Receiver Channeling Circuit Test

TM 11-6625-409-12

(1) Connect one end of cable No. 1 to XMTR

Megacycle

Test lamp

Megacycle

Test lamp

PLUG TOP receptacle J-103-7A on the top of the MX-

dial setting

indications

dial setting

indications

3736/ARM-45 (fig. 2-4); connect the other end of the

130 .............

A, C, D, M 140................ D, M, N

cable assembly to XMTR PLUG TOP receptacle J-101-

131 .............

A, C, D, J

141................ D, J, N

7A.

132 .............

B, D, M

142................ A, M, N

(2) Connect one end of cable No. 1A to XMTR

133 .............

B, D, J

143................ A, J, N

PLUG BOTTOM receptacle J-104-7B; connect the other

134 .............

A, D, M, N 144................ A, B, M, N

end of the cable assembly to XMTR PLUG BOTTOM

135 .............

A, D, J, N

145................ A, B, J, N

receptacle J-102-7A.

136 .............

B, M, N

146................ B, C, M, N

(3) Operate the 27.5 VOLTS DC switch (fig. 2-

137 .............

B, J, N

147................ B, C, J, N

3) to ON.

138 .............

C, M, N

148................ A, C, D, M,N

(4) On the remote control unit (fig.

2-5),

139 .............

C, J, N

149................ A, C, D, J, N

operate the SCS-DCS/DCD switch to SCS. If remote

control unit 614U-5 is used operate the COMM-

(8) Operate the XMIT-STANDBY switch on the

NAV/COMM switch to COMM.

front panel of the MX-3736/ARM-45 to XMIT. The

(5) Observe the test lamps on the front panel

STANDBY

lamp should be extinguished and the

of the MX-3736/ARM-45. Test lamps A, D, E, L, M, and

MICKEY lamp and XMIT lamp should be lighted.

STANDBY should be lighted.

(9) Operate the 27.5 VOLTS DC switch to

(6) On the remote control unit, operate the

OFF. Set the remote control unit megacycle and

kilocycle dial control knob through the frequency range

kilocycle dial knobs to 116.00 mc. Do not change any

indicated in the chart below. Check for the proper test

other control or switch positions.

lamp indications at each increment on the kilocycle dial.

(10) Disconnect test cables No. 1 and No. 1A

NOTE

from the test cable receptacles. Do not disconnect cable

Test lamps A, D, M, and STANDBY should remain

No. 3.

lighted throughout the test.

c. Receiver Channeling Circuit Test (B, fig. 2-2)

Perform the procedures below to test the AN/ARM-45

Kilocycle dial Test lamp Kilocycle dial

Test lamp

controls and test cable assembly associated with

receiver channeling. If improper test lamp indications

setting

indications

setting

indications

are obtained during the test, request higher echelon

maintenance.

00...............

E, L

50....................

E, H, L

(1) Connect one end of cable No. 2 to ACFT

05...............

E, K

55....................

E, H, K

TEST receptacle J-106-2B; connect the other end of the

10...............

F, L

60....................

E, F, L

cable assembly to EQUIP TEST receptacle J-105-2B.

15...............

F, K

65....................

E, F, K

(2) Operate the 27.5 VOLTS DC switch to ON.

20...............

E, G, L

70....................

F, G, L

(3) Observe the test lamps on the front panel

25...............

E, G, K

75....................

F, G, K

of the MX-3736/ARM-45. Test lamps C, D, E, L, M, N,

30...............

F, H, L

80....................

G, H, L

and STANDBY should be lighted.

35...............

F, H, K

85....................

G, H, K

(4) On the remote control unit, operate -the

40...............

G, L

90....................

H, L

kilocycle dial control knob through the frequency range

45...............

G, K

95....................

H, K

indicated in the chart in b (6) above. Check for the

proper test lamp indications at each increment on the

(7) On the remote control unit, operate the

kilocycle dial.

megacycle dial control knob through the frequency

NOTE

range indicated in the chart below. Check for the proper

test lamp indications at each increment on the

Test lamps C, D, M, N, and STANDBY should

megacycle dial.

remain lighted throughout the test.

NOTE

(5) On the remote control unit, operate the

Test lamps H, K, and STANDBY should remain

megacycle dial control knob through the frequency range

lighted throughout the test.

indicated in the chart below. Check for the proper test

Megacycle Test lamp

lamp indications at each increment on the megacycle

dial setting

indications

dial setting

indications

dial.

116............. A, D, M

123.................. D, J

117............. A, D, J

124.................. A, M

NOTE

118............. B, M

125.................. A, J

Test lamps H, K, and STANDBY should remain

119............. B, J

126.................. A, B, M

lighted throughout the test.

120............. C,M

127.................. A, B, J

121............. C, J

128.................. B, C, M

122............. D, M

129.................. B, C, J

2-4