I think I have tried pretty much every suggestion everyone has given me, and
probed every pin I was told to. If I had a digital storage scope life would
be much easier, but I'm doing the best I can with what I got.
Still trying to track down my problem, it seems like the counter at U4 is
resetting
Checked both U1-2 & U2-1, I am getting the 5 MHz / 0 to 5V square wave. It's
not the nicest looking, but my counter reads it fine. Maybe this could be a
problem?
http://www.rabel.org/archives/Images/Misc/5MHz_Square.jpg
Yes, U3-15 has the GPS PPS pulse, I can't see it on my scope but I can see
th
Here
http://www.rt66.com/~shera/setup_notes.html
In the troubleshooting section there's a note about A mysterious
problem.
I had this issue, I Wonder could it be related to your issue? In any
case the fix does not hurt so worth a try?
On Wed, 2007-01-17 at 17:05 -0600, Jason Rabel wrote:
> Ch
Checked that today, getting 315.5KHz (A&A Board - P3 pins 1&2 jumpered).
I pulled all the chips, just to make sure I didn't have any bent/broken
pins. Reflowed every pin on the board so there would be no doubt in my mind
that there were any bad joints. Replaced chips Same problem I've been
hav
aren't getting a good clock
into the phase counter reset.
Hope this helps,
Richard
- Original Message -
From: "Jason Rabel" <[EMAIL PROTECTED]>
To: "'Discussion of precise time and frequency measurement'"
Sent: Monday, January 15, 2007 1:28 PM
Subject
at's all this about resistors? You can't achieve
>>lock if the board has no input from the OXCO. Are you sure
>>the GPS input
>>is OK?
>>
>>Did that help?
>>
>>Bill Hawkins
>>
>>
>>-Original Message-
>>From: [EMAIL
nt: Monday, January 15, 2007 6:58 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Brooks Shera GPS Controller Help
>
> First, take your OXCO, heat it up, and use just a pot for the 0 to 6
> volt control range. Find out what contro
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Jason Rabel
Sent: Monday, January 15, 2007 4:28 PM
To: 'Discussion of precise time and frequency measurement'
Subject: [time-nuts] Brooks Shera GPS Controller Help
You guys might have noticed a little bit I posted in another topic, b
You guys might have noticed a little bit I posted in another topic, but I
figured it's time I started my own now that I have the setup all hooked back
up and running again.
I'm having trouble getting the controller to lock the OCXO. The phase
reading only goes between about 10 - 155... Nowhere nea
