Measuring TX Dynamic Power

Last updated: October 28, 2004

General Procedure

NOTE

Channel power calibration should be performed if the test set is being used for the first time or the operating environment has changed significantly since the last calibration was performed. The channel power calibration also calibrates the TX dynamic power measurement. See Calibrating the Test Set for details.

NOTE

The measurement is expected to only be used when Call Connection status is Idle since the mobile station must be in a test mode, otherwise it may not produce meaningful results.

Connect the mobile station's antenna output to the test set's front panel RF IN/OUT connector and power it on.
Place your mobile station in the test mode required for performing TX dynamic power. The mobile station should be set to transmit initial power at its maximum transmit power at the appropriate frequency for the test.
Press the blue SHIFT key and then the green Preset key to full reset the test set.
Set test set's receiver power control to Manual mode and set the test set's Manual Receiver Power and Meas Frequency (see How Do I Change Test Set's Receiver Control Parameters? ) to the initial power level and frequency at which the mobile station will transmit. (It should be the maximum power the mobile station will transmit)
Initialize the measurement:
- Press the Measurement selection key.
- Turn the knob to highlight the TX Dynamic Power measurement and press the knob.
  
  
  
  IMPORTANT
  
  The TX dynamic power measurement does not run concurrently with any other measurements. If any measurements are running, they are closed when TX dynamic power measurement is initiated, and a message is displayed indicating that a measurement has been closed. Activating another measurement inactivates the TX dynamic power measurement.
  
  
  
  
  
  IMPORTANT
  
  If the TX dynamic power measurement is running at the time the power control transient transmission starts (see Starting the Reverse CLPC Transient ) the measurement will be closed and its operation aborted. Moreover, the TX dynamic power measurement will not be able to start (become initiated) while the transient transmission is in progress.

Set the measurement parameters as needed for your test situation.
- Press the TX Dynamic Power Setup ( F1 ) key to access the TX Dynamic Power Setup menu.
- Set the Power Step Size , Number of Power Steps , and Power Step Time to match your mobile station's test mode. See TX Dynamic Power Measurement Parameters for details.
- Press the Close Menu ( F6 ) key.
Press the START SINGLE key to arm the TX Dynamic Power measurement.
Via the mobile station test mode interface, command the mobile station to generate an RF Rise impulse to trigger the measurement. After that, the mobile station will transmit power according to its test mode defined output power profile.

IMPORTANT

Don't make any changes on the test set until the measurement is complete. Otherwise, it may cause the measurement to abort due to the missed trigger (see TX Dynamic Power Measurement Troubleshooting ).

A typical display for the TX Dynamic Power measurement result is shown below.
Set up the graph display:
- Press the Graph Control (F2 ).
- Press the Start Step ( F3 ) and Span ( F4 ) to adjust the graph view.
- Press the Marker Position ( F1 ). The power result that corresponds with the marker position is displayed above the graph and is highlighted in the table below the graphical display. The marker position also controls the table scrolling.

Measuring TX Dynamic Power

General Procedure

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