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8960 W-CDMA/HSPA Online User's Guide
E1963A, E6703E
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Out-of-Synch Handling of Output Power Troubleshooting

Last updated: January 16, 2009

This section is only applicable to the lab application.

Possible Setup Issues

  • The Out-of-Synch Handling of Output Power measurement does not return any measurement results at this time. Initiating the measurement only causes the test set to change its DPCCH_Ec/Ior as specified by the Out-of-Synch Handling of Output Power Measurement Parameters . You must use an external spectrum analyzer to measure the UE's resulting output power. When the Out-of-Synch Handling of Output Power measurement is initiated from the test set, the test set generates a trigger at point A that you can route to the test set's rear panel TRIG OUT connector using the Trigger Output Setup setting, to trigger the spectrum analyzer. See How Do I Make an Out-of-Synch Handling of Output Power Measurement? .
  • Before performing the out-of-synch measurement, you must:
    • Connect the test set's rear panel TRIG OUT port to the rear panel TRIGGER IN port of an external spectrum analyzer (the external spectrum analyzer is required to measure the UE's output power and obtain measurement results, see Out-of-Synch Handling of Output Power Measurement Results ).
    • Connect the UE to the test set's RF IN/OUT port and to the spectrum analyzer's RF INPUT port via an RF splitter, and specify the loss due to the RF splitter in both the test set and the spectrum analyzer.
    • Set Trigger Output Setup to Measurement Generated .
    • Establish a Radio Bearer Test Mode connection (3GPP TS 34.121 5.4.4 specifies a 12.2k RMC connection). This measurement is not supported on HSDPA or HSPA connections.
  • The following settings are recommended based on the 3GPP TS 34.121 5.4.4 requirements. Note that some of these parameters must be set before establishing a connection.
    • Set Connected DL Channel Levels as specified by 3GPP TS 34.121 Table E.3.3 and Table 5.4.4.3:
      • Cell 1 Connected CPICH Level = -10.00 dB .
      • Cell 1 Connected P-CCPCH/SCH Level = -12.00 dB .
      • Cell 1 Connected S-CCPCH Level = Off .
      • Cell 1 Connected PICH Level = -15.00 dB .
      • Cell 1 Connected DPCH Level = -16.60 dB . (This sets DPCCH_Ec/Ior before point A to -16.6 dB, because PO1 = PO2 = PO3 = 0, which makes DPCH_Ec/Ior = DPCCH_Ec/Ior).

      See Downlink Channel Levels .

    • Set (T313 + N313*10 ms) > (Ta-b + 200 ms + Tc-d + Td-e + N315*10 ms) to ensure that the UE will not drop the call when the measurement in initiated (see UE Timer and Constant Parameters and Out-of-Synch Handling of Output Power Measurement Parameters ). The UE may drop the call if the UE timers specify a drop time that is less than the time that the test set's DPCCH_Ec/Ior value is low, plus the time required for the UE to receive N315 "in sync" indicators. 3GPP TS 34.121 Table 5.4.4.2A specifies a value of 15 s for T313 and a value of 200 for N313.
    • Leave the Out-of-Synch Handling of Output Power Measurement Parameters set to their default values, (which correspond to 3GPP TS 34.121 section 5.4.4.2, 5.4.4.4.2 and Table 5.4.4.3):
      • Segment Ta-b Interval = 5.000 s
      • Segment Tc-d Interval = 5.000 s
      • Segment Td-e Interval = 5.000 s
      • DPCCH Quality Ratio Qa-b = -21.60
      • DPCCH Quality Ratio Qb-d = -28.40
      • DPCCH Quality Ratio Qd-e = -24.40
      • DPCCH Quality Ratio Qe+ = -17.60
    • Set UE Target Power to the maximum output power for your UE and set UL CL Power Control Mode to All Up bits .
    • Set Cell Power ( F7 on the Call Parms 1 of 3 menu) to -61 dBm .
    • Select Generator Info ( F3 on the Call Control 2 of 5 menu) and set AWGN Power ( F5 ) to -60 dBm.
  • During front panel operation of this measurement, you must press the START SINGLE key to initiate the measurement.

Other Considerations

  • The out-of-synch handling of output power measurement can be performed while in FDD Test Operating Mode , however you must configure the UE such that its output power will respond appropriately to the changes in the test set's DPCCH_Ec/Ior.

  • No other measurements can be running when an out-of-synch handling of output power measurement is performed. If any measurements are running when an out-of-synch handling of output power measurement is initiated, they are closed and a message is displayed to indicate that they were closed. Likewise, if any other measurements are initiated while an out-of-synch handling of output power measurement is running, the out-of-synch handling of output power measurement is closed and a message is displayed.
  • If the measurement is aborted, the UE could be left in an off state if the pre-measurement value of Cell 1 Connected DPCH Level is less than Qin.
  • The measurement will timeout unless Measurement Timeout > Segment Ta-b Interval + 200 ms + Segment Tc-d Interval + Segment Td-e Interval + 200 ms.
  • This measurement does not provide valid results while on a faded channel (see Digital Bus Information ).

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