Filter
Top Products
I
-
I
-
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