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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