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changing in strength due to fading (QSB). You must manually control the RF
gain level so that you do not have distortion from the incoming signal
overloading the receiver. Set AGC to “off”, then go into the RF gain setting (Hold
the AGC button in for 2 seconds) then adjust the main knob until the signal
sounds clear. This can result in a nice improvement of signal quality under good
receiving conditions, especially for weak signals!
PRE-AMP/ATT (combined control)
The pre-amplifier can improve reception of some weak signals in the higher
frequency bands. These are normally the bands above 20 meters. When
adjacent signals are de-sensing the listened to station applying the attenuator
can help. This is normally on bands below 40m.
1. Press the [PRE] button at the bottom of the screen in momentarily and the
character P will appear on the top left corner of the screen indicating that the
pre-amplifier is turned on.
2. Press the [PRE] button again and the character A will appear on the top left
corner of the screen, indicating that the attenuator is turned on.
3. Press the [PRE] button again and no character will appear on the top left
corner of the screen, indicating that neither preamp nor attenuator are engaged.
■ The receiver is sensitive enough that under 18mhz, no improvement of the
signal to noise ratio will occur with use of the pre-amp. To maintain the best
reception performance, limit use of the pre-amp to bands above 20 meters.
■ When the S meter displays that the received signal exceeds S9+20dB, turning
on the attenuator is recommended to provide better reception.
Pulse Interface Suppressor – Noise Blanker
Pulse interference suppression can effectively eliminate some kinds of pulse
noise, especially interference caused by automobile ignition systems.
1. Press the [NB] button at the bottom of the screen momentarily to enter the
NB function setting - and a corresponding menu will display on the screen where
the DSP filter graphic normally is.
2. Repeated momentary presses of the [NB] button will select the different NB
function setting options. Rotate the main tuning knob to set these values.
The NB function menu includes the following options:
NBSW: NB operation switch ON/OFF. Default is OFF
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