Spectrum DSP M2 User Manual page 47

As the DSP "strength" setting is increased the rate of filter adaptation is slowed down. While
this can have the effect of make a filter "stronger" to a degree by making it focus more
strongly on the voice components rather than the rapidly-changing noise, if this setting is
increased too much it may change too slowly to track different voices!
While the higher settings (e.g. >= 35 or so) may (or may not) be useful for voice, they can be
useful for narrowband signals that do not exhibit fast changes, spectrally speaking – such as
CW: The effects of very "strong" DSP settings on CW signals can, under certain
circumstances, be quite striking!
With very high "strength" settings and the slow adaptation rate, one may perceive that the
filter may be "stuck", but turning the DSP filter off and then back on will "reset" it and cause it
to re-train. If you are using the the DSP NR filter at such high settings, it is worth
experimenting with turning it off and on to get a "feel" as to how the filters respond.
It should be noted that at very high DSP settings (>45) the DSP NR is more susceptible to
crashing when exposed to strong impulse noises: Refer the the section about automatic and
manual resetting of the DSP NR, below. At these high settings the DSP may "crash" by
producing a loud white noise rather than go completely silent.
Important Note:
If, when the a menu item is changed, it will be necessary to press the MENU then PWR
button to save the changes to the EEPROM.
Spectrum DSP M2 User Manual V1.1
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