Programming a Frame Erasure Rate (FER) Measurement

Programming a Frame Erasure Rate (FER) Measurement

Last updated: December 2, 2008

This section is only applicable to the lab applications.

The following procedure assumes that an active link is established between the test set and the mobile station. See Establishing an Active GSM Link with the Mobile Station .

Configure FER measurement parameters using the SETup subsystem.
Set the cell power to the reference sensitivity level for the cell band you are testing.
Use the INITiate command to begin a FER measurement.
Use the FETCh? command to obtain FER measurement results.

Programming Example

 
10    OUTPUT 714;"SET:FFER:TIM 3000" !Set measurement timeout
20    OUTPUT 714;"SET:FFER:CONT OFF" !Set trigger to single
30    ! Set the cell power to the reference sensitivity level
40    OUTPUT 714;"CALL:POW -102"
50    OUTPUT 714;"INIT:FFER" !Initiate the measurement
60    OUTPUT 714;"FETC:FFER?"!Fetch the measurement results
70    ENTER 714;Integrity,Samples,Fer,Retx_count
80    END

Returned values

The measurements returned by this program are:

Integrity returns the Integrity Indicator (0 means a successful measurement with no errors).
Samples returns the number of samples counted.
Fer returns the ratio of frame erasures to total frames tested.
Retx_count returns the number of retransmitted frames.

Related Topics

GSM Frame Erasure Rate (FER) Measurement Description