Kenwood TK-782 Service Manual page 32

2. Accessory Terminal (TX-RX Unit A/2)
2-1. External Connector Accessory Terminal Method
Connector Pin Pin I/O
No. No. name
CN1 1 DEO O Detect signal output. (Output level :
250mVrms; standard modulation)
2 AHK I External hook signal input.
On hook : L, Off hook : H
3 IGN I Ignition sense input.
4 DI I External modulation signal input.
(Input level : 100mVrms)
5 ME - MIC earth.
AM I Audio mute signal input.
6 MI I Internal MIC input.
TXS O Signal indicating whether the
transceiver is transmitting or not.
TX : H
7 PTT I External PTT signal input.
TX : L
8 SQ O Squelch signal output. Signal logic
type can select "Carrier operate relay"
or "Tone operate relay". Active logic
level or type can select in the KPG-77D.
CN2 1 AM I Audio mute signal input.
LOK O TX logic signal output. Active logic
level is low. Active type can be
selectable in the KPG-77D.
2 MM I MIC mute input.
3 DTC I Data control channel signal input.
Data channel : L, Normal channel : H
TXS O Signal indicating whether the trans-
ceiver is transmitting or not.
TX : H
FSW I Foot switch signal input.
Foot sw on : L, Foot sw off : H
LOK O TX logic signal output. Active logic
level is low. Active type can be
selectable in the KPG-77D.
CN3 1 HOR O Horn alert signal output. Signal
output for horn relay drive (open
collector). L level during horn drive :
Max. sink current 100mA.
L level when AUX A is on.
2 E - Earth.
3 SB O Power output after power switch
(DC 13.6V±15%, 0.75A max.).
INSTALLATION /
Function
TK-782
31