On Mon, Jun 17, 2013 at 09:35:51PM -0400, paul swed wrote:
> Wellll as they say. I am most likely going to use a simple phase flipper.
> That preserves all of the Nist stuff and traceability and such. A flipper
> is simply a invert or non inverted signal and a switch. It is subject to
> propagation. But no more so than the original receivers.
> The remodulator gets rid of the carrier for time clocks.
> Both are actually reasonable to implement.
> Enough said other things to do.
> Paul
OK, clearly there is an advantage to that...
Does preserve the original carrier for traceability (sorta,
it does get inverted in phase from time to time)...
And the actual I channel of a Costas loop directly out of the I
double balanced mixer should have a plus and minus signal one could low
pass filter and feed to a simple zero cross detector to control the
phase flip. And if this is done by flipping carrier out of the TRF
stage via a DBM or analog switch and inverter it should preserve the AM
modulation on the original unless the TRF stage acts as a limiter...
--
Dave Emery N1PRE/AE, [email protected] DIE Consulting, Weston, Mass
02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."
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