If you ask Mini-Circuits about the details of their amps that are specified as to having high reverse isolation, they have a pad in the circuit. I don't know whether it is in the input or the output. Maybe both, looking at a ZFL-2AD specs.
>From a Mini-Circuits data sheet it says: active directivity (dB) = isolation >(dB) - gain (dB) Rob NC0B Sent from my iPad > On Mar 26, 2016, at 6:00 PM, "Bruce Griffiths" <[email protected]> > wrote: > > > >> On Saturday, March 26, 2016 09:30:30 PM Rob Sherwood. wrote: >> You cannot add the directivity and gain. Doesn't work that way. Rob, NC0B. >> >> Sent from my iPad > Minicircuits would disagree with that and its their amplifier. > > Bruce >> >>> On Mar 26, 2016, at 2:00 PM, "jimlux" <[email protected]> wrote: >>> >>> >>> >>> Consulting the time-nuts hive mind here.. >>> >>> I'm looking for off the shelf connectorized amplifiers with very good >>> reverse isolation for doing things like intermod measurements (e.g. 2 >>> signal generators followed by amps/pads into a combiner) and phase noise >>> measurements for a digital receiver. >>> >>> 1-100 MHz kind of frequency range.. >>> >>> I've used ZFL-500LN (30dB gain, 27 dB directivity in the data sheet, which >>> I interpret as 57dB reverse) , ZX60-4016 (really more of a microwave amp, >>> and not so hot reverse wise.. 25 dB) >>> >>> I'm not particularly cost constrained, so a higher power amp (which also >>> reduces distortion products from the amp) followed by pads is always an >>> alternative. _______________________________________________ >>> 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. >>> >>> >>> >>> -- >>> If this email is spam, report it to >>> https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg2NjQ0MTI4Mjpyb >>> 2JAbmMwYi5jb206ZGVsaXZlcmVk >> _______________________________________________ >> 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. > > > > -- > If this email is spam, report it to > https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg2NjQ2NDcxNTpyb2JAbmMwYi5jb206ZGVsaXZlcmVk > _______________________________________________ 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.
