Hi Dave; In a more detailed response to your question, i do not know a great deal about the 3457A but in recent years I have had multiple 3458A's
on my bench at a time and I have found on those instruments the AD drift can very often be greater then the reference drift. A-Cal will correct the drift but raw data then has a saw tooth appearance. Both A3 board and reference board can vary greatly in unit meeting "Spec". I have copied a fellow Volt-Nut will who has spent a fair amount of time characterizing both the 3458A and 3457A and may have more insight on the 3457A drift and linearity. If you want to play with a few 3458A ref boards send me an address I am not sure what the current eBay type price is but if you want to keep one or both sell them for a better price in a small payback for your continuing contributions to the Time/Volt-Nuts forums. Cheers; Thomas Knox Sr Test and Measurement Engineer Ascent Concepts and Technology 4475 Whitney Place Boulder Colorado 80305 1-303-554-0307 [email protected] ________________________________ From: volt-nuts <[email protected]> on behalf of Dr. David Kirkby (Kirkby Microwave Ltd) <[email protected]> Sent: Saturday, September 23, 2017 8:45 AM To: Discussion of precise voltage measurement Subject: [volt-nuts] Power consumption of 3458A reference board / fitting one in a 3457A I've got two different, but not totally unrelated questions. 1) Does anyone know what is the power consumption of the 3458A reference board? I was thinking of getting one, boxing it up with a battery, that allowed it to keep running without mains power. I would like to know the energy storage the batteries would need to keep it running for 2 days. 2) Would there be any point fitting a similar board, with an LTZ1000A in a 3457A 6.5 digit meter? Would it be practical? I wonder if the drift on the 3457A's reference is significant, and so a LTZ1000A would be a worthwhile upgrade. Or is the main drift not the voltage reference, and so such an "upgrade" would be a total waste of time/money? Dave _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts volt-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts> www.febo.com volt-nuts is a low volume, high SNR list for the discussion of precise voltage measurement and related topics. To see the collection of prior postings to the list ... and follow the instructions there. _______________________________________________ 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.
