TACAN Requirements - Diagram and Details - REV.pdf

CHAPTER 2

SPECIAL TOOLS AND TEST EQUIPMENT

2.1 GENERAL.

This chapter lists the test equipment required to maintain Tactical Air Navigation (TACAN) Navigational Set AN/ARN- 118(V) at the intermediate level.

2.2 TEST EQUIPMENT.

Table 2-1 lists the test equipment required for intermediate maintenance of the AN/ARN-118(V). Equivalent equipment may be used for the TACAN simulator and TACAN test set.

Table 2-1. Required Test Equipment

Type Designation Figure Number Nomenclature Use AN/ARM-135(A) (National Stock Number (NSN ) 6625-01-006- 1584)

Figure 2-1 TACAN test set Simulates both surface and air-to-air TACAN stations.

or

AN/ARM-135 (NSN 6625-00-106-

9655)

Figure 2-2 TACAN test set Simulates both surface and air-to-air TACAN stations.

AN/PSM-6 Multimeter Continuity testing.

T-1401-2 TACAN Test Set Simulates both surface and air-to-air TACAN stations.

AQU-4/A Figure 2-4 Horizontal Situation Indica-tor (HSI) Provide distance and bearing indi-cations during hotmockup testing.

Collins 972V-1 with 255H-1 Figure 2-3 TACAN test set Provides means to test TACAN equipment.

DA-12/U Radio Frequency (RF) coax termination

Load unused antenna connector.

HP3466A (NSN 6625-01-121-

6976)

Digital multimeter General testing.

Frankford Arsenal (NSN 6645-00- 250-4680)

Stopwatch Check times during testing.

MIL-C-9988 Frequency counter Alignment.

Tektronix 475 (NSN 6625-00-127- 0079)

Oscilloscope Check signal waveforms.

NVG-103B or equivalent Night Vision Imaging Sys-tem (NVIS) Inspection Scope for Night Vision Compatibility

Trouble Shooting White Light Leakage.

TO 12R5-2ARN118-12

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Figure 2-5. TACAN Test Set ATC-1400A-2/T-1401-2

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Both TACAN Test Sets AN/ARM-135 and AN/ARM-135(A) may have voltages exceeding 30 volts present on the power plug when the Alternating Current (AC) power plug is disconnected. Discharge AC power plug to ground immediately after removal. Failure to comply could result in injury to, or death of, personnel or long term health hazards.

NOTE

• The following procedures apply to both TACAN Test Sets AN/ARM-135 and AN/ARM-135(A) as well as the ATC-1400A-2/T-1401-2. Use care in selecting only those instructions pertinent to TACAN test set being used.

• Switches must be set in sequence as listed.

• The RT-1159/A elapsed time indicator is not required to be serviceable.

a. Remove dust cover from RT-1159/A and inspect in accordance with Table 6-1. Connect RT-1159/A to test equipment as shown in Figure 5-1.

b. Set test equipment switches according to Table 5-1.

c. Set TACAN test set switches as follows:

(1) Set AN/ARM-135 AC POWER to ON.

(2) Set AN/ARM-135(A) POWER to ON.

(3) Set ATC-1400A-2/T-1401-2 POWER to ON.

(a) Connect 115 Volts (V) 60 Hertz (Hz) AC power to T-1401-2 AC IN connector.

(b) Select T-1401-2 power switch to ON (ATC-1400A-2 should also turn on).

(c) Push T-1401-2 BEARING CLEAR SWITCH to set bearing to 000.

(d) Push T-1401-2 RATE CLEAR SWITCH to set bearing rate to 0.

(e) Push ATC-1400A-2 RANGE LOAD SWITCH to set range to 155.5 nautical miles (NMI).

(f) Adjust Radio Frequency (RF) LEVEL control for 50 reading in - decibel-milliwatts (dBmw) display.

NOTE

ATC-1400A-2 will not turn on until T-1401-2 power switch is in the ON position.

d. Set 972V-1 TACAN test set MAIN PWR switch to ON.

Table 5-1. Test Setup Initial Control Settings

Test equipment Control Setting 972V-1 TACAN Test Set DISPLAY SELECT CONTROL

R/T STATUS OFF

CONTROL INT

INTERNAL CONTROL

CHANNEL

X10 7

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