How Do I Make a Repeated SACCH Frame Erasure Rate (FER) Measurement?

How Do I Make a Repeated SACCH Frame Erasure Rate (FER) Measurement?

Last updated: December 2, 2008

This section is only applicable to the lab applications and is not applicable to GPRS or EGPRS.

This procedure assumes that the BCH parameter for Cell Band is set up correctly for your mobile station and that the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between the mobile station and the test set.

  1. Press the CALL SETUP key.
  2. Press TCH Parameters ( F8 ).
  3. Press Traffic Channel ( F9 ) and enter a value on the low end of the ARFCN range for the band in which you are testing.
  4. Press MS TX Level ( F10 ) and enter the value for maximum power for the band in which you are testing.
  5. Press Return ( F12 ).
  6. Connect the mobile station to the test set and turn in on. Allow it to camp to the test set's signal.
  7. Establish a GSM phone call.
  8. Press BCH Parameters ( F7 ).
  9. Press Cell Power ( F7 ) and set cell power to the reference sensitivity level for the band in which you are testing. Reference sensitivity levels can be found in 3GPP TS 05.05 section 6.2.
  10. Press the Measurement Selection key.
  11. Select GSM Frame Erasure Rate . The measurement will start. If the measurement is progressing, the count in the bottom left of the measurement's screen increments.
  12. Press FER Setup ( F1 ).

       
    NOTE
    Notice that the default Samples to Test value is either 13736 (for DCS and PCS) or 6696 (for all other bands). These are the numbers specified in 3GPP TS 51.010. (For FACCH/F, refer to section 14.2.3, table 14-9. For FACCH/H, refer to section 14.2.4, table 14-10.) This measurement can take over 30 minutes to complete this number of samples.
       

  13. Modify the setup parameters as you see fit.
  14. Verify the measurement results meet the conformance requirements specified in 3GPP 51.010 (For FACCH/F, refer to section 14.2.3, table 14-9. For FACCH/H, refer to section 14.2.4, table 14-10.) The minimum samples tested is 13736 and the Frame Erasure Rate depends on which cell band the mobile station is operating.

A typical measurement report is shown above.

Related Topics

GSM Frame Erasure Rate (FER) Measurement Description