Bird Technologies 5019D-Manual - Manual (Page 22)

10
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.