How Do I Make a Change of TFC (Transport Format Combination) Measurement?

How Do I Make a Change of TFC (Transport Format Combination) Measurement?

Last updated: January 15, 2009

This section is only applicable to the lab application.

Measuring 3GPP TS 34.121 5.6 Change Of TFC

  1. Ensure that the test set has been properly calibrated (see Calibrating the Test Set ).
  2. Set the downlink and uplink channels:
    • Set Operating Mode ( F1 ) to Cell Off .
    • Set DL Channel ( F10 ) and Uplink Channel ( F11 ) to the appropriate "mid range" frequencies for your UE's operating band, as specified by 3GPP TS 34.108 5.1.1 (for example, for operating band I, DL Channel = 10700 and Uplink Channel = 9750 ).
    • Set Operating Mode to Active Cell .
  3. Ensure Uplink Dummy DCCH Data is set to its default value of Off (select RB Test Mode Setup , F6 on Call Control 3 of 5 ).
  4. Ensure Uplink DPCH Bc/Bd Control is set to its default value of Auto (select Uplink Parameters , F4 on Call Control 2 of 5 ).
  5. Ensure UL CL Power Ctrl Algorithm is set to its default value of Two (select UL CL Power Ctrl Parameters , F8 on Call Parms 3 of 3 ).
  6. Establish a 12.2k RMC RB Test Mode connection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ).
  7. Ensure that the Connected DL Channel Levels are set to their default values, as required by 3GPP TS 34.121 Table E.3.1 (select Generator Info , F3 on Call Control 2 of 5 ).
  8. Set Cell Power ( F7 ) to -93 dBm .
  9. Set UE Target Power ( F7 on Call Parms 3 of 3 ) to 0 dBm . Ensure that UL CL Power Ctrl Mode is set to its default value of Active Bits (select UL CL Power Ctrl Parameters , F8 on Call Parms 3 of 3 ). The test set then drives the UE to 0 dBm, while also appropriately ranging its measurement receiver.
  10. Set UL CL Power Ctrl Mode to Alternating bits to hold the UE's power at 0 dBm.
  11. Press the Measurement selection key.
  12. Select Change Of TFC .
  13. Select Change Of TFC Setup ( F1 ).
    • Set Step Down Size to -7 dB.
    • Set Step Up Size to 7 dB.
    • Set Step Error Limit: Upper to 2 dB.
    • Set Step Error Limit: Lower to - 2 dB.
    • Select Close Menu ( F6 ).
  14. Press the START SINGLE key to begin the measurement.
  15. Verify that the Step Down Error and Step Up Error test results are Pass.

Related Topics

Change of TFC (Transport Format Combination) Measurement Description

Change of TFC (Transport Format Combination) Troubleshooting

Programming a Change of TFC (Transport Format Combination) Measurement