Resolution of a spectrum analyzer under dynamic operating conditions

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Abstract
The effect of high frequency sweep rate on the resolution bandwidth of a spectrum analyzer is discussed. An analytical treatment of the problem is presented and the cases of a noncausal and a causal resolution filter are compared. The case of a cascaded synchronous single‐tuned amplifier is also examined. The analysis shows that under certain circumstances, the dynamic resolution bandwidth can be used instead of the static one. In this case, the changes introduced by the high frequency sweep rate in the resonance curve of the resolution filter must be taken into consideration.