Analyzer If Display - Motorola R-2001D Operator's Manual

ANALYZER IF DISPLAY
INCIDENTAL AM
UNMODULATED FM CARRIER
MODULATED FM CARRIER
WITH INCIDENTAL AM
AM MODULATION
x
=
PE A K AMPLITUDE
Y
=
VALLEY AMPLITUDE
X-V
%
AM
=-
X100
X+Y
FIGURE 4·14. ANALYZER IF DISPLAY
Figure 4-14 shows a typical IF DISPLAY, its modulated FM carrier with incidental AM, and a formula for calculating %
AM. Use the IF mode to view the modulation envelope of the RF signal, to detect and examine incidental AM (in FM
modes), and to check AM depth of modulation. Because the IF DISPLAY provides only a qualitative indication, use the
Monitor DISPLAY with AM Monitor FUNCTION to determine precise AM measurements.
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