Re: [time-nuts] OT: NTP server questions

What do you need to do? What precision is required and how many clients will you be serving. For most "normal" uses you don't need a special purpose server system. A $600 notebook PC and any GPS unit with a serial connection and a copy of Linux or BSD. On Mon, Nov 29, 2010 at 11:36 AM, Robert

[time-nuts] Cheap GPS with USB, RS232, BLuetooth and PPS :)

Just joined the list and noticed the discussion about finding a cheap USB GPS with PPS on it. You might like to check these out... http://cgi.ebay.com/MG1613S-Bluetooth-RS232-USB-UART-GPS-Module-Demo-Board-/230555471914? or buy direct from them here... http://www.sureelectronics.net/category.

Re: [time-nuts] 3586A HQ PDF Manual available

Just looked at the fluke 6060 and looks good. The 3586 should be even more interesting considering its size. Thanks Roberto On Mon, Nov 29, 2010 at 9:40 PM, Chuck Harris wrote: > Hi Roberto, > > Your scan is beautiful. Huge, but beautiful. I am very interested. > > -Chuck Harris > > > > After

Re: [time-nuts] 3586A HQ PDF Manual available

Hi Roberto, Your scan is beautiful. Huge, but beautiful. I am very interested. -Chuck Harris After a few evenings working on it, I'm now considering (not) doing the same with the two volumes of the service manual. Is there any interest? ___ time

Re: [time-nuts] 3586A HQ PDF Manual available

Have you checked what Dave at ArtekMedia has? He does really good work and sells his scans pretty cheaply. FWIW, if Dave has it, you'd be better off working at McDonalds than redoing it. Just my $0.02 worth. YMMV, -John === > Hi all, > > I've been lucky enough to get a 3586A i

[time-nuts] 3586A HQ PDF Manual available

Hi all, I've been lucky enough to get a 3586A in good shape, with no manuals. I found the operating manual at Agilent's site (poor quality) and the (good quality) scans at KO4BB, made by someone unknown to me. I went thru the trouble of correcting rotation, borders and levels of each of those

[time-nuts] OT: NTP server questions

Hi guys, I'm looking to buy an NTP server for a field deployable server system. I currently have a Symmetricom SyncServer S250 which does more than I need. I am considering buying an S200 (same as the S250 but without the ability to connect to an external frequency standard). My gut feeling is

Re: [time-nuts] beats was Re: If there a FAQ

Have you ever tried humming while watching a propeller? The strobe effect is fascinating. My flight instructor thought that I was crazy until he tried it. Mike - AA8K On 11/29/2010 09:51 AM, jimlux wrote: if one has a voltmeter (or total power detector, like your ear), hearing low frequenc

Re: [time-nuts] If there a FAQ

Google is still your friend :) For those so inclinde, you can get to Daniel Kleppner's Physics Today article via the Smithsonian/NASA Astrophysics Data System: Clicking on the Full Text Article link will get you where you want to be and let

[time-nuts] Anyone using Silicon Forrest's LPRO-GPSDO?

I have an LPRO-GPSDO from Silicon Forrest. I just got a Trimble Tbolt to check against the Rb clock. As far as I can tell, by this comparison, watching beats of 3rd harmonics of the two clocks on a radio in AM-detection mode to keep receiver instabilities out of the equation, the Rb clock i

Re: [time-nuts] If there a FAQ

You don't need hearing ability for low pitches. As the beat frequency gets lows it it sounds like the volume is being pulsed. Like something is playing with the volume knob once per second. It is the same say you tune a musical instrument.You listen for volume modulation. The two pitches eit

[time-nuts] beats was Re: If there a FAQ

jmfranke wrote: Accurate Zero Beating, another perspective. The waxing and waning rate is determined solely by the beat between the WWV transmission and the unknown source. It is now easy to reliably adjust the unknown, or its harmonic, to within a fraction of a Hertz of the WWV transmissi

Re: [time-nuts] If there a FAQ

Accurate Zero Beating, another perspective. When trimming an oscillator so it or one of its harmonics zero beats with WWV or other standard frequency transmission, much comment has been made over the ability to approach true zero beat. When the harmonic is directly zero beat, the stated accura

Re: [time-nuts] If there a FAQ

Oh Dear Hal how the old skills are lost when everything comes with digits on it :-)) You put the BFO on and you do a 3 signal beat, which can be set to 0.1 Hz quite easily by listening to the "swell". This is 1 in 10^8 at 10MHz !! Ah I am showing my age again :-)) Alan G3NYK - Original Message

Re: [time-nuts] If there a FAQ

Hal wrote: How do you get down to "a couple Hz"? I thought most (young?) ears dropped out at about 20 Hz and I expect lots of radios chop off more than that just to get rid of noise. Beating of the received carrier and the oscillator being calibrated results in full or partial cancellation o

Re: [time-nuts] If there a FAQ

albertson.ch...@gmail.com said: > What low cost GPSes should I look at? These days, most low cost GPS units are USB, but those don't have a PPS signal. You may be able to find the PPS signal on the module in there if you take it apart. These are the only low cost ones I know of with PPS. Bot

Re: [time-nuts] If there a FAQ

> I know I can zero-beat it by ear and get within a couple Hz out of 10MHz. > That is better then 1E-6 simply by hand, ear and screwdriver. No computer. How do you get down to "a couple Hz"? I thought most (young?) ears dropped out at about 20 Hz and I expect lots of radios chop off more than