The more important parameter is Ibias, the input current, vs. the input
capcitance.
Neither Input Resistance, nor input bias current, nor input capacitance
are specified for the 3457A.
Input current is on the order of a few pA, up to 20pA, and input
capacitance, I would guess, several dozen pF, or you'll have to study
the CLIP, if there's a bigger cap in the front end.
Even this would be 100nF, you can calculate, that the input will charge
quickly with open input jacks, and then will actuate the 100:1 divider
by relais, if 3V were exceeded. The 10MOhm then will quickly discharge
the input cap again.
Frank
_______________________________________________
volt-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
