1-13
!6 ACCESSORY SOCKET 1 A [ACC 1–A]
!7 ACCESSORY SOCKET 2 A [ACC 2–A]
!8 ACCESSORY SOCKET 1 B [ACC 1–B]
!9 ACCESSORY SOCKET 2 B [ACC 2–B]
Enable connection of external equipment such as a
linear amplifier, an automatic antenna
selector/tuner, a TNC for data communications, etc.
• See p. 2-10 for socket information.
@0 ALC LEVEL ADJUSTMENT POT [ALC ADJ]
Adjusts the ALC levels.
No adjustment is required when the ALC output
level of the connected non-Icom linear amplifier is
0 to –4 V DC.
@1 ALC INPUT JACK [ALC] (p. 2-7)
Connects to the ALC output jack of a non-Icom lin-
ear amplifier.
@2 T/R CONTROL JACK [RELAY] (p. 2-7)
Goes to ground when transmitting to control an ex-
ternal unit, such as a non-Icom linear amplifier.
@3 STRAIGHT KEY JACK [KEY] (p. 2-4)
Accepts a straight key or external electronic keyer
with
1
⁄4 inch standard plug.
• [ELEC-KEY] on the front panel can be used for a
straight key or external electronic keyer. Deactivate the
internal electronic keyer in keyer set mode. (p. 4-12)
@4 EXTERNAL KEYPAD JACK [EXT KEYPAD]
(p. 2-6)
Connects an external keypad for direct voice mem-
ory or electronic keyer control.
Transceiver mute control line (both transmit and re-
ceive) is also supported.
@5 METER JACK [METER] (p. 2-6)
Outputs the receiving signal strength level signal,
transmit output power, VSWR, ALC, speech com-
pression, VD or ID level for external meter indication.
@6 DC OUTPUT JACK [DC OUT] (p. 2-6)
Outputs a regulated 14 V DC (approx.) for external
equipment. Connected in parallel with 13.8 V out-
puts of [ACC 1] and [ACC 2]. (max. 1 A in total)
@7 REFERENCE SIGNAL INPUT/OUTPUT
TERMINAL [REF I/O]
Inputs/outputs a 10 MHz reference signal.
@8 S/P DIF INPUT TERMINAL [S/P DIF– IN] (p. 2-6)
@9 S/P DIF OUTPUT TERMINAL [S/P DIF– OUT]
(p. 2-6)
Connects external equipment that supports S/P DIF
input/output.
#0 CI-V REMOTE CONTROL JACK [REMOTE]
(p. 2-5)
➥ Connects a PC via the optional CT-17
CI-V LEVEL
CONVERTER for external control of the transceiver.
➥ Used for transceive operation with another Icom
CI-V transceiver or receiver.
#1 RS-232C TERMINAL [RS-232C] (p. 2-5)
Connects an RS-232C cable, D-sub 9-pin to con-
nect the IC-7800 to a PC.
Can be used for remotely control the IC-7800 with-
out the optional CT-17, or for RTTY/PSK31 de-
coded signal output. The [RS-232C] interface is
wired as a modem (DCE).
#2 KEYBOARD CONNECTOR [KEYBOARD]
(p. 2-6)
Connects a PC keyboard for RTTY and PSK31 op-
erations.
• USB (Universal Serial Bus) keyboard is supported.
#3 EXTERNAL DISPLAY TERMINAL
[EXT-DISPLAY] (p. 2-6)
Connects to an external display monitor.
• At least 800×600 pixel display is necessary.
#4 ETHERNET CONNECTOR (p. 16-6)
Connects to a PC through a LAN (Local Area Net-
work).
