Bird-technologies 5019D-Manual Manual de usuario descargar pdf (Pagina 24)

Crest Factor

Figure 4 Crest Factor - 10 dB CDMA Signal - 100 W

Peak - 10 W Ave

Crest factor (CF) is the ratio of the peak and average powers, in

dB. The WPS calculates the Crest Factor from the Forward Peak

and Average Power measurements.

Crest factor is becoming one of the most important measure-

ments as communication systems move into the digital age. For

CDMA and similar modulation types the CF may reach 10 dB. If

the crest factor is too large, the transmitter will not be able to

handle the peak powers and amplitude distortion will occur.

Crest factor can also detect overdrive and overshoot problems.

Knowing the CF allows end-users to more accurately set base

station power and lower operating costs.

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Bird-technologies 5019D-Manual Manual de usuario Pagina 24