Re: [time-nuts] Trimble Thunderbolt Issue

[Richard Solomon]

One difficulty is in finding a Block Diagram with sufficient information

to determine which chip does what.


Does one exist ??


Thank you,


Richard S.


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From: time-nuts <time-nuts-boun...@febo.com> on behalf of Chris Caudle 
<ch...@chriscaudle.org>
Sent: Saturday, January 27, 2018 8:55:30 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Trimble Thunderbolt Issue

On Sat, January 27, 2018 9:47 am, J. L. Trantham wrote:
> I remember an issue with another OCXO where the output coupling capacitor
> connection failed and outputs were low.

The thunderbolt uses the output of the OCXO for driving internal clocks,
so likely the OCXO output is OK, but a buffer between the OCXO output and
the connector is bad.

--
Chris Caudle


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Re: [time-nuts] Trimble Thunderbolt Issue

[Chris Caudle]

On Sat, January 27, 2018 9:47 am, J. L. Trantham wrote:
> I remember an issue with another OCXO where the output coupling capacitor
> connection failed and outputs were low.

The thunderbolt uses the output of the OCXO for driving internal clocks,
so likely the OCXO output is OK, but a buffer between the OCXO output and
the connector is bad.

-- 
Chris Caudle


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Re: [time-nuts] Trimble Thunderbolt Issue

[J. L. Trantham]

I agree with Bert.

I remember an issue with another OCXO where the output coupling capacitor 
connection failed and outputs were low.  Opening the OCXO and resoldering the 
connection returned the output to normal.  Morion I think.

I've never heard of this issue with the Trimble but not to say it couldn't 
happen.

Found a link.

https://www.febo.com/pipermail/time-nuts/2013-November/081126.html

Good luck.

Joe

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkehren via 
time-nuts
Sent: Saturday, January 27, 2018 8:44 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Trimble Thunderbolt Issue

Do not toss, first check output of OCXO if good keep if you do not fiend the 
problem. If no output replace. If L H shows that it works bring OCXO output 
directly.Bert Kehren 


Sent from my Galaxy Tab® A
 Original message From: Richard Solomon <w1...@outlook.com> 
Date: 1/26/18  1:39 PM  (GMT-05:00) To: time-nuts <time-nuts@febo.com> Subject: 
[time-nuts] Trimble Thunderbolt Issue I have a T-Bolt whose 10 MHz output has 
dropped off to about 6 mV. Using T-Bolt Mon,

all the Alarms are Green and it shows Tracking 3 or 4 Satellites (small Hockey 
Puck Antenna).


Without a schematic I am lost as to where to look.


Anyone have any suggestions ? I had to toss an otherwise working T-Bolt.


Thanks for any assistance,


Dick, W1KSZ


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Re: [time-nuts] Trimble Thunderbolt Issue

[ewkehren via time-nuts]

Do not toss, first check output of OCXO if good keep if you do not fiend the 
problem. If no output replace. If L H shows that it works bring OCXO output 
directly.Bert Kehren 


Sent from my Galaxy Tab® A
 Original message From: Richard Solomon <w1...@outlook.com> 
Date: 1/26/18  1:39 PM  (GMT-05:00) To: time-nuts <time-nuts@febo.com> Subject: 
[time-nuts] Trimble Thunderbolt Issue 
I have a T-Bolt whose 10 MHz output has dropped off to about 6 mV. Using T-Bolt 
Mon,

all the Alarms are Green and it shows Tracking 3 or 4 Satellites (small Hockey 
Puck Antenna).


Without a schematic I am lost as to where to look.


Anyone have any suggestions ? I had to toss an otherwise working T-Bolt.


Thanks for any assistance,


Dick, W1KSZ


Sent from Outlook<http://aka.ms/weboutlook>
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[time-nuts] Trimble Thunderbolt Issue

[Richard Solomon]

I have a T-Bolt whose 10 MHz output has dropped off to about 6 mV. Using T-Bolt 
Mon,

all the Alarms are Green and it shows Tracking 3 or 4 Satellites (small Hockey 
Puck Antenna).


Without a schematic I am lost as to where to look.


Anyone have any suggestions ? I had to toss an otherwise working T-Bolt.


Thanks for any assistance,


Dick, W1KSZ


Sent from Outlook
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