TB 9-6625-1997-35
Table 11. Internal Modulation Deviation Check - Continued
Test Instrument
Modulation
analyzer
Adjustments1
RF TUNING
DEVIATION
FUNCTION
deviation
(located on
DEVIATION
KHZ
control for
switch
BAND
indications
test
SWITCH
RANGE kHz
meter
settings
(kHz)
instrument
settings
(MHz)
switch settings
indications
(Hz)
Min
Max
lower left side
D
32
10
10
150
8
12
R40
400
DEVIATION
1000
CALIBRA-
20
20
150
17
23
TION
400
BAND D (R)
1000
40
30
150
25
35
400
1000
40
40
150
35
45
400
`
1000
1Note
position of adjustment screw and use a gyptol solvent before making adjustment. Adjust until indication is within
limits specified. If out-of-tolerance condition is not corrected within approximately one turn of adjustment screw, refer to
b. Adjustments. No further adjustments can be made.
16. Power Supply
NOTE
Do not perform power supply check if all other parameters
are within tolerance.
a. Performance Check
(1) Connect multimeter between +25 V test point (TP2 located on rear of TI
chassis) and chassis ground, using probes.
(2) Set power switch to OPERATE and FUNCTION switch to MOD OFF.
(3) Set RF OUTPUT switch to 0-10 KUV.
If multimeter does not indicate
between 24.25 and 25.75 V, perform b below.
b. Adjustments.
Adjust R55 MAIN SUPPLY +25 V for a 25-V indication on
multimeter (R).
17. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
