Icom IC-7700 Instruction Manual - Page 23

S/p Dif Output Terminal [s/p Dif- Out]

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1 PANEL DESCRIPTION !5 S/P DIF INPUT TERMINAL [S/P DIF- IN] (p. 2-7) !6 S/P DIF OUTPUT TERMINAL [S/P DIF- OUT] (p. 2-7) Connects external equipment that supports S/P DIF input/output. !7 ALC LEVEL ADJUSTMENT POT [ALC ADJ] Adjusts the ALC levels. No adjustment is required when the ALC output level of a connected non-Icom linear amplifier is 0 to -4 V a DC. !8 ALC INPUT JACK [ALC] (p. 2-8) Connects to the ALC output jack of a non-Icom linear amplifier. !9 T/R CONTROL JACK [RELAY] (p. 2-8) Connects to ground when transmitting to control an external 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 MOSFET switching). @0 ACCESSORY SOCKET 1 [ACC 1] @1 ACCESSORY SOCKET 2 [ACC 2] Enable connection of external equipment such as a linear amplifier, an automatic antenna selector/ tuner, a TNC for data communications, etc. • See p. 2-11 for socket information. @2 EXTERNAL SPEAKER JACK [EXT-SP] (p. 2-6) Connects an external speaker (4-8 Ω), if desired. @3 EXTERNAL KEYPAD JACK [EXT KEYPAD] (p. 2-7) Connects an external keypad for direct voice memory or electronic keyer control. Transceiver mute control line (both transmit and receive) is also supported. @4 METER JACK [METER] (p. 2-7) Outputs a signal showing received signal strength, transmit output power, VSWR, ALC, speech compression, VD or ID level for external meter indication. @5 DC OUTPUT JACK [DC OUT] (p. 2-7) Outputs a regulated 14 V DC (approx.) for external equipment. Connected in parallel with 13.8 V outputs of [ACC 1] and [ACC 2]. (max. 1 A in total) _ + _ @6 TRANSVERTER CONNECTOR [X-VERTER] (p. 2-6) External transverter input/output connector. Activated by voltage applied to [ACC 2] pin 6, or when the transverter function is in use. (pgs. 2-11) @7 RECEIVE ANTENNA IN [RX ANT- IN] @8 RECEIVE ANTENNA OUT [RX ANT- OUT] Located between the transmit/receive switching circuit and receiver's RF stage. Connects an external unit, such as preamplifier or RF filter, using BNC connectors, if desired. When no external unit is connected, [RX ANT- IN] and [RX ANT- OUT] must be deactivated and shorted by the switching relay internally. This setting is available on the antenna set screen. (p. 10-5) Transmitter Transmit/Receive ANT switching circuit Receiver IN [RX ANT] OUT 1-13

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1-13
!
5
S/P DIF INPUT TERMINAL [S/P DIF– IN]
(p. 2-7)
!
6
S/P DIF OUTPUT TERMINAL [S/P DIF– OUT]
(p. 2-7)
Connects external equipment that supports S/P DIF
input/output.
!
7
ALC LEVEL ADJUSTMENT POT [ALC ADJ]
Adjusts the ALC levels.
No adjustment is required when the ALC output
level of a connected non-Icom linear amplifier is 0
to –4 V a DC.
!
8
ALC INPUT JACK [ALC]
(p. 2-8)
Connects to the ALC output jack of a non-Icom lin-
ear amplifier.
!
9
T/R CONTROL JACK [RELAY]
(p. 2-8)
Connects to ground when transmitting to control an
external unit, such as a non-Icom linear amplifier.
@
0
ACCESSORY SOCKET 1 [ACC 1]
@
1
ACCESSORY SOCKET 2 [ACC 2]
Enable connection of external equipment such as a
linear amplifier, an automatic antenna selector/
tuner, a TNC for data communications, etc.
• See p. 2-11 for socket information.
@
2
EXTERNAL SPEAKER JACK [EXT-SP]
(p. 2-6)
Connects an external speaker (4–8
Ω
), if desired.
@
3
EXTERNAL KEYPAD JACK [EXT KEYPAD]
(p. 2-7)
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.
@
4
METER JACK [METER]
(p. 2-7)
Outputs a signal showing received signal strength,
transmit output power, VSWR, ALC, speech com-
pression, V
D
or I
D
level for external meter indication.
@
5
DC OUTPUT JACK [DC OUT]
(p. 2-7)
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)
@
6
TRANSVERTER CONNECTOR [X-VERTER]
(p. 2-6)
External transverter input/output connector.
Activated by voltage applied to [ACC 2] pin 6, or
when the transverter function is in use. (pgs. 2-11)
@
7
RECEIVE ANTENNA IN [RX ANT– IN]
@
8
RECEIVE ANTENNA OUT [RX ANT– OUT]
Located between the transmit/receive switching cir-
cuit and receiver’s RF stage.
Connects an external unit, such as preamplifier or
RF filter, using BNC connectors, if desired.
When no external unit is connected, [RX ANT– IN]
and [RX ANT– OUT] must be deactivated and
shorted by the switching relay internally. This set-
ting is available on the antenna set screen. (p. 10-5)
NOTE:
T/R control voltage and current must be
lower than 16 V DC/0.5 A (or 250 V AC,
200 mA with MOSFET switching).
1
PANEL DESCRIPTION
Receiver
Transmitter
IN
[RX ANT]
OUT
Transmit/Receive
switching circuit
ANT
+
_
_