External reference inputs are definitely not all '50-ohms.' 'Learned the hard way.
You need to read the specs on each piece of equipment. Input impedances will vary all over the map, even within the HP line. -Don ---- Hal Murray <[email protected]> wrote: > > [email protected] said: > > I have a FlexRadio 1500, Racal 1992 counter, HP 3586, Advantest U3641, and > > Gigatronics 6061A daisy-chained off my Thunderbolt. Don't throw out those > > BNC T connectors. > > I thought most boxes would have an internal 50 ohm terminator so at first, > I'm a bit surprised that it works. > > If cables are short (which is not hard at 10 MHz), it would just be a > resistive divider. If the source impedance is low, it's just more work for > the driver. If the source includes 50 ohms, that's a 5:1 (1/6) divider so it > probably works if the receivers are reasonably sensitive. > > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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. _______________________________________________ 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.
