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60 Chapter 1
Making Basic Measurements
Demodulating AM Signals (Using the Analyzer As a Fixed Tuned Receiver)
b. RF Output Power –10 dBm
c. AM On
d. AM Rate 1 kHz
e. AM Depth 80%
2. Set the analyzer as follows:
a. Press Preset, Factory Preset (if present).
b. Set the center frequency to 300 MHz by pressing FREQUENCY,
Center Freq, 300, MHz.
c. Set the span to 500 kHz by pressing SPAN, Span, 500, kHz.
d. Set the resolution bandwidth to 30 kHz by pressing BW/Avg,
Resolution BW, 30, kHz.
e. Set the Y-Axis Units to dBm by pressing AMPLITUDE, More,
Y-Axis Units,
dBm.
f. Change the analyzer sweep to 20 msec by pressing Sweep,
Sweep Time, 20, ms. See Figure 1-50.
Figure 1-50 Viewing an AM Signal
3. Set the Y-Axis Units to V by pressing AMPLITUDE, More, Y-Axis Units,
V.
4. Position the signal peak near the reference level by pressing
AMPLITUDE and rotating the front-panel knob.
5. Change the amplitude scale type to linear by pressing AMPLITUDE,
Scale Type (Lin).