[time-nuts] PTS 250

[Rex]

Does anyone have information on the PTS 250 Synthesizer?

I bought one on eBay. Seems to work pretty well, except the OCXO is not
great. I have a hard time even setting it below about 5x10^-9, but
output seems accurate and functional if I use external 10 MHz.

Do cal and service manuals exist for these things? My searches haven't
found any.

Does anyone have the pin-out for the external BCD 50-pin connector? I
found a document for a PTS 160 and the programming pins seem to match as
far as the 10 MHz digit, but the PTS 250 must have more pins that are
used for the 100 MHz digit. Anyone know how the high order is programmed
through the 50-pin connector?

Thanks for any information you can share.