Icom IC-7100 Basic Manual page 51

Squelch and receive (RF) sensitivity
Adjusts the RF gain and squelch threshold level. The
squelch removes noise output to the speaker when no
signal is received (closed squelch).
• The squelch is particularly effective for AM and FM, but also
works in other modes.
• The 12 to 1 o'clock position is recommended for the most
effective use of the [RF/SQL]
• The [RF/SQL] (L) control operates as only an RF gain
control (Squelch is fixed open), or a squelch control (RF
gain is fixed at maximum sensitivity) depending on the "RF/
SQL Control" option in the "Function" Set mode. (p. 6-5)
> Function > RF/SQL Control
SET
OPERATING
SET MODE
MODE
SETTING
A M / F M / W F M /
DV
AUTO
SSB/CW/RTTY
ALL
SQL
FM/DV
RF+SQL
(default)
SSB/CW/RTTY/
AM
❍ Adjusting RF gain (Receive sensitivity)
Normally, [RF/SQL] (L) is set to the 12 o'clock posi-
tion.
Rotate [RF/SQL] (L) to the 11 o'clock position for
maximum sensitivity.
• Rotating counterclockwise from the maximum position re-
duces sensitivity.
• The S-meter indicates receive sensitivity.
While rotating the RF gain control, a faint noise may
be heard. This comes from the DSP unit and does
not indicate an equipment malfunction.
❍ Adjusting squelch (Removing non-signal noise)
Rotate [RF/SQL] (L) clockwise when no signal is re-
ceived, until the noise just disappears.
• The TX/RX LED light goes out.
(L)
• Rotating [RF/SQL]
the S-meter squelch— this allows you to set a minimum sig-
nal level needed to open the squelch.
(L) control.
[RF/SQL]
OPERATION
Operates as only a squelch
control.
• RF gain is fixed at maxi-
mum sensitivity.
Operates as only an RF
gain control.
• Squelch is fixed open.
Operates as only a squelch
control.
• RF gain is fixed at maxi-
mum sensitivity.
Operates as an RF gain
control, and a noise squelch
or S-meter squelch.
Operates as an RF gain
control, and an S-meter
squelch.
past the threshold point activates
The L, R, C or D in the instructions indicate the
part of the controller.
L: Left side, R: Right side, C: Center bottom
D: Display (Touch screen)
[RF/SQL]
• When used as an RF gain/squelch control
Squelch is
open.
RF gain
adjustable
range
• When used as an RF gain control
(Squelch is fixed open; SSB, CW, RTTY only)
Adjustable
range
Minimum RF gain
• When used as a squelch control
(RF gain is fixed at maximum.)
Noise squelch (FM/DV modes)
Noise squelch
threshold
(FM/DV modes)
Squelch is
open.
Shallow
3-19
BASIC OPERATION
Noise squelch (FM/DV modes)
Recommended level
Maximum
RF gain
S-meter
squelch
Maximum
RF gain
S-meter squelch
threshold
S-meter
squelch
Deep
3