[time-nuts] 5370A clock buffer board jitter/noise?

I started getting noise spikes of up to 500ps on my 5370 the other day. When I switch to external clock and use the PRS-45A, the noise goes away. In fact, the noise issue is way better than with the 10811. I swapped in a different 10811, and the noise doesn't seem to have returned, but it

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Hey Wayne, I said "you should read more than 1 Mohm", but if R215 is interrupted, of course. Antonio ___ 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

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

>From: Hal Murray > >iovane wrote: >> are you sure your LPRO actually locks? You say you have measured 10.000 MHz >> but you don't mention the other decimals. Some years ago I characterized >> some LPROs of mine, and from my notebook I take that, on one sample for >>

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Hi I’ve always found that pin 9 (EFC monitor) gave you a pretty good idea of the lock status. Bob > On Mar 22, 2016, at 8:43 AM, Wayne (gmail) wrote: > > The BITE signal is the only way to to know if it has a lock... > > Wayne > >> On Mar 22, 2016, at 4:37 AM, Bob

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

I don't currently have a way to accurately measure the frequency of the output, but my assumption is that oscillator is running, but not locked. I did some more poking around and found that the crystal volts monitor (pin 9) starts low (around 4 volts) and then slowly rises as the unit runs. It

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Perfect !! The swept voltage should not reach 14V, but only about 12.5V and then reverse. Your upper comparator is faulty. Check resistor R215 on the PCB bottom face, 100K SMD. You could chech it on board, and probably you will read more than 1 Mohm. I bet the trouble is there. R215 is near the

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

There's a plot of the unlocked sweep of an FE-5690 at the bottom of http://febo.com/pages/oscillators/rubes/ I think the LPRO is pretty similar. John On 3/22/2016 2:02 PM, Hal Murray wrote: time-nuts@febo.com said: are you sure your LPRO actually locks? You say you have measured 10.000 MHz

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Hi, you can check the behaviour of the XTAL V MON voltage to get some useful information. It should move up and down during the searching of a lock, and then it should stop at a certain value when lock is achieved. Bye Luca iw2lje Il martedì 22 marzo 2016, Wayne (gmail)

[time-nuts] Datum StarLoc II and LH

Heather can log the binary packets that it sees.Use keyboard command "oj" to toggle packet logging mode. Then use the "wlw" command to open the log file. Let it run for a couple of minutes. Close the log file with "wls".

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

time-nuts@febo.com said: > are you sure your LPRO actually locks? You say you have measured 10.000 MHz > but you don't mention the other decimals. Some years ago I characterized > some LPROs of mine, and from my notebook I take that, on one sample for > instance, prior to lock the frequency

[time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Try iy with a pull-up. I have seen LPROs with an open collector type of output. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and

[time-nuts] Datum StarLoc II and LH

Hello, Today I was trying to use LH Software with Datum "StarLoc II" GPSDO. While LH is not supported that beast, it could read and decode some TSIP messages coming from it. Basically, StarLoc II sending 8F-AB and 8F-AC for every second. Here is the result:

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Wayne, are you sure your LPRO actually locks? You say you have measured 10.000 MHz but you don't mention the other decimals. Some years ago I characterized some LPROs of mine, and from my notebook I take that, on one sample for instance, prior to lock the frequency swept up and down between

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

The BITE signal is the only way to to know if it has a lock... Wayne > On Mar 22, 2016, at 4:37 AM, Bob Camp wrote: > > Hi > > There are probably a dozen or more things that contribute to the BITE output. > It could be > a regulator out of range. It also could be the VCXO

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

Hi There are probably a dozen or more things that contribute to the BITE output. It could be a regulator out of range. It also could be the VCXO nearing tune limit. If the unit locks up and seems to work, I’d ignore it and move on. Bob > On Mar 21, 2016, at 9:42 PM, Wayne Holder

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

>Da: Tom Miller > >- Original Message - >From: "Wayne Holder" > > >>I have a surplus LPRO-101 that seems to power up OK. The power draw starts >> at 1.7 Amps and then, after a few minutes, drops down to 600 mA, or so

Re: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low

- Original Message - From: "Wayne Holder" To: "Discussion of precise time and frequency measurement" Sent: Monday, March 21, 2016 9:42 PM Subject: [time-nuts] LPRO-101 BITE (~lock) Signal Always Low I have a surplus LPRO-101 that seems