[time-nuts] HP 105B Problem?
J. Forster
jfor at quik.com
Sun Aug 9 00:32:16 UTC 2009
Hi again,
I do have a HC manual for an older 105B (bought about 30 years ago) but
can't access it at the moment.
> The 105B is one of the products that Agilent sold to Symmetricom which
> means that they don't have any info on it. Of course, Symmetricom has
> no info on the 105B on their site.
Try CALLING them (telephone) on Monday and talk to an Engineer, NOT their
sales department.
I haven't talked to Artek Media, but
> they don't list it.
eMail Dave.
> That's why I repeated the test with the signal generator - to see how it
> responded to an improperly terminated cable.
It will depend on the cable Z, source Z, and termination Z.
> The old manual doesn't list an impedance either. However, the responses
> of the 1 MHz and 100 KHz outputs are consistent with a 50 ohm
> impedance. The 5 MHz looks more like about 7 ohms based on an
> open-circuit reading of 86 and a terminated reading of 76. The circuit
> check is basically a peak-reading meter. A 43 ohm resistor in series
> with each output might be very interesting. But I'd rather find a
> schematic first.
Try it. You won't break anything.
>> I'm not so sure.
>>
> I'm not at all sure. :-)
>
> Ed
Best,
-John
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