[time-nuts] HP-10811AB-OCXO interface questions

[Steve Longcor]

Missing body of my previous message (I hope):

As others have said, there are a number of versions of the 5328A 
oscillator support board.  Yours looks like it is from a MIL version of 
the 5328A with the 10811 OCXO.  Attached is the most-likely schematic, 
which is from the manual for the 5328AH99 TRI-SERVICE COUNTER found in 
Keysight  obsolete products:

https://www.keysight.com/en/pd-5328AH99%3Aepsg%3Apro-pn-5328AH99/tri-service-counter?pm=PL

Steve

On 9/1/2020 10:24 PM, Manfred Bartz wrote:
> Hi all,
>
> I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on.
> The OCXOs came with an interface board HP 05328-20027, see attached
> pictures.
>
> Questions:
> 1. Is it worth keeping the interface board?
>      a. If yes, does anyone have the schematic and the data on the ICs?
>      b. What is that TO220 device?  and
>      c. why is it mounted on a standoff on the back of the PCB?
> 2. Any advice/caution on matching the OCXO output impedance?
> 3. Any recommendation for a (>= 4-ch) distribution amplifier?
> 4. Any advice on a low jitter comparator for further digital processing,
> e.g. for a 1pps signal?
>
> Thanks and 73
>
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