Noise Blanker - Icom IC-905 Basic Manual

4
RECEIVING AND TRANSMITTING

Noise Blanker

SSB, CW, RTTY, and AM modes
The Noise Blanker eliminates pulse-type noise, such
as the noise from car ignitions.
1. Push .
• Opens the FUNCTION screen.
2. Touch [NB].
L Touching [NB] turns this function ON or OFF.
3. To close the FUNCTION screen, push
NOTE: When using the Noise Blanker, received
signals may be distorted if they are excessively
strong, or the noise is other than a pulse type. In that
case, turn OFF the Noise Blanker, or shallow the
DEPTH on the NB menu.
See the description below for details.
NB is OFF
Pulse-type noise
Desired signal
NB is ON
(DEPTH is too short)
Noise still exists
Desired signal
Portion of desired signal is also removed
.
Displayed
when the Noise
Blanker is ON.
NB is ON (Effective)
NB LEVEL
Desired signal
Noise removed
NB is ON
(WIDTH is too wide)
Desired signal
D Adjusting the NB level and time
To deal with various types of noise, you can adjust the
attenuation level and blanking depth and width in the
NB menu.
1. Push .
• Opens the FUNCTION screen.
2. Touch [NB] for 1 second.
• Turns ON the Noise Blanker and opens the NB
menu.
3. Touch the item to adjust. (Example: DEPTH)
4. Rotate to adjust the item. (Example: 8)
5. To close the NB menu, push
LEVEL
Adjusts the level where the Noise Blanker activates
between 0 and 100%.
DEPTH
Adjusts the noise attenuation level to between 1 and 10.
WIDTH
Adjusts the blanking duration time to between 1 and 100.
4-8
.
(Default: 50%)
(Default: 8)
(Default: 50)