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n
Attenuator
The attenuator prevents desired signals from distort-
ing when very strong signals are near the desired fre-
quency, or when very strong electric fields, such as
from broadcasting stations are near from your loca-
tion.
The attenuator can be set to both or either band sep-
arately, and the attenuation level can be set for each
band independently.
➥
Push [ATT] to turn the attenuator ON and OFF.
• “ATT” indicator appears when the attenuator is activated.
D
Setting the attenuation level
q
Push [M/S•BAND] or [SUB] to select the desired
band of the attenuation level to be set.
w
Push [SET] then [ATT] to enter the attenuator set
mode.
e
Rotate the tuning dial to select attenuation level.
• Push [M-CL 5] to return to the default value.
r
Push [SET] to exit the attenuator set mode.
NOTE: When using the noise blanker, received
audio may be distorted if they are excessively
strong.
n
Simple band scope
This function allows you to visually “sweep” an area
surrounding the set frequency for other signals. Detect-
ed signals are indicated graphically on the S-meter.
q
Set the operating frequency and mode.
w
Push [SWP 0] to turn the simple band scope func-
tion ON and OFF.
• “SWP” indicator flashes when the simple band scope
function is activated.
• Detected signals are indicated using the S-meter and
“
Z
” indicator, displayed above the S-meter, shows the
center frequency (displayed frequency).
• The signal availability is detected by the noise squelch
condition (open or close).
e
To monitor the detected signal, rotate the tuning dial
to set the appearing “dot” of the S-meter to below
the “
Z
” indicator.
• The frequency readout shows the detected signal fre
-
quency.
D
Setting sweeping time interval
q
Push [SET] then [SWP 0] to enter the sweep set
mode.
w
Rotate the tuning dial to select sweeping time inter-
val.
• Push [M-CL 5] to return to the default value.
e
Push [SWP 0] to exit the sweep set mode.
29
5
RECEIVE AND TRANSMIT
[ATT]
CW
VFO A
ATT
[SWP 0]
FM
V F O A
SWP
Indicates detected signals
Sweep center
Shows 10 channels around the displayed
frequency.
Attenuation levels
144 MHz/
0–100% variable
430(440) MHz bands Approx. 15 dB attenuation
at 100% setting
1200 MHz band
Approx. 20 dB fixed
(optional)
Содержание IC-910H
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