Keysight Technologies J-BERT M8020A User Manual

50 Keysight M8070A Programming Guide
2 Recommended Programming Techniques
Triggering Based on Specific Bit Sequence
The following is an example of a trigger pulse generated based on a
specific PRBS bit sequence:
<trigger>
<pulseOnPrbsMatch width="32" matchPattern="0000000"
polynomial="2^7-1" seed="127" invert="0"/>
</trigger>
All attributes can be omitted. The width defaults to 32. The match pattern
defaults to all 0’s or all 1’s depending on the invert attribute. The
polynomial defaults to the polynomial used by the generators or analyzers.
Invert also defaults to the PRBS invert setting of the generators or
analyzers.
Block Branching
Within a block a conditional branch to another block can be done. The
most simple form is as follows:
<if source="Break"</if>
This example simply jumps to the next block when a break command is
done. The following describes how to set up a break command.
1 In the M8070A software interface, select Patterns > Sequence Editor.
2Under the Block Branches settings, change Cond ition to Break.
Refer to :DATA:SEQuence:BREak on page 484 for information on setting
the break command using this SCPI command.
When a branch to a different block is desired, use the “goto” attribute:
1 In the M8070A software interface, select Patterns > Sequence Editor.
2Under the Block Branches settings, click in the Go To Block field and
enter the block name.
Other potential conditions are SysInA, SysInB, CtrlInA, or CtrlInB. Break,
SysInA and SysInB are global events and affect all locations of a sequence.
CtrlInA and CtrlInB are local to a module and are most suitable when all
locations of a sequence are using a single module.

Keysight Technologies J-BERT M8020A Specifications

General

Brand	Keysight Technologies
Model	J-BERT M8020A
Category	Control Unit
Language	English

Summary

Keysight M8000 Series of BER Test Solutions

Safety Summary

Covers general safety precautions, environment conditions, and handling instructions for instrument operation.

1 Programming Basics

Modular Configuration

Discusses the modular configuration of instruments for remote programming.

Using Identifiers

Explains the use of Location, Group Name, and Measurement Name identifiers.

2 Recommended Programming Techniques

Output Protection

Covers pattern generator output termination and protection algorithm.

Controlling the Output Levels

Explains how to set output levels using parameters like Vhigh, Vlow, Vamptl, Voffs.

Allowing the M8020A/M8030A/M8040A to Settle

Explains how instruments react to pattern changes and the time needed to settle.

Reading the M8020A/M8030A/M8040A’s Status

Working with Patterns

Creating Pattern Sequences

3 Programming Examples

Initializing the Connection

Shows how to initialize the connection to the instrument using the ResourceName.

SJ Example

PJ Example

Sampling Point Alignment Example

BER Example

M8070A Jitter Tolerance Measurement CSV Output

4 SCPI Command Language

SCPI Command Language - Introduction

Explains SCPI as the universal programming language for instrument control.

Important Points about SCPI

Covers key areas for SCPI usage: Instrument Model, Command Syntax, and Sending Commands.

Sending Commands to the M8020A/M8030A/M8040A

Details how to send commands, including an overview and using VISA.

Command Line Arguments

Communication

5 SCPI Command Reference

Subsystems

Divides SCPI commands into subsystems reflecting instrument functionality.

IEEE Commands - Reference

SCPI Standard Commands

STATus Subsystem

TRIGger Subsystem

Source Subsystem

OUTPut Subsystem

INPut Subsystem

PLUGin Subsystem

Describes the plugin interface for integrating C# assemblies.

SYSTem Subsystem

DATA Subsystem