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Page 46 FT
DX
1200 OPERATING MANUAL
INTERFERENCE REJECTION
ATT
When extremely strong local signals or high noise degrades reception, you can use the
[
ATT
]
button to insert 6, 1, or
18-dB of 5F attenuation in front of the 5F ampli¿er.
1. 3ress the
[
ATT
]
button several times to set the de-
sired attenuation level, per the chart below.
OFF
$ttenuator is 2ff
-6dB
The incoming signal power is reduced by 6
dB Signal voltage reduced by 1)
-12dB
The incoming signal power is reduced by 1
dB Signal voltage reduced to 14)
-18dB
The incoming signal power is reduced by 18
dB Signal voltage reduced to 18)
The selected attenuation level will be indicated in
the $TT column of the .ey Function 'isplay on the
TFT display.
. To restore full signal strength through the $ttenua-
tor circuit area, press the
[
ATT
]
button to restore the
$TT display to the “2FF” position.
ADVICE:
If background noise causes a high S-meter indication on clear freTuencies, press the
[
ATT
]
button until the S-meter
drops to about “S-1”. This setting optimi]es the trade-off between sensitivity, noise, and interference immunity. $lso,
once you have tuned in a station you want to work, you may want to reduce sensitivity further add more attenua-
tion) by pressing the
[
ATT
]
button to a higher setting. This reduces the strength of all signals and noise) and can
make reception more comfortable, important especially during long QS2s. When looking for weak signals on a Tuiet
band, you will want maximum sensitivity, so the I32 should be disabled and the
[
ATT
]
button should be set to “2FF.”
This situation is typical during Tuiet times on freTuencies above 1 0H], and when using a small or negative-gain
receiving antenna on other bands.
[
ATT
]
Button
KEY FUNCTION DISPLAY
Indicates the
attenuation level
48


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  • Green Light on VFO A and MEM is flashing and no audio. Even tried Factory Reset and still flashing. How do I fix this? Submitted on 6-12-2022 at 07:37

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