Quantcast FIGURE 2-2. CONNECTING MODEM TO TYPICAL EQUIPMENT (2 OF 2)

 

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FIGURE 2-2. CONNECTING MODEM TO TYPICAL EQUIPMENT (1 OF 2)
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TM-11-5805-387-20-2 Modem Radion Teletypewriter MD-522A/RC (NSN
Next
Adjusting L oop Current Internal/External Switch
TM 11-5805-387-20-2
REF
REF
CONNECTION
CONNECTION
DESIG
PIN
DESIG PIN
FROM AUX RECEIVER AUDIO
J1
A
10 MW OUTPUT TO HEADPHONES
J4
A
B
GROUND
GROUND
B
c
50 OHM MICROPHONE INPUT
SPARE
C
D
SPARE
SPARE
D
GROUND
E
GROUND
E
F
RECEIVER-TRANSMITTER KEYLINE
F
SPARE
H
GROUND
G
SPARE
J
GROUND
600 OHM AUDIO INPUT
H
K
COMMON BUSS TO PIN K ON
SPARE
J
K
SPARE
L
2-WATT OUTPUT TO SPEAKER
FROM RECEIVER-TRANSMITTER AUDIO
J2
A
REMOTE ONE WAY-DUPLEX SWITCH
J5
A
GROUND
B
B
GROUND
TO RECEIVER-TRANSMITTER
c
AUX PRIMARY POWER SOURCE
50 OHM MICROPHONE INPUT
c
(NOMINAL +27 VDC UNFUSED)
D
COMMON FOR PINS C AND J
D
RECEIVER-TRANSMITTER KEYLINE
E
GROUND
E
REMOTE SEND-RCV SWITCH
F
RECEIVER-TRANSMITTER KEYLINE
F
SPARE
G
SPARE
G
SPARE
H
GROUND
H
SPARE
TO RECEIVER-TRANSMITTER
J
J
SPARE
600 OHM INPUT
K
SPARE
K
COMMON BUSS TO PIN K ON
J3 AND J4
J6
A
DC LOOP NO. I POSITIVE SIDE
J3
A
10 MW OUTPUT TO HEADPHONES
(INTERNAL SUPPLY)
B
GROUND
B
GROUND
c
DC LOOP NO. I NEGATIVE SIDE
c
50 OHM MICROPHONE INPUT
(INTERNAL SUPPLY)
D
SPARE
J7
A
DC LOOP NO. 2 POSITIVE SIDE
E
MICROPHONE RETURN
(INTERNAL SUPPLY)
RECEIVER-TRANSMITTER KEYLINE
F
B
GROUND
H
GROUND
c
DC LOOP NO. 2 NEGATIVE SIDE
(INTERNAL SUPPLY)
J
600 OHM AUDIO INPUT
J8
A
+27 VDC NOMINAL
K
COMMON BUSS TO PIN K ON
J2 AND J4
B
+27 VDC NOMINAL
c
GROUND
L
SPARE
GROUND
D
F I G U R E 2-2. CONNECTING MODEM TYPICAL EQUIPMENT (2 OF 2)
2-5

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