My boss at Tektronix, Bob Ragsdale, quoted the "Pulse Amplifier Designer's Law," which he said he learned at the Rad Lab in Livermore:
"If it's big enough, it's too slow. If it's fast enough, it's too small. If it's big enough and fast enough, its got rumdiddlies on the top." Best, Dick Moore > ------------------------------ > > Message: 9 > Date: Tue, 01 Dec 2009 20:00:58 -0500 > From: [email protected] (Mike S) > Subject: Re: [time-nuts] OT: Power level reference > To: [email protected], Discussion of precise time and frequency > measurement <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii"; format=flowed > > At 07:00 PM 12/1/2009, J. Forster wrote... >> Scopes tend to have non-flat frequency response. I'd consider a >> precision >> load and something like an HP 3400A True RMS meter for up to a hunderd >> MHz >> or so. > > You have to know your equipment. I have a Tek 485 350 MHz analog scope, > so I'm confident it's flat into VHF (at least beyond 100 MHz). I've > verified it exceeds the 350 MHz spec (i.e. < 3 db down @ 350 MHz) with > a tunnel diode pulser. > > > > > > ------------------------------ > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 65, Issue 4 > **************************************** _______________________________________________ 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.
