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+========================================================================
+UHD - USRP-B1XX Series Application Notes
+========================================================================
+
+.. contents:: Table of Contents
+
+------------------------------------------------------------------------
+Specify a Non-standard Image
+------------------------------------------------------------------------
+UHD will automatically select the USRP B-Series images from the installed images package.
+The image selection can be overridden with the **--fpga=** and **--fw=** device address parameters.
+
+Example device address string representations to specify non-standard images:
+
+::
+
+    fpga=usrp_b100_fpga_firmware.bin
+
+    -- OR --
+
+    fw=usrp_b100_fw_firmware.ihx
+
+------------------------------------------------------------------------
+Changing the Master Clock Rate
+------------------------------------------------------------------------
+The master clock rate of the USRP embedded feeds both the FPGA DSP and the codec chip.
+Hundreds of rates between 32MHz and 64MHz are available.
+A few notable rates are:
+
+* **64MHz:** maximum rate of the codec chip
+* **61.44MHz:** good for UMTS/WCDMA applications
+* **52Mhz:** good for GSM applications
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Set 61.44MHz - uses external VCXO
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+To use the 61.44MHz clock rate, the USRP embedded will require one jumper to be moved,
+and X4 must be populated with a 61.44 MHz oscillator.
+
+* **J15** is a three pin header, move the jumper to (pin1, pin2)
+* **357LB3I061M4400** is the recommended oscillator for X4
+
+**Note:** See instructions below to communicate the desired clock rate into UHD.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Set other rates - uses internal VCO
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+To use other clock rates, the jumper will need to be in the default position.
+
+* **J15** is a three pin header, move the jumper to (pin2, pin3)
+
+To communicate the desired clock rate into UHD,
+specify the a special device address argument,
+where the key is **master_clock_rate** and the value is a rate in Hz.
+Example:
+::
+
+    uhd_usrp_probe --args="master_clock_rate=52e6"
+
+------------------------------------------------------------------------
+Hardware setup notes
+------------------------------------------------------------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Front panel LEDs
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The LEDs on the front panel can be useful in debugging hardware and software issues.
+The LEDs reveal the following about the state of the device:
+
+* **LED A:** transmitting
+* **LED B:** fpga loaded
+* **LED C:** receiving
+* **LED D:** fpga loaded
+* **LED E:** reference lock
+* **LED F:** board power
+
+------------------------------------------------------------------------
+Miscellaneous
+------------------------------------------------------------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Available Sensors
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The following sensors are available;
+they can be queried through the API.
+
+* **ref_locked:** clock reference locked (internal/external)