Hey Rob! Yeah, there was a LPRO Rb option on that board and you are remembering correctly. The main thing was a dc-dc converter to get the right voltage (24vdc?). Then, I believe we just selected the external clock and cranked the filter constant up to 1000 and I think that's it. I can't quite remember how it was hooked up, I think maybe a couple SMB mounts inside, one for clock and one for control voltage. Let me know if you want more info.
-----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Rob Kimberley Sent: Tuesday, June 29, 2010 6:53 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Datum TS-2100 Rubidium I seem to remember that we did a field upgrade on a TS2100 to add an LPRO when I was selling Datum stuff in the UK in the mid/late 90's. It did bolt on the chassis, with a small PSU mod board, and I believe a firmware upgrade included. Unfortunately I don't have any info on file any more. If Greg Dowd at Symmetricom is lurking on this site, maybe he could point you in the right direction. Rob Kimberley -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Julien Goodwin Sent: 29 June 2010 12:27 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Datum TS-2100 Rubidium On 28/06/10 21:36, Julien Goodwin wrote: > Up next is to convert the darn thing to Rubidium, like it was meant to > be when I purchased it (insert rant here). OK so the pinout vaguely matches, the TS-2100 is *very* twitchy on the alarm circuits, even a 1Mohm scope (well, it's 1M in theory, cheap Rigol[1]) tripped it to reboot a few times. But where in the world are you supposed to *put* the darn LPRO oscillator, it's too tall to fit above the board, and there doesn't look to be enough room between the back of the front panel and the main board. I'm also not sure about the power supply thing, seeing only the single post to time-nuts about it. I'd love photos, but I'd assume that most people that have one it sits in a rack running. Thanks, Julien 1: Actually 'tis one of the 50Mhz units "hacked" to 100Mhz operation, a very nice Tek 11k analog scope was reserved, but the seller appears to not want my business going silent after several prods. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.