Yaesu SP-2000, Operation Manual

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FILTER
LOW CUT switch
FILTER
HIGH CUT switch
High-cut (2.4kHz, 1kHz, 700Hz) and Low-cut (500Hz, 300Hz) audio filters, with front-panel filter response selection.
The optimum filter setting will depend on the operating mode and band/noise conditions. For example:
Audio Filter Operation
P
For 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 reduce high-pitched noise,
and give the audio a more mellow sound.
P
For 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.
P
For AM and FM operation
Begin operation in the “NORM” (Normal) position, cor-
responding to the widest fidelity available. If specific noise
or interference should arise, try engaging one or both of
the filters.
See the charts for typical response curves of these highly
useful filters. Often, reception and communications can
be significantly enhanced.
Audio Filter Frequency Response
LOW CUT FILTER
NORM Select this position, when not using the “LOW CUT”
filter.
1 below 300 Hz (-6dB/Oct)
2 below 500 Hz (-6dB/Oct)
HIGH CUT FILTER
3 above 700 Hz (-6dB/Oct)
2 above 1k Hz (-6dB/Oct)
1 above 2.4k Hz (-6dB/Oct)
NORM Select this position, when not using the “HIGH CUT”
filter.
ENGLISH