[time-nuts] Need a schematic of Trimble 2003 era Thunderbolt RX

[wb6bnq]

Hello Bob,

First, there are no schematics available unless you want to, besides 
nondisclosure agreements, probably pay a HUGE amount of money to 
Trimble, if they would even entertain such an idea.

Second, the 1pps output is a very fast rise narrow pulse that requires a 
very fast oscilloscope to even see.  The easier way would be to use a 
pulse stretcher of some sort to make the pulse wider so that slower 
scopes could see it.

As for the 10 MHz signal, how would a DC voltage have any relationship 
to the AC signal of the 10 MHz ?  You would need to build an AC detector 
to monitor the signal output.

Bill....WB6BNQ

Bob Burchett wrote:

>Anyone have a link or PDF of the T-Bolt schematic? We are "never satisfied"
>with how things that seem to be working fine might fail one day in our
>critical environment SO: 
>
> 
>
>The object of the game is so if the T-Bolt fails to provide the 10 MHz
>signal that the loss of it will trigger a fail-over mechanism to a backup
>source so we built up a monitor-keys-a-controller circuit that watches the
>10 MHz and while we DO have the Trimble PDF manual it doesn't have a
>schematic AND: 
>
> 
>
>Issue 1 is: We are monitoring the 10 MHz output of the T-Bolt and it appears
>to be AC coupled so this isn't as easily detected and we want to tap-in
>before the coupling capacitor to get a straight DC coupled signal for our
>special signal monitor circuit; that is one reason for schematic need PLUS: 
>
> 
>
>Issue 2 is: We see NO signal coming from the 1 PPS BNC jack and we hear that
>this is a port that can be enabled/ disabled and we are hoping one of you
>know how to enable it to output the 1 PPS which we might use to drive the
>monitor circuit OR: 
>
> 
>
>Optionally: how we might rewire it so we can get 10 MHz out of that "unused"
>jack to feed our monitor circuit.
>
> 
>
>Thanks!
>
> 
>
>Robert L. "Bob" Burchett WB6SLC
>
>Certified Communications Engineer
>
>Enterprise Electronics
>
>22826 Mariposa Ave. 
>
>Torrance CA 90502
>
>Direct line: 310.534.4456
>
>FAX: 310.534.1233
>
>Website: www.EEonTheWeb.com
>
> 
>
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