Thanks for that suggestion, Ed. After a bit of reading in the X72 Reference
Guide, it appears that the X72 does have a 1PPS input. That would be
considerably easier than trying to interface the Rb into the GPSDO. Still
trying to understand what the manual is telling me. Next thing is to
determine if my unit has that option enabled (firmware option). That will
be a chore for after the holiday... really busy next week.
What would that (1PPS disciplining) do for me... in terms of maintaining the
Rb frequency accurately set? Would it be as accurate as having the Rb
disciplined via the EFC input?
Thanks,
Dave M
Message: 5
Date: Fri, 22 Aug 2014 16:19:45 -0600
From: Ed Palmer <[email protected]>
To: Discussion of precise time and frequency measurement
<[email protected]>
Subject: Re: [time-nuts] EFC info on Trimble 34310-T OXCO
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Have you checked your X72 to see if it has the 1 PPS discipline
option?
That would be a lot easier (and probably better) than your proposed
transplant.
Ed
On 8/22/2014 12:39 PM, Dave M wrote:
Does anyone have any info on the OXCO in the Nortel/Trimble
NTBW50AA-17 GPSTM receiver? The OXCO is labeled as Trimble 34310-T.
I see some Trimble 34310-T oscillators on Ebay with pinouts labeled,
but no other info.
Specifically, I'd like to know the EFC characteristics for it. I'm
thinking of the possibility of pulling the OXCO out of the GPSTM and
subbing in a 10 MHz Rubidium, and using the GPSTM to discipline the
Rubidium. My Rubidium is a Symmetricom X72, recently purchased. It
seems to be working well.
Does anyone know the differences between the three OXCOs used in the
GPSTM receivers ("T", "T2" and "Oak")?
Thanks for some insight,
Dave M
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