TM 11-5826-225-35
3-18. Adjustment and Synchronization of
3-19. Servo Balance Adjustment
Resolver Servosystem
a. Connect the equipment as shown in figure
2-2. It is not necessary to connect the signal
generator, audio output meter, or headset.
a. Connect the equipment as shown in figure
2-2.
b. Set the switches on the control unit as
follows :
b. Set the control unit switches as follows:
(1) BFO-OFF switch to BFO.
(1) BFO-OFF switch to BFO.
(2) Function switch to ADF.
(2) Function switch to ADF.
(3) GAIN control fully clockwise.
(3) GAIN control fully clockwise.
c. Set the switches on the test set as follows:
c. Set the test set switches as follows:
(1) DC POWER switch to ON.
( 1 ) RECEIVER-CONTROL switch to
RECEIVER.
( 2 ) RECEIVER-CONTROL switch to
RECEIVER.
(2) GONIO DRIVE switch to ON.
(3) GONIO DRIVE switch to ON.
(3) DC POWER switch to ON.
d. Set the control unit range switch to 190-
d. Set the range switch on the control unit
400, and adjust the control unit TUNE control
to 190-400 and adjust the TUNE control on
to 990 kc on the FREQUENCY indicator.
the control unit to 300 kc on the FREQUEN-
CY indicator.
e. Set the frequency of the signal generator
to 890 kc, unmodulated, at an output level of
e. Adjust R10 (fig. 2-8) so that the speed
1,000 microvolt.
of rotation of the BEARING INDICATOR
on the test set does not exceed 7200 in 2
f. Adjust the frequency of the signal gen-
minutes.
erator for a zero beat in the headset. Remove
the headset from the test set.
f. Tighten the locknut of R10.
g. Set the BFO-OFF switch to OFF.
3-19.1 Slow Slew Speed Adjustment
h. Set the LOOP SIMULATOR to N
NOTE
(zero 0,.
i. Remove the two outside, rearmost screws
Resistor R133 is selected from 1500,
on the top of the chassis; remove the two
1800, 2200, 2700, or 3900 ohms to obtain
rearmost screws on the bottom of the chassis,
the proper slow slew speed of the loop
and swing out the rear of the chassis.
antenna. This selection is necessary due
to variations in the components of the
j. Loosen the three screws (51, fig. 5-16)
loop servo-amplifier circuitry
just enough to rotate the body of B4 (60).
k. Rotate the body of B4 until the test set
a. Connect the equipment as shown in figure 2-
BEARING INDICATOR indicates N (zero ).
2. It is not necessary to connect the signal
generator, audio output meter, or headset.
l. Set the control unit function switch to
LOOP.
b. Set the switches on the control unit as
m. Rotate the gears (94 and 96) on B3
follows:
(110) for a maximum indication on the output
meter,
(1) BFO-OFF switch to OFF.
n. Rotate the body of B4 until the test set
(2) Function switch to LOOP.
BEARING INDICATOR again indicates N
(zero ).
c. Set the test set switches as follows:
o. Tighten the three screws (51) and secure
(1) DC POWER switch to OFF,
the hinged portion of the receiver.
Change 5
3-28
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