Asic Transmit Operation - Icom IC-7851 Instruction Manual

Before transmitting, monitor your selected operating frequency to make sure you don't cause interfer-
ence to other stations on the same frequency. It's good amateur practice to listen first, and then, even if
nothing is heard, ask "is the frequency in use" once or twice, before you being operating.
■ Basic transmit operation
D Transmitting
q Push [TRANSMIT] or [PTT] (microphone) to trans-
mit.
• The Main band's [TX] indicator lights red.
• When split operation is selected, the Sub band's [TX]
indicator lights.
w Push [TRANSMIT] again or release [PTT] (micro-
phone) to receive.
✔ Adjusting the transmit output power
➥ Rotate [RF PWR].
• Adjustable range: Less than 5 W to 200 W
(AM mode: Less than 5 W to 50 W)
D Adjusting the microphone gain
q Push the Multi-function [METER]() key to select
the ALC meter.
w Push [PTT] to transmit.
• Talk into the microphone at your normal voice level.
e While talking, rotate [MIC] so that the ALC meter
reading doesn't go outside the ALC zone (see to
the right).
r Release [PTT] to receive.
[TRANSMIT]
[RF PWR] TX indicator (MAIN)
TX power readout (approx.)
"<5W" is displayed when the power is set less than 5 W.
[TRANSMIT]
[MIC] TX indicator (MAIN)
ALC zone
1
S
0
I
D
Po
SWR
COMP
4-13
BASIC OPERATION
9 +
20
5
+
40
+
60dB
5
10
50 100 150
15
200
10 A
0
250
2
3
W
1.5
20
10
1
0
dB
ALC 44 52V
V
D
4