How Do I Make a Loopback Bit Error Ratio (BER) Measurement?

Measuring Loopback Bit Error Ratio

1. Press the Measurement selection key.
2. Select the Loopback Bit Error Ratio measurement.
3. Select Bit Error Setup ( F1 ).
   • Set Number of Bits to Test to 10000 .
   • Set Trigger Arm to Single .
   • Set Confidence Level to 99.80% (press the ON key).
   • Set BER Requirement to 0.10% .
   • Set Uplink DTCH RMC CRC Presence to Present and UE Loopback Type to Type 1 .

   Select Close Menu ( F6 ).

4. Establish an RB Test Mode connection between the UE and test set (see How Do I Set Up a Call and Make a Connection? ).
5. Set UE Target Power to +21 dBm (for a Power Class 4 UE).
6. Set Cell Power ( F7 ) to -106 dBm (for Operating Band I).
7. Press the START SINGLE key to begin the measurement.
8. If the Confidence Test Result is Max Bits Tested , start the measurement again. You may need to increase the Number of Bits to Test to enable a Pass or Fail result.
9. Adjust Cell Power ( F7 ), AWGN Power ( F4 ), Soft Handover ( F3 ) and Cell 2 Power ( F2 ) as desired.

An example measurement result is shown below:

Related Topics

Loopback Bit Error Ratio (BER) Measurement Description

Loopback Bit Error Ratio Troubleshooting

Programming a Loopback Bit Error Ratio Measurement