Audio Filter Operation - Yaesu FTDX9000MP Operation Manual

T T T T T C C C C C
OOLS FOR OOLS OOLS FOR FOR FOR OMFOR OMFOR OMFORT T T T T ABLE
OOLS OOLS FOR OMFOR OMFOR
The left [ FILTER ( A )] switch on the FPS-9000H allows adjustment of the left speaker audio response, while the [ FILTER ( B )]
switch on the FPS-9000H allows tailoring of the right side speaker's audio response.
The optimum filter setting will depend on the operating mode and band/noise conditions. For example:
SSB operation
Setting the HIGH CUT filter to 2.4 kHz will cause audio
components above that frequency to be attenuated at a rate
of –6 dB per octave. This will cut high-pitched noise, and
give the audio a more mellow sound.
CW operation
Setting LOW CUT to 500 Hz, and HIGH CUT to 700 Hz,
will create a bandpass filter with its peak at 600 Hz.
AM and FM operation
You will want to begin operation in the "NORM" (Nor-
mal) position, corresponding to the widest fidelity avail-
able. If specific noise or interference should arise, try en-
gaging one or both of the filters.
See the charts for further information about the typical
response curves for these highly useful filters, which
oftentimes can significantly enhance reception.
N N N N N
O O O O O TE
It is possible to mute the audio from the
speaker(s), if desired; see page 40.
To mute the audio from the Main receiver (left
speaker), press the [ MUTE ( A )] switch. To mute
the audio from the Sub receiver (right speaker),
press the [ MUTE ( B )] switch.
FT 9000MP O
DX PERATION
E E E E E
ABLE ABLE AND ABLE AND AND AND FFECTIVE FFECTIVE FFECTIVE
ABLE AND FFECTIVE FFECTIVE
A F
UDIO ILTER
TE TE TE
TE
Audio Filter Frequency Response
M
ANUAL
R R R R R
ECEPTION ECEPTION ECEPTION
ECEPTION ECEPTION
O
PERATION
FILTER A
[LOW CUT] Switch
FILTER A
[HIGH CUT] Switch
LOW CUT
NORM The audio filter is disabled.
300 Audio below 300 Hz is attenuated at a rate of -6 dB/octave.
500 Audio below 500 Hz is attenuated at a rate of -6 dB/octave.
HIGH CUT
700 Audio above 700 Hz is attenuated at a rate of -6 dB/octave.
1k Audio above 1000 Hz is attenuated at a rate of -6 dB/octave.
2.4k Audio above 2400 Hz is attenuated at a rate of -6 dB/octave.
NORM The audio filter is disabled.
A A A A A
D D D D D VICE
It is possible to combine the speakers' audio out-
puts, so as to enhance the tonal fidelity from bass
through treble; see page 40.
Pressing the [ OUTPUT ( B )] switch (once the
"[A+B]" switch has been pressed) will combine
the audio from the two speakers, effectively dou-
bling the total speaker aperture.
FILTER B
[LOW CUT] Switch
FILTER B
[HIGH CUT] Switch
VICE VICE VICE VICE
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