Icom IC-77 Instruction Manual page 13

OPERATION 2
Basic transmitting
© CAUTION: Transmitting under the following con-
= ditions may damage the transceiver:
— Before tuning.
— While the through indicator appears on the func-
tion display.
= CAUTION: Transmitting without an antenna may
< damage the transceiver.
After completing the receiving procedures on pgs. 7
and 8, perform transmitting. To prevent interference,
listen on the channel before transmitting. Re-tuning is required each time you change a
=: channel.
1) If an optional AT-130 HF AUTOMATIC ANTENNA
TUNER is connected, push the [TUNE] switch. 2) Adjust the [MIC] control to the 10 — 12 0'clock po-
sition.
The tine indicator blinks: $ e Refer to "Microphone gain control' below for details.
TUNEZ
EEF, NK
3) If required, adjust the [RF PWR] control as
TEDT TT] described below.
e The tune indicator appears continuously after tuning l l f
is complete. 4) Push and hold the [PTT] switch, and speak into the
microphone.
The through indicator appears when the e DO NOT hold the microphone too close to your mouth
connected antenna cannot be tuned. or speak too loudly. This may distort the signal.
The transmit indicator appears.
e |f the AT-130 cannot tune the connected antenna, the
through indicator appears. In this case, the AT-130
is bypassed and the [ANT] connector is directly con-
nected to the antenna.
5) Release the [PTT] switch to receive.
Microphone gain control When rotated too far counterclockwise, output pow-
Adjust the [MIC] control to the 10 — 12 o'clock posi- er becomes too low. When rotated too far clockwise,
tion when using the supplied hand microphone. transmit audio may distort.
Recommended position
Suitable position differs according to the connected for the supplied
microphone. microphone MIC
( j Increases
Decreases
RF power control REPWR
If required, adjust RF output power level.
a ERTE ( Q
) increases
lf maximum RF output power is not required, decrease ieee / \ (ak: AGO
it to save vehicle's battery power. l *AM mode: 25 W
CW operation For better CW receiving, an optiona! FL-52A or FL-53A
For CW mode operation, optional setting is required CW NARROW FILTER can be installed at your Icom
at your Icom Dealer. Connect a CW key to the [KEY] Dealer.
jack on the rear panel. Refer to p. 11 for details.
IE oes Center frequency Passband width
FL-52A 455 kHz 500 Hz/-—6 dB
FL-53A 455 kHz 250 Hz/-—6 dB
The transceiver transmits when the key is down, and
receives when the key is up.
NOTE: The Philippine version has no CW mode
capability.
10