Kenwood TS-2000 Operation Manual - Page 67

Noise Blanker, Pre-amplifier, Attenuator, 7/ Nb/ Level], Func], Multi/ Ch, Pre/ Lock A], Att/ F Lock]

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NOISE BLANKER Noise Blanker was designed to reduce pulse noise such as that generated by automobile ignitions. Noise Blanker does not function in FM mode. Press [7/ NB/ LEVEL] to toggle between the Noise Blanker ON and OFF. • "NB" appears when the function is ON. 12 REJECTING INTERFERENCE ATTENUATOR The Attenuator reduces the level of received signals. This function is useful when there is strong interference from adjacent frequencies. Press [ATT/ F LOCK] to toggle the Attenuator ON and OFF. • "ATT" appears when the function is ON. You can further adjust the Noise blanker level from 1 to 10. The default level is 6. Press [FUNC], [7/ NB/ LEVEL], then turn the MULTI/ CH control to adjust the noise blanker level. • "NB LEVEL" and the current level appear on the sub dot-matrix display. Note: Noise Blanker is available only for the main transceiver in SSB, CW, FSK, and AM modes. PRE-AMPLIFIER Switching the Pre-amplifier OFF may help reduce interference from adjacent frequencies. Press [PRE/ LOCK A] to toggle between the Pre-amplifier ON and OFF. • "PRE" appears when the function is ON. The ON/OFF setting will be automatically stored in the current band. Each time you select the same band, the same setting will be automatically selected. The frequency range of each band is provided in the following table (under "ATTENUATOR"). Note: If the same frequency (144 MHz or 430 (440) MHz) band is selected on both the main transceiver and the sub-receiver, the pre-amplifier can be switched ON or OFF for both receivers. This is because the main transceiver and sub-receiver share the same antenna. The ON/OFF setting will be automatically stored in the current band. Each time you select the same frequency band, the attenuator setting will be automatically recalled. The frequency range of each band is shown below. Frequency Bands (MHz) 0.03 ~ 2.5 2.5 ~ 4.1 4.1 ~ 7.5 7.5 ~ 10.5 10.5 ~ 14.5 14.5 ~ 18.5 18.5 ~ 21.5 21.5 ~ 25.5 25.5 ~ 30.0 30.0 ~ 60.0 118 ~ 300 300 ~ 512 1240 ~ 1300 Pre-amplifier (Default) OFF Attenuator (Default) OFF OFF OFF OFF OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF Always ON Always OFF Note: ◆ If the same frequency (144 MHz or 430/ 440 MHz) band is selected on both the main transceiver and the sub-receiver, the attenuator can be switched ON or OFF for both receivers. This is because the main transceiver and sub-receiver share the same antenna. ◆ Available receiving frequencies in the above frequency bands vary, depending on the market code. Refer to the Specifications {page 106} for details. ◆ If 118 ~ 135.995 MHz, 155 ~ 173.995 MHz or 220 ~ 229.995 MHz is selected for the sub-receiver, the pre-amplifier cannot be turned ON (K-type only). 57

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57
12
REJECTING INTERFERENCE
NOISE BLANKER
Noise Blanker was designed to reduce pulse noise
such as that generated by automobile ignitions.
Noise Blanker does not function in FM mode.
Press
[7/ NB/ LEVEL]
to toggle between the Noise
Blanker ON and OFF.
•
“NB” appears when the function is ON.
You can further adjust the Noise blanker level from
1 to 10.
The default level is 6.
Press
[FUNC]
,
[7/ NB/ LEVEL]
, then turn the
MULTI/ CH
control to adjust the noise blanker level.
•
“NB LEVEL” and the current level appear on the
sub dot-matrix display.
Note:
Noise Blanker is available only for the main transceiver in
SSB, CW, FSK, and AM modes.
PRE-AMPLIFIER
Switching the Pre-amplifier OFF may help reduce
interference from adjacent frequencies.
Press
[PRE/ LOCK A]
to toggle between the
Pre-amplifier ON and OFF.
•
“PRE” appears when the function is ON.
The ON/OFF setting will be automatically stored in
the current band.
Each time you select the same
band, the same setting will be automatically selected.
The frequency range of each band is provided in the
following table (under “ATTENUATOR”).
Note:
If
the same frequency (144 MHz or 430 (440) MHz) band is
selected on both the main transceiver and the sub-receiver, the
pre-amplifier can be switched ON or OFF for both receivers.
This
is because the main transceiver and sub-receiver share the same
antenna.
ATTENUATOR
The Attenuator reduces the level of received signals.
This function is useful when there is strong
interference from adjacent frequencies.
Press
[ATT/ F LOCK]
to toggle the Attenuator ON
and OFF.
•
“ATT” appears when the function is ON.
The ON/OFF setting will be automatically stored in
the current band.
Each time you select the same
frequency band, the attenuator setting will be
automatically recalled.
The frequency range of each band is shown below.
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Note:
◆
If the same frequency (144 MHz or 430/ 440 MHz) band is
selected on both the main transceiver and the sub-receiver, the
attenuator can be switched ON or OFF for both receivers.
This is
because the main transceiver and sub-receiver share the same
antenna.
◆
Available receiving frequencies in the above frequency bands
vary, depending on the market code.
Refer to the Specifications
{page 106} for details.
◆
If 118 ~ 135.995 MHz, 155 ~ 173.995 MHz or 220 ~ 229.995 MHz
is selected for the sub-receiver, the pre-amplifier cannot be turned
ON (K-type only).