Glenn Gundlach wrote:
I agree with Prong on this one. I've worked in repair and broadcast
for 35 years. Unless you have a compelling reason to change it, leave
it alone. Of course, this assumes it's good stuff to begin with like
Fluke and Tek.

A few years ago I got stuck with the Telequipment scope, the last junk
available. It was sadly out of calibration. I whipped up a few voltage
dividers and took other stuff and spent an hour calibrating the vertical
channels and horizontal timebase. I got my work done. The head tech
wanted to know how, and I told him, and he hit the ceiling, ran to the
other room, grabbed the scope and sent it out for calibration.

He was strangely silent when the scope came back. When I asked him
outright about it, he didn't look up from his work when he mumbled
something about the vertical being 0.4% off reference.

Mission-critical? Send it out. Need for extreme precision? Send it out.
But if 2-5% is good enough and you've got some time and imagination,
you can get it awfully close to where you need it.

--
"...global warming is an apocalyptic faith whose preachers demand sacrifices
of others that they find far too painful for themselves."
-- Andrew Bolt, in Australia's Herald Sun