5 files changed, 24 insertions, 10 deletions
diff --git a/host/lib/usrp/b200/b200_io_impl.cpp b/host/lib/usrp/b200/b200_io_impl.cpp
index e423285ce..d6df726af 100644
--- a/host/lib/usrp/b200/b200_io_impl.cpp
+++ b/host/lib/usrp/b200/b200_io_impl.cpp
@@ -175,7 +175,6 @@ void b200_impl::update_tick_rate(const double new_tick_rate)
     }
 }
 
-
 double b200_impl::coerce_rx_samp_rate(rx_dsp_core_3000::sptr ddc, size_t dspno, const double rx_rate)
 {
     // Have to set tick rate first, or the ddc will change the requested rate based on default tick rate
@@ -186,6 +185,14 @@ double b200_impl::coerce_rx_samp_rate(rx_dsp_core_3000::sptr ddc, size_t dspno,
     return ddc->set_host_rate(rx_rate);
 }
 
+#define CHECK_BANDWIDTH(dir) \
+    if (rate > _codec_ctrl->get_bw_filter_range(dir).stop()) { \
+        UHD_MSG(warning) \
+            << "Selected " << dir << " bandwidth (" << (rate/1e6) << " MHz) exceeds\n" \
+            << "analog frontend filter bandwidth (" << (_codec_ctrl->get_bw_filter_range(dir).stop()/1e6) << " MHz)." \
+            << std::endl; \
+    }
+
 void b200_impl::update_rx_samp_rate(const size_t dspno, const double rate)
 {
     boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
@@ -194,6 +201,7 @@ void b200_impl::update_rx_samp_rate(const size_t dspno, const double rate)
     my_streamer->set_samp_rate(rate);
     const double adj = _radio_perifs[dspno].ddc->get_scaling_adjustment();
     my_streamer->set_scale_factor(adj);
+    CHECK_BANDWIDTH("Rx");
 }
 
 double b200_impl::coerce_tx_samp_rate(tx_dsp_core_3000::sptr duc, size_t dspno, const double tx_rate)
@@ -214,6 +222,7 @@ void b200_impl::update_tx_samp_rate(const size_t dspno, const double rate)
     my_streamer->set_samp_rate(rate);
     const double adj = _radio_perifs[dspno].duc->get_scaling_adjustment();
     my_streamer->set_scale_factor(adj);
+    CHECK_BANDWIDTH("Tx");
 }
 
 /***********************************************************************
diff --git a/host/lib/usrp/common/ad9361_ctrl.cpp b/host/lib/usrp/common/ad9361_ctrl.cpp
index 9c17a582d..f3ab36247 100644
--- a/host/lib/usrp/common/ad9361_ctrl.cpp
+++ b/host/lib/usrp/common/ad9361_ctrl.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2012-2014 Ettus Research LLC
+// Copyright 2012-2015 Ettus Research LLC
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -133,12 +133,6 @@ public:
     {
         boost::lock_guard<boost::mutex> lock(_mutex);
 
-        //warning for known trouble rates
-        if (rate > ad9361_device_t::AD9361_RECOMMENDED_MAX_CLOCK_RATE) UHD_MSG(warning) << boost::format(
-            "The requested clock rate %f MHz may cause slow configuration.\n"
-            "The driver recommends a master clock rate less than %f MHz.\n"
-        ) % (rate/1e6) % (ad9361_device_t::AD9361_RECOMMENDED_MAX_CLOCK_RATE/1e6) << std::endl;
-
         //clip to known bounds
         const meta_range_t clock_rate_range = ad9361_ctrl::get_clock_rate_range();
         const double clipped_rate = clock_rate_range.clip(rate);
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
index c3eb5fb9d..8737837b3 100644
--- a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
+++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
@@ -79,8 +79,9 @@ int get_num_taps(int max_num_taps) {
 
 const double ad9361_device_t::AD9361_MAX_GAIN        = 89.75;
 const double ad9361_device_t::AD9361_MAX_CLOCK_RATE  = 61.44e6;
-const double ad9361_device_t::AD9361_RECOMMENDED_MAX_CLOCK_RATE = 56e6;
 const double ad9361_device_t::AD9361_CAL_VALID_WINDOW = 100e6;
+// Max bandwdith is due to filter rolloff in analog filter stage
+const double ad9361_device_t::AD9361_RECOMMENDED_MAX_BANDWIDTH = 56e6;
 
 /* Program either the RX or TX FIR filter.
  *
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.h b/host/lib/usrp/common/ad9361_driver/ad9361_device.h
index a242f35e9..0c7a7e4f7 100644
--- a/host/lib/usrp/common/ad9361_driver/ad9361_device.h
+++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.h
@@ -132,8 +132,8 @@ public:
     //Constants
     static const double AD9361_MAX_GAIN;
     static const double AD9361_MAX_CLOCK_RATE;
-    static const double AD9361_RECOMMENDED_MAX_CLOCK_RATE;
     static const double AD9361_CAL_VALID_WINDOW;
+    static const double AD9361_RECOMMENDED_MAX_BANDWIDTH;
 
 private:    //Methods
     void _program_fir_filter(direction_t direction, int num_taps, boost::uint16_t *coeffs);
diff --git a/host/lib/usrp/e300/e300_io_impl.cpp b/host/lib/usrp/e300/e300_io_impl.cpp
index fa4915ed1..dadfb71e9 100644
--- a/host/lib/usrp/e300/e300_io_impl.cpp
+++ b/host/lib/usrp/e300/e300_io_impl.cpp
@@ -91,12 +91,21 @@ void e300_impl::_update_tick_rate(const double rate)
     }
 }
 
+#define CHECK_BANDWIDTH(dir) \
+    if (rate > _codec_ctrl->get_bw_filter_range(dir).stop()) { \
+        UHD_MSG(warning) \
+            << "Selected " << dir << " bandwidth (" << (rate/1e6) << " MHz) exceeds\n" \
+            << "analog frontend filter bandwidth (" << (_codec_ctrl->get_bw_filter_range(dir).stop()/1e6) << " MHz)." \
+            << std::endl; \
+    }
+
 void e300_impl::_update_rx_samp_rate(const size_t dspno, const double rate)
 {
     boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
         boost::dynamic_pointer_cast<sph::recv_packet_streamer>(_radio_perifs[dspno].rx_streamer.lock());
     if (my_streamer)
         my_streamer->set_samp_rate(rate);
+    CHECK_BANDWIDTH("Rx");
 }
 
 void e300_impl::_update_tx_samp_rate(const size_t dspno, const double rate)
@@ -105,6 +114,7 @@ void e300_impl::_update_tx_samp_rate(const size_t dspno, const double rate)
         boost::dynamic_pointer_cast<sph::send_packet_streamer>(_radio_perifs[dspno].tx_streamer.lock());
     if (my_streamer)
         my_streamer->set_samp_rate(rate);
+    CHECK_BANDWIDTH("Tx");
 }
 
 /***********************************************************************