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
.
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Configure FER measurement parameters using the SETup subsystem.
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Set the cell power to the reference sensitivity level for the cell band you are testing.
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Use the INITiate command to begin a FER measurement.
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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.
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Fer
returns the ratio of frame erasures to total frames tested.
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Retx_count
returns the number of retransmitted frames.
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