Dr. Anton T. Squeegee wrote in
:

In article m,
(known to some as Too_Many_Tools) scribed...

I have a well stocked test bench at home containing a range of
analog, digital and RF test equipment as I am sure most of you also
do.

snippety

I could post pictures... ;-)

Well the question I have is how do you handle the calibration of your
equipment? What do you use for calibration standards for resistance,
voltage, current and frequency?

Hmm. Excellent question.

For frequency, I actually have three different references, all
GPS-
locked. One is my primary reference, an HP Z3801, as retired from a
cellphone site. The second and third ones are both combination clocks
and freq-references, one from Trak Systems (now Trak Microwave) and
the other from Odetics/Zypher. All three use a very stable OCXO that
is constantly disciplined by the GPS receiver.

Long-term accuracy is on the order of 1E10 -11th or so. In other
words, about as good as you can get without being NIST certified.

I don't have good primary voltage or current references as yet.
That's on the 'Acquire' list for scrounging this year. For resistance,
simple Pomona plugs with 0.01% tolerance resistors work pretty well
for 2-wire. For anything more, I will probably have to rent one of the
Fluke all-in-ones.

I'm just beginning to gather the goodies I need for calibrating
my
O-scope collection. That will eventually consist of Tektronix leveled
sine-wave generators, and one of their CG5xxx series calibration
generators.

Keep the peace(es).



TEK sold their TM500/5000 line to TEGAM years ago,they may still make some
calibration products. www.tegam.com

--
Jim Yanik
jyanik
at
kua.net