[time-nuts] Datum 1000B OXCO

[Corby Dawson]

Hi,

The data sheet for the 1000B is available on the Symmetricom website.

The pinout is not given.

Here is the pinout.

1- Electronics return
2- Control voltage in -10 to +10 VDC
3- Coarse tune in voltage
4- +12VDC reference out, coarse tune hot
5- Oven return
6- Oven monitor
7- +24VDC oven power
8- +24VDC electronics power
9- Case ground

On some units the internal coarse control is disabled and the pot is
brought out to the instruments rear panel to allow adjustment without
disassembling the unit!

You can tell if this is the case  if wires are connected to the
mainframes connector on pins 1 3 and 4 and finding the pot at the other
end.

These 1000B have pins 3 and 4 as shown.

In this case pins 1 and 4 connect across the pot and the wiper goes to
pin 3. The pot on the 1000B will not have any effect.

Hope this helps.

Corby Dawson
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