> Hi! > > Taking a 10MHz signal from a rubidium clock to an external device it is better > to use 0.5-1Vrms sine wave or TTL? A 75 ohm coaxial cable will be used with > just 1 meter long. In any case the receiver will be made around a unbuffered > gate with self biasing (it seems that the 74AC type has better phase noise > performance, as stated on http://www.ham-radio.com/sbms/LPRO-101.pdf. > Circuit behaviour with other series like VHC, LV are unkown, at least for > me!). Anyone have experience on EMI/RFI issues and phase noise > performance under these circumstances? >
I'd bring the 10 MHz sine out of the rubidium standard and convert it at the destination, if that's what you're asking. There wouldn't be much upside to moving the line receiver or comparator to the source end of the cable. If you want to see some quantified measurements of the 74AC04 buffer, check out http://www.ke5fx.com/ac.htm . The ones in the LPRO-101.pdf document don't appear to be true residual measurements (plus, their suggested circuits leave some room for improvement.) -- john, KE5FX Miles Design LLC _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
