Hi Folks, Well my 5370B purchased off ebay arrived from the US in perfect condition. It passed all the operator checks (all well within spec) and the only issue being that the internal 10811 oscillator was running a tad slow. A quarter of a turn with the screwdriver fixed that.
Having played with it for a day or so I have a few questions. I was wondering if there was an FAQ anywhere? My first issue was powering it up. It said on the socket on the back 110-240V and I nearly just plugged it in out of habit (as you can do with modern power supplies). I decided to read the manual, however and was so glad I did. 240V into it without flipping the little board over and changing the fuse would have been a disaster! I didn't have a 1.25 amp fuse but a 1 amp worked ok. Second issue was opening the cover! It wasn't in the manual and I couldn't find it anywhere on the net. I figured it out in the end (undo the screw at top rear and remove the top two feet and slide the top back). My top didn't slide easily and so it wasn't obvious. My third issue I'm not sure how it happened and I think it was a bug. After lots of prior fiddling I started taking measurements between two 1 PPS readings from two different GPSDOs (Thunderbolt and Z3815A) and it was telling me the difference was 980 nsec. Checking the waveforms on an oscilloscope said it should have been of the order of 3 nsec. This had me stumped for ages until I clicked the DSP REF button and it showed -977! This was obviously from previous fiddling but I thought the SET REF button would be lit if REFERENCE was non zero. I haven't been able to repeat this. Any ideas? Motto here is always click CLR REF to be sure. Another thing I don't understand is to do with frequency measurements. Gating with 0.01, 0.1 or 1 second gives good results for a reference 10 MHz, but why does measuring the same frequency with the 1 PERIOD set and say 1000 samples not give good results? Thanks in advance, Jim _______________________________________________ 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.