Audio Amplifier Distortion Test

TM 11-5820-498-35

3-22. Audio Amplifier Distortion Test

a. Test Equipment and Materials.

(1) Generator, Signal AN/URM-127.

(6) Voltmeter, Electronic

(2) Spectrum Analyzer TS-723A/U.

ME-30(*)/U.

(3) Mounting MT-1029/VRC.

(7) Resistor, carbon: 130

ohms, 10%, 5 watts.

(4) Power Supply PP-2953(*)/U, or equal.

(5) Receive dummy load assembly (para 3-3e, fig. 3-1).

b. Test Connection and Conditions. Connect the equipment as shown in A, figure 319. Turn on the

equipment and allow it to warm up 5 minutes before proceeding,

c. Procedure.

(2) Short circuit test. No two pins on P2

3-23. CX-4655/GRC, Test Procedure

and P5 should indicate a short circuit (O ohm)

a. Test Equipment and Materials. Use Multi-

when the ME26(*)/U is connected between the

meter ME-26(*)/U as an ohmmeter.

pins on the connector.

b. Test Connections and Conditions. Use the

ME-26(*)/U as instructed in c below.

c. Procedure (fig. 35).

(1) Continuity test. Use the ME-26(*)/U to

test the continuity (O ohm) between each pin of

connector P2 with the corresponding pin on

connector P5, except that between pins F, L, and

R there is no continuity (infinite resistance).

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