Online Help
InfiniBand Serial Data Compliance and Analysis
Application
PHP022310
Adapted for the RT--Eye Online Help,Version 1.0.0 (August, 2003)
www.tektronix.com
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InfiniBand Serial Data Compliance and Analysis Online Help, OLH0223, Version 1.0.0
InfiniBand® Measurement Guide
Methods Of Implementation (MOI)
Using Tektronix Real Time
™
Oscilloscopes and RT-Eye
IBA
Compliance Module
Electrical Physical Layer Testing for InfiniBand
Architecture Specification Version 1.1
Since the specification is under development, you may
need to access the www.tektronix.com/serial_data web
site to down load a newer version of this document.
I
Methods of Implementation
Table of Contents
1. Introduction to RT-Eye InfiniBand Compliance Module 2
2. Background on InfiniBand Compliance Testing 2
2.1.
Compliance Statements and Test Definitions (TDs)...........................................................2
2.2. Integrator List Tests for InfiniBand....................................................................................4
3. InfiniBand Driver Compliance Measurements (MOIs) 5
Required Equipment...........................................................................................................5
3.1.
3.2. Connecting to the driver under test.................................................................................5
3.2.1. SMA Connection.......................................................................................................6
3.2.2. ECB pad connection..................................................................................................7
3.3. Configuring a Device Under Test (DUT) for Compliance Measurements...................7
3.4. Initial Oscilloscope Setup.................................................................................................8
3.5. Running the RT-Eye Software............................................................................................8
3.6. DC Common Mode Measurement MOI.............................................................................9
3.7. AC Common Mode Measurement MOI...........................................................................10
3.8. Transmitter Peak-Peak Measurement MOI.......................................................................11
3.9. Rise/Fall Time Measurements..........................................................................................14
3.10. Driver Jitter Measurem ents.............................................................................................15
3.11. Combining Driver Measurements...................................................................................17
4. InfiniBand Cable Measurements 17
Required equipment........................................................................................................17
4.1.
4.2. Connecting to the driver under test.................................................................................18
4.3. Configuring the Device Under Test (DUT) for compliance measurements....................18
4.4. Initial Oscilloscope Setup................................................................................................18
4.5. Running the RT-Eye Software........................................................................................19
4.6. Cable Connected Minimum Differential Voltage...........................................................19
4.7. Combining Cable Measurements ....................................................................................20
5. Giving a Device an ID 21
6. Creating a Compliance Report 21
Appendix A – Measurement Algorithms 21
InfiniBand Compliance Measurements 1
Methods of Implementation
1. Introduction to RT-Eye Infi niBand Compliance Module
This document provides the procedures for making InfiniBand compliance measurements with
Tektronix TDS/CSA7000 and TDS6000 series real time oscilloscopes (4 GHz models and above). The
InfiniBand Compliance Module (Opt. IBA) is an optional software plug-in to the RT-Eye Serial Data
Compliance and Analysis application (Opt. RTE). The InfiniBand Compliance module provides
Amplitude, Timing, and Jitter measurements described in the electrical specification sections of the
InfiniBand Architecture Specification.
The IBTA-CIWG (InfiniBand Trade Association - Compliance and Interoperability Working Group)
has defined a suite of electrical measurements that InfiniBand devices must pass to qualify for the
InfiniBand Integrators List (IL). Manufacturers periodically perform these measurements on their
InfiniBand devices at InfiniBand plugfests. The RT-Eye InfiniBand Compliance Module automates and
provides Pass/Fail limit testing on many of these required IL measurements, as well as additional
measurements that appear in the electrical specification.
In the subsequent sections, step-by-step procedures are described to help you perform these
measurements on your InfiniBand devices. Measurements that are required to qualify for the IL are
noted as such and appear in the IBTA CIWG Subgroup Method of Implementation (MOI) document
available for download to IBTA members at www.infinibandta.com
.
2. Background on InfiniBand Compliance Testing
2.1. Compliance Statements and Test Definitions (TDs)
Compliance statements appear in the InfiniBand architecture specification.
Chapter 6 - driver characteristics compliance stateme n t are as follows:
C6-7: All output ports SHALL comply with the parameters and notes of the Table 16 Driver
Characteristics using appropria te par ameters as noted.
From compliance statements, the CIWG-PHY (Compliance and Interoperability Working Group –
Physical Layer Subgroup) has developed Test Definitions (TDs) for measurements in Table 16. Test
Definition assertions that have been given the following designations.
Table 1 – Chapter 6 Driver Test Definitions (TDs) from Table 16 of the Specification
CIWG-PHY TD
Assertion
V2c6-007#01 Common Mode Voltage VCM 0.5V 1.0V
V2c6-007#02 Pk-Pk Differential Voltage Vdiff Table191 1.6V
Measurement Symbol in
Chap. 6, Table 16
Min
Max
1
Minimum Differential Pk-Pk Voltage and Jitter @ 10
-12
BER is dependent on Table 19 in Chapter 6 of
the InfiniBand specification. Test Points (compliance points) are defined based on where in the system
the measurement is being made.
2 InfiniBand Compliance Measurements
Methods of Implementation
V2c6-007#03 Disable Mode Output pk-pk Vdisable 0 85mV
V2c6-007#03 Disable Mode Output max Vdisable 0 1.6V
V2c6-007#04 Standby Mode Output pk-pk Vstandby 0 85mV
V2c6-007#04 Standby Mode Output max Vstandby 0 1.6V
V2c6-007#05 Driver Rise/Fall Time (20-80%) t
AC Common Mode Voltage V
V2c6-007#14 Driver Total Jitter JT Table19*
V2c6-007#14 Driver Deterministic l Jitter JD 0.17UI
100ps
DRF
25mV
ACCM
Figure 1 – Compliance P o in ts from InfiniBand Specification.
Chapter 7 Cable characteristics compliance statement is as follows:
C7-16: Cable assemblies to be used for InfiniBand shall meet the electrical requirements listed in
Table 30 for all link widths for port type 1.
InfiniBand Compliance Measurements 3
Methods of Implementation
Table 2 – Chapter 7 Cable Test Definitions (TDs) from Table 30 of the Specification
CIWG-PHY TD
Assertion
V2c7-002#09 Cable Connector Near End Cross Talk
V2c7-002#010 Cable Assembly Min Differential Voltage VCout 316mV
Measurement
Symbol in
Min
Max
V2c07-016#01
V2c07-016#02
V2c07-016#05 Cable Connection Jitter Jca .25UI
Cable Differential Impedance Zdca(nom)
2.2. Integrator List Tests for In finiBand
Table 3 shows the measurements that are available in the RT-Eye InfiniBand Compliance Module and
how they map to electrical measurements in Chapter 6 and Chapter 7 of the InfiniBand Architecture
Specification. Also shown is whether or not the measurement is an Integrator List (IL) test. IL tests are
required to have your device certified as InfiniBand compliant. Other measurements are useful, but not
required.
Table 3 – RT-Eye Measurements Mapped to Chapter 6 and Chapter 7 Measurements
Measurement
Electrical Driver Measurements (Chapter 6 of IBA Specification)
Waveform Eye Height Yes Yes
Waveform Eye Width No Yes
Integrator List Tests
Available in RT-Eye InfiniBand
Compliance Module
Common Mode DC Voltage No Yes
Common Mode AC Voltage No Yes
Transmitter Peak-Peak Voltage Yes Yes
Transmitter Transition Time
(20-80 Rise/FallTime)
Driver Total Jitter @ e
Electrical Cable Measurements (Chapter 7 of IBA Specification)
Cable Connected Eye Height No Yes
Cable Connected Eye Width No Yes
-12
BER Yes Yes
Yes Yes
4 InfiniBand Compliance Measurements
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