10 REJECTING INTERFERENCE
PRE-AMPLIFIER
Switching the
Press [ATT/PRE/ ANT1/2] to cycle through “ATT” / “PRE” / “ ” (OFF) then return to “ATT”. Select “PRE” to turn the
•“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 table under “ATTENUATOR”.
ATTENUATOR
The Attenuator reduces the level of received signals. This function is useful when there is strong interference from adjacent frequencies.
Press [ATT/PRE/ ANT1/2] to cycle through “ATT” / “PRE” / “ ” (OFF) then return to “ATT”. Select “ATT” to activate the attenuator function. When it is ON, the signal is attenuated approximately 12 dB.
•“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.
Frequency Bands | Attenuator | ||
(MHz) | (Default) | (Default) | |
0.03 ~ 2.5 | OFF | OFF | |
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2.5 | ~ 4.1 | OFF | OFF |
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4.1 | ~ 6.9 | OFF | OFF |
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6.9 | ~ 7.5 | OFF | OFF |
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7.5 ~ 10.5 | ON | OFF | |
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10.5 | ~ 14.5 | ON | OFF |
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14.5 | ~ 18.5 | ON | OFF |
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18.5 | ~ 21.5 | ON | OFF |
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21.5 | ~ 25.5 | ON | OFF |
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25.5 | ~ 30.0 | ON | OFF |
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30.0 | ~ 60.0 | ON | OFF |
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CW REVERSE (RECEPTION)
This function pivots the BFO from the default position (USB) to another position (LSB) in CW mode. It is sometimes effective to remove the interfering signals from the IF passband by pivoting the BFO.
1Press [MODE] until “CW” appears.
2Press [MODE] (1 s).
•“CW” changes to “CWR”.
3To recover the default BFO position, press [MODE] (1 s) again.
•“CWR” changes to “CW”.
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