I love Dan's idea, with one caveat. The transmission through a powered-down LNA is an unknown, probably even to the manufacturer. Thus comparing output signal levels with power on or off is pretty meaningless.
But his test with power on should be a great way to get some clue that the antenna is working, and is clearly simpler to perform than what I was suggesting yesterday. Dana On Sat, Aug 21, 2021 at 9:49 AM Daniel Schultz <[email protected]> wrote: > > Should I be able to "see something" on or around the GPS frequency other > > than what I suspect will be something visual looking like a noise/pulse > > source/signal? > > You could try sweeping a harmonic from a signal generator across the > antenna > passband, this would be visible on the spectrum analyzer and might give > you an > idea if the preamp is amplifying or attenuating the signal. Try it with the > preamp power on and off. If your signal generator does not generate > sufficient > harmonics at L band you can feed the signal into an overdriven MMIC > amplifier. > > Dan Schultz N8FGV > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send > an email to [email protected] > To unsubscribe, go to and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
