Description of Analog Test Adapter

TM 11-6625-2937-13

a. Control-Interface Unit (fig.

1-2).

The

Three extender cards are supplied with the data link

tester for use at DS level. Card No. 2 is for use in the

control-interface unit comprises two major assemblies

control-interface unit, card No. I is for extending a circuit

that form an integral assembly: electrical equipment

card in an encoder, and card No. 3 is for extending a

housing (IAI), and circuit card assembly rack (1A2).

circuit card in a decoder.

Electrical equipment housing IAI contains three power

d. Coax Adapter. The coax adapter is used

supplies, an input power line filter assembly and a circuit

during testing of the decoder to provide a connection

breaker. Circuit card assembly rack I A2 is comprised of

point for an oscilloscope.

a front panel and circuit card rack. The front panel

e. Dummy Load. The dummy load is used

contains controls and indicators, and the circuit card rack

contains seven circuit cards necessary to the operation

during testing of the decoder to provide a load for the

of the control-interface unit. The circuit card rack also

deflection amplifiers.

Ballast. The ballast is used during testing

provides for interconnecting circuit cards under test to

the control-interface unit.

of the decoder at J5.

b. Data Link Tester Accessory Cables (fig. 1-

g. Card Edge Connector.

standard

2). The following subparagraphs describe all accessory

connector that plugs into the top of circuit cards thus

cables of the data link tester.

permitting easy access to any pin by a probe.

(1) Cable Assembly, Power, Electrical W1.

h. Test Set Case (fig. 1-2). The test set case

Cable W1 is a four-wire cable assembly approximately

is a lightweight, self-sealing carrying case. It is equipped

72 inches long. It is used to connect three-phase

with carrying handles, a pressure-relief valve, and quick-

primary input power to the control-interface unit.

release cover latches. The control-interface unit is

(2) Cable Assembly, Special Purpose,

stored in the main body of the case with all accessories

Electrical W2. Cable W2 is a 156-wire cable assembly

stored in the cover.

approximately 36 inches long. It is used to interconnect

1-12. Description of Analog Test Adapter

signals between the control-interface unit and the digital

(fig. 1-3)

tester.

The analog test adapter is a breakout box that is used at

(3) Cable Assembly, Special Purpose,

the depot for troubleshooting analog circuit cards. This

Electrical W3. Cable W3 is a 44-wire cable assembly

adapter is used in conjunction with standard test

approximately 48 inches long. It is used to connect

equipment to fault isolate to the component level. It

signals from the control interface unit to the

consists of 90 front panel test points, POWER ON/OFF

microprocessor or standard logic card under test.

switch, voltage and signal input switches, signal

(4) Cable Assembly, Special Purpose,

generator connectors, input power connectors, right and

Electrical W4. Cable W4 is a 10-wire cable assembly

left switch power ports, and a 90-pin circuit card

connector. The 90-pin circuit card connector provides

approximately 48 inches long. It is used to connect

fan-out to the 90 test points on the front panel.

power from the control interface unit to the encoder or

decoder for analog circuit card testing.

c. Data Link Tester Extender Cards (fig. 1-2).

1-6