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Last updated: October 28, 2004
Digital average power measurements are broadband power measurements made directly on the RF input (the signal is not downconverted in frequency, see Block Diagram ). The input waveform is detected by a peak detector with sufficient AM bandwidth to track the instantaneous power changes of a CDMA signal. The test set's digital signal processor (DSP) then determines the average power (true rms power level) of the signal over a 10 ms (one-half of a frame) measurement period.
This measurement uses autoranging based on the open loop power control response of the mobile station to set up the receiver signal path attenuation. Triggering is handled by internal mechanisms and no external triggering is available.
This measurement can be made on signals that are power-gated or signals that are not power-gated. It is not necessary to specify whether the input signal is power-gated. If the input signal is power-gated, only the active power control groups will be measured.
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The digital average power measurement has greater than 2 GHZ bandwidth. For this reason, significant signal energy outside the IS-2000 SR1 (1.25 MHz) signal bandwidth will increase the measured value.
Expected Mobile Power
(see Expected Power ) is also displayed on the measurement screen when the test set is configured as:
Random
.The digital average power measurement meets or exceeds specifications when the following requirements are met:
Refer to Calibrating the Test Set for a description of digital average power calibration.
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Measuring Digital Average Power
Programming a Digital Average Power Measurement
Digital Average Power Troubleshooting
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