Keysight Technologies J-BERT M8020A User Manual

36 Keysight M8070A Programming Guide
2 Recommended Programming Techniques
Working with Patterns
Patterns can be accessed with a program and are stored in three different
areas:
1 Local to current setting (“current:”)
2 Shared between settings (“shared:”)
3 Factory supplied standard patterns (“factory:”). These patterns are read
only and cannot be modified.
Below these root nodes is a folder structure using ‘/’ as a separation
character. So a complete pattern name might be something like
“factory:SATA/LTDP-short”.
Patterns consist of a sequence of symbols. A symbol has a coding:
1 Binary (“Bit”)
2 8b10b (“B8B10”)
3 128/130 (“B128B130”)
4 128/132 (“B128B132”)
A symbol can have additional attributes to modify behavior. All symbols
support:
1 Mask: this attribute affects DataIn locations only. It specifies if the
symbol is actually compared or masked (excluded from compare).
2 Squelch: this attribute affects DataOut locations only. If this attribute is
1, a squelch (out of band) level is used.
In addition, there are coding specific attributes, to control aspects of the
coding such as bypassing or using a scrambler. Refer to
:DATA:PATTern:IDATa[?] on page 474 for more information.
The :DATA:PATTern:USE SCPI command is used to specify the patterns
and attributes. Refer to :DATA:PATTern:USE[?] on page 473 for details on
how to specify a pattern and set up its parameters. The parameters include
the pattern name, number of symbols, symbol coding (optional), mask
(optional) and squelch (optional).

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