User's Manual

Digital ATSC Exciter-Modulator System Chapter 2,
Installation and Operating Instructions
Axcera Axciter, Rev. 0 20
LINEAR EQUALIZER
Hold
When this option is selected, the linear equalizer is forced to use the current
values rather than calculating new values. This will continue until the Hold
option is deselected. The equalizer will not adjust to compensate for changes
while this is selected.
Zero
When Zero is selected, the linear equalizer is loaded with unity values
describing a flat response and the demodulation routine is restarted. This
option will clear itself when finished.
Enable
This option turns on the adaptive linear equalizer. The linear equalizer corrects
for frequency response and group delay characteristics in the transmitter and
the channel filter.
Disable
This option disables the adaptive linear equalizer. Group delay and frequency
response characteristics will not be removed from the transmitted signal.
Linear Successes
This value shows the number of times since Axact started that Linear Adaptive
was successful.
Linear Failures
This value shows the number of times since Axact started that Linear Adaptive
was unable to use the data available to fix the equalizer.
NONLINEAR EQUALIZER
Hold
When this option is selected, the nonlinear equalizer is forced to use the
current values rather than calculating new values. This will continue until the
Hold option is deselected. The equalizer will not adjust to compensate for
changes while this is selected.
Zero
When Zero is selected, the nonlinear equalizer is loaded with unity values with
no pre-correction and the demodulation routine is restarted. This option will
clear itself when finished.
Enable
This option enables the adaptive nonlinear equalizer. The nonlinear equalizer
corrects for nonlinear distortions, such as gain compression and incidental
phase modulation, in the transmitter's power amplifier.
Disable
This option disables the adaptive nonlinear equalizer. Any nonlinear distortion
added to the signal by the power amplifier will not be corrected.
Nonlinear Success
This value shows the number of times Nonlinear Adaptive was successful.