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mole42uk · 24th May 2021, 11:57 am

I'm using a 1MHz output to sync the Marconi 2955 Radio Test Set. Fortunately, that doesn't appear to care too much about the waveform so I'm using the 50Ω square-wave for that. The OCXO is 10MHz which I divide down to 100kHz to phase-sync with the 100kHz down from the ublox receiver. That has been solid on the breadboard for two weeks - I monitor the frequency control voltage at the OCXO and it has been exactly the same every time I've looked.

I do want a 1MHz sine wave-ish output on the front panel for ad-hoc use. I guess that 50Ω again would be useful, especially as all my BNC cables are 50Ω....

24th May 2021, 11:57 am	#7
mole42uk Nonode Join Date: Aug 2010 Location: Resolven, Wales; and Bristol, England Posts: 2,609	Re: 1MHz output impedance query? I'm using a 1MHz output to sync the Marconi 2955 Radio Test Set. Fortunately, that doesn't appear to care too much about the waveform so I'm using the 50Ω square-wave for that. The OCXO is 10MHz which I divide down to 100kHz to phase-sync with the 100kHz down from the ublox receiver. That has been solid on the breadboard for two weeks - I monitor the frequency control voltage at the OCXO and it has been exactly the same every time I've looked. I do want a 1MHz sine wave-ish output on the front panel for ad-hoc use. I guess that 50Ω again would be useful, especially as all my BNC cables are 50Ω.... __________________ Richard Index: recursive loop: see recursive loop Last edited by mole42uk; 24th May 2021 at 12:13 pm.