Forum: GNU Radio Re: B200 clock calibration

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Robert Light (Guest)
on 2014-05-15 11:49
(Received via mailing list)
Hi, In case we use on-board oscillator , how is ADF4001 configured? Does
CP (pin20) output affect the VCXO_Tune ? Is it possible to control this
chip directly from the command line?
Nick Foster (Guest)
on 2014-05-15 17:18
(Received via mailing list)
The ADF4001's output charge pump is tristated when not locking to an
external reference, and a resistor divider holds the VCTCXO's tuning
at 1/2 Vcc. The B200 hardware can use the AD9361's low-speed DAC to
the VCTCXO's tuning input via AUXDAC1 if R118 is populated; however,
functionality is not supported by the B200 UHD driver.

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