[volt-nuts] Wavetek 1281 - Selfcal Module

Todd Micallef tmicallef at gmail.com
Thu Oct 29 12:28:30 EDT 2015

I recently picked up a 1281 that is throwing a couple of errors. While
researching the problem, I looked for the SelfCAL description and did not
see anything conclusive. I will pull out my schematics and see if there are
any references to a particular module. I was under the impression they were
using the second LTZ1000 reference module for this function but was never

I have the full repair manuals of the 1281 from Manuals Plus before they
stopped selling. I will look up anything I can find this evening.


On Thu, Oct 29, 2015 at 11:59 AM, Frank Stellmach <
frank.stellmach at freenet.de> wrote:

> Hello,
> I'm comparing different "AUTOCAL" techniques, like in the HP3458A, Fluke
> 5440A, 5720A, and have recently discussed  the 34465A/34470A "ACAL" feature
> with Keysight.
> The Datron 1281 had a SelfCal feature, which is briefly described as
> relying on a special SelfCal module inside this instrument. This should
> enable the instrument to make a complete (?) recalibration possible,
> between the annual calibration dates, or during room temperature changes,
> maybe comparable to the 3458A ACAL.
> The Fluke 8508A is obviously based upon the Datron 1281, but does not have
> this SelfCAL feature & module.
> Now, here's my question:
> Does any volt-nuts here, have an idea, what's hidden behind this 1281
> SelfCAL module, and how its capability is, also regarding its specification
> improvement?
> Are there any schematics or descriptions available?
> Thanks - Frank
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