(3) Function switch to ADF.
b. Additional Equipment.
(1) Fabricated cable used to adjust the
(4) All other switches may be set to any posi-
BEARING INDICATOR (fig. 3-5).
tion.
(2) Fabricated cable used to adjust the output
c. Set DC POWER switch to ON.
impedance of the LOOP SIMULATOR (fig. 4-1).
d. Adjust potentiometer R11 (fig. 2-2) until the
multimeter indicates 26 volts ac.
e. Set DC POWER switch to OFF, and discon-
b. Set the switches on the test set as follows:
nect the test set from the 27.5-volt dc power sup
(1) DC POWER switch to OFF.
ply.
(2) RECEIVER-CONTROL switch to CON-
f. Replace the test set front panel (para 3-12).
TROL.
Figure 3-3. Test connections for inverter load adjustment, block diagram.
(3) Connect the vertical input of the oscillo-
scope between the blue and orange leads of resol-
a. Disconnect the test set from the 27.5-volt dc
ver B1. The hot lead to the vertical input must be
power supply.
connected to the blue lead of resolver B1.
c. Refer to figure 4-9, and connect the LOOP
(4) Connect the voltmeter across the vertical
SIMULATOR, signal generator, oscilloscope, and
input of the oscilloscope.
voltmeter as follows:
d. Adjust the equipment as follows:
(1) Connect the signal generator RF OUTPUT
(1) Adjust the signal generator to 100.kc, un-
between the green and yellow leads of LOOP
modulated, at an output level of 3 volts ac.
SIMULATOR resolver B1. The hot lead of the
(2) Adjust the oscilloscope for external hori-
signal generator must be connected to the green
zontal sweep operation.
lead.
(3) Set the vertical polarity of the oscilloscope
(2) Connect the horizontal input of the oscil-
to + up.
loscope across the RF OUTPUT of the signal
e. Set the LOOP SIMULATOR needle to N with
generator.
the LOOP simulator control.
Change 2
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