Specifications

100 Chapter 11
Demodulating AM and FM Signals
Demodulating an FM Signal Using the ESA-E Series (Requires Option BAA)
Demodulating AM and FM Signals
Figure 11-5 Calculating Frequency Deviation
Step 10. Take a single sweep of the demodulated signal and then calculate the
FM rate using delta markers on adjacent peaks. Change the marker
readout value to inverse time for a frequency calculation of the FM rate:
Press
Marker, Off.
Press
View/Trace, Clear Write.
Press
Single, Peak Search, Marker, Delta, Peak Search, Next Pk Right (or
Next Pk Left).
Press
Marker, More, Readout, Inverse Time.
Figure 11-6 Calculating Modulation Rate
Step 11. Listen to the FM signal (first put the analyzer back into continuous
sweeping mode):
Press
Sweep, Sweep (Cont).
Press
Det/Demod, Demod, Speaker (On).
Adjust the volume of the internal speaker with the volume knob on the
front-panel. Alternatively you can also use the headphone jack (located
below the 3.5 inch floppy disk drive).