[time-nuts] Cable length calibration
Brooke Clarke
brooke at pacific.net
Wed Jun 29 20:08:15 UTC 2016
Hi Hal:
I think the cal process is essentially a time domain reflection measure of cable length. The GPS receiver and the cable
cal hardware would be in the antenna unit.
The 1 PPS signal would be aligned at the output of the cable.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
> brooke at pacific.net said:
>> At one point they were looking into making a GPS time receiver where the
>> cable length calibration would be built-in.
> How would you do that?
>
> The obvious way is to compare the time you get with a known-good time, but if
> you had that, why would you want this new GPS with an unknown cable length.
>
> You might be able to do it by measuring the DC drop. Getting enough accuracy
> seems tough.
>
>
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