S E T U P F O R M
C H A P T E R 4
Taps
: The number of taps determines the length of the computed filter. The longer the filter,
the better the non-coherent signals (noise) will be canceled. It also introduces latency equal to
the number of filter taps divided by the sample rate in samples per second and is in addition to
Delay (see below). The larger the number of taps, the longer it takes for the filter to converge
but upon achieving convergence, the better the filter will be.
Delay
: Determines how far back to look in the signal before beginning to compute a coherent
signal enhancement filter. With large delays, there is a higher likelihood of detrimental affects to
normal speech. Latency is also introduced that is equal to the Delay.
Gain
: Determines the adaptation rate of the filter. The larger the number, the faster the filter
will converge but the less stable it will be
.
Automatic Notch Filter
Figure 91: Automatic Notch Filter Controls
The Automatic Notch Filter (
ANF
) attempts automatic computation of a filter to remove one or more
carrier tones that are interfering with the signal of interest.
Taps
: This determines the length of the computed notch filter. The longer the filter, the larger
the number of tones that can be canceled and the more effective the cancellation will be. It also
introduces latency (signal delay) equal to the number of filter taps divided by the sample rate in
samples per second and is in addition to Delay (see below). The larger the number of taps, the
longer it takes for the filter to converge but upon achieving convergence, the better the filter
will be.
Delay
: Determines how far back to look in the signal before beginning to compute a
cancellation filter. The larger the delay, the less the impact on normal speech, and the more
likely the filter will be able to concentrate only on longer term coherent signals such as carrier
tones. Latency is introduced that is equal to the Delay.
Gain
: Determines the adaptation rate of the filter. The larger the number, the faster the filter
will converge but the l ess stable
it will be
.
Use Peak Readings for TX Meter DSP Values
When checked, the MIC, EQ, Leveler, CPDR and ALC TX Meters will show peak values instead of RMS
values.
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