TM 11-6625-821-45
f. Loosen the three resolver clamps that hold
(4) Set the LEVEL-Q switch to LEVEL, and
resolver B1 to the resolver housing.
rotate the ZERO ADJ LEVEL control until the
g. Rotate the entire resolver until a null is indi-
CIRCUIT Q voltmeter reading is O.
(5) The LEVEL-Q switch to Q, and rotate the
h. A 360 rotation of resolver B1 will produce two
ZERO ADJ Q control until the CIRCUIT Q volt-
nulls 180 from each other. To determine which is
meter reading is O.
the correct null, perform the following procedure:
(6) Set the LEVEL-Q switch to LEVEL.
(1) As viewed from the rear of the LOOP
(7) Set the RF ON switch to ON.
SIMULATOR, rotate resolver B1 approximately
(8) Adjust the SET LEVEL FINE and the
5 clockwise from the null position.
SET LEVEL COARSE controls until the CIR-
(2) Disconnect the horizontal lead from the
CUIT Q voltmeter pointer is over the redline on
oscilloscope, and adjust the vertical gain for a
the meter.
4-centimeter vertical trace, centered on the verti-
(9) Set the LEVEL-Q switch to Q.
cal axes.
(3) Reconnect the horizontal lead, and discon-
(11) Set the MICRO MICRO FARADS IN-
DUCTANCE control to 200 micro-microfarads,
(4) Adjust the horizontal gain of the oscillo-
(12) Set the Q RANGE switch to positions
scope for a 4-centimeter horizontal trace, centered
required to keep the CIRCUIT Q voltmeter within
on the horizontal axes.
its range.
(5) Reconnect the vertical lead to the oscillo-
e. Adjust the LOOP SIMULATOR on the test
scope.
set so the needle points to N.
(6) A 1-to-1 Lissajous pattern should be ob-
f. Adjust variable inductor L3 in the test set (fig.
2-2) for a maximum
Q-indication on
the Q-meter.
is tilted into the upper right-hand quandrant, the
The maximum Q-indication must be greater than
null obtained in g above was the correct null.
20.
Readjust resolver B1 for the null obtained in g
g. Disconnect the fabricated cable from the
above and proceed to i below.
Q-meter.
(7) If the top of the 1-to-1 Lissajous pattern is
h. Using the fabricated cable, connect pins F and
tilted into the upper left-hand quadrant, rotate
H of cable W3 to the COIL terminals of the
resolver B1 approximately 175 clockwise as
Q-meter.
viewed from the rear of the LOOP SIMULATOR
i. Adjust the LOOP SIMULATOR on the test
and adjust for another null indication on the vol-
set so the needle points to E.
tmeter. Proceed to step i below.
j. Adjust variable inductor L8 in the test set (fig.
i. Tighten the three resolver clamps that hold
2-2) for a maximum
Q-indication on
the Q-meter.
resolver B1 to the resolver housing.
The maximum Q-indication must be greater than
j. Disconnect all the test equipment, and replace
20.
k. Disconnect the equipment, and replace the
3-16. LOOP SIMULATOR Impedance
Adjustment
3-17. Adjustment of
SEARING INDICATOR
a. Remove the BEARING INDICATOR (para
c. Connect the equipment as shown in figure
4-10. A detailed drawing of the fabricated cable is
c. Remove the front cover from the BEARING
INDICATOR by removing the eight screws and
d. Adjust the Q-meter as follows:
(1) Set the POWER ON switch to ON.
the rear side of the rear housing.
(2) Set the range switch to the 450-1500 KC
d. Set the control on the test set as follows:
position.