); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Surely the only impedance we`re concerned with is that at DC, since it`s only an adjustment. The input would look like 200K, in series with a constant voltage source [zero resistance ] of 6.4 Volts. Cheers!,..........................................Don C.
----- Original Message ----- From: "Bruce Griffiths" <[EMAIL PROTECTED]> To: "Don Collie" <[EMAIL PROTECTED]>; "Discussion of precise time and frequency measurement" <[email protected]> Sent: Monday, October 29, 2007 9:01 PM Subject: Re: [time-nuts] EFC Input pin impedance for the HP 10544Aand10811-6011 > Don Collie wrote: >> So, what *is* the input impedance? >> Cheers,...............................................Don. >> >> > It depends on the frequency. > > Network is complex 20k in series with 100-200pF plus another 20K to > signal ground plus a few pF shunt C from the varicap to ground (a few > pF) for the 10544A as a first approximation. > For the 10811 100K in series with the 100pF varicap plus a few pF in > paralle with 100K to signal ground. > > Bruce _______________________________________________ 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.
