Icom IC-7100 Advanced Instructions

3
BASIC OPERATION
3-19
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]
(L) control.
• 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. 17-18)
SET
> Function > RF/SQL Control
SET MODE
SETTING
OPERATING
MODE
[RF/SQL]
OPERATION
AUTO
AM/FM/WFM/
DV
Operates as only a squelch
control.
• RF gain is xed at maxi-
mum sensitivity.
SSB/CW/RTTY
Operates as only an RF
gain control.
• Squelch is xed open.
SQL
ALL
Operates as only a squelch
control.
• RF gain is xed at maxi-
mum sensitivity.
RF+SQL
(default)
FM/DV
Operates as an RF gain
control, and a noise squelch
or S-meter squelch.
SSB/CW/RTTY/
AM/WFM
Operates as an RF gain
control, and an S-meter
squelch.
❍ 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.
• Rotating [RF/SQL]
(L) past the threshold point activates
the S-meter squelch— this allows you to set a minimum sig-
nal level needed to open the squelch.
[RF/SQL]
• When used as an RF gain/squelch control
• When used as an RF gain control
(Squelch is fixed open; SSB, CW, RTTY only)
• When used as a squelch control
(RF gain is fixed at maximum.)
Maximum
RF gain
S-meter
squelch
Noise squelch (FM/DV modes)
Squelch is
open.
RF gain
adjustable
range
Recommended level
Minimum RF gain
Adjustable
range
Maximum
RF gain
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold
(FM/DV modes)
Shallow Deep
Noise squelch (FM/DV modes)
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)
Previous view

Icom IC-7100 Specifications

General

Supply	13.8 V DC ±15%
Voltage	13.8 V DC
Operating Temperature	-10°C to +60°C
Frequency Coverage	0.030-199.999 MHz, 400-470 MHz
Modes	SSB, CW, AM, FM, DV
Output Power	HF/50MHz: 100W, 144MHz: 50W, 430MHz: 35W
Receiver Type	Superheterodyne
Antenna Connector	SO-239 (HF/50MHz/144MHz), N-type (430MHz)
Weight	Main unit: 2.3 kg
Type	Base/Mobile
Frequency Range TX	1.8–54 MHz, 144–148 MHz, 430–450 MHz
Frequency Range RX	0.030–199.999 MHz, 400–470 MHz
Memories	505
Current Consumption	TX: 22 A, RX: 1.2 A