Linear Amplifier (Remote) - Kenwood TS-870S Instruction Manual

SS
2 INSTALLATION
mw Computer Interface (COM)
This connector allows you to directly connect a computer or dumb terminal by using an RS-232C cable terminated
with a female 9-pin connector. No external hardware interface is required between your computer and the
transceiver if your computer has an unused RS-232C serial communications port. See Appendix D on page 83 for
information relating to this connector.
RS-232C
serial port
9 PO
2Oce © aa |
=
dumb terminal
m@ RITY Equipment (RTTY and ACC 2)
To operate Frequency Shift Keyed RTTY, connect your RTTY equipment as shown below. Connect the RTTY key
output from your RTTY equipment to RTTY, and connect the demodulation input of your RTTY equipment to
ACC 2, Pin 3. By default, a short condition generates a space; an open generates a mark. However, this can be
reversed via Menu settings.
Do not share a single power supply between the transceiver and the RTTY equipment. Keep as wide a separation
as possible between the transceiver and the RTTY equipment as practical to reduce noise-pickup by the
transceiver.
P PDP
Personal computer/
dumb terminal
@ Linear Amplifier (REMOTE)
The REMOTE connector allows connection of an external transmit power amplifier. If using an amplifier, confirm
that Menu No. 51 (LINEAR) is set to "1" (Fast) or "2" (Slow) {pages 24, 27}. This Menu item controls the linear
amplifier TX/RX relay response time. Use the Fast setting unless you experience switching problems when using
your amplifier for semi break-in operation.
Speaker PTT for
amplifier
ALC input 412 VDC on
transmit
GND
(10 A max)
AC LINE
REMOTE Connector
RF OUTPUT
(Rear Pane! view)