System Adjustments

TM 11-5805-424-15/NAVELEX 0967-220-9010/TO 31W2-2G-41

(2) Adjustment.

(2) Connect the tagged leads disconnected in

a above to the terminal boards.

(a) Remove screw in top of oscillator

and oven assembly and insert thermocouple probe of

2-8. System Adjustments

temperature tester (Simpson Model 388-3L), NSN 6685-

00-975-4544, into oven through screw hole.

(b) Observe oven temperature until a

a. Bias.

stable reading is obtained. If not 75° C proceed to (c)

(1) Connect the oscilloscope between test

below.

point TP7 on the control shelf (fig. 2-3) and ground.

(2) Adjust the oscilloscope to observe two

control R1 over a period of 10 minutes to obtain a 75°C

crossover patterns.

indication on the temperature tester. Lock setting of R1

(3) Adjust the BIAS ADJ control for minimum

and apply a drop of glyptal varnish to shaft.

distortion (crossover points as near the center of the

(d) Remove probe from oven and

pattern as possible); then, disconnect the oscilloscope.

replace screw.

b. Delay Equalization (MX-7373/G, MX-7375/G,

f. Final Procedure.

MX-7383/G, and MX-7385/G).

(1) Disconnect the test equipment and the

shielded twisted pair signal cable connected in a above.

Figure 2 6. Plug-in module of Modem Subassembly MX-7372/G, MX-7374/G, MX-7376/G, MX-7377/G, MX-7378/G,

MX-7380/G MX-7381/G, MX-7382/G, MX 7384/G, or MX-7386/G.

Change 5

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