Technical data

Serial Data Equalization Commands 28
Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference 731
:SPRocessing:FFEQualizer:TAP:PLENgth
Command :SPRocessing:FFEQualizer:TAP:PLENgth {CUSTom | PRBS51 | PRBS61 | PRBS71
| PRBS81 | PRBS91 | PRBS101}, <file>
In order for the tap optimization to work, the algorithm must know the
input pattern. You can train the oscilloscope to a known pattern and then
use the optimized taps on your live traffic. The :FFEQualizer:TAP:PLENgth
command sets the pattern for the FFE tap optimization algorithm.
The file parameter is only used in CUSTom mode.
For more information on this parameter, refer to the N5461A Infiniium
Seriald Data Equalization User's Guide.
<CUSTom> Allows you to import a known pattern via a .prtn file (save at location
<file>)
<PRBSX1> Pseudo- random Binary Sequence of length 2^X - 1.
Example This example sets the pattern to PRBS 2^8 - 1.
myScope.WriteString ":SPRocessing:FFEQualizer:TAP:PLENgth PRBS81"
Query :SPRocessing:FFEQualizer:TAP:PLENgth?
The :SPRocessing:FFEQualizer:TAP:PLENgth? query returns the pattern
used in optimizing the FFE tap values.