[time-nuts] Coarse adjustment of PRS-10 with 5335A

2013-09-01 Thread Paul
(In light of a recent conversation) My initial proposition is to use the mean function to close in on a coarse frequency adjustment. Initially starting at 100 and then moving to 1,000 samples. I'm using a Firefly I for the external time base. I doubt I'll have a plan for fine frequency adjustme

[time-nuts] Datum / Efratom MFTD Distribution units?

2013-09-01 Thread Dan Rae
Does anyone have any details, schematics etc., on these units? I have two racks with various modules, both set up for multiple 5 MHz and 1 PPS distribution and would like to modify if possible to 10 MHz. I have found two versions of the MBF RF output unit, one with series tuned outputs as wel

[time-nuts] Tboltmon and linux

2013-09-01 Thread Paul Alfille
I want to report that tboltmon works well on linux under Wine. I'm running fedora 19, 64-bit (so the executable is wine64) and tboltmon version 2.6 Getting a com port pointing to a USB serial adapter is it's own project, but quite doable. Paul Alfille _

Re: [time-nuts] HP53132A's LSD question

2013-09-01 Thread Bob Camp
Hi A multi turn (maybe 10 turn) pot and a few resistors can give you all you need to drive the OCXO once it's warmed up. If you want to investigate right at 10 MHz, you probably need two 10 turn pots. Bob On Aug 31, 2013, at 9:05 PM, Hui Zhang wrote: > Hello Bob: > That's good idea, I wil

[time-nuts] Speaking of 5370s

2013-09-01 Thread Mark Sims
The slide switches on the 5370's use gold plated springs that slide on a PC board. They are located such that the fan fills them with dust and dirt. Failures are very common, but easy to fix. You need to disassemble the switch board and clean everything.

Re: [time-nuts] Phase modulation question

2013-09-01 Thread Magnus Danielson
On 09/01/2013 01:00 AM, John Miles wrote: > Normally any higher-order sidebands are ignored when dealing with PM. You > can think of it as NBFM with a very low modulation index -- all of the > "intelligence" is in the first sideband. > > Put another way, the modulation index for FM is the peak fre

Re: [time-nuts] Speaking of 5370s

2013-09-01 Thread Christopher Brown
If they were it would be a non issue, know how to do the basic fixes for those and have multiple donors. The bad switches on my 5370B are the slide switches on the right, start sep/com, atten, etc. This unit went through a warehouse style surplus dealer and took impact damage, nothing major to th