[time-nuts] Stanford RS620 Acting up
Thanks for all the responses. Well it was even simpler than I expected, All I had to do was a cold reset followed by an autocal. the unit now will power-up with the display active. Apparently it was not a hardware error at all. I now want to calibrate the internal 10 MHz reference. I read the cal procedure several times. I need to set the value of calbyte 4 (and 50 to minimize offset). I found and enabled the cal jumper. I accesses the cal menu. I displayed and can edit the calbyte 0 but I can't seem to figure out how to navigate to the next calbyte. How do I select the calbyte to operate on? Eric Haskell ___ 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.
Re: [time-nuts] Stanford RS620 Acting up
Use the Sample Size switches Juerg Koegel 2012/10/16 Eric Haskell eric_hask...@hotmail.com: Thanks for all the responses. Well it was even simpler than I expected, All I had to do was a cold reset followed by an autocal. the unit now will power-up with the display active. Apparently it was not a hardware error at all. I now want to calibrate the internal 10 MHz reference. I read the cal procedure several times. I need to set the value of calbyte 4 (and 50 to minimize offset). I found and enabled the cal jumper. I accesses the cal menu. I displayed and can edit the calbyte 0 but I can't seem to figure out how to navigate to the next calbyte. How do I select the calbyte to operate on? Eric Haskell ___ 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.
Re: [time-nuts] Stanford RS620 Acting up
I had similar difficulties with my SR620. I rewired the cables to the power switch so that the out position now switches the power on and the in position switches the power off. This has worked for me in the last 4 years. Ulrich Bangert -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert LaJeunesse Gesendet: Mittwoch, 10. Oktober 2012 23:06 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] Stanford RS620 Acting up The SR620 I worked on was unused for a long time, and would not turn on. Seems the power switch was oxidized and would not self-clean. Had to unmount it so I could use chemical cleaners without getting any residue on the case or PCB. IIRC the whole front panel needed to be pulled to do that (not too difficult). Beware the SR620 is slightly unusual in that the transformer is not switched, but rather the DC supplies are. Bob L. From: Eric Haskell eric_hask...@hotmail.com To: Time Nuts time-nuts@febo.com Sent: Wed, October 10, 2012 4:59:51 PM Subject: [time-nuts] Stanford RS620 Acting up My RS620 became difficult to start ... ___ 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] Stanford RS620 Acting up
My RS620 became difficult to start some time back with me having to press the power button several times. Now it has been off a few months and will not turn on at all. The fan starts but no indicators. If I press on and off several time I saw the numeric LEDs flash briefly a few time but the unit does not come up. I suspect that there is a bad electrolytic cap in the power supply somewhere. Before I get into it I wanted to ask if this is a common failure mode with a common fix? Regards, Eric Haskell ___ 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.
Re: [time-nuts] Stanford RS620 Acting up
The SR620 I worked on was unused for a long time, and would not turn on. Seems the power switch was oxidized and would not self-clean. Had to unmount it so I could use chemical cleaners without getting any residue on the case or PCB. IIRC the whole front panel needed to be pulled to do that (not too difficult). Beware the SR620 is slightly unusual in that the transformer is not switched, but rather the DC supplies are. Bob L. From: Eric Haskell eric_hask...@hotmail.com To: Time Nuts time-nuts@febo.com Sent: Wed, October 10, 2012 4:59:51 PM Subject: [time-nuts] Stanford RS620 Acting up My RS620 became difficult to start ... ___ 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.
