Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-17 Thread Magnus Danielson
Great news! :) Cheers, Magnus On 08/17/2015 09:33 AM, Ole Petter Ronningen wrote: Fantastic, just what I needed. Thank you! On Sun, Aug 16, 2015 at 9:16 PM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: Ole, I checked with a former Pendulum employee, and free off memory, he recommen

Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-17 Thread Ole Petter Ronningen
Fantastic, just what I needed. Thank you! On Sun, Aug 16, 2015 at 9:16 PM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: > Ole, > > I checked with a former Pendulum employee, and free off memory, he > recommend trimming up the 100 MHz until Error 2 does not show. Sensing it > directly can

Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-17 Thread Magnus Danielson
David and others, I will have to come back on the details. However, I'll give you the overview from the top of my head. The one calibration value kept in CMOS backup is the length of the calibration pulse. This can be altered over GPIB. The program will sweep over the value range (don't know

Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-16 Thread davidh
Magnus, I have a few of these counters and would love to see the details of the calibration process you mention. Cheers. david On 17/08/2015 5:16 AM, Magnus Danielson wrote: Ole, I checked with a former Pendulum employee, and free off memory, he recommend trimming up the 100 MHz until Er

Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-16 Thread Tom Knox
. Cheers; Thomas Knox > Date: Sun, 16 Aug 2015 21:16:22 +0200 > From: mag...@rubidium.dyndns.org > To: time-nuts@febo.com > CC: mag...@rubidium.se > Subject: Re: [time-nuts] Troubleshooting Fluke PM6681 > > Ole, > > I checked with a former Pendulum employee, and free

Re: [time-nuts] Troubleshooting Fluke PM6681

2015-08-16 Thread Magnus Danielson
Ole, I checked with a former Pendulum employee, and free off memory, he recommend trimming up the 100 MHz until Error 2 does not show. Sensing it directly can be difficult, FET-probe essentially mandatory. Indirectly a 10 MHz is possible. A problem is that trimming with the hood off causes a

[time-nuts] Troubleshooting Fluke PM6681

2015-08-16 Thread Ole Petter Ronningen
Hello. I have a Fluke PM6681 that has issues. When I got it, it gave results all over the place, but after adjusting the 100Mhz multiplier-chain, it seems to be much better; at least I get std.deviationwell within spec using a split pulse to input A and B, 100 samples. I'd like to get it professio