Bird-technologies 5019D-Manual Manuel d'utilisateur télécharger pdf (Page 22)

Peak Envelope Power

Peak power measurements detect amplitude changes as a sig-

nal modulates the carrier envelope. The WPS operates in an

asynchronous cycle: 300 ms of waveform sampling followed by

a 50 ms reset period. The peak power is then displayed and the

cycle repeats. The display therefore updates about three times

per second.

Transmitter overdrive can be detected with peak measure-

ments. Common problems are overshoot at the beginning of

burst packets, amplitude modulation, and excessive tran-

sients. These damage system components with excessive peak

power and also cause data degradation, increasing the Bit

Error Rate. For TDMA applications, Peak and Burst Power

measurements are used to detect overshoot in single

timeslots. Other timeslots must be turned off for this test.

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Bird-technologies 5019D-Manual Manuel d'utilisateur Page 22