Hi Taka, I made an 1:8 multiplexer with TE HF3 relays. They are specified up to 3 GHz, but the 'tree'-design has log2(8) = 3 levels - i.e. the signal always passes through three relays. in practice I got around 1 GHz -3dB bandwidth, which I think is OK for 1PPS http://www.anderswallin.net/2018/05/mux-in-a-box/ I should measure and document the 1PPS rise-time/shape before and after the multpliexer..
If someone knows of a significantly better relay than the TE HF3 at similar price then that would be an improvement.. Anders On Sun, Jul 7, 2019 at 12:01 AM Taka Kamiya via time-nuts < [email protected]> wrote: > I am trying to come up with a viable design to encase TICC along with > 10MHz -> 1 pps converter. My plan is to share the input connector and > switch in/out the converter. > > 1 pps, although technically a 1Hz signal, rise time and duration is > awfully short on some sources. I'm sure constituent signal will go way > into RF range. I am not capable of calculating this. But, that means I > really have to treat it as an RF signal, correct? Otherwise, slower rise > will cause error as it will cross the threshold later than initiation of > the pulse. Question is, how careful do I need to be? > My plan is to use two 18GHz microwave relay per channel to bypass/place-in > the converter. I know this would be OK but am I over-doing this? I also > have a miniature relay in DIP size but I'm afraid it may not be > sufficient. There is not a frequency spec, and consistency may be an issue. > Advise, please? > > --------------------------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
