Meter Function; Swr Reading - Icom IC-756PROIII Instruction Manual

3
BASIC OPERATION

■ Meter function

The transceiver has 4 transmit meter functions for your
convenience. Select the desired meter with the
[METER] switch.
• Analog transmit meter
➥ Push [METER] to select RF power
or compression level
[METER]
DISPLAY
INDICATION
Indicates the relative RF output power in %.
Po
Indicates the SWR over the transmission
SWR
line.
Indicates the ALC level. When the meter
movement shows the input signal level ex-
ceeds the allowable level, the ALC limits
ALC
the RF power. In such cases, reduce the
[MIC GAIN] control.
Indicates the compression level when the
COMP
speech compressor is in use.

■ SWR reading

The SWR meter indicates the SWR over the transmis-
sion line in all modes.
q Push [TUNER] to turn the antenna tuner OFF.
w Push [METER] several times to select the Po
meter.
e Push [CW/RTTY] once or twice to select RTTY
mode.
r Push [TRANSMIT].
t Rotate [RF POWER] clockwise past the 12 o'clock
position for more than 30 W output power (30%).
y Push [METER] once to select the SWR meter as
the transmit meter.
u Read the SWR on the SWR meter.
31
, SWR, ALC
(Po)
.
(COMP)
MEASUREMENT
In addition, the transceiver can display the multi-func-
tion digital meter in the LCD display, which displays all
transmit meters simultaneously.
• Multi-function digital meter
q Push [METER] for 1 sec. to turn the multi-function
digital meter ON.
w Push [(F-1)P-HOLD] to toggle the peak level hold
function ON or OFF.
• "P-HOLD" appears on the window title when the peak
level hold function is turned ON.
ANT ANT
BW BW 2.4k 2.4k 0
SFT SFT
1
VFO VFO U S B U S B
TX T X
qr.qot.pp
METER METER
Po Po
1 14.100.00 14.100.00
P.AMP P.AMP
1
VFO VFO USB USB
qr.wpt.pp
ATT ATT
OFF OFF
14.100.00 14.100.00
1
P-HOLD P-HOLD MULTI-FUNCTION METER MULTI-FUNCTION METER
AGC AGC
. 1 . . . 3 . . . 5 . . . 7 . . . 9 . . 1 . . . 3 . . . 5 . . . 7 . . . 9 . ..
MID MID
S
P o P o
VOX VOX
0∑∑∑∑∑∑∑∑∑∑∑ ∑∑∑∑∑∑∑∑∑∑∑25 25∑∑∑∑∑∑∑∑∑ ∑∑∑∑∑∑∑∑∑∑50 ∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑
OFF OFF
A L C AL C
C O M P C OM P
0 5
COMP COMP
OFF OFF S W R SW R
1 1 . 5 1 .5 2
WIDE WIDE
P-HOLD P-HOLD
e Push [METER] for 1 sec. or push [EXIT/SET] to
turn the multi-function digital meter OFF.
Less than 1.5:1
5
1
25 50
10
0
S
2
Po
1.5
1
10
SWR 0
COMP
ALC
The built-in antenna tuner matches the transmitter
to the antenna when the SWR is lower than 3 : 1.
qw:pp
12:00 12:00
FIL2 FIL2
USB USB
FIL2 FIL2
USB USB
..+20 +20... ...+40 +40... ...+ 6 0 d B +6 0d B
∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑∑ 100% 100%
10 15 20 20 dB
2 . 5 2. 5 3
SWR meter
9
+ 20
+ 40
+ 60dB
100
3
20
dB