[time-nuts] About HP10544A
bruce.griffiths at xtra.co.nz
Sat Mar 7 21:11:31 EST 2009
Tom Van Baak wrote:
>> I have been able to find schematics of the 10544A but not a service manual.
>> Is there a service manual available?
> I'll look for something like a service manual. I know I have some
> interesting info in the 10544. When I find it I'll update the page.
> One thing you could do is look at hp op/service manuals of
> instruments (e.g., frequency counters) made in the late 70's
> and see how they integrated the 10544 into their design. This
> will give you hints on both input power and output buffering.
> I know *late* model 5245L counters used the 10544A oscillator.
> Perhaps others in the group can provide other examples and
> then you can head off to the online manual sites and grab the
> info you need from the PDF files.
No 5245 manuals on Agilent site nor the agilent ftp site nor BAMA site.
The HP5370A also used a 10544A as an optional high stability timebase OCXO.
The reference buffer PCB is close to the 10544A socket.
The reference buffer consists of a series string of 3x 1/3 MC10216 ECL
The reference input pin uses a 1k resistor in series with 10pF connected
to the input of the first ECL line receiver.
This buffer is somewhat crude, but nevetheless has adequate performance
for its intended application.
More information about the time-nuts