Demodulating and Listening to an AM or FM Signal

The functions listed in the menu under Demod allow you to demodulate and hear signal information displayed on the spectrum analyzer. Simply place a marker on a signal of interest, activate AM or FM demodulation, and then listen.

Example:

1.Connect an antenna to the spectrum analyzer input

2.Select a frequency range on the spectrum analyzer, such as the range for FM radio broadcasts. For example. the freauencv range for FM broadcasts in the United States is 88 MHz to iOS MHz: Press @‘ET), (FREQUENCY),

START FREQ , 88 IFnHz], STOP FREQ , 108 @J).

3.Place a marker on the signal of interest by using CPEAK SEARCH) to place a marker on the highest-amplitude signal, or by pressing LMKR] ,

MARKER NORMAL and moving the marker to a signal of interest.

4.Press [AUX], Demod , DEMOD ON OFF (so that ON is underlined), and

DEMOD AM FM (so that FM is underlined). SPEAKER ON OFF is set to ON by the preset function. Use the front-panel volume control to control the speaker’s volume.

5.The signal is demodulated at the marker’s position for the duration of the dwell time. Use the step keys, knob, or number/units keypad to change the dwell time. For example, press the step-up key (m) twice to increase the dwell time to 2 seconds.

6.The peak search functions can be used to move the marker to other signals of interest. Press [PEAK SEARCH) to access NEXT PEAK , NEXT PK RIGHT , or NEXT PK LEFT .

5-23