ICOM 217800 Manuale Utente
2
1
PANEL DESCRIPTION
1
i
RF GAIN CONTROL/SQUELCH CONTROL
[RF/SQL]
[RF/SQL]
(outer control)
Adjusts the RF gain and squelch threshold level.
The squelch removes noise output from the
speaker (closed condition) when no signal is re-
ceived.
The squelch removes noise output from the
speaker (closed condition) when no signal is re-
ceived.
• The squelch is particularly effective for FM. It is also
available for other modes.
• 12 to 1 o’clock position is recommended for any setting
of the [RF/SQL] control.
• The control can be set as ‘Auto’ (RF gain control in SSB,
CW and RTTY; squelch control in AM and FM) or
squelch control (RF gain is fixed at maximum) in set
mode as follows. (p. 98)
squelch control (RF gain is fixed at maximum) in set
mode as follows. (p. 98)
• When setting as RF gain/squelch control
• When functioning as RF gain control
(Squelch is fixed open; SSB, CW, RTTY only)
• When functioning as squelch control
(RF gain is fixed at maximum.)
While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
o
RF POWER CONTROL [RF POWER]
Continuously varies the RF output power from min-
imum
imum
(5 W*)
to maximum
(100 W*)
.
* AM mode: 5 W to 40 W
!0
S/RF METER
(p. 31)
Shows the signal strength while receiving. Shows
the relative output power, SWR, ALC or compres-
sion levels while transmitting.
the relative output power, SWR, ALC or compres-
sion levels while transmitting.
!1
MONITOR SWITCH [MONITOR]
(p. 69)
Monitors your transmitted IF signal.
• The CW sidetone functions regardless of the [MONI-
TOR] switch setting in CW mode.
• The [MONITOR] indicator in this switch lights green
when the function is activated.
!2
ANTENNA TUNER SWITCH [TUNER]
(p. 88)
➥Turns the internal antenna tuner ON and OFF
(bypass)
when pushed momentarily.
➥Tunes the antenna manually when pushed for 1
sec.
• The [TUNER] indicator in this switch lights red when
the function is activated or blinks during manual tun-
ing.
ing.
• When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.
RF POWER
Increases
Decreases
Squelch is
open.
open.
S-meter
squelch
squelch
S-meter squelch
threshold
threshold
Noise squelch
threshold
(FM mode)
threshold
(FM mode)
Shallow
Deep
Noise squelch (FM mode)
Minimum RF gain
Adjustable
range
range
Maximum
RF gain
RF gain
Recommended level
RF gain
adjustable
range
adjustable
range
Maximum
RF gain
RF gain
S-meter
squelch
squelch
Noise squelch (FM mode)
Squelch is
open.
open.
MODE
SSB, CW
RTTY
AM, FM
AUTO
RF GAIN
SQL
SQL
SET MODE SETTING
SQL
SQL
RF GAIN + SQL
RF GAIN + SQL
RF GAIN + SQL