OPERATIONAL PERFORMANCE TEST PROCEDURE

11-5805-451-15

TABLE 5-3. OPERATIONAL PERFORMANCE TEST PROCEDURE

PROBABLE

CAUSE OF

NORMAL

OPERATION

TEST

TROUBLE

INDICATION

2 AND 3 DIRECTION CONFIGURATIONS

Printed Wiring Boards Provided:

Voice-frequency amplifier boards iamplifiers): None

Adjustable attenuator boards (attenuators): AT7 in J15, AT8 in J16, and

(for 3-direction only) AT9 in J17

Four-way, four-wire hybrid boards (hybrids): Al in J2

Strapping Connections- TB4-3 to TB4-1, TB4-4 to TB4-2, TB1-1 to TB4-5,

TB1-2 to TB4-6 and (for 3-direction only) TB4-7 to TB4-9, TB4-8 to

TB4-10

Points Terminated: TB4-7 & 8 and TB1-9 & 10 (2-direction only)

LEVEL CHECKS - 2 AND 3 DIRECTION

Terminate the following

terminals with 600-ohm

resistors: TB1-5,6;

TB1-7,8, TB3-1,2,

TB5-5,6, TB5-7,8: and

TB6-1.2, for 3 direction,

also terminate TB1 -9,10

and TB5-9,10.

a. Remove termination at

TB6-1 & 2 and insert

1-kHz test tone at -5

dBm.

b. Measure level at

-20 dBm

Faulty hybrid Al

TB4-3 & 4.