Jerry has described the situation fairly well. You take pot luck, and the Chinese supplier does not know which are which.
Out of four units I have, two are remote controllable, one is fixed at (reasonably close to) 10MHz, while the fourth had no output at all. I've since discovered that this last unit has a 1pps output, and I was also able to recover a useful 60MHz output from it by digging inside. If you end up with a fixed ~10MHz unit, it's still useful as a portable reference. It doesn't matter what the exact frequency is, so long as it's stable and repeatable (within your measurement requirements) and has a nice low ageing rate. Murray ZL1BPU _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
