TB 9-4931-488-24
Figure 5. AM - Equipment Setup.
(3) Set measuring receiver to acquire the frequency then to measure AM with peak
+ detector. Set high-pass filter to 50 Hz and low-pass filter to 15 kHz.
and 600 Ω load impedance.
NOTE
In techniques (5) and (7) below, record measuring receiver
% AM display indication using Peak +/- 2 detector.
(5) Adjust pulse generator output controls for levels in table 19. If the measuring
receiver does not indicate between min and max, perform b below.
Table 19. AM Sensitivity.
Measuring receiver % AM
Pulse generator
indications (%)
Output level (V rms)
Min
Max
0.636
85.5
94.5
0.495
66.5
73.5
0.354
47.5
52.5
0.212
28.5
31.5
0.141
19.0
21.0
0.071
9.5
10.5
(6)
Adjust pulse generator output controls for a 1.414 V rms level.
(7) Adjust AM control for TI meter indications as listed in table 20. The measuring
receiver should indicate between min and max limits.
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