Icom IC-7300, Основное руководство

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3
BASIC OPERATION
3-9
RF gain and SQL level
Rotate
AF RF/SQL
(outer) to adjust the RF gain and
SQL level.
By default, rotating to left (when set to the 12 o’clock
position) adjusts the RF gain, and rotating to right
adjusts the squelch level as described below.
RF gain
Adjust the RF gain to decrease the noise received
from a nearby strong station.
• Rotate counterclockwise to reduce the RF gain, which
reduces the receive sensitivity. “RFG” indicates that the RF
gain is reduced.
L
If a strong signal is received and “OVF” (Overflow)
appears, reduce the RF gain until “OVF” disappears.
SQL level
There are 2 types of SQL level, depending on the
operating mode.
• Noise squelch
Rotate the
AF RF/SQL
(outer) until the noise just
disappears and the TX/RX indicator goes OFF.
• S-meter squelch
The S-meter squelch disables the audio output from
the speaker or headphones when the received signal is
weaker than the specified S-meter squelch level.
Rotate the
AF RF/SQL
clockwise from the 12 o’clock
position to adjust the S-meter threshold level.
L
You can change the
AF RF/SQL
(outer) control type in
“RF/SQL Control.” (p. 8-3)
MENU
» SET > Function > RF/SQL Control
Noise squelch (FM mode)
Maximum RF gain
S-meter squelch
adjustable range
Maximum S-meter
squelch
Squelch is open
RF gain
adjustable range
Minimum RF gain
is displayed
Dial Lock function
The Dial Lock function prevents frequency changes
caused by accidently moving
MAIN DIAL
.
L
This function electronically locks the dial.
Hold down
Adjusting the transmit output
power
Before transmitting, monitor your selected operating
frequency to make sure you do not cause interference to
other stations on the same frequency. It is good amateur
practice to listen first, and then, even if nothing is heard,
ask if the frequency in use once or twice, before you start
operating.
D
Adjusting the transmit output power
1. Set the operating mode to SSB, CW, RTTY or FM.
(p. 3-2)
(Example: USB)
2. Touch the meter to display the Po meter. (p. 3-10)
3. Open the Multi-function menu.
Lights red
Push
4. Push
TRANSMIT
or hold down [PTT].
• The Po meter level changes according
to your voice level in the SSB mode.
• The TX/RX indicator lights red and
is displayed.
5. Touch “RF POWER.”
6. Adjust the transmit output power to between 0 and
100%.
Po meter
Rotate
Push
• The Po meter displays the RF output power in a
percentage. It becomes the S-meter while receiving.
7. Push
TRANSMIT
or release [PTT].
• Returns to receive.
Hold down
SPEECH
for 1 second to turn the
Dial Lock function ON or OFF.
• “ ” is displayed while the function is ON.
• During Split Frequency operation, the Split
Lock function may be turned ON. (p. 8-4)
MENU
» SET > Function > Lock Function
Hold down
1. Push
TRANSMIT
or [PTT] to transmit.
• The TX/RX indicator lights red and is displayed
while transmitting.
2. Push
TRANSMIT
or release [PTT].
• Returns to receive.
Basic transmission