[time-nuts] 5370A vs 5370B
lists at rtty.us
Wed Mar 10 12:33:49 UTC 2010
Yes indeed, the period was measured with the two channels in the com mode and the reference into one of them. I hadn't considered the trigger offset issues and was expecting something sub-100 ps rather than 500 ps. Obviously I need to spend some "quality time" with this beast. Now I gotta figure out how to change the gate time :}......
It sounds like my oscillator buffer board is going to get butchered pretty soon.
On Mar 9, 2010, at 11:30 PM, Mark Sims wrote:
> 99.95 ns is a typical number for the period reading at minimum gate time. Set the gate time to 1 sec. My 5370A shows 99.999 999 9650 +/- 50 at 1 sec gate time.
>> From my experience it can take at least a couple of months of continuous operation for the oscillator in an unused 5370 to stabilize its drift rate. Once stabilized, the 10544A's in the 5370A seem to be much LESS drifty than the 10811's in the 5370B.There are three mods that I do to all the 5370s that cross my path. First I replace the fan with a 12V 120 ma brushless DC fan driven by the 10V supply. Second I drill a hole in the top of the case over the oscillator tuning control. Third, I add a switch to the oscillator buffer board to disable that STUPID oscillation detected LED that spew put 5 MHz noise all over creation. I also disassemble and clean those slide switches on the front panel.
> Hotmail: Trusted email with Microsoft’s powerful SPAM protection.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts