Kenwood TS-870S - Manual (Page 21)

15
3 GETTING ACQUAINTED
REAR PANEL
q GND post with wing nut
Connect a heavy gauge wire or copper strap between
the ground post and the nearest earth ground {page 3}.
Do not connect the ground wire to either your house
electrical wiring, or gas or water pipes. A well-grounded
transceiver will reduce the risk of interference to
television, broadcast radio receivers, and other
electronic devices. A good ground can also reduce
receiver noise caused by static discharges.
w ANT 1 and ANT 2 connectors
Connect the feed lines from your antennas to these
connectors. Refer to pages 2 and 63 for details.
e Power Input DC 13.8 V connector
Connect a 13.8 V DC power source {page 3}. Use the
supplied cable with a regulated DC power supply. The
TS-870S draws less than 20.5 A at maximum transmit
output.
r AT connector
Mates with the connector on the cable supplied with the
AT-300 antenna tuner. Refer to the instruction manual
supplied with this tuner for more information.
t EXT RX ANT jack
Mates with an RCA pin plug for connecting a separate
receiver. Menu No. 53 enables this jack. Never
transmit into this jack. Signals received by the TS-870S
are distributed via a power divider to the TS-870S
receive stage and the external receiver. Therefore,
connecting an external receiver reduces the signal level.
y IF OUT 1 jack
Mates with an RCA pin plug for connecting the
8.83 MHz IF for pan display of an SM-230 Station
Monitor {page 6}.
u REMOTE connector
Mates with a 7-pin male DIN connector for connecting a
linear amplifier {page 5}.
i EXT SP jack
Mates with a 3.5 mm (1/8") diameter, 2-conductor
(mono) plug for connecting an external speaker
{page 4}. Connecting an external speaker cuts off the
audio automatically to the internal speaker.
o ACC 2 connector
Mates with a 13-pin male DIN connector for connecting
various accessory equipment {page 6}.
!0 PADDLE and KEY jacks
Mates with a 6.0 mm (1/4") 3-conductor plug and a
3.5 mm (1/8") 2-conductor plug for connecting a key
paddle for the internal electronic keyer and another key
for CW operation respectively. Read “Keys and
Keyboards for CW Operation” {page 4} before
connecting to these jacks.
!1 RTTY jack
Mates with an RCA pin plug for connecting the RTTY
key output from RTTY equipment to operate true
frequency shift keying (direct keying) {page 5}.
!2 COM connector
Mates with a 9-pin female RS-232C connector for
connecting a computer via one of its serial
communication ports {page 83}. Functions on the
transceiver can be controlled remotely by using a
communications program on the computer {pages 5,
83}. Also used with the Quick Data Transfer function
{page 65}.
Note: Before using the REMOTE, ACC 2, and COM connectors,
remove the protective covers.
GND
EXT
RX ANT IF OUT 1 REMOTE
EXT SP
8 ACC 2
ANT 2 ANT 1
KEY PADDLE RT TY
COM
DC 13.8V
20.5A AT
q w e r
t y u o i !0 !1 !2