Hi Angus,
thanks for the hint. I read through this fairly long thread - the
baseline seems to be: Replace the caps.
Best regards,
Matthias
Am 23.05.2017 um 21:44 schrieb Angus:
Hi,
If you've not already looked, it would be worth checking on the
EEVblog since there were some discussions there on faults in these
units - particularly the capacitor and lamp voltage issues.
One of the temperature controllers could be a little unstable too.
Angus.
On Tue, 23 May 2017 09:40:26 +0200, you wrote:
Hello Time-Nuts,
i´ve been playing with some Rbs recently.
I compared two LPFRS-01 to a PRS-10. One seems to behave quite well (compared
to the specs given here:
http://www.spectratime.com/uploads/documents/isource/iSource_LPFRS%20Spec.pdf)
- short term stability specs are met), the other one shows quite some phase
ripple (appx. 1 ns RMS with a frequency around 0.007 Hz) which spoils ADEV in
the 60 - 200s range, very similiar to the typical GPSDO bump. Long term
stabilty is OK.
Unfortunatly I didn´t find any schematics on the web. Has anyone encountered a
similiar problem with this unit? Any idea were this might come from? My first
guess would be a problem in the control loop locking the VCXO to the Rb, but I
have no clue which time constants are used in the PLL.
Any hints are appreciated.
Regards,
Matthias
_______________________________________________
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.
