[time-nuts] Triangle Waves
magnus at rubidium.dyndns.org
Wed Feb 3 20:12:27 UTC 2010
Bruce Griffiths wrote:
> Magnus Danielson wrote:
>>> When both the RF and LO ports are saturated, the mixer output
>>> waveform depends on how the IF port is terminated.
>>> The output is indeed approximately triangular with your IF port
>>> termination method when both the RF and LO ports are saturated.
>> My experience says that it also depends on the relative phase... so it
>> shifts between approx falling saw to approx tri to approx rising saw
>> to approx falling saw over a 360 degree beat period. Kind of
>> comforting to see this shift occurring slowly on the scope.
> Your description is for the beat frequency output or for the input
> signal waveforms?
I am describing the beat frequency waveform.
> With a finite frequency beat signal one gets a periodic modulation of
> the phase difference between the 2 inputs.
Indeed, tuning offset oscillator will provide a suitable phase sweep rate.
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