Yes, that has always been my question. I had my 2465B calibrated a few years ago by another forum member and have relied on that to provide reasonably accurate relative measurement comparisons with all of my other (uncalibrated) 'scopes, but seeing as it is all relative to the ultimate source of the standard instruments used, it's kind of a guess. I'm always reminded of the Latin phrase "Quis custodiet ipsos custodes" which means, more or less, "who guards the guards".
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Re standardizers, one only needs the one that matches the bandwidth of the 'scope being calibrated. IIRC, a -01 is sufficient for all 400 MHz and 500 MHz 'scopes; the -00 is for 250 MHz 'scopes and the -02 is for, basically, the 7104. TekWiki is your friend.
$77 for a standardizer is a really good deal, assuming it works (and maybe even if it doesn't word but can be repaired).
On 5/1/2019 6:15 PM, Richard Solomon wrote:
And who calibrates the Calibrator ?
And so, on it goes ....
73, Dick, W1KSZ
On Wed, May 1, 2019 at 3:13 PM David Berlind <firstname.lastname@example.org> wrote:
With four 7000 series scopes in my lab, I've been patiently waiting for
a 067-0587-00,01, or 02 signal standardizer for about a year now and I
finally grabbed one today. They've been going for pretty big money (worth
more than the scope itself) but I managed to snag it for $77 (with
shipping) off of eBay.
My one concern of course is that it works and doesn't need some form of
I will soon find out.
On Wed, May 1, 2019 at 11:13 AM Harvey White <email@example.com>
On Tue, 30 Apr 2019 12:47:26 -0700, you wrote:choose
Hi All,or so scopes around here. I have a multitude of Tek 7000 frames to
I need one, good working scope to get started on repairing the other 30
from but I think the 7904 (or 7904A) is a good place to start. Oncethat's
working + cal'ed I can at least troubleshoot and maybe repair theothers.
Where can I get one professionally calibrated in the greater Detroitarea? I can drive a fair distance, but I'm scared to ship. I've had two
7934's, a 7834, and a 7704A crushed in separate shipping mishaps.
Can't help you there, I'm in the southeast. However...
Also...which plug ins are recommended to cal for building my goldenscope? I have a collection...
The typical plugins for a 7904 (and that's a good choice, IMHO) are at
least one if not two 7A26, and a 7B92A (which I happen to like). If
you want the flexibility of two sweep plugins, the 7B80 and 7B85 will
do. If you have a 7103/4 and a 7B10 and 7B15, you could use them but
the sweep is not calibrated at the highest frequencies, but those
could be moved over to the 7103/4 when needed.
For things you'd want:
067-0587-01 signal standardizer. The 01 is intended for 500 mhz
scopes, the 00 is for lower bandwidth, and the 02 is for the 1GHz
bandwidth scopes. Needed to keep the mainframes all agreeing with
each other as well as provides some nice linearity and gain signals.
You could use the 00, but it wouldn't allow you to check out the
frequency response to the limit of the scope's bandwidth for higher
PG506/TG501 SG503/SG504 TM500 plugins that provide calibration
signals for vertical and timebase checking, as well as frequency
response. Those will do any scope. The signal standardizer is
specifically for 7000 series mainframes.
You could also go with a CG501 (TM500) or a CG5001 (TM5000) module
with the appropriate frame. Note that the CG series may need a
specific head to supply the right signals. Those heads may be
difficult to find.
My favorite (depending) setup in a 7904 is a 7A26 (or 7A24 if I need
more bandwidth and can tolerate a 50 ohm input plugin), a 7D12 with an
M2 (sampling) module, a 7D15 counter, and a 7B92A sweep.