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Data Generation Principles
Introduction to the System
Data Generation Principles
Once the general signal parameters have been set up, it is time to apply
patterns.
"Emulate Real Pattern and Waveform Conditions"
"Data Sequences" on page 38
"Data Blocks" on page 38
"Data Segments" on page 38
"Segment Properties" on page 39
"Loops" on page 40
"Hardware Dependencies" on page 41
Emulate Real Pattern and Waveform
Conditions
Data patterns (data segments) can be stored in the system database and
output as part of a sequence with algorithmic data such as a PRBS. Data
patterns for the signals required by the DUT can easily be set up in terms of
data segments that span across several output or input connectors of the
HP 81200 system.
Captured data or data produced by a simulation can be imported as an
ASCII text file.
The HP 81200 system can be used to stimulate communications devices
using its sequencing capability.
Packets or cells consisting of payload and control data can be produced by
creating control segments and using a PRBS segment for the payload.
Cell/packet size can be varied and control segments can be stored in the
database and used in any number of different packets. A PRBS pattern may
be used as the payload to test error rates. Intermittent data with long dead-
times between bursts can easily be produced using the pause segment.
For testing multiplexers/demultiplexers it is possible to set up PRWS data
and compare segments. Also, it is possible to run different ports at
different frequencies.
A data stream is called a sequence. The Sequence Editor defines the
structure of the data streams sent or expected by the HP 81200 system.
Sequences can only be applied to data ports.
37
HP 81200 Data Generator/Analyzer Platform User Guide, Revision 2.1
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