Receive And Transmit; Mode Selection; Squelch And Rf Gain; Rf Gain And Squelch - Icom IC-718 Instruction Manual

5

RECEIVE AND TRANSMIT

n Mode selection
The following modes are available in the IC-718:
SSB (LSB/USB), CW, CW REV (CW reverse), RTTY,
RTTY REV (RTTY reverse) and AM.
 Push [MODE] one or more times to select desired
operation mode.
 Push [MODE] for 1 sec. to toggle between USB
and LSB. (SSB mode only)
 Push [MODE] for 1 sec. to toggle between CW
and CW reverse or RTTY and RTTY reverse. (CW
and RTTY mode only)
• The selected mode is indicated in the function display.
Note: If desired mode cannot be selected, it's use
may inhibited by initial set mode. (p. 44)
n RF gain and Squelch
The IC-718 uses the same control, [RF/SQL], to
adjust either the RF gain or the squelch. [RF/SQL]
adjusts either the RF gain or the squelch depending
on the operating mode selected and the condition of
the RF/SQL item in initiaset mode (p. 44).
• [RF/SQL] control priority
Set mode
setting
rS (RF/SQL)
(default)
At (AUTO)
Sq (SQL)
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF (Radio Frequency) gain is used to adjust the
receiver gain.
• Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the 12
o'clock position since this sets RF gain to the max.
The SQUELCH removes noise output from the
speaker (closed condition) when no signal is received.
The squelch is available for the other modes.
• A segment appears in the S-meter to indicate the
S-meter squelch level.
20
USB, LSB,
AM
CW, RTTY
RF/SQL
RF/SQL
RF GAIN SQL*
SQL*
SQL*
OPERATING MODE SELECTION
OPERATING MODE SELECTION
USB LSB
CW CW
RTTY RTTY
AM
• When set as the [RF/SQL] control
Maximum RF gain
Squelch is open.
RF gain adjustable
range
• When set as the [SQL] control
Squelch is open.
Shallow
• When set as the [RF] control
Maximum RF gain
Adjustable range
Minimum RF gain
MODE
Push
momentarily
MODE
Push
for 1 sec.
S-meter squelch
threshold
S-meter squelch
S-meter squelch
threshold
S-meter squelch
Deep