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4-4
TB1
CH2
SEC-
SEC+
SHLD
PRI-
PRI+
CH1/DAR
SEC-
SEC+
SHLD
PRI-
PRI+
16
15
2
LED1
CH2
LED2
CH1/DAR
1
SEC 1
TB3
TB2
1
P2
1
TB1
2
1
SEC 2
DAR
CHANNEL OUT
NAA IN
NAA OUT
NAA
VOLUME
R4
SW1
LED1
LED2
LED3
LED4
DAR GROUND FAULT
SEARCH ACTIVE
PDI RECEIVE
ENABLE
PRIMARY RECEIVE
SECONDARY RECEIVE
DIGITAL
RISER
ON-ENABLE
NAA
1
2
3
4
SW2
LSB
MSB
1
2
3
4
LINE
25V
70V
SHLD
PRI 1
Below is an illustration of the various TIC and audio riser circuit boards.
Figure 4-1. Transponder Interface Cards
Note, the audio risers are not approved for use in Australia.
Continued on next page
Introduction to MINIPLEX Transponders (4100U), Continued
TIC Illustrations
4100-0620
BASIC TIC
4100-0625
LOCAL MODE TIC
4100-0621 ANALOG
AUDIO RISER
4100-0622 DIGITAL
AUDIO RISER