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FMCOMMS5 - setting crystal frequency

Question asked by liuf_stanford on Jan 4, 2018
Latest reply on Jan 5, 2018 by mhennerich

Setup: ZC702 + FMCOMMS5

 

We swapped the default 40MHz +/-25ppm crystal on the FMCOMMS5 (RXO3225M) for a 48MHz +/- 5ppm one via some very careful soldering. However, when we attempt to update the frequency by setting echo 48000000 > /sys/bus/iio/devices/iio:device1/xo_correction, the board automatically reverts to 40000000. Setting it to a smaller value such as 40000100 works just fine.

 

Is there a way to set the crystal frequency of the FMCOMMS5 beyond minor adjustments?

 

Thanks,

Frank

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