INITIAL POWER ON, SELF-TEST, AND OPERATIONAL CHECK.

TM 11-6625-2975-40

2-3. GENERAL. (CONT)

Each test is complete and maybe performed Individually, Therefore, you may choose the appropriate

test to verify gross equipment failure or performance degradation of a specific module. However, this

maintenance approach is not recommended. It is best to perform all the tests In sequence. This

systematic maintenance approach wiII ensure that all faults are found and corrected.

WARNING

HIGH VOLTAGE is used during the following tests. DEATH ON CONTACT may result If

personnel fall to observe safety precautions,

Dangerous potentials exist at several points throughout this equipment, when the

equipment Is operated with the case removed. Do not touch exposed connections or

components.

NOTE

In order to obtain proper results, all tests should be performed under the following

environmental conditions: temperature, + 50 to + 104F ( + 10 to + 40C); maximum

relative humidity, 95 percent.

2-4. INITIAL POWER ON, SELF-TEST, AND OPERATIONAL CHECK.

Before starting the performance test sequence, do the Initial adjustments, self-test, and operational

check as described In TM 11-6625-2975-12, If test set falls any portion of these tests, turn to the

troubleshooting section of this manual and follow the steps In troubleshooting chart 2-1.

2-5. FREQUENCY ACCURACY PERFORMANCE TEST.

NOTE

This test checks output and modulation tone frequencies.

TEST EQUIPMENT REQUIRED: Adapter, N plug-to-BNC jack

Frequency Counter HP 5345A

RF Cable RG-58/U

EQUIPMENT SETUP Connect test set to 115 vac power source.

Connect frequency counter to test set as Indicated In the following diagram.