Icom IC-7851 Instruction Manual page 29

!3 USB PORT [USB B]
USB B type port connects to a PC.
• A USB A-USB B cable is required.
!4 ACCESSORY SOCKET [A ACC1]
ACCESSORY SOCKET [A ACC2]
ACCESSORY SOCKET [B ACC1]
ACCESSORY SOCKET [B ACC2]
Connects to external equipment such as a linear
amplifier, an automatic antenna selector/tuner, a
TNC for data communications, and so on.
• See
page 20-2 for detailed socket information.
!5 DC OUTPUT JACK [DC OUT]
Outputs regulated 14 V DC (approximately) for ex-
ternal equipment. Connected in parallel with 13.8 V
outputs of [ACC 1] and [ACC 2]. (maximum 1 A in
total)
_
!6 T/R CONTROL JACK [RELAY]
Goes to ground when transmitting to control an ex-
ternal unit, such as a non-Icom linear amplifier.
NOTE: T/R control voltage and current must be
lower than 16 V DC/0.5 A (or 250 V AC,
200 mA with MOS-FET switching).
!7 ALC INPUT JACK [ALC]
Connects to the ALC output jack of a non-Icom lin-
ear amplifier.
!8 ALC LEVEL ADJUSTMENT POT [ALC ADJ]
Rotate to adjust the ALC levels.
No adjustment is required when the ALC output lev-
el of the connected non-Icom linear amplifier is 0 to
–4 V DC.
!9 STRAIGHT KEY JACK [KEY]
Connects to a straight key or external electronic
keyer with 1 ⁄ inch standard plug.
4
• [ELEC-KEY] on the front panel can be used for a straight
key or external electronic keyer. Deactivate the internal
electronic keyer in the Keyer set screen.
@0 EXTERNAL KEYPAD JACK [EXT KEYPAD]
(p. 20-4)
Connects to an external keypad for direct voice
memory (p. 9-11), memory keyer
memory (p. 5-17) or PSK memory
mission.
A transceiver mute control line (both transmit and
receive) is also supported.
(p. 20-5)
+
_
(pp. 3-5, 20-4)
(p. 3-5)
(p. 20-3)
(p. 5-13)
_
+
(p. 5-10), RTTY
(p. 5-29) trans-
@1 METER JACK [METER]
Outputs the received signal strength, transmit out-
put power, VSWR, ALC, speech compression, V
I d levels for an external meter.
@2 CI-V REMOTE CONTROL JACK [REMOTE]
(p. 20-5)
➥
Connects to a PC through the optional CT-17
level converter
ceiver.
➥
Used for transceive operation with another Icom
CI-V transceiver or receiver.
@3 RECEIVE ANTENNA A OUT [RX ANT A– OUT]
@4 RECEIVE ANTENNA A IN [RX ANT A– IN]
Located between the transmit/receive switching cir-
cuit and the receiver's RF stage in the Sub band
(Main band in the split frequency mode).
Connects to an external unit, such as preamplifier
or RF filter, using BNC connectors, if desired.
When no external unit is connected, [RX ANT A–
IN] and [RX ANT A– OUT] must be deactivated
and internally shorted by the switching relay. This
setting is available in the
@5 TRANSVERTER CONNECTOR [X-VERTER]
(p. 20-4)
Connects to an external transverter for input/out-
put.
Activated by a voltage applied to [ACC 2] pin 6, or
when the transverter function is in use.
15-14)
@6 RECEIVE ANTENNA B OUT [RX ANT B– OUT]
@7 RECEIVE ANTENNA B IN [RX ANT B– IN]
Located between the transmit/receive switching cir-
cuit and receiver's RF stage in the Main band (Sub
band during split operation).
Connects an external unit, such as preamplifier or
RF filter, using BNC connectors, if desired.
When no external unit is connected, [RX ANT B–
IN] and [RX ANT B– OUT] must be deactivated
and internally shorted by the switching relay. This
setting is available in the
@8 REFERENCE SIGNAL INPUT/OUTPUT
TERMINAL [REF I/O]
Input or output for a 10 MHz reference signal.
1-13
PANEL DESCRIPTION
(p. 20-5)
for external control of the trans-
ANT screen. (p. 13-6)
(pp. 20-2,
ANT screen. (p. 13-6)
1
or
d
-
ci v