Figure 2-1. Breakout box connected to AN/ARC-114 sections.

TM 11-6625-2405-15

the toggle switch is set to OFF.

c. Connect the breakout box or extender cable

g. Connect the test facilities kit to the power

between the front and rear radio set halves as

source.

shown in figures 2-1, 2-2, and 2-3 for Radio Sets

AN/ARC-114, AN/ARC-115, and AN/ARC-

116, respectively, with breakout boxes, or in fig-

2-6. Test Procedures

ures 2-4, 2-5, and 2-6 for the same radio sets

The DS ,GS, and Depot Maintenance manuals for

with extender cables.

Radio Sets AN/ARC-114, AN/ARC-115, and

d. Connect a power and control cable from

AN/ARC-116 give specific instructions for all

RADIO SET No. 1 jack J1 on the test facilities

procedures required during testing. In respect to

kit to J1 of the breakout box, if used, or to the

the maintenance accessory kit, most instructions

rear of the radio set if an extender cable is used.

involve the making of connections as described in

Cable CX-10889/U is used in Radio Set AN/

paragraph 2-5 and the use of the UG914/U,

ARC-114 tests and CX-10891/U is used in tests

UG-1893/U, UG-J1894/U, and UG-1895/U

of Radio Sets AN/ARC-115 or AN/ARC-116.

adapters.

These cables are part of the MK-994/AR.

a. For all dynamic tests, or for any voltage

checks, applicable controls on Test Facilities Kit

e. If the termination box (fig. 1-8 ) is re-

MK-994/AR must be set to on, the toggle switch

quired, plug its jack into the U-92A/U connec-

on the breakout box must be set to ON, and the

tor of the CX-10888/U cable from the HEAD-

function selector switch on the radio set placed in

SETS 1 connector on the MK994/AR. Cables

any position except OFF. For resistance checks,

CX-12175/ARM and CX-12176/ARM are sup-

either disconnect power to the MK-994/AR or

plied to connect the termination box to audio in-

set the toggle switch on the breackout box to OFF.

put or audio output test equipments (MIC or

HDST double banana plug jacks respectively).

This permits measurements on the input lines

The audio circuits are connected through the ter-

(jacks on breakout boxes labeled A2J1 ), on ex-

tender cards (b below), various accessible points

mination box, cable CX-10888/U, the MK-994/

AR, and cable CX-10889/U or CX-10891/U (d

on the radio set exposed front and rear sections,

above) to the breakout box or directly to the rear

and at the front-rear section connectors (at the

lower set of jacks on the breakout boxes (figs.

of the radio set.

f. If a breakout box is used, check to see that

2-1, 2-2, and 2-3 )). In evaluating resistance or

Figure 2-1. Breakout box connected to AN/ARC-114 sections.

2-2