How do I make EGPRS SRB Bit Error Measurements?

A. Test Set Configuration

Setup parameters for this measurement are assumed to be set to their default (Full preset) values unless otherwise stated. This procedure also assumes that the BCH parameter for 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 Operating Mode ( F1 ) and select Active Cell (EGPRS) .
3. Press the Data Conn Type ( F2 ) key, and select SRB Loopback.
4. Select PDTCH Parameters ( F9 ) from the Call Parms menu.
5. Select Modulation Coding Scheme ( F11 ) from the PDTCH Parms menu. The Modulation Coding Scheme popup menu appears.
6. Select Uplink Modulation Coding Scheme and select any of the modulation coding schemes.
7. Press the Close Menu ( F6 ) key.

B. Start a Data Connection

1. Connect the mobile.

2. Turn the mobile on and wait for Attached in the Active Cell: field.

      

   NOTE

   For mobiles that don't perform an EGPRS attach automatically, set the mobile to data mode. For example, your mobile station may have a connectivity setting for GPRS that allows you to specify whether you are always on-line or only use GPRS when it is needed.

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3. Press the Start Data Connection ( F3 ) key and watch for the Active Cell: field changing to Transferring .

C. Start the Measurement

1. Press the Measurement selection key.
2. Select the EGPRS SRB Bit Error measurement.

   The following graphic shows an example of EGPRS SRB Bit Error results. Notice that the number of bits actually tested exceeds the number requested. This occurs because the test set rounds up the number requested to the nearest number that results in an integral number of bursts.

   

D. Setup the Measurement

1. Press the Bit Error Setup ( F1 ) key.
2. You can set the measurement parameters as needed for your measurement, for example, you may want to change the Number of bits to test . You may also want to set up a Measurement Timeout to prevent the measurement from "hanging" if the test set is unable to complete the measurement for any reason.
3. Press the Close Menu ( F6 ) key.

Related Topics

EGPRS SRB Bit Error Measurement

EGPRS SRB Bit Error Troubleshooting