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How come I do not hear any audio when I tune the spectrum analyzer in the Keysight 8920A,B, 8921A, 8924C,E to an FM or AM signal?

The selected modulation type (AM,FM,SSB) can only be heard from the speaker if the span setting is 1.5 MHz or less. The demodulated audio is muted if the span is set higher than 1.5 MHz. This assumes the AF analyzer's input (AF Anl In) is set for AM, FM,or SSB Demod.

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