float get_codec_gain_i(wax::obj codec, const std::string &name){
-    return codec[named_prop_t(CODEC_PROP_GAIN_I, name)].as<float>();
+static double get_codec_gain_i(wax::obj codec, const std::string &name){
+    return codec[named_prop_t(CODEC_PROP_GAIN_I, name)].as<double>();
 }
 
-static float get_codec_gain_q(wax::obj codec, const std::string &name){
-    return codec[named_prop_t(CODEC_PROP_GAIN_Q, name)].as<float>();
+static double get_codec_gain_q(wax::obj codec, const std::string &name){
+    return codec[named_prop_t(CODEC_PROP_GAIN_Q, name)].as<double>();
 }
 
-static void set_codec_gain_both(wax::obj codec, const std::string &name, float gain){
+static void set_codec_gain_both(wax::obj codec, const std::string &name, double gain){
     codec[named_prop_t(CODEC_PROP_GAIN_I, name)] = gain;
     codec[named_prop_t(CODEC_PROP_GAIN_Q, name)] = gain;
 }
 
-static void set_codec_gain_i(wax::obj codec, const std::string &name, float gain){
+static void set_codec_gain_i(wax::obj codec, const std::string &name, double gain){
     codec[named_prop_t(CODEC_PROP_GAIN_I, name)] = gain;
 }
 
-static void set_codec_gain_q(wax::obj codec, const std::string &name, float gain){
+static void set_codec_gain_q(wax::obj codec, const std::string &name, double gain){
     codec[named_prop_t(CODEC_PROP_GAIN_Q, name)] = gain;
 }
 
@@ -64,15 +64,15 @@ static void set_codec_gain_q(wax::obj codec, const std::string &name, float gain
  * subdev gain group helper functions:
  *    do this so we dont have to bind a templated function
  **********************************************************************/
-static float get_subdev_gain(wax::obj subdev, const std::string &name){
-    return subdev[named_prop_t(SUBDEV_PROP_GAIN, name)].as<float>();
+static double get_subdev_gain(wax::obj subdev, const std::string &name){
+    return subdev[named_prop_t(SUBDEV_PROP_GAIN, name)].as<double>();
 }
 
 static gain_range_t get_subdev_gain_range(wax::obj subdev, const std::string &name){
     return subdev[named_prop_t(SUBDEV_PROP_GAIN_RANGE, name)].as<gain_range_t>();
 }
 
-static void set_subdev_gain(wax::obj subdev, const std::string &name, float gain){
+static void set_subdev_gain(wax::obj subdev, const std::string &name, double gain){
     subdev[named_prop_t(SUBDEV_PROP_GAIN, name)] = gain;
 }
 
diff --git a/host/lib/usrp/multi_usrp.cpp b/host/lib/usrp/multi_usrp.cpp
index baf87ced5..ab78fb4b6 100644
--- a/host/lib/usrp/multi_usrp.cpp
+++ b/host/lib/usrp/multi_usrp.cpp
@@ -239,11 +239,11 @@ public:
         return add_dsp_shift(_rx_subdev(chan)[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>(), _rx_dsp(chan/rx_cpm()));
     }
 
-    void set_rx_gain(float gain, const std::string &name, size_t chan){
+    void set_rx_gain(double gain, const std::string &name, size_t chan){
         return _rx_gain_group(chan)->set_value(gain, name);
     }
 
-    float get_rx_gain(const std::string &name, size_t chan){
+    double get_rx_gain(const std::string &name, size_t chan){
         return _rx_gain_group(chan)->get_value(name);
     }
 
@@ -279,8 +279,8 @@ public:
         return _rx_subdev(chan)[SUBDEV_PROP_BANDWIDTH].as<double>();
     }
 
-    float read_rssi(size_t chan){
-        return _rx_subdev(chan)[SUBDEV_PROP_RSSI].as<float>();
+    double read_rssi(size_t chan){
+        return _rx_subdev(chan)[SUBDEV_PROP_RSSI].as<double>();
     }
 
     dboard_iface::sptr get_rx_dboard_iface(size_t chan){
@@ -337,11 +337,11 @@ public:
         return add_dsp_shift(_tx_subdev(chan)[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>(), _tx_dsp(chan/tx_cpm()));
     }
 
-    void set_tx_gain(float gain, const std::string &name, size_t chan){
+    void set_tx_gain(double gain, const std::string &name, size_t chan){
         return _tx_gain_group(chan)->set_value(gain, name);
     }
 
-    float get_tx_gain(const std::string &name, size_t chan){
+    double get_tx_gain(const std::string &name, size_t chan){
         return _tx_gain_group(chan)->get_value(name);
     }
 
diff --git a/host/lib/usrp/single_usrp.cpp b/host/lib/usrp/single_usrp.cpp
index 12730929a..e63cdaea9 100644
--- a/host/lib/usrp/single_usrp.cpp
+++ b/host/lib/usrp/single_usrp.cpp
@@ -164,11 +164,11 @@ public:
         return add_dsp_shift(_rx_subdev(chan)[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>(), _rx_dsp());
     }
 
-    void set_rx_gain(float gain, const std::string &name, size_t chan){
+    void set_rx_gain(double gain, const std::string &name, size_t chan){
         return _rx_gain_group(chan)->set_value(gain, name);
     }
 
-    float get_rx_gain(const std::string &name, size_t chan){
+    double get_rx_gain(const std::string &name, size_t chan){
         return _rx_gain_group(chan)->get_value(name);
     }
 
@@ -204,8 +204,8 @@ public:
         return _rx_subdev(chan)[SUBDEV_PROP_BANDWIDTH].as<double>();
     }
 
-    float read_rssi(size_t chan){
-        return _rx_subdev(chan)[SUBDEV_PROP_RSSI].as<float>();
+    double read_rssi(size_t chan){
+        return _rx_subdev(chan)[SUBDEV_PROP_RSSI].as<double>();
     }
 
     dboard_iface::sptr get_rx_dboard_iface(size_t chan){
@@ -250,11 +250,11 @@ public:
         return add_dsp_shift(_tx_subdev(chan)[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>(), _tx_dsp());
     }
 
-    void set_tx_gain(float gain, const std::string &name, size_t chan){
+    void set_tx_gain(double gain, const std::string &name, size_t chan){
         return _tx_gain_group(chan)->set_value(gain, name);
     }
 
-    float get_tx_gain(const std::string &name, size_t chan){
+    double get_tx_gain(const std::string &name, size_t chan){
         return _tx_gain_group(chan)->get_value(name);
     }
 
diff --git a/host/lib/usrp/usrp1/codec_ctrl.cpp b/host/lib/usrp/usrp1/codec_ctrl.cpp
index 18f794632..553f78ef8 100644
--- a/host/lib/usrp/usrp1/codec_ctrl.cpp
+++ b/host/lib/usrp/usrp1/codec_ctrl.cpp
@@ -35,7 +35,7 @@ using namespace uhd;
 
 static const bool codec_debug = false;
 
-const gain_range_t usrp1_codec_ctrl::tx_pga_gain_range(-20, 0, float(0.1));
+const gain_range_t usrp1_codec_ctrl::tx_pga_gain_range(-20, 0, double(0.1));
 const gain_range_t usrp1_codec_ctrl::rx_pga_gain_range(0, 20, 1);
 
 /***********************************************************************
@@ -50,17 +50,17 @@ public:
     ~usrp1_codec_ctrl_impl(void);
 
     //aux adc and dac control
-    float read_aux_adc(aux_adc_t which);
-    void write_aux_dac(aux_dac_t which, float volts);
+    double read_aux_adc(aux_adc_t which);
+    void write_aux_dac(aux_dac_t which, double volts);
 
     //duc control
     void set_duc_freq(double freq);
 
     //pga gain control
-    void set_tx_pga_gain(float);
-    float get_tx_pga_gain(void);
-    void set_rx_pga_gain(float, char);
-    float get_rx_pga_gain(char);
+    void set_tx_pga_gain(double);
+    double get_tx_pga_gain(void);
+    void set_rx_pga_gain(double, char);
+    double get_rx_pga_gain(char);
     
     //rx adc buffer control
     void bypass_adc_buffers(bool bypass);
@@ -159,19 +159,19 @@ usrp1_codec_ctrl_impl::~usrp1_codec_ctrl_impl(void)
  **********************************************************************/
 static const int mtpgw = 255; //maximum tx pga gain word
 
-void usrp1_codec_ctrl_impl::set_tx_pga_gain(float gain){
+void usrp1_codec_ctrl_impl::set_tx_pga_gain(double gain){
     int gain_word = int(mtpgw*(gain - tx_pga_gain_range.start())/(tx_pga_gain_range.stop() - tx_pga_gain_range.start()));
     _ad9862_regs.tx_pga_gain = std::clip(gain_word, 0, mtpgw);
     this->send_reg(16);
 }
 
-float usrp1_codec_ctrl_impl::get_tx_pga_gain(void){
+double usrp1_codec_ctrl_impl::get_tx_pga_gain(void){
     return (_ad9862_regs.tx_pga_gain*(tx_pga_gain_range.stop() - tx_pga_gain_range.start())/mtpgw) + tx_pga_gain_range.start();
 }
 
 static const int mrpgw = 0x14; //maximum rx pga gain word
 
-void usrp1_codec_ctrl_impl::set_rx_pga_gain(float gain, char which){
+void usrp1_codec_ctrl_impl::set_rx_pga_gain(double gain, char which){
     int gain_word = int(mrpgw*(gain - rx_pga_gain_range.start())/(rx_pga_gain_range.stop() - rx_pga_gain_range.start()));
     gain_word = std::clip(gain_word, 0, mrpgw);
     switch(which){
@@ -187,7 +187,7 @@ void usrp1_codec_ctrl_impl::set_rx_pga_gain(float gain, char which){
     }
 }
 
-float usrp1_codec_ctrl_impl::get_rx_pga_gain(char which){
+double usrp1_codec_ctrl_impl::get_rx_pga_gain(char which){
     int gain_word;
     switch(which){
     case 'A': gain_word = _ad9862_regs.rx_pga_a; break;
@@ -200,12 +200,12 @@ float usrp1_codec_ctrl_impl::get_rx_pga_gain(char which){
 /***********************************************************************
  * Codec Control AUX ADC Methods
  **********************************************************************/
-static float aux_adc_to_volts(boost::uint8_t high, boost::uint8_t low)
+static double aux_adc_to_volts(boost::uint8_t high, boost::uint8_t low)
 {
-    return float(((boost::uint16_t(high) << 2) | low)*3.3)/0x3ff;
+    return double(((boost::uint16_t(high) << 2) | low)*3.3)/0x3ff;
 }
 
-float usrp1_codec_ctrl_impl::read_aux_adc(aux_adc_t which)
+double usrp1_codec_ctrl_impl::read_aux_adc(aux_adc_t which)
 {
     //check to see if the switch needs to be set
     bool write_switch = false;
@@ -259,7 +259,7 @@ float usrp1_codec_ctrl_impl::read_aux_adc(aux_adc_t which)
 /***********************************************************************
  * Codec Control AUX DAC Methods
  **********************************************************************/
-void usrp1_codec_ctrl_impl::write_aux_dac(aux_dac_t which, float volts)
+void usrp1_codec_ctrl_impl::write_aux_dac(aux_dac_t which, double volts)
 {
     //special case for aux dac d (aka sigma delta word)
     if (which == AUX_DAC_D) {
diff --git a/host/lib/usrp/usrp1/codec_ctrl.hpp b/host/lib/usrp/usrp1/codec_ctrl.hpp
index e2e8a010d..c0f44ebf4 100644
--- a/host/lib/usrp/usrp1/codec_ctrl.hpp
+++ b/host/lib/usrp/usrp1/codec_ctrl.hpp
@@ -61,7 +61,7 @@ public:
      * \param which which of the 4 adcs
      * \return a value in volts
      */
-    virtual float read_aux_adc(aux_adc_t which) = 0;
+    virtual double read_aux_adc(aux_adc_t which) = 0;
 
     //! aux dac identifier constants
     enum aux_dac_t{
@@ -76,19 +76,19 @@ public:
      * \param which which of the 4 dacs
      * \param volts the level in in volts
      */
-    virtual void write_aux_dac(aux_dac_t which, float volts) = 0;
+    virtual void write_aux_dac(aux_dac_t which, double volts) = 0;
 
     //! Set the TX PGA gain
-    virtual void set_tx_pga_gain(float gain) = 0;
+    virtual void set_tx_pga_gain(double gain) = 0;
 
     //! Get the TX PGA gain
-    virtual float get_tx_pga_gain(void) = 0;
+    virtual double get_tx_pga_gain(void) = 0;
 
     //! Set the RX PGA gain ('A' or 'B')
-    virtual void set_rx_pga_gain(float gain, char which) = 0;
+    virtual void set_rx_pga_gain(double gain, char which) = 0;
 
     //! Get the RX PGA gain ('A' or 'B')
-    virtual float get_rx_pga_gain(char which) = 0;
+    virtual double get_rx_pga_gain(char which) = 0;
 
     //! Set the TX modulator frequency
     virtual void set_duc_freq(double freq) = 0;
diff --git a/host/lib/usrp/usrp1/codec_impl.cpp b/host/lib/usrp/usrp1/codec_impl.cpp
index db53be53e..fe60c8b9a 100644
--- a/host/lib/usrp/usrp1/codec_impl.cpp
+++ b/host/lib/usrp/usrp1/codec_impl.cpp
@@ -92,12 +92,12 @@ void usrp1_impl::rx_codec_set(const wax::obj &key_, const wax::obj &val, dboard_
     switch(key.as<codec_prop_t>()) {
     case CODEC_PROP_GAIN_I:
         UHD_ASSERT_THROW(key.name == adc_pga_gain_name);
-        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<float>(), 'A');
+        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<double>(), 'A');
         return;
 
     case CODEC_PROP_GAIN_Q:
         UHD_ASSERT_THROW(key.name == adc_pga_gain_name);
-        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<float>(), 'B');
+        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<double>(), 'B');
         return;
 
     default: UHD_THROW_PROP_SET_ERROR();
@@ -151,7 +151,7 @@ void usrp1_impl::tx_codec_set(const wax::obj &key_, const wax::obj &val, dboard_
     case CODEC_PROP_GAIN_I: //only one gain for I and Q
     case CODEC_PROP_GAIN_Q:
         UHD_ASSERT_THROW(key.name == dac_pga_gain_name);
-        _codec_ctrls[dboard_slot]->set_tx_pga_gain(val.as<float>());
+        _codec_ctrls[dboard_slot]->set_tx_pga_gain(val.as<double>());
         return;
 
     default: UHD_THROW_PROP_SET_ERROR();
diff --git a/host/lib/usrp/usrp1/dboard_iface.cpp b/host/lib/usrp/usrp1/dboard_iface.cpp
index 4e47d6bf6..180faf1da 100644
--- a/host/lib/usrp/usrp1/dboard_iface.cpp
+++ b/host/lib/usrp/usrp1/dboard_iface.cpp
@@ -72,8 +72,8 @@ public:
         return props;
     }
 
-    void write_aux_dac(unit_t, aux_dac_t, float);
-    float read_aux_adc(unit_t, aux_adc_t);
+    void write_aux_dac(unit_t, aux_dac_t, double);
+    double read_aux_adc(unit_t, aux_adc_t);
 
     void _set_pin_ctrl(unit_t, boost::uint16_t);
     void _set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
@@ -369,7 +369,7 @@ byte_vector_t usrp1_dboard_iface::read_i2c(boost::uint8_t addr,
  * Aux DAX/ADC
  **********************************************************************/
 void usrp1_dboard_iface::write_aux_dac(dboard_iface::unit_t,
-                                       aux_dac_t which, float value)
+                                       aux_dac_t which, double value)
 {
     //same aux dacs for each unit
     static const uhd::dict<aux_dac_t, usrp1_codec_ctrl::aux_dac_t>
@@ -382,7 +382,7 @@ void usrp1_dboard_iface::write_aux_dac(dboard_iface::unit_t,
     _codec->write_aux_dac(which_to_aux_dac[which], value);
 }
 
-float usrp1_dboard_iface::read_aux_adc(dboard_iface::unit_t unit,
+double usrp1_dboard_iface::read_aux_adc(dboard_iface::unit_t unit,
                                        aux_adc_t which)
 {
     static const
diff --git a/host/lib/usrp/usrp2/codec_ctrl.cpp b/host/lib/usrp/usrp2/codec_ctrl.cpp
index 4f2cd88bb..7bd19cbe3 100644
--- a/host/lib/usrp/usrp2/codec_ctrl.cpp
+++ b/host/lib/usrp/usrp2/codec_ctrl.cpp
@@ -123,7 +123,7 @@ public:
         this->send_ad9777_reg(0x01); //set the register
     }
 
-    void set_rx_digital_gain(float gain) {  //fine digital gain
+    void set_rx_digital_gain(double gain) {  //fine digital gain
         switch(_iface->get_rev()){
         case usrp2_iface::USRP_N200:
         case usrp2_iface::USRP_N210:
@@ -135,7 +135,7 @@ public:
         }
     }
 
-    void set_rx_digital_fine_gain(float gain) { //gain correction      
+    void set_rx_digital_fine_gain(double gain) { //gain correction      
         switch(_iface->get_rev()){
         case usrp2_iface::USRP_N200:
         case usrp2_iface::USRP_N210:
diff --git a/host/lib/usrp/usrp2/codec_ctrl.hpp b/host/lib/usrp/usrp2/codec_ctrl.hpp
index c8d977a1f..8ca5b4f42 100644
--- a/host/lib/usrp/usrp2/codec_ctrl.hpp
+++ b/host/lib/usrp/usrp2/codec_ctrl.hpp
@@ -54,14 +54,14 @@ public:
      * \param gain from 0-6dB
      */
 
-    virtual void set_rx_digital_gain(float gain) = 0;
+    virtual void set_rx_digital_gain(double gain) = 0;
 
     /*!
      * Set the digital gain correction on the USRP2+ ADC (ADS62P44).
      * \param gain from 0-0.5dB
      */
 
-    virtual void set_rx_digital_fine_gain(float gain) = 0;
+    virtual void set_rx_digital_fine_gain(double gain) = 0;
 
 };
 
diff --git a/host/lib/usrp/usrp2/codec_impl.cpp b/host/lib/usrp/usrp2/codec_impl.cpp
index e417bc340..c52f0f46f 100644
--- a/host/lib/usrp/usrp2/codec_impl.cpp
+++ b/host/lib/usrp/usrp2/codec_impl.cpp
@@ -30,9 +30,9 @@ using namespace boost::assign;
 
 //this only applies to USRP2P
 static const uhd::dict<std::string, gain_range_t> codec_rx_gain_ranges = map_list_of
-                                  ("analog", gain_range_t(0, float(3.5), float(3.5)))
-                                  ("digital", gain_range_t(0, float(6.0), float(0.5)))
-                                  ("digital-fine", gain_range_t(0, float(0.5), float(0.05)));
+                                  ("analog", gain_range_t(0, 3.5, 3.5))
+                                  ("digital", gain_range_t(0, 6.0, 0.5))
+                                  ("digital-fine", gain_range_t(0, 0.5, 0.05));
 
 
 /***********************************************************************
@@ -112,7 +112,7 @@ void usrp2_mboard_impl::rx_codec_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<codec_prop_t>()) {
     case CODEC_PROP_GAIN_I:
     case CODEC_PROP_GAIN_Q:
-        this->rx_codec_set_gain(val.as<float>(), key.name);
+        this->rx_codec_set_gain(val.as<double>(), key.name);
         return;
 
     default: UHD_THROW_PROP_SET_ERROR();
@@ -123,7 +123,7 @@ void usrp2_mboard_impl::rx_codec_set(const wax::obj &key_, const wax::obj &val){
  * Helper function to set RX codec gain
  ***********************************************************************/
 
-void usrp2_mboard_impl::rx_codec_set_gain(float gain, const std::string &name){
+void usrp2_mboard_impl::rx_codec_set_gain(double gain, const std::string &name){
   assert_has(codec_rx_gain_ranges.keys(), name, "codec rx gain name");
 
   _codec_rx_gains[name] = gain;
diff --git a/host/lib/usrp/usrp2/dboard_iface.cpp b/host/lib/usrp/usrp2/dboard_iface.cpp
index 54c1c735c..16bdd040c 100644
--- a/host/lib/usrp/usrp2/dboard_iface.cpp
+++ b/host/lib/usrp/usrp2/dboard_iface.cpp
@@ -44,8 +44,8 @@ public:
         return props;
     }
 
-    void write_aux_dac(unit_t, aux_dac_t, float);
-    float read_aux_adc(unit_t, aux_adc_t);
+    void write_aux_dac(unit_t, aux_dac_t, double);
+    double read_aux_adc(unit_t, aux_adc_t);
 
     void _set_pin_ctrl(unit_t, boost::uint16_t);
     void _set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
@@ -294,7 +294,7 @@ void usrp2_dboard_iface::_write_aux_dac(unit_t unit){
     );
 }
 
-void usrp2_dboard_iface::write_aux_dac(unit_t unit, aux_dac_t which, float value){
+void usrp2_dboard_iface::write_aux_dac(unit_t unit, aux_dac_t which, double value){
     _dac_regs[unit].data = boost::math::iround(4095*value/3.3);
     _dac_regs[unit].cmd = ad5623_regs_t::CMD_WR_UP_DAC_CHAN_N;
 
@@ -317,7 +317,7 @@ void usrp2_dboard_iface::write_aux_dac(unit_t unit, aux_dac_t which, float value
     this->_write_aux_dac(unit);
 }
 
-float usrp2_dboard_iface::read_aux_adc(unit_t unit, aux_adc_t which){
+double usrp2_dboard_iface::read_aux_adc(unit_t unit, aux_adc_t which){
     static const uhd::dict<unit_t, int> unit_to_spi_adc = map_list_of
         (UNIT_RX, SPI_SS_RX_ADC)
         (UNIT_TX, SPI_SS_TX_ADC)
@@ -346,5 +346,5 @@ float usrp2_dboard_iface::read_aux_adc(unit_t unit, aux_adc_t which){
     )));
 
     //convert to voltage and return
-    return float(3.3*ad7922_regs.result/4095);
+    return 3.3*ad7922_regs.result/4095;
 }
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index 6a25a8870..145353c1d 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -138,7 +138,7 @@ usrp2_mboard_impl::usrp2_mboard_impl(
         );
     }
     else {
-        _mimo_clocking_mode_is_master = bool(_iface->peek32(_iface->regs.status) & (1 << 8));
+        _mimo_clocking_mode_is_master = (_iface->peek32(_iface->regs.status) & (1 << 8)) != 0;
     }
     std::cout << boost::format("mboard%d MIMO %s") % _index %
         (_mimo_clocking_mode_is_master?"master":"slave") << std::endl;
diff --git a/host/lib/usrp/usrp2/usrp2_impl.hpp b/host/lib/usrp/usrp2/usrp2_impl.hpp
index 3c937327b..4c85db168 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.hpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.hpp
@@ -132,8 +132,8 @@ private:
     wax_obj_proxy::sptr _rx_codec_proxy;
     wax_obj_proxy::sptr _tx_codec_proxy;
 
-    void rx_codec_set_gain(float, const std::string &);
-    uhd::dict<std::string, float> _codec_rx_gains;
+    void rx_codec_set_gain(double, const std::string &);
+    uhd::dict<std::string, double> _codec_rx_gains;
 
     //properties interface for rx dboard
     void rx_dboard_get(const wax::obj &, wax::obj &);
diff --git a/host/lib/usrp/usrp_e100/codec_ctrl.cpp b/host/lib/usrp/usrp_e100/codec_ctrl.cpp
index 18d9daca0..062c035a4 100644
--- a/host/lib/usrp/usrp_e100/codec_ctrl.cpp
+++ b/host/lib/usrp/usrp_e100/codec_ctrl.cpp
@@ -31,7 +31,7 @@ using namespace uhd;
 
 static const bool codec_debug = false;
 
-const gain_range_t usrp_e100_codec_ctrl::tx_pga_gain_range(-20, 0, float(0.1));
+const gain_range_t usrp_e100_codec_ctrl::tx_pga_gain_range(-20, 0, double(0.1));
 const gain_range_t usrp_e100_codec_ctrl::rx_pga_gain_range(0, 20, 1);
 
 /***********************************************************************
@@ -44,14 +44,14 @@ public:
     ~usrp_e100_codec_ctrl_impl(void);
 
     //aux adc and dac control
-    float read_aux_adc(aux_adc_t which);
-    void write_aux_dac(aux_dac_t which, float volts);
+    double read_aux_adc(aux_adc_t which);
+    void write_aux_dac(aux_dac_t which, double volts);
 
     //pga gain control
-    void set_tx_pga_gain(float);
-    float get_tx_pga_gain(void);
-    void set_rx_pga_gain(float, char);
-    float get_rx_pga_gain(char);
+    void set_tx_pga_gain(double);
+    double get_tx_pga_gain(void);
+    void set_rx_pga_gain(double, char);
+    double get_rx_pga_gain(char);
 
 private:
     usrp_e100_iface::sptr _iface;
@@ -135,19 +135,19 @@ usrp_e100_codec_ctrl_impl::~usrp_e100_codec_ctrl_impl(void){
  **********************************************************************/
 static const int mtpgw = 255; //maximum tx pga gain word
 
-void usrp_e100_codec_ctrl_impl::set_tx_pga_gain(float gain){
+void usrp_e100_codec_ctrl_impl::set_tx_pga_gain(double gain){
     int gain_word = int(mtpgw*(gain - tx_pga_gain_range.start())/(tx_pga_gain_range.stop() - tx_pga_gain_range.start()));
     _ad9862_regs.tx_pga_gain = std::clip(gain_word, 0, mtpgw);
     this->send_reg(16);
 }
 
-float usrp_e100_codec_ctrl_impl::get_tx_pga_gain(void){
+double usrp_e100_codec_ctrl_impl::get_tx_pga_gain(void){
     return (_ad9862_regs.tx_pga_gain*(tx_pga_gain_range.stop() - tx_pga_gain_range.start())/mtpgw) + tx_pga_gain_range.start();
 }
 
 static const int mrpgw = 0x14; //maximum rx pga gain word
 
-void usrp_e100_codec_ctrl_impl::set_rx_pga_gain(float gain, char which){
+void usrp_e100_codec_ctrl_impl::set_rx_pga_gain(double gain, char which){
     int gain_word = int(mrpgw*(gain - rx_pga_gain_range.start())/(rx_pga_gain_range.stop() - rx_pga_gain_range.start()));
     gain_word = std::clip(gain_word, 0, mrpgw);
     switch(which){
@@ -163,7 +163,7 @@ void usrp_e100_codec_ctrl_impl::set_rx_pga_gain(float gain, char which){
     }
 }
 
-float usrp_e100_codec_ctrl_impl::get_rx_pga_gain(char which){
+double usrp_e100_codec_ctrl_impl::get_rx_pga_gain(char which){
     int gain_word;
     switch(which){
     case 'A': gain_word = _ad9862_regs.rx_pga_a; break;
@@ -176,11 +176,11 @@ float usrp_e100_codec_ctrl_impl::get_rx_pga_gain(char which){
 /***********************************************************************
  * Codec Control AUX ADC Methods
  **********************************************************************/
-static float aux_adc_to_volts(boost::uint8_t high, boost::uint8_t low){
-    return float((boost::uint16_t(high) << 2) | low)*3.3/0x3ff;
+static double aux_adc_to_volts(boost::uint8_t high, boost::uint8_t low){
+    return double((boost::uint16_t(high) << 2) | low)*3.3/0x3ff;
 }
 
-float usrp_e100_codec_ctrl_impl::read_aux_adc(aux_adc_t which){
+double usrp_e100_codec_ctrl_impl::read_aux_adc(aux_adc_t which){
     //check to see if the switch needs to be set
     bool write_switch = false;
     switch(which){
@@ -233,7 +233,7 @@ float usrp_e100_codec_ctrl_impl::read_aux_adc(aux_adc_t which){
 /***********************************************************************
  * Codec Control AUX DAC Methods
  **********************************************************************/
-void usrp_e100_codec_ctrl_impl::write_aux_dac(aux_dac_t which, float volts){
+void usrp_e100_codec_ctrl_impl::write_aux_dac(aux_dac_t which, double volts){
     //special case for aux dac d (aka sigma delta word)
     if (which == AUX_DAC_D){
         boost::uint16_t dac_word = std::clip(boost::math::iround(volts*0xfff/3.3), 0, 0xfff);
diff --git a/host/lib/usrp/usrp_e100/codec_ctrl.hpp b/host/lib/usrp/usrp_e100/codec_ctrl.hpp
index 74ce9bd9a..fa66ed983 100644
--- a/host/lib/usrp/usrp_e100/codec_ctrl.hpp
+++ b/host/lib/usrp/usrp_e100/codec_ctrl.hpp
@@ -57,7 +57,7 @@ public:
      * \param which which of the 4 adcs
      * \return a value in volts
      */
-    virtual float read_aux_adc(aux_adc_t which) = 0;
+    virtual double read_aux_adc(aux_adc_t which) = 0;
 
     //! aux dac identifier constants
     enum aux_dac_t{
@@ -72,19 +72,19 @@ public:
      * \param which which of the 4 dacs
      * \param volts the level in in volts
      */
-    virtual void write_aux_dac(aux_dac_t which, float volts) = 0;
+    virtual void write_aux_dac(aux_dac_t which, double volts) = 0;
 
     //! Set the TX PGA gain
-    virtual void set_tx_pga_gain(float gain) = 0;
+    virtual void set_tx_pga_gain(double gain) = 0;
 
     //! Get the TX PGA gain
-    virtual float get_tx_pga_gain(void) = 0;
+    virtual double get_tx_pga_gain(void) = 0;
 
     //! Set the RX PGA gain ('A' or 'B')
-    virtual void set_rx_pga_gain(float gain, char which) = 0;
+    virtual void set_rx_pga_gain(double gain, char which) = 0;
 
     //! Get the RX PGA gain ('A' or 'B')
-    virtual float get_rx_pga_gain(char which) = 0;
+    virtual double get_rx_pga_gain(char which) = 0;
 };
 
 #endif /* INCLUDED_USRP_E100_CODEC_CTRL_HPP */
diff --git a/host/lib/usrp/usrp_e100/codec_impl.cpp b/host/lib/usrp/usrp_e100/codec_impl.cpp
index 6fd44bad3..dde77236c 100644
--- a/host/lib/usrp/usrp_e100/codec_impl.cpp
+++ b/host/lib/usrp/usrp_e100/codec_impl.cpp
@@ -86,12 +86,12 @@ void usrp_e100_impl::rx_codec_set(const wax::obj &key_, const wax::obj &val){
     switch(key.as<codec_prop_t>()){
     case CODEC_PROP_GAIN_I:
         UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
-        _codec_ctrl->set_rx_pga_gain(val.as<float>(), 'A');
+        _codec_ctrl->set_rx_pga_gain(val.as<double>(), 'A');
         return;
 
     case CODEC_PROP_GAIN_Q:
         UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
-        _codec_ctrl->set_rx_pga_gain(val.as<float>(), 'B');
+        _codec_ctrl->set_rx_pga_gain(val.as<double>(), 'B');
         return;
 
     default: UHD_THROW_PROP_SET_ERROR();
@@ -141,7 +141,7 @@ void usrp_e100_impl::tx_codec_set(const wax::obj &key_, const wax::obj &val){
     case CODEC_PROP_GAIN_I: //only one gain for I and Q
     case CODEC_PROP_GAIN_Q:
         UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
-        _codec_ctrl->set_tx_pga_gain(val.as<float>());
+        _codec_ctrl->set_tx_pga_gain(val.as<double>());
         return;
 
     default: UHD_THROW_PROP_SET_ERROR();
diff --git a/host/lib/usrp/usrp_e100/dboard_iface.cpp b/host/lib/usrp/usrp_e100/dboard_iface.cpp
index a5032f86f..6969ac718 100644
--- a/host/lib/usrp/usrp_e100/dboard_iface.cpp
+++ b/host/lib/usrp/usrp_e100/dboard_iface.cpp
@@ -60,8 +60,8 @@ public:
         return props;
     }
 
-    void write_aux_dac(unit_t, aux_dac_t, float);
-    float read_aux_adc(unit_t, aux_adc_t);
+    void write_aux_dac(unit_t, aux_dac_t, double);
+    double read_aux_adc(unit_t, aux_adc_t);
 
     void _set_pin_ctrl(unit_t, boost::uint16_t);
     void _set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
@@ -270,7 +270,7 @@ byte_vector_t usrp_e100_dboard_iface::read_i2c(boost::uint8_t addr, size_t num_b
 /***********************************************************************
  * Aux DAX/ADC
  **********************************************************************/
-void usrp_e100_dboard_iface::write_aux_dac(dboard_iface::unit_t, aux_dac_t which, float value){
+void usrp_e100_dboard_iface::write_aux_dac(dboard_iface::unit_t, aux_dac_t which, double value){
     //same aux dacs for each unit
     static const uhd::dict<aux_dac_t, usrp_e100_codec_ctrl::aux_dac_t> which_to_aux_dac = map_list_of
         (AUX_DAC_A, usrp_e100_codec_ctrl::AUX_DAC_A)
@@ -281,7 +281,7 @@ void usrp_e100_dboard_iface::write_aux_dac(dboard_iface::unit_t, aux_dac_t which
     _codec->write_aux_dac(which_to_aux_dac[which], value);
 }
 
-float usrp_e100_dboard_iface::read_aux_adc(dboard_iface::unit_t unit, aux_adc_t which){
+double usrp_e100_dboard_iface::read_aux_adc(dboard_iface::unit_t unit, aux_adc_t which){
     static const uhd::dict<
         unit_t, uhd::dict<aux_adc_t, usrp_e100_codec_ctrl::aux_adc_t>
     > unit_to_which_to_aux_adc = map_list_of
diff --git a/host/lib/utils/gain_group.cpp b/host/lib/utils/gain_group.cpp
index d577c71bc..07aa21115 100644
--- a/host/lib/utils/gain_group.cpp
+++ b/host/lib/utils/gain_group.cpp
@@ -39,7 +39,7 @@ static bool compare_by_step_size(
  * Get a multiple of step with the following relation:
  *     result = step*floor(num/step)
  *
- * Due to small gain_ting-point inaccuracies:
+ * Due to small doubleing-point inaccuracies:
  *     num = n*step + e, where e is a small inaccuracy.
  * When e is negative, floor would yeild (n-1)*step,
  * despite that n*step is really the desired result.
@@ -66,7 +66,7 @@ public:
     gain_range_t get_range(const std::string &name){
         if (not name.empty()) return _name_to_fcns[name].get_range();
 
-        gain_t overall_min = 0, overall_max = 0, overall_step = 0;
+        double overall_min = 0, overall_max = 0, overall_step = 0;
         BOOST_FOREACH(const gain_fcns_t &fcns, get_all_fcns()){
             const gain_range_t range = fcns.get_range();
             overall_min += range.start();
@@ -78,33 +78,33 @@ public:
         return gain_range_t(overall_min, overall_max, overall_step);
     }
 
-    gain_t get_value(const std::string &name){
+    double get_value(const std::string &name){
         if (not name.empty()) return _name_to_fcns[name].get_value();
 
-        gain_t overall_gain = 0;
+        double overall_gain = 0;
         BOOST_FOREACH(const gain_fcns_t &fcns, get_all_fcns()){
             overall_gain += fcns.get_value();
         }
         return overall_gain;
     }
 
-    void set_value(gain_t gain, const std::string &name){
+    void set_value(double gain, const std::string &name){
         if (not name.empty()) return _name_to_fcns[name].set_value(gain);
 
         std::vector<gain_fcns_t> all_fcns = get_all_fcns();
         if (all_fcns.size() == 0) return; //nothing to set!
 
         //get the max step size among the gains
-        gain_t max_step = 0;
+        double max_step = 0;
         BOOST_FOREACH(const gain_fcns_t &fcns, all_fcns){
             max_step = std::max(max_step, fcns.get_range().step());
         }
 
         //create gain bucket to distribute power
-        std::vector<gain_t> gain_bucket;
+        std::vector<double> gain_bucket;
 
         //distribute power according to priority (round to max step)
-        gain_t gain_left_to_distribute = gain;
+        double gain_left_to_distribute = gain;
         BOOST_FOREACH(const gain_fcns_t &fcns, all_fcns){
             const gain_range_t range = fcns.get_range();
             gain_bucket.push_back(floor_step(std::clip(
@@ -131,7 +131,7 @@ public:
         //fill in the largest step sizes first that are less than the remainder
         BOOST_FOREACH(size_t i, indexes_step_size_dec){
             const gain_range_t range = all_fcns.at(i).get_range();
-            gain_t additional_gain = floor_step(std::clip(
+            double additional_gain = floor_step(std::clip(
                 gain_bucket.at(i) + gain_left_to_distribute, range.start(), range.stop()
             ), range.step()) - gain_bucket.at(i);
             gain_bucket.at(i) += additional_gain;
diff --git a/host/test/gain_group_test.cpp b/host/test/gain_group_test.cpp
index 57560aaa1..53142ef21 100644
--- a/host/test/gain_group_test.cpp
+++ b/host/test/gain_group_test.cpp
@@ -35,17 +35,17 @@ public:
         return gain_range_t(0, 90, 1);
     }
 
-    float get_value(void){
+    double get_value(void){
         return _gain;
     }
 
-    void set_value(float gain){
-        float step = get_range().step();
+    void set_value(double gain){
+        double step = get_range().step();
         _gain = step*rint(gain/step);
     }
 
 private:
-    float _gain;
+    double _gain;
 };
 
 class gain_element2{
@@ -55,17 +55,17 @@ public:
         return gain_range_t(-20, 10, 0.1);
     }
 
-    float get_value(void){
+    double get_value(void){
         return _gain;
     }
 
-    void set_value(float gain){
-        float step = get_range().step();
+    void set_value(double gain){
+        double step = get_range().step();
         _gain = step*rint(gain/step);
     }
 
 private:
-    float _gain;
+    double _gain;
 };
 
 //create static instances of gain elements to be shared by the tests