Measure Power Mode
123
Burst Average Power
Burst width (BW) is the duration of a pulse. Period (P)
is the time from the start of one pulse to the start of
the next pulse. Duty cycle (D) is the percentage of time
that the transmitter is on. To calculate the duty cycle
simply divide the burst width by the period (D = BW /
P). Low duty cycles mean that the burst width is much
less than the period; a large amount of dead time sur-
rounds each burst. For low duty cycles, the burst aver-
age power will be much larger than the average power.
After peak power is measured, a threshold of ½ the
peak is set. The sampled power crosses that threshold
at the beginning and end of each burst. The time
between crossings is used to calculate the duty cycle.
Burst Average Power is calculated by dividing the
Average Power by the Duty Cycle.
Crest Factor
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 measure-
ments.
Burst Average
Power
Average Power
Burst Average Power
Peak Envelope Power
0 W
100 W
50 W
Burst Width
Period
Crest Factor
10 dB CDMA
Signal
100 W Peak
10 W Ave
Average Power
Peak Envelope Power
0 W
100 W
50 W
Summary of Contents for SITE ANALYZER SA-1700EX
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