Icom IC-7700 Instruction Manual - Page 147

Receive antenna I/O setting

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D Receive antenna I/O setting Band keys RX-I/O F-1 10 ANTENNA TUNER OPERATION In the default setting, receive antenna connectors, [RX ANT-IN] and [RX ANT-OUT], on the rear panel are deactivated and are connected internally by the switching relay. If you want to connect an external preamp or low-pass filter between the [RX ANT-IN] and [RX ANTOUT], you must activate them as described below. q Select the antenna set screen. w Select the desired frequency band with a band key. e Push [RX-I/O] F-1 to activate the receive antenna connectors ([RX ANT-IN] and [RX ANT-OUT]). • "RX-I/O" indicators appear when [RX ANT-IN] and [RX- ANT-OUT] are active. r Repeat steps w and e, if desired. t Push EXIT/SET to exit antenna set screen. "RX-I/O" indicators appear when [RX ANT-IN] and [RX ANT-OUT] are active. Transceiver Transmitter Transmit/Receive ANT switching circuit Receiver IN [RX ANT] OUT Preamp or Low-pass filter, etc. 10-5

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10-5
10
ANTENNA TUNER OPERATION
D
Receive antenna I/O setting
In the default setting, receive antenna connectors, [RX
ANT-IN] and [RX ANT-OUT], on the rear panel are de-
activated and are connected internally by the switch-
ing relay. If you want to connect an external preamp or
low-pass filter between the [RX ANT-IN] and [RX ANT-
OUT], you must activate them as described below.
q
Select the antenna set screen.
w
Select the desired frequency band with a band key.
e
Push [RX-I/O]
to activate the receive antenna
connectors ([RX ANT-IN] and [RX ANT-OUT]).
• “RX-I/O” indicators appear when [RX ANT-IN] and [RX-
ANT-OUT] are active.
r
Repeat steps
w
and
e
, if desired.
t
Push
to exit antenna set screen.
EXIT/SET
F-1
“RX-I/O” indicators appear when [RX ANT-IN]
and [RX ANT-OUT] are active.
Band keys
F-1
RX-I/O
Receiver
Preamp or
Low-pass filter,
etc.
Transmitter
Transceiver
IN
[RX ANT]
OUT
Transmit/Receive
switching circuit
ANT