User's Manual

Digital ATSC Exciter-Modulator System Chapter 2,
Installation and Operating Instructions
Axcera Axciter, Rev. 0 26
and/or the DAC. If this happens, lower the unity gain reference point for the
nonlinear equalizer.
Peak to Average Ratio
This value shows the peak to average ratio of the transmitted signal. This
value is typically 6 to 8 dB for a perfect signal. A value significantly lower will
indicate peak compression. A small amount of peak compression is normal.
DTVision Linear Home/ Spectrum Screen
8-VSB Spectrum Display
The spectrum display shows the energy of the output signal as a function of
frequency. An ideal 8VSB signal will occupy 6 MHz of bandwidth. Power
amplifier nonlinearity will cause undesired "shoulders" to appear on each side
of the spectrum.