TB 9-6625-2155-24
(5) Set measuring receiver to measure amplitude modulation, with +PEAK detector,
no filters.
(6) Press TI AM MTR and 100%AM keys. Adjust the audio analyzer output level
for a 50.0 0.1% AM indication on the measuring receiver.
(7) If the TI meter does not indicate within limits listed in table 15 perform b below.
(8) Repeat (6) and (7) above for the 75% AM meter indication listed in table 15.
Table 15. AM Meter
Test instrument meter indication
Test
description
Min
Max
50% AM meter
43.5
56.5
75% AM meter
70
80
(9) Press the TI keys as listed in (a) and (b) below.
(a) FREQUENCY, 3.9, GHz
(b) OUTPUT LEVEL, 0.0 dB
(10) Set the audio analyzer as listed in (a) and (b) below.
(a) Source frequency 1 kHz.
(b) Source level 0.425 V.
(11) Set measuring receiver to measure amplitude modulation, with +PEAK detector,
no filters.
(12) Press TI AM MTR and 100%AM keys. Adjust the audio analyzer output level
for a 30.0 0.05% AM indication on the measuring receiver.
(13) Set the measuring receiver to AM Ratio mode.
(14) Set the audio analyzer to the frequencies listed in table 16; the measuring
receiver will indicate within limits listed in table 16.
Table 16. External AM Frequency Response
Audio
Measuring receiver
analyzer
indication
Test description
frequency
(Hz)
Min
Max
(dB)
(dB)
50
Hz
response
50
-3
+3
400
Hz
response
400
-3
+3
500
Hz
response
500
-3
+3
25
kHz
response
25000
-3
+3
50
kHz
response
50000
-3
+3
(15) Set audio analyzer as listed in (a) through (d) below.
PRGM 99 ENTER RCL.
(a)
(b)
600 output.
(c)
Source frequency 1 kHz.
(d)
Source level 0.7 V.
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