Hi! In *"Changing the Master Clock Rate"* ( https://files.ettus.com/manual/page_usrp_b200.html#b200_mcr ) I see this:
*[...] The clock rate can be set to any value between 5 MHz and 61.44 MHz [...]* But I found that to be false, and able to lower the *master_clock_rate* down to *220 kHz*: uhd_usrp_probe --args="master_clock_rate=220e3" linux; GNU C++ version 4.9.2; Boost_105500; UHD_003.009.HEAD-0-g43639b7a -- Detected Device: B200 -- Operating over USB 3. -- Initialize CODEC control... -- Initialize Radio control... -- Performing register loopback test... pass -- Performing CODEC loopback test... pass -- Asking for clock rate 0.220000 MHz... -- Actually got clock rate 0.220000 MHz. -- Performing timer loopback test... pass I also tried lowering it to 2 MHz inside a working tx application (with an external demodulator) and went fine. Hope it helps. Bye!
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