Figure 2-10. 68 MHz osillator circuit, functional diagram.

TM 11-6625-467-34

Figure 2-10. 68 MHz osillator circuit, functional diagram.

testing individual modules of Radio Set AN/

columns in the tables correspond to similarly titled

A R C - 5 4 . The switching arrangement consists of

columns in the operating procedures. Tables 2-1

four 10-position, 6-deck, front panel rotary switches

through 2-7 explain the function of each CIRCUIT

SELECTOR switch wafer. Only the switch wafers

labeled CIRCUIT SELECTOR A, B, C, and D. The

that perform a specific function for the test being

inputs and outputs of the AN/ARC-54 modules, as

well as the inputs and outputs of the functional cir

performed are listed. Table 2-1 includes the RF

JUMPER CABLE column. This column describes

cuits, connect to the switches. Setting the switches

the function of RF jumper cables connected as part

t o specified positions connects a complete test

of the test. Use tables 2-1 through 2-7 to determine

arrangement for a given module circuit. Operating

the testing configuration for any module circuit.

procedures given in TM 11-6625-467-12 list the

Figure FO-3, which is a schematic diagram of the

C I R C U I T SELECTOR switch setting for each

CIRCUIT SELECTOR switches, shows the routing

m o d u l e test. Tables 2-1 through 2-7 below are

of the test signals through the switches; refer to

keyed to the operating procedures in TM 11-6625

this figure to determine the signal flow for any CIR-

467-12. The STEP column. the TEST NAME

CUIT SELECTOR switch setting.

c o l u m n , and the CIRCUIT SELECT SWITCH

2-11