TB 9-6625-1997-24
Table 11. Internal Modulation Deviation Check - Continued
Adjustments1
Test Instrument
Modulation
analyzer
(located on
deviation
test
FUNCTION
DEVIATION
RF TUNING
indications
instrument
KHZ
DEVIATION
BAND
control for
switch
(kHz)
lower left
SWITCH
RANGE kHz
meter
settings
side)
settings
(MHz)
switch settings
indications
(Hz)
Min
Max
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, repair the TI
in accordance with the maintenance manual. Reseal adjustment screw upon completion of adjustment.
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.
