Hi Bob.
My configuration is:
- HP 10811-60111 10 Mhz oscillator
- Trimble Resolution-T GPS card
- VE2ZAZ controller board
- homebrew power supplies
- RS232 switchable between GPS and VE2ZAZ controller
- little e-bay puck GPS antenna on the top of an 8' post outside my
window.
I did get the software for the Resolution-T from the Trimble
site and did a site survey.
My software settings for the VE2ZAZ controller board are:
S: 00E1 (a few seconds more than one hour)
F: 01 (for this osc the fine adj is not useful)
L: B1
H: 10
W: c8
N: 0A
O: 01
X: 02
M: 01
I've had the thing running for about a year.
It took a while to figure out a bad solder joint in
my oscillator that made the DAC voltage ineffective.
Since it's been running right I have had the opportunity
to compare it to a cesium standard and I'm happy.
There is also a mailing list for the VE2ZAZ controller
where you might find more info:
http://mailman.qth.net/mailman/listinfo/gps_standard
Chris
w0ep
On 7/12/2013 10:32 AM, Bob Stewart wrote:
> Hi Chris,
>
> Thanks for the feedback. Do you happen to know the parameters you have setup
> for yours? Just wondering what you are using for the "F", "M", and "S"
> parameters. What kind of receiver are you driving yours with, and do you
> have it in "position hold" mode?
>
>
> Bob
>
>
>
>
>> ________________________________
>> From: Chris Howard <[email protected]>
>> To: Bob Stewart <[email protected]>
>> Sent: Friday, July 12, 2013 6:45 AM
>> Subject: Re: [time-nuts] GPDSO is working
>>
>>
>> On 7/11/2013 10:59 PM, Bob Stewart wrote:
>>> After ham-fistedly breaking a few things, I've finally got my GPSDO
>>> working. (does happy dance) Now that it's had some time to warm up I see
>>> that it's started wandering around +/- a couple of counts from sample to
>>> sample (16 seconds). Is this because the UT+ is not set to timing mode?
>>> Putting in an RS-232 (or USB) to TTL adapter, switchable between the UT+
>>> and the VE2ZAZ board, is pretty much next on my schedule. I've got an
>>> adapter I made many years ago, but it's not suitable for mounting in the
>>> box, and there's no simple way to hook it up to the UT+ at the moment.
>>>
>>> Bob
>>
>> I think I recall you are using the VE2ZAZ board.
>>
>> Yes, the count each time goes up and down.
>> I am using that board
>> and mine goes up and down, roughly in the
>> +/- 5 range.
>>
>>
>> Chris
>> w0ep
>>
>>
>>
>>
>>
>>
>>
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>
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