Technical data

184 Chapter 13
GSM/EDGE Programming Commands
GMSK Phase and Frequency (PFER)
GSM/EDGE Programming Commands
PFER results
Index Result Parameter
0 Overall PFER pass/fail result. It combines all the pass/fail values from the
results below and OR’s them together. If any fail, this result is 0.0 = pass, 1.0 =
fail.
1 RMS Phase Error pass/fail result (0.0 = pass, 1.0 = fail)
2 Peak Phase Error pass/fail result (0.0 = pass, 1.0 = fail)
3 Frequency Error pass/fail result (0.0 = pass, 1.0 = fail)
4 Average RMS Phase Error is a floating point number (in degrees) of the RMS
phase error between the measured phase and the ideal phase over the entire
burst. The calculation is based on symbol decision points and points halfway
between symbol decision points (that is, 2 points/symbol). If part of an average
group, the RMS values are averaged.
5 Maximum RMS Phase Error is a floating point number (in degrees) of the RMS
phase error between the measured phase and the ideal phase over the entire
burst. The calculation is based on symbol decision points and points halfway
between symbol decision points (i.e. 2 points/symbol). If part of an average
group, then it takes the highest RMS value.
6 Average Peak Phase Error is a floating point number (in degrees) of the peak
phase error of all the individual symbol decision points (prior to the RMS
averaging process). If part of an average group, the RMS values are averaged.
7 Maximum Peak Phase Error is a floating point number (in degrees) of the peak
phase error of all the individual symbol decision points (prior to the RMS
averaging process). If part of an average group, then it takes the highest.
8 Peak Phase Error Symbol Position is a floating point number (in symbols)
representing the symbol number at which the peak phase error occurred. If part
of an average group, then it takes the result of the last burst.
9 Maximum Peak Phase Error Symbol Position is a floating point number (in
symbols) representing the symbol number at which the peak phase error
occurred.
10 Average Frequency Error is a floating point number (in Hz) of the frequency
error over the entire measurement area. This is the difference between the
measured phase trajectory and the reference phase trajectory.
11 Maximum Frequency Error is a floating point number (in Hz) of the frequency
error over the measurement area. This measurement takes the peak frequency
error from each burst and identifies the highest value.