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Preliminary Procedures
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TB-11-6625-821-35 Calibration Procedures for Direction Finder Set AN/ARM-93 Manual
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Adjustments

TB 11-6625-821-35
(b) Turn RECEIVER-CONTROL switch on the unit under test (see fig. 3) to
CONTROL.
Figure 3. Direction Finder Test Set SN/ARM-93, front panel.
(c) Set DC POWER switch on the unit under test to ON.
(d) Turn the function switch on the unit under test to ADF.
(e) Turn CONTROL TEST of the unit under test to 1.
(f) Insert the ac probe of Voltmeter ME-202/U into the center of the 1A fuse
cap.
(g) Multimeter should indicate 26 ±0.5 volts ac. If not perform b(1) below.
(2) Frequency Measurement.
(a) Connect the equipment as shown in figure 4.
(b) Insert the probe of frequency meter AN/USM-26 into the center of the 1A
fuse cap.
5

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