Need. Help for Stanford Research FS275 1oMhz rubibium clock. Test calibration

[KIKIWILLYBEE]

Hello,
please, I courteously ask for your help with the calibration of a
Stanford research FS275 benchtop clock.

I acquired used on eBay, for audio use, to have a 10 MHz world clock clock, which can distribute its 10 MHz signal, for the synchronization of audio devices: switch 802.3, CD player, USB interface to I2s lvds.....

The latter does not lock, and it is not at 10.oooooo MHz.

Full newbie,
I have no idea of the process to. bring this clock to its nominative frequency. and locking.

I have a fluke 68xxx + ocxo in frequency Metre, a Hantek 400 MHz DSO, and a pc connected in RS232 connected in usb. to this clock.

And it's not how to proceed, I also have to equip in addition to a gps clock.,
I have another time reference at 10 MHz, low phase noise at -121dB, at 1 hz.

Thank you very much...
Willy ;-).

[max-bit]

Do I understand correctly that the FS725 does not go into a LOCKED state ?

(this model is 725 or 275?)

[KIKIWILLYBEE]

Hi sir ,

Yess , no locked state  (only one time ..?)
, and of course not really at 10.ooooooo. MHz

Thanx sir,
Yours,
W ;-)

[max-bit]

One more question is the 725 or 275 model because I can't find the 275 version. And ... more the specification etc.

Unfortunately, the causes of "no lock" can be very many, from prosaic to very difficult to repair (e.g. damage to the Rubidium source)

As I do not know what model it is, you have any documentation (diagram, service manual) ?

[5065AGuru]

Manual is available at https://www.thinksrs.com/downloads/man.html

cheers,

Corby