Filter
Top Products
Chapter 1 63
Making Basic Measurements
Demodulating AM Signals (Using the Analyzer As a Fixed Tuned Receiver)
Figure 1-54 Measuring Time Parameters
10.You can turn your analyzer into a % AM indicator as follows:
a. Set trigger to free run by pressing Trig, Free Run.
b. Set the sweep time to 5 seconds by pressing Sweep, Sweep Time, 5,
s.
c. Set the video filter to 30 Hz by pressing BW/Avg, Video BW, 30, Hz.
d. Change the reference level to position the trace at midscreen by
pressing AMPLITUDE, Ref Level, and adjacent the reference level
using the front-panel knob.
e. Reset the video filter to a high value. For example, press BW/Avg,
Video BW, 100, kHz.
f. Set the sweep time to 5 milliseconds by pressing Sweep, Sweep
Time
, 5, ms.
The center horizontal line of the graticule now represents 0% AM;
the top and bottom lines, 100% AM. See Figure 1-55.