Kenwood TS-570D Marine Radio User Manual


 
62
15 CONNECTING PERIPHERAL EQUIPMENT
MCP AND TNC
Use the ACC 2 connector to connect the input/output lines from a Terminal Node Controller (TNC) for Packet operation,
a Multimode Communications Processor (MCP) for operation on Packet, PacTOR, AMTOR, G-TOR
TM
, or FAX, or from
a Clover interface. Also use the ACC 2 connector to connect SSTV and phone patch equipment.
Connect the TNC or MCP to the ACC 2 connector using a cable equipped with a 13-pin DIN plug.
Connecting the TNC or MCP to a personal computer or dumb terminal requires an RS-232C cable.
Note:
Do not share a single power supply between the transceiver and the TNC or MCP. Keep as wide a separation as possible between the
transceiver and the computer as practical to reduce noise-pickup by the transceiver.
The output voltage of Pin No. 6 (SMET) is not 0 V even when no signal is present. In addition, the output voltage differs between FM
(approx. 2.8 ~ 3.8 V) and other modes (approx. 0.5 ~ 3.8 V). When connecting this pin to peripheral equipment such as a personal computer,
the input impedance of that equipment must be higher than 1 M
. If you connect to equipment having lower impedance, the S-meter will not
give accurate readings.
TNC/MCP
TS-570
PS-53
13
9101112
5678
1234
TNC/MCP
power
supply
Personal computer
dumb terminal
Black
Red
ACC 2 Connector
(Rear panel view)
1
2
3
4
5
6
7
8
9
10
11
12
13
NC
RTK
ANO
GND
PSQ
SMET
NC
GND
PKS
NC
PKD
GND
SS
Pin
Name
Pin No.
Not connected
RTTY key input
AF output from receiver
Connect to TNC or MCP receive data pin for digital operation.
AF output level is independent of AF control setting.
AF output level can be changed via Menu No. 34.
Output impedance: 4.7 k
Shield for pin 3
Squelch control
Connect to TNC or MCP squelch control pin for digital operation.
Prevents the TNC from transmitting while the receiver squelch is open.
Squelch open: Low impedance
Squelch closed: High impedance
S-meter output
Not connected
Chassis ground
Transceiver PTT line control
Connect to TNC or MCP transmit/receive switching pin for digital operation.
Microphone audio input is muted when the transceiver is switched to the transmit mode.
Not connected
Microphone audio input
Connect to TNC or MCP transmit data pin for digital operation.
Shield for pin 11
PTT control (in parallel with MIC jack) for connecting a footswitch or other external controller
Function