When you start TimeLab, which mode does the PM6680 show? FREQ A or TIME A-B?
On Tue, Jul 3, 2012 at 5:46 PM, cfo <xne...@luna.dyndns.dk> wrote: > On Tue, 03 Jul 2012 14:34:08 +0000, cfo wrote: > > > I just got a PM6680/016 - Std. Osc + GPIB + 1.3Ghz -Chan.C The best my > > budget could afford :-) > > > > I would like to try out John's Timelab. But only have a > > Prologix-Ethernet GPIB adapter , no USB version. > > > > I was wondering if anyone can confirm that Timelab would work on a > > PM6680 , using a Prologix-Eth ? > > > Well (blush) > > I can ansver my own question here. > Timelab autodetects the Prologix-Eth (with mac & ip) , and lists it below > all the COMM-Ports. Nice work John ... > > So all i had to do was to select the detected Prologix , and set the > PM6680 GPIB address. > > I'm acquiring data now , although not very impressive. > > I run my Tbolt signal through a Video Dist-Amp (400Mhz bw) , to get > 6-channels. So i know the 75ohm imp there , but it's not been an issue so > far. > > I feed the PM6680 Ext-Ref and Chan-A via a Dist-Amp output on a BNC-T. > And have put a BNC-T on Chan-A with a 50ohm terminator on it. > I have Chan-A set to 1Mohm , as i terminate the input via the BNC-T on > Chan-A. > > But i wonder if the PM6680 Ext-Ref input already terminates with 50-ohm , > and that could be the issue ?? > > The counter flickers occasionally in the last digit between 0 , 1 and 9 > > And Timelab says ADEV is 9.442-E-6 on T=1000 Secs. > > I would have expected something better .... > > LH says the ADEV is Osc ADEV is 5.442-E-13 on 10000 Secs > > I wonder where i have FSCK'ed up , or is a Tbolt on Ext-Ref & the same > signal on Chan-A supposed to show that ? > > > CFO - (Feeling very T-Nut Beginner now) > > > > > _______________________________________________ > 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.