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6.4.1 Descriptions
The PA unit consists the PA control unit, the PA unit(s), the main control unit, and the PS unit.
NAH-296 has one PA unit. NAH-695 has two PA units. NAH-698 has three PA units. The PA
control sprits the RF IN signal for each PA unit and combine the output from each unit when AC
operation. At DC operation and tuning the PA control pass the RF IN through to RF OUT directly.
The PS unit makes the +24V for battery charging and +BK, +80V for PA, +13.6V for transceiver
unit, modem unit, DTE and printer.
The PA unit makes the RBK signal from –BK signal. The RBK signal keeps low level 3 minutes
more after –BK signal changes to high.
6.4.2 Signals from/to the other units
From/
Connecter
Pin
To
Name
No.
PA IN
TRX
Tuner
JSB-
JSB-
196GM
196GM
PA OUT
Tuner
NFC-
Tuner
296/
896
Accessory
Other
Accessory
GPS 1
AUX P/S
GPS 2
AUX P/S
VHF 1
AUX P/S
VHF 2
AUX P/S
15,
INM-C
AUX P/S
7, 8
GPS
AUX P/S
Buffer
EMG.
AUX P/S
LIGHT
92
Console
Signal
Terminal
Name
PA IN
RF IN
1
85
TXD
2
86
GND
3
87
-BK
4
88
Analog
5
89
-PA mute
6
90
RXD
PA OUT
RF OUT
1
55
+13.6V
2
56
+13.6V
3
57
GND
4
58
GND
5
59
TXD
6
60
RXD
7
61
-PA MUTE
8
62
ANT CURR
4
6
RBK
12
1
+BK
6
2
-BK
11
3
+BK
5
4
-BK
10
5
+BK
9
7
GND
3
8
-TX INH
2
9
-CHG ALM
8
10
DC OUT
1
64
-SES/HF
7
65
-SES OUT
12
74
+24V
4
75
GND
11
76
+24V
3
77
GND
14
47
+24V
6
48
GND
13
49
+24V
5
50
GND
78
+24V
16
79
GND
10
80
+24V
2
81
GND
9
82
+24V
1
83
GND
Description
Input for power amplifier.
Transmission data to the Transceiver.
Signal ground.
Key signal from the Transceiver.
Antenna current analog data.
Prohibit the transmission of the Transceiver.
Received data from the Transceiver.
Power amplifier output.
+13.6V power source for tuner.
DC power return. Signal ground.
Transmission serial data.
Receive serial data.
Transmission is prohibited when low.
Antenna current analog data.
Set the tuner ready to transmit when low.
+BK (+24V DC)
-BK
+BK (+24V DC)
-BK
+BK (+24V DC)
Signal ground.
Transmission is prohibited when low.
Low when battery charging is abnormal.
Low when DC operation.
SES DC operation remote control output.
SES DC operation status output.
DC power source for No.1 GPS.
(Maximum current 3A)
DC power source for No.2 GPS.
(Maximum current 3A)
DC power source for No.1 VHF.
(Maximum current 5A)
DC power source for No.2 VHF.
(Maximum current 5A)
DC power source for INMARSAT-C.
(Maximum current 15A)
DC power source for GPS buffer NQD-3030.
(Maximum current 1A)
DC power source for emergency light.
(Maximum current 1A)
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