[time-nuts] Delay through GPS antenna splitter/amplifier -- an answer, and a question
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Mon Mar 12 19:44:01 EDT 2007
Tim Shoppa wrote:
> Dr Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
>>> At the lab I worked at in the 80's, all the cables hanging on
>>> the wall-racks were calibrated and labeled in nanoseconds.
>>> But... after the ECL signals got turned into TTL, we just didn't
>>> care anymore :-).
>> Your not quite obsessive enough.
>> The cable delays (including the antenna to splitter cable) should also
>> be a multiple of half the signal period to minimise the effects of
>> residual mismatches at either end of the cable.
> Signal period? Periodic signals?
> If only we had the luxury!
> I was not working on the side of the lab where the experiments were
> vaporized, though :-).
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Sorry I should have said a multiple of half the L1 carrier period
So the cable delay should be a multiple of 317.375...ps.
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