Kenwood TK-790 Service Manual page 76

TK-790/ ( B
Connector Terminal Terminal
No. No. Name
Acc 25 pin D-sub connector
1 RSI
2 AI1
3 AI2
4 AI3
5 AI4
6 AI5
7 E
8 AO2
9 TXD2
10 RXD2
11 TXS
12 MCM
13 MI/DI
14 NC (SB)
15 RSV1
16 RSV2
17 AFO
18 E
19 DEO
76
) /H ( B )
TERMINAL FUNCTION
I/O Terminal Function
O RSSI signal output.
RSSI vs ANT input (Typical value)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
–130 –120 –110 –100
Wide
Narrow ANT input level [dBm]
I Auxiliary input 1 (FPU selectable).
I Auxiliary input 2 (FPU selectable).
I Auxiliary input 3 (FPU selectable).
I Auxiliary input 4 (FPU selectable).
I Auxiliary input 5 (FPU selectable).
– Earth
O Auxiliary output 1 (FPU selectable).
O Serial data output.
I Serial data input.
O TX sense signal output.
"H" : TX, "L" : Another
I MIC mute signal imput.
"L" : Mute on, "H" : No change
I MIC/Data signal input 1. (Default : DI)
Input impedance
DI : 10kΩ or more
MI : 600Ω
Coupling
DI : DC coupling
MI : DC coupling
Frequency response
DI : ~9.6kHz +1/–3dB (1kHz=0dB)
MI : Compliance with TIA/EIA-603
Deviation
DI : 60% deviation or more.
(1kHz 2.5Vp-p input)
MI : 60% deviation
(1kHz 5mV± 1.5mV input)
O Non connection.
(SB : 13.6V or 13.4V 0.5A max.
Refer to page 20)
– Reserved.
– Reserved.
O RX audio signal output (Same as
CN504 pin No.1)
RX condition : RX audio output.
Output level 125mVrms.
(Standard modulation)
PA copndion : MIC output.
Output level 300mVrms.
(1kHz 5mV input)
– Earth
O Detector signal output.
Output impedance
1kΩ or less
Coupling
DC coupling
Output level : 100mVrms
(Standard modulation)
Connector Terminal Terminal
No. No. Name
20 AO1
21 AO3
22 AO4
23 SQ
24 SPM
25 ME
–90
Acc 9 pin connector
1 IGN
2 ES2
3 RS1
4 HR1
5 HR2
6 ES1
7 OS1
8 OS2
9 E
Acc 12 pin connector (Remote kit)
1 IGN
2 SB
3 E
4 MIC
5 ME
6 AI1
7 AI2
8 AO1
9 AO2
10 RS1
11 RS2
12 –
I/O Terminal Function
Output frequency response :
Wide : 300~4.8kHz +1/–2dB
4.8~9.6kHz +1/–24dB
Narrow : 300~4.8kHz +1/–10dB
(1kHz=0dB)
O Auxiliary output 1 (FPU selectable).
O Auxiliary output 3 (FPU selectable).
O Auxiliary output 4 (FPU selectable).
O Squelch signal output.
"L" : Busy, "H" : Not busy
I Speaker mute signal input.
"L" : Mute on
– MIC earth.
I Ignition sense input.
O BTL output for external speaker A.
I Remote speaker switch
O Horn alert signal output 1.
O Horn alert signal output 2.
O BTL output for external speaker A.
O BTL output for external speaker B (PA).
O BTL output for external speaker B (PA).
– Earth.
3 6 9
2 8
5
1 4 7
I Ignition sense input.
O Power output after power switch
(13.6V or 13.4V± 15%).
– Earth.
I MIC signal input.
– MIC earth.
I Auxiliary input 1 (FPU selectable).
I Auxiliary input 2 (FPU selectable).
O Auxiliary output 1 (FPU selectable).
O Auxiliary output 2 (FPU selectable).
O Remote speaker output.
O Remote speaker output.
– Non connection.
3 6 9 12
2 8 11
5
1 4 7 10