Yaesu FTDX-9000MP, Operation Manual

Page: 34 / 180

Page 32 FT
DX
9000MP O
PERATION
M
ANUAL
VDD TEMP SWR BIAS
NOTCH Switch
This button turns the Main band (VFO-A) IF notch
filter on and off. When the IF notch filter is acti-
vated, the LED inside the button will glow red.
The Notch Filter center frequency is adjusted via
the [
NOTCH
] knob (#
above).
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The width of the notch may be set to either
“Wide” or “Narrow” via Menu item #089 (
IF-
NOTCH-WIDTH ) in the RX DSP Menu
Group. Setting this selection to “Narrow” will
provide a very sharp notch, with minimal dis-
turbance to the incoming signal wave-form.
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When the External Display (not supplied) is
connected, you may use the Audio Scope on
the Audio Scope/Oscilloscope page on the
External Display to help you adjust the set-
ting of the Notch filter control for the opti-
mum performance. The effect of the Notch
filter adjustments will be easy to see on the
Audio Scope.
NOTCH Knob
This adjusts the center frequency of the Main band
(VFO-A) IF Notch filter, when engaged by the
[
NOTCH
] switch (#
below).
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The Sub band (VFO-B) frequency display will
show the Notch frequency for 5 seconds when-
ever the outer [
NOTCH
] knob is turned.
You may disable this feature (displaying the Notch
frequency) via Menu item “
DISPLAY 022
LEVEL INDICATOR .” See page 148 for details.
MNU Key
This key is used to engage the configuration Menu.
When this key is pressed the Menu Mode information will
appear on the LCD, allowing selection and adjustment of
the various Menu items.
Use the [
MAIN
] Tuning Dial (#
, described previously)
to select the desired Menu item, then use the [ CLAR/VFO-
B
] knob (#
, described later) to adjust the setting of the
selected Menu item. When you are done, press and hold
in the [
MNU
] key for two seconds to save the revised
settings and exit to normal operation.
AF GAIN RF GAIN Knobs
AF GAIN Knob
Clockwise rotation of this control increases the Volume
level. Typically, you will operate with this control set past
the 9 o’clock to 10 o’clock position.
RF GAIN Knob
This is the control that adjusts the gain of the Main band
(VFO-A) receiver’s RF and IF stages. Clockwise rotation
increases the gain level, and this control typically is left in
the fully clockwise position, which provides maximum
receiver gain.
Using the Menu, it is possible to change the [
RF GAIN
]
control (for the Main band (VFO-A)) to serve as the Sub
(VFO-B) [
AF GAIN
] control. In this case, the Menu Item
“ GENERAL 045 AF/RF DIAL SWAP ” will move the
Main (VFO-A) [ RF GAIN
] control function to the knob
normally utilized for the Sub (VFO-B) receiver’s [ AF
GAIN
] control. In this way, both the Main and Sub re-
ceiver [ AF GAIN
] controls will be on the same shaft, as
will the two receivers’ [ RF GAIN
] controls.
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