The 7562A has a crest factor of 5:1, which is between
the 10:1 you can get with a thermal converter and the 3:1
you could get with the early analog multipliers. I don't
know which it is.
Dave Wise
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-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of David C.
Partridge
Sent: Wednesday, September 23, 2009 9:47 AM
To: hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] 7562A Log Voltmeter/Converter
Thanks Dave,
I also found a write up about it in the October 1968 HP
Journal. I suspect
that the oven on the A5 board is for one (or both) arms of
the thermocouple
used for the RMS conversion. I've had one of them on for
about 1 hour, and
the Zero set has moved around a *lot* as it warmed up, but
the oven doesn't
appear appreciably warm to touch ??? but the PSU - now that
DOES run pretty
darn warm!
Accuracy +/- 0.5dB in AC mode (over most of the range 0.5Hz -
100kHz), +/-
0.25dB in DC mode
You're right they will make very nice project boxes :-)
Dave
