Hi Rick As far as I'm aware this is pretty much a copy of the HP original which used a Fujitsu, or similar, MB510-PF prescaler, so a sort of "what you see is what you get" situation:-) Regards Nigel GM8PZR In a message dated 09/11/2013 00:03:58 GMT Standard Time, rich...@karlquist.com writes:
On 2013-11-08 15:49, gandal...@aol.com wrote: > > At 1000 MHz, the highest frequency I can generate right now, I've > measured > the channel 3 input sensitivity as -50dBm with a sinusoidal signal. > > Regards > > Nigel > GM8PZR > This high sensitivity is probably a bad thing, not a good thing. It is indicative of a dynamic divider. For a frequency counter prescaler, you want a static divider, such as the HP5386 used. Dynamic dividers make errors if the signal being measured has a broadband noise floor or sufficiently high spurs at any frequency. Rick Karlquist N6RK _______________________________________________ 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. _______________________________________________ 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.