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authorJosh Blum <josh@joshknows.com>2012-07-17 16:32:59 -0700
committerJosh Blum <josh@joshknows.com>2012-07-17 16:32:59 -0700
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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)