Technical data

2
The following query returns the “Instantaneous” number of error frames,
calculated from the counts obtained in the last deci-second. This value is
available even when accumulation is turned off.
[P]FETCh[:SENSe[1]]:FECount[:ALL][:FULL]:DELTa?
3
The following query returns the ratio of the number of frame errors to the
number of frames received in the current (or last completed) accumulation
period, specified by the gate period.
[P]FETCh[:SENSe[1]]:FERatio[:ALL][:FULL][:TOTal]?
4
The following query returns the "instantaneous" frame error ratio (Actual FER)
calculated from the counts obtained in the last deci-second. This value is
available even when accumulation is turned off.
[P]FETCh[:SENSe[1]]:FERatio[:ALL][:FULL]:DELTa?
How to Evaluate Disparity Error Ratio
You can use the following commands/queries to evaluate Disparity Error results:
1
The following query returns total number of illegal disparity change count
(wrong disparity count) received in a time interval.
[P]FETCh[:SENSe[1]]:IDCCount[:ALL][:FULL][:TOTal]?
2
The following query returns the “Instantaneous” number of illegal disparity
change count, calculated from the counts obtained in the last deci-second. This
value is available even when accumulation is turned off.
[P]FETCh[:SENSe[1]]:IDCCount[:ALL][:FULL]:DELTa?
3
The following returns the ratio of the number of Illegal Disparity change count
to the number of symbols received in the current (or last completed)
accumulation period, # specified by the gate period.
[P]FETCh[:SENSe[1]]:DERatio[:ALL][:FULL][:TOTal]?
4
The following query returns the "instantaneous" disparity error ratio (Actual
DER) calculated from the counts obtained in the last deci-second. This value
is available even when accumulation is turned off.
[P]FETCh[:SENSe[1]]:DERatio[:ALL][:FULL]:DELTa?
How to Evaluate Illegal Symbol Error
You can use the following commands/queries to evaluate Illegal Symbol Error:
1
The following query returns total number of illegal symbol count received in a
time interval.
[P]FETCh[:SENSe[1]]:ISCount[:ALL][:FULL][:TOTal]?
Recommended Programming Techniques 3
Agilent J-BERT N4903B High-Performance Serial BERT 73