Digital Average Power Measurement Description
Last updated: November 27, 2008
How is a Digital Average Power Measurement Made?
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 true average power detector. The test set's digital signal processor (DSP) then determines the average power of the signal over a 10 ms measurement period (6 slots).
The measurement triggers on the test set's internal ~1.667 ms slot clock. The result is reported in dBm.
The digital average power measurement has a bandwidth of approximately 4 GHZ. For this reason, significant signal energy outside the 1.23 MHz access terminal transmit bandwidth will increase the measured value.
Digital Average Power Measurement Parameters
Digital Average Power Measurement Results
-
Integrity Indicator - (see
Integrity Indicator
).
-
Digital Average Power (in dBm).
-
The
Expected Terminal Power
(see
Expected Power
) is also displayed on the measurement screen when either of the following conditions is met:
-
Or the
Expected Terminal Total Power
(see
Expected Power
) is displayed on the measurement screen when the following condition is met:
An example measurement result display (for subtype 0 physical layer) is shown below:
Key C.S0033 Tests Performed using the Digital Average Power Measurement
Calibrating the Digital Average Power Measurement
Refer to
Calibrating the Test Set
for a description of digital average power calibration.
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