I'm interested in whether it would be possible to use the ADALM-PLUTO time-of-arrival localization. This requires a very stable clock. I wonder whether it will be possible to feed in an external reference clock? In the revision-B schematics, it looks like there is no connector or jumper to switch from the built-in 40MHz oscillator to an external clock.
Also, if I do feed the clock from an external source (even if this involves removing the 40MHz oscillator), how difficult will it be to switch from 40MHz to 10Mhz? I see that the AD9363 does support 10MHz clocks, but will it is reasonably easy to configure the firmware for this clock frequency?
Thanks, Sivan Toledo, Tel-Aviv University
I'd like to use external 10MHz reference clock.I have made the changes according post:
I have rebuild Pluto with changed zynq-pluto-sdr.dtsi (clock-frequency = <10000000>;)
and update it successfully.
I am running modified ad9361-iiostream.c from examples to output 1GHz SW When external reference is 10MHz I see about 678MHz SW on spectrum.But when I external frequency is 40MHz there is exactly 1GHz SW.
What could be wrong?Do I need to make another changes in sources.