TB 9-4931-488-35
(a) AM switch to INT.
(b) AUDIO OUTPUT LEVEL control fully cw.
(c) AM vernier fully cw.
(d) MODULATION FREQUENCY RANGE switch to FIXED FREQ 1 kHz (1000
Hz for opt 004).
(e) RF OFF/ON switch to ON.
(f) FM switch to OFF.
(2) Connect audio analyzer to AM OUTPUT using 600-Ω termination.
(3) Set audio analyzer and TI to the first functions and settings listed in table 18.
(4) Audio analyzer will indicate within limits specified in table 18.
(5) Set audio analyzer and TI to the remaining functions and settings listed in table
Test instrument
Audio analyzer
Modulation frequency
Modulation
Function
Distortion
Volts
Frequency
range switch settings
frequency
indication
indication
vernier
Minimum
Maximum
≤
>
FIXED FREQ 1 kHz
----------
Level
----------
1 (3)
----------
----------
1
FIXED FREQ 1 kHz
----------
Frequency
----------
----------
970
1030
FIXED FREQ 1 kHz
----------
Distortion
0.5%
----------
----------
----------
FIXED FREQ 400 Hz
----------
Frequency
----------
----------
388
412
FIXED FREQ 400 Hz
----------
Distortion
0.5%
----------
----------
----------
X1
100
Frequency
----------
----------
85
115
2
X1
100
Distortion
0.5%
----------
----------
----------
X1
20
Frequency
----------
----------
17
23
X1
20
Distortion
0.5%
----------
----------
----------
X10
100
Frequency
----------
----------
850
1150
X10
100
Distortion
0.5%
----------
----------
----------
X10
200
Frequency
----------
----------
1700
2300
X10
200
Distortion
1.0%
----------
----------
----------
X100
200
Frequency
----------
----------
17,000
23,000
X100
200
Distortion
1.0%
----------
----------
----------
X100
100
Frequency
----------
----------
8,500
11,500
X100
100
Distortion
1.0%
----------
----------
----------
X1K
100
Frequency
----------
----------
85,000
115,000
X1K
100
Distortion
1.0%
----------
----------
----------
X1K
200
Frequency
----------
----------
170,000
230,000
3
X3K
200
Frequency
----------
----------
510,000
690,000
X3K
20
Frequency
----------
----------
51,000
69,000
1Values
in parenthesis are for option 001.
Perform remaining test only for TI's containing option 001 & H66
2
3 Replace audio analyzer with frequency counter before this measurement.
b. Adjustments. For TI's containing options 001 & H66, perform (3) through (19)
below. For all other TI's, perform (1) and (2) below.
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