Parts List/Tune Up Info

REV A — 25 April, 2019

Technical Service Bulletin 190425

10. Crest Factor Optimization Parameter Setting

For a given “Crest Factor”, the “Crest Factor Optimization” enhances the signal shoulders. Find-

ing the best value for this parameter allows the user to gain performance on the shoulders of the

signal, thus optimizing the amplier power.

This shoulder optimization involves a MER / SNR performance reduction. The user must nd the

best trade-o󰀨 for shoulder performance vs. MER/SNR performance.

This parameter can vary in a range from 0 (O󰀨 or None) to 255 (Max).

When the Crest Factor Optimization parameter is increased, the shoulder level becomes better.

At the same time, the MER performance decreases. As explained earlier, a trade-o󰀨 between

the two is necessary to obtain the best overall optimization and desired signal performance.

There is a “usable” range for the Crest Factor Optimization parameter between about 50 and

150. Below 50 on this setting not too much e󰀨ect is noticed. Above 150 on this setting the MER

/ SNR performance will likely be too far degraded.