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

[Charles Steinmetz]

Manfred wrote:

> 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.

The 05328-20027 "Oscillator Support Assembly" (also, the 05328-60027 
"Oscillator Support Assembly") was used to interface an HP 10544A OCXO 
(predecessor to the 10811 OCXO) to an HP 5328A frequency counter.  It 
contains two voltage regulators, an amplifier chain to enable the 
external standard input on the 5328, and a 10:1 divider to generate a 
1MHz output in addition to the 10MHz output.

A similar "Oscillator Support Assembly", HP 05328-60038, was used to 
interface an HP 10811 OCXO to the HP 5328A frequency counter.

There was also an earlier "Oscillator Support Board", HP 05328-60018, 
which contains only the voltage regulator.

Schematics for all of the oscillator support boards can be found in 
various generations of the HP 5328A service manual, which are easily 
found on line.

Best regards,

Charles