Time Response of Open Loop Power Control Troubleshooting

Possible Setup Issues

• You must establish an RTAP (for Subtype 0 Physical Layer) or RETAP (for Subtype 2 Physical Layer) connection to perform the TROLPC measurement (see How Do I Open a Session and Test Data Connection? ).
• C.S0033 does not specify that the R-ACK Channel must be active for 4.3.2 Time Response of Open Loop Power Control. If the R-ACK Channel is active during this test, the access terminal's power may fall outside of the mask specifications. To help ensure that your access terminal does not fail this test, you should disable the R-ACK Channel by setting ACK Channel Bit Fixed Mode Attribute to off and setting AT Directed Packets to 0%.
     

  IMPORTANT

  After completing TROLPC testing, you must return ACK Channel Bit Fixed Mode Attribute to on and set AT Directed Packets to a non-zero value appropriate for your test setup.

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• Cell power must be at least 20 dB below the maximum cell power level to perform a TROLPC measurement with a +20 dB step change in cell power. Cell power must be at least 20 dB above the minimum cell power level to perform a TROLPC measurement with a -20 dB step change in cell power. The cell power range is affected by amplitude offsets (see Cell Power, AWGN (Additive White Gaussian Noise) Power and Total RF Power ).
• AWGN power must be off (see Cell Power, AWGN (Additive White Gaussian Noise) Power and Total RF Power ).
• Receiver power must be set to auto (see Receiver Control ).
• During remote operation of this measurement, you must specify the cell power step change direction using the SETup:TROPower:STEP command, and then start the measurement using either the INITiate:<measurement mnemonic>[:ON] or READ:TROPower[:ALL]? command. During manual operation, you must select either Start Meas Up ( F2 ) or Start Meas Down ( F3 ), or press the START SINGLE key to trigger each measurement. Each time you start the measurement, one 20 dB step change is performed.

Troubleshooting Techniques

• Check to see if an integrity indicator other than 0 (normal) was returned with a measurement result (see Integrity Indicator ).

Other Considerations

• To avoid over range or under range integrity indicators, correct for system path loss (see Amplitude Offset ).
• If you are manually controlling the test set's receiver, be certain that you have entered the correct frequency value for your test setup (see Receiver Control ).
• TROLPC Input Signal Requirements
• Calibrating the TROLPC Measurement

Related Topics

Time Response of Open Loop Power Control (TROLPC) Measurement Description