Operating Controls; 4 - 1 Front Panel - Icom IC-730 Instruction Manual

SECTION 4 OPERATING CONTROLS
4 – 1 Front Panel
1. MODE SWITCH
This switch selects the mode of operation for both transmit
and receive.
USB Upper Sideband, mainly for 10, 14, 18, 21, 24 and
28MHz bands.
LSB Lower Sideband, mainly for 3.5 and 7M Hz bands.
CW Continuous Wave, for CW operation on all bands.
CW-N Narrow CW. The narrow crystal filter is auto-
matically turned ON in this position to improve
selectivity when receiving. (When optional crystal
filter installed)
AM Amplitude Modulation.
2. POWER SWITCH
The POWER SWITCH is a push-lock type switch which
controls the input DC power to the IC-730. When the
external AC power supply (IC-PS15) is used, the switch also
acts as the AC power suppl y switch. When the switch is
pushed in arid locked, power is supplied to the set. When
the switch is pushed again and released, power is cut to all
circuits except the PA unit. (When the BC-10A is used,
power will also be supplied to the CPU. (Refer to page 3.)
3. MIC CONNECTOR
Connect the supplied microphone or optional microphone, IC-
SM5 or IC-H M10 to this jack. If you wish to use a different
microphone, refer to the drawing on page 4.
4. PHONES JACK
Accepts a standard 1/4-inch headphone plug for headphones
of 4 ~ 16 ohms. Stereo phones can be used without modi-
fication.
5. MIC GAIN CONTROL
Adjusts the level of modulation according to the in put of the
microphone. Clockwise rotation increases the microphones
gain. As the in put will vary with different microphones and
different voices, the knob should be turned until the Meter
needle, in the ALC mode, begins to move slightly within the
ALC zone. In SSB and AM modes, when the speech
processor is in use, the MIC GAIN CONTROL sets the
clipping limits, while the RF POWER CONTROL sets the RF
drive level to the maximum power level, where ALC starts at
the saturation point of the amplifiers.
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