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Application Notes
Tx Dynamic Power Measurement Overview
The Tx dynamic power measurement allows you to measure UE output power sequences that step down in power with a fixed step size (–90 to –0.1 dB) and duration (20, 40, or 80 ms.) The UE’s output power sequence may span some or all of the measurement’s input range of –61 to +28 dBm, in up to 99 steps.
To use the measurement, you must first set Measurement Frequency to the expected UE transmitter frequency. You must also set Power Control to Manual and set Manual Power to the initial transmit power of the UE’s power sequence to properly range the test set’s receiver.
You must specify the Power Step Size, Power Step Time, and Number of Power Steps in the UE’s power sequence.
The UE must trigger the measurement with a positive change in power from 20 dB below the initial transmit power. To ensure successful triggering, it is recommended that you first order the UE to transmit continuously at the initial transmit power level, initiate the measurement, then order the UE to drop and then raise its output power by more than 20 dB to create the RF rise trigger.
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