TB 9-6625-2049-24
9. Amplitude Modulation Distortion
a. Performance Check
(1) Press keys and enter values using DATA keys as listed in (a) through (i) below:
SIGNAL off (option 002 not lit).
(a)
FUNCTION sine wave.
(b)
ENTRY FREQ.
(c)
1 MHz.
(d)
ENTRY AMPTD.
(e)
3 VOLT.
(f)
ENTRY DC OFFSET.
(g)
0 VOLT.
(h)
Blue then AM ON.
(i)
(2) Connect equipment as shown in figure 2.
Figure 2. AM distortion - equipment setup.
(3) Set audio analyzer for a 50
(SPCL 75), 10 kHz, 2.5 V output.
(4) Set measuring receiver to measure AM.
(5) Adjust audio analyzer level until measuring receiver indicates 80%.
(6) Set measuring receiver to measure distortion in dB. Measuring receiver
indication will be -30 dB.
(7) Press TI blue key then DATA AM OFF key.
b. Adjustments. No adjustments can be made.
