Keysight Technologies J-BERT M8020A User Manual

46 Keysight M8070A Programming Guide
2 Recommended Programming Techniques
Symbol Width
To specify the symbol encoding this sequence works with, insert the
following:
<symbolWidth>1</symbolWidth>
Available symbol widths are:
1: this is for bit coded symbols
10: this is for 8b/10b coded and bit coded symbols
130: for 128/130 coded and bit coded symbols
132: for 128/132 coded and bit coded symbols
Pattern Generation Granularity
Pattern generation has granularity. A single bit cannot be generated.
Instead, multiple bits are generated at once. Compared to other BERTs like
the J-BERT N4903B, different granularities are supported to allow for less
restrictions in the pattern generation. Also, granularity is hidden as much
as possible by unrolling patterns internally.
Table 17 Pattern generation granularity
The actual pattern sequence attributes are specified within:
<sequence replicate=”Serialize”></sequence>
Replicate allows global selection of how to distribute PRBS or memory
patterns to multiple locations.
• Serialize: first bit/symbol is assigned to first location, next bit/symbol to
next location and so on. This means a pattern needs to have a minimum
block length * locations bits. In the case of a PRBS, a PRWS is issued,
setting the phases of the PRBS generators in a way that they will form a
PRBS after a MUX.
• Copy: each location gets a copy of the PRBS /pattern.
Symbol Width Granularity
1 64
10 80
130 130
132 132

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