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Section III. FUNCTIONAL OPERATION OF MECHANICAL ASSEMBLIES
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TM-11-5820-815-14 Service and Circuit Diagrams RADIO SET AN/GRC-171 Manual
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Table 5-1. Test Equipment Required (Sheet 2 of 3)


TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
CHAPTER 5
MAINTENANCE
INTRODUCTION
This chapter provides maintenance instructions for uhf
This chapter presupposes that maintenance personnel
AM Radio Set AN/GRC-171. Section I provides infor-
are thoroughly familiar with the physical makeup and
mation  on  organizational/intermediate  maintenance.
theory of operation of Radio Set AN/GRC-171.
Section II provides special maintenance procedures.
SECTION I
ORGANIZATIONAL/INTERMEDIATE
MAINTENANCE
AN/GRC-171. Equivalent test equipment may be used.
5-1. GENERAL.
Audio test fixture (figure FO-34) may be used to facilitate
connecting test equipment to the RT-980/GRC-171.
5-2. This section contains all maintenance instructions
necessary  for  the  organizational  or  intermediate
5-5. TEST POINTS.
maintenance technician.
5-6. Table 5-2 lists all test points and provides a
5-3. MAINTENANCE TEST EQUIPMENT.
functional description for each test point. Refer to
figure 5-1 for test point location.
5-4. Table 5-1 lists the recommended test equipment
required for checkout and maintenance of Radio Set
Table 5-1. Test Equipment Required (Sheet 1 of 3)
TEST EQUIPMENT
TEST CHARACTERISTICS
RF Generator/Frequency Counter
AN/USM -323
Frequency Range: 225 to 400 MHz,0.0015 MHz.
Output level: 3.0 ÁV to 1.0 V.
Modulation level: 30 to 90%.
Modulation frequency: 400 to 10,000 Hz.
Frequency counter: 225 MHz ▒1125 Hz to 399.975 MHz
2000 Hz.
Boonton RF Voltmeter Model 91DA
0 to 30 ▒ 0.6 mV rms, 0 to 30 ▒ 0.06 V rms.
Frequency range: 10 to 400 MHz.
5-1


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