Page 21
F
T-991 O
peraTing
M
anual
6
4
5
3
1
1
2
7
8
r
ear
p
anel
ANT
Jack
Connect your main antenna(s) here, using type-M
(PL-259) connectors and coaxial feed lines. The in-
ternal antenna tuner affects only the antenna(s) con-
nected here, and only during transmission.
Warning!
The 100V RF voltage (@100 W/50 Ω) is applied to
the TX RF section of the transceiver while trans-
mitting. Do not touch the TX RF section while
transmitting.
DC IN
Jack
This is the DC power supply connection for the
transceiver. Use the supplied DC cable to connect di-
rectly to a DC power supply, which must be capable
of supplying at least 23 A @13.8 VDC.
GND
Use this terminal to connect the transceiver to a good
earth ground, for safety and optimum performance.
Use a large diameter, short braided cable for making
ground connections, and please r
efer to page ## for
other notes about proper grounding.
To prevent damage from light
ning, atmo-
spheric electricity, electrical shock, etc., be
certain to provide a good earth ground.
TUN/LIN
Jack
TUN
(Tuner)
This 8-pin output jack is used for connection to the
FC-40
External Automatic Antenna Tuner.
LIN
(Linear)
This 8-pin output jack provides band selection data,
which may be used for control of optional accesso-
ries such as the
VL-1000
Solid-state Linear Ampli-
fier.
RTTY/DATA
Jack
This 6-pin input/output jack accepts AFSK input
from a Terminal Node Controller (TNC) or an op-
tional interface unit; it also provides fixe
d level (100-
mV @600 Ohms) receiver audio output, and FSK
keying line.
REM/ALC
Jack
REM
(Remote)
By plugging the optional
FH-2
Remote Control
Keypad into this gold-plated jack, direct access to
the
FT-991
CPU is provided for control functions
such as contest memory keying, plus frequency and
function control.
ALC
( )
Содержание FT-991
Страница 2: ......
