Keysight N9030A Measurement Manual

Also see for x series: Manual Installation note Measurement guide Measurement guide Measurement guide

Contents

Keysight N9030A Measurement Manual Manual pdf 11 page image

11Demodulating AM, FM, ΦM, FM Stereo/RDS SignalsDemodulating an AM SignalDemodulating an AM SignalThis section demonstrates how to demodulate and listen to an AM signal. You cantune to an AM signal and view the results of the detector output displayed in thequad-view window or in single-window format.Alternatively, the demodulated signal is also available as an audio output (to thespeaker or headphone jack) and as video output (on the rear panel).The signal under test is a 680 kHz signal with AM depth of 50% and AM rate of 1kHz. Note that if you are using a broadcast AM signal in the United States, forexample, the AM channels are broadcasting between 550 kHz and 1650 kHz.Step Action Notes1 Select Analog Demod mode. Press Mode, Analog Demod.2 Preset the mode. Press Mode Preset.3 Select AM measurement. Press Meas, AM.4 Set the center frequency ofthe AM signal.Press FREQ Channel, CenterFreq, 680, kHz.5 Adjust the sweep time andview the measurementresults as in the figurebelow.Press Sweep/Control, DemodWfm Sweep Time, 2, ms.6 Listen to the demodulatedAM signal.Press Meas Setup, Demod toSpeaker.You may need to adjust the volumeas necessary.