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External clock RSPDuo and RSP2

Posted: Tue Oct 30, 2018 5:51 pm
by MTG
From the RSPDuo introduction V3
The reference clock circuitry has been significantly enhanced and can now interface to a GPSDO
delivering a 0-3v output without any interface circuit. It is capable of operating as a clock
master to other RSPduos or RSP2s
and will also operate as a clock slave when using a RSP2 as a
clock master. In tests, we find that we can ‘hot swap’ between an internal and external clock
without hanging the MSi2500, which is not possible on the RSP2.
The output from GPSD0 (and presumably the mini version?) can be directly applied to the RSPDuo and can feed to another RSP2 for example. Ordinarily the RSP2 needs an attenuator for this input. Is the attenautor on the RSP reference clock input still required?

What output setting is used on the GPSDO?

Re: External clock RSPDuo and RSP2

Posted: Sun Feb 17, 2019 5:18 pm
by W1AMW
This is actually a separate question on the same topic. I understand that the external reference for the RSP2 must be at 24 MHz. Since there are now many inexpensive GPSDO's at 10 MHz on eBay and elsewhere, is it possible to modify the SDRuno software to accept a 10 MHz reference clock?

Re: External clock RSPDuo and RSP2

Posted: Sun Feb 17, 2019 5:42 pm
by Tech_Support
Hello W1AMW,
No, this is a hardware limitation not software.