How Do I Make an Extended Range Dynamic Power Measurement?

How Do I Make an Extended Range Dynamic Power Measurement?

Last updated: January 15, 2009

   
NOTE
Before performing an Extended Range Dynamic Power measurement, ensure that the test set has been properly calibrated (see Calibrating the Test Set ).
   

Measuring Extended Range Dynamic Power

This procedure assumes the test set is in Active Cell Operating Mode. However, this measurement is also available in FDD Test Operating Mode.

  1. Set the test set's receiver to the proper power and frequency for your UE's power sequence:
    • Select Receiver Control ( F12 on Call Parms 3 of 3 ).
    • Set Power Control to Manual .
    • Set Manual Power to the maximum power level expected in the first power sequence. For example, 13 dBm.
    • Set Measurement Frequency to the frequency at which the UE will transmit its power sequences (for example, 1 GHz).
  2. Press the Measurement selection key, select Extended Range Dynamic Power .
  3. Select Ext Range Dyn Power Setup ( F1 ) and set the measurement parameters as needed.
    • Set First Sequence Steps to the number of the steps in the UE's first power sequence (for example, 45). The number of the steps can be 1 to 84. NOTE: The total number of First Sequence Steps and Second Sequence Steps can not exceed 85.
    • Set Second Sequence Steps to the number of the steps in the UE's second power sequence (for example, 40). The number of the steps can be 1 to 84. NOTE: The total number of First Sequence Steps and Second Sequence Steps can not exceed 85.
    • Set Second Sequence Expected Power to the maximum power level expected in the UE's second power sequence (for example, -32 dBm). The test set requires re-ranging its receiver after completing the first power sequence and before measuring the second power sequence. You must command your UE to transmit for 15 power steps (timeslots) with constant or varied power levels between the two power sequences you desire to measure, to allow test set to re-range its receiver. The test set does not make any measurement during this period.
    • Set Trigger Source to RF Rise .
    • Set RF Rise Trigger Threshold as needed. It is recommended that you set RF Rise Trigger Threshold to approximately 10 dB below the Manual Power . For example, 3 dBm.
    • Select Close Menu ( F6 ).
  4. Place your UE into a test mode. To ensure that the measurement is successfully triggered, order your UE to transmit continuously at a low power level (for example, -20 dBm) so that the first power step in the power sequences will meet the requirements of the RF rise trigger (the trigger pulse should rise in power by at least 20 dB and above the RF Rise Trigger Threshold level. See Triggering the Extended Range Dynamic Power Measurement for details).
  5. Press the START SINGLE key to initiate (arm) the measurement.
  6. Order your UE to begin transmission of the power sequences (two power sequences to be measured and 15 power steps (timeslots) in the middle of the two power sequences for test set re-ranging its receiver. The test set does not make any measurement during the receiver re-ranging period).

       
    IMPORTANT
    Do not send any GPIB commands to the test set or press any front panel keys until the measurement has completed.
       

    When the measurement completes, the power results are displayed on the test set's screen. An example result is shown below.

  7. If needed, select Axis Control ( F2 ). Set the axis parameters as needed and then select Return ( F6 ).
  8. If needed, select Marker ( F3 ) to turn on the marker on the graphical display. The power level of the step as specified by the marker is also displayed at the top of the window.

Related Topics

Extended Range Dynamic Power Measurement Description

Extended Range Dynamic Power Measurement Troubleshooting

Programming an Extended Range Dynamic Power Measurement

Receiver Control