Icom IC-M803 Instruction Manual - Page 26

Other functions, Emergency FREQ channel, Noise Blanker function, Noise Blanker Level, Squelch function

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6 OTHER FUNCTIONS AND OPERATIONS ■ Other functions Emergency FREQ channel Select the Distress Voice Frequency. When this channel is selected, the Voice Frequency of a DSC call can be monitored without receiving or transmitting a DSC call. NOTE: When an Emergency FREQ channel is selected, the Voice Scrambler function cannot be turned ON. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push . • The channel is changed to an Emergency FREQ channel and is displayed in the Channel area. 3. Rotate [CH/GRP] or push [▲] or [▼] to select a channel. Noise Blanker function The Noise Blanker function reduces pulse-type noises that come from engine ignitions. However, if the received strong signals are distorted, adjust the Noise Blanker level or turn OFF the function. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push to turn the function ON or OFF. L When the function is ON, "NB" is displayed in the Status area. Noise Blanker Level When the Noise Blanker function is ON, adjust the Noise Blanker level to reduce various pulse-type noises. Set to between 1 and 10. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push . • The NB level setting window is displayed. 3. Push or to adjust the Noise Blanker level. Squelch function The Squelch function mutes unwanted signals such as noise or unmodulated beat signals. This function enables quiet standby. However, when you need to receive weak signals, adjust the Squelch level, or turn OFF the function. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push to turn the function ON or OFF. L When the function is ON, "SQL" is displayed in the Status area. S-meter Squelch Level When the Squelch function is ON, only signals stronger than this set level are received. Set to between 0 (open) and 100 (tight). 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push . • The S-SQL level setting window is displayed. 3. Push or to adjust the Squelch level. RF gain Level To receive weak signals, you can set the minimum RF (Radio Frequency) gain level needed. Set to between 0 and 9. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push . • The RF gain level setting window is displayed. 3. Push or to adjust the RF gain level. TX Power Change the output power level of the selected channel to High, Mid-H (Middle-High), Mid-L (Middle-Low), or Low temporarily. 1. Push [◄] or [►] until is displayed in the Software Key area. 2. Push . • The output power level is changed and the selected TX power is displayed. L If no indicator is displayed in the Information area, the TX power is set to "High." 18

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18
6
OTHER F¼NCTION» AND OPERATION»
■
Other functions
Emergency FREQ channel
»elect the Distress Voice Frequency. When this
channel is selected, the Voice Frequency of a D»C
call can be monitored without receiving or transmitting
a DSC call.
NOTE:
When an Emergency FREQ channel is
selected, the Voice Scrambler function cannot be
turned ON.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
.
•
The channel is changed to an Emergency FREQ
channel and
is displayed in the Channel
area.
3.
Rotate [CH/GRP] or push [▲] or [▼] to select a
channel.
Noise Blanker function
The Noise Blanker function reduces pulse-type noises
that come from engine ignitions.
However, if the received strong signals are distorted,
adjust the Noise Blanker level or turn OFF the function.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
to turn the function ON or OFF.
L
When the function is ON, “NB” is displayed in the
Status area.
Noise Blanker Level
When the Noise Blanker function is ON, adjust the
Noise Blanker level to reduce various pulse-type
noises.
Set to between 1 and 10.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
.
•
The NB level setting window is displayed.
3.
Push [◄]/[▼] or [▲]/[►]
to adjust the Noise
Blanker level.
Squelch function
The Squelch function mutes unwanted signals such
as noise or unmodulated beat signals. This function
enables quiet standby.
However, when you need to receive weak signals,
adjust the »quelch level, or turn OFF the function.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
to turn the function ON or OFF.
L
When the function is ON, “»QL” is displayed in the
Status area.
S-meter Squelch Level
When the »quelch function is ON, only signals
stronger than this set level are received.
Set to between 0 (open) and 100 (tight).
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
.
•
The »-»QL level setting window is displayed.
3.
Push [◄]/[▼] or [▲]/[►] to adjust the »quelch
level.
RF gain Level
To receive weak signals, you can set the minimum RF
(Radio Frequency) gain level needed.
Set to between 0 and 9.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
.
•
The RF gain level setting window is displayed.
3.
Push [◄]/[▼] or [▲]/[►] to adjust the RF gain level.
TX Power
Change the output power level of the selected channel
to High, ½id-H (½iddle-High), ½id-L (½iddle-Low), or
Low temporarily.
1.
Push [◄] or [►] until
is displayed in the
Software Key area.
2. Push
.
•
The output power level is changed and the selected
TX power is displayed.
L
If no indicator is displayed in the Information area, the
TX power is set to “High.”