In my experience, using a tracking generator and spectrum analyser works fine on "realitively" modest Q circuits. The swept response display picture, is however a function of the detector response and the sweep speed of the generator. That is, the detector display will be deeper as the sweep speed is reduced and the effect is compounded when the Q of the circuit is very high as in a cavity. A synthesized generator and crystaled receiver will always give you a deeper null reading and will always allow you to find the "real" sweet spot.
Michal Smialowski <[EMAIL PROTECTED]> wrote:
I have always tuned duplexers just using a signal generator and a radio receiver. Peaking the passband and then going for the deepest notch for the reject. Although this seems to work, the results haven't been spectacular. I realize that there are many variables to consider. My question is, does using a spectrum analyzer and a sweep generator ( I am guessing here) make the process better, and if it does, how so ie what is the principle behind it?ThanksMike SmialowskiVE7SMLSmithers BC Canada
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