Tektronix InfiniBand Reference manual
Technical Reference
InfiniBand Serial Data Compliance and Analysis
Application
Methods of Implementation (MOI)
071-2043-00
www.tektronix.com
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Table of Contents
Table of Contents
1 Introduction to RT-Eye InfiniBand Compliance Module......................1
2 Background on InfiniBand Compliance Testing....................................1
2.1 Compliance Statements and Test Definitions (TDs)...............................1
2.2 Integrator List Tests for InfiniBand........................................................4
3 InfiniBand Driver Compliance Measurements (MOIs).........................5
3.1 Required Equipment.................................................................................5
3.2 Connecting to the driver under test.........................................................5
3.2.1 SMA Connection .............................................................................6
3.2.2 ECB pad connection........................................................................7
4 Configuring a Device Under Test (DUT) for Compliance
Measurements ............................................................................................7
5 Initial Oscilloscope Setup..........................................................................8
6 Running the RT-Eye Software .................................................................9
6.1 DC Common Mode Measurement MOI................................................10
6.2 AC Common Mode Measurement MOI................................................11
6.3 Transmitter Peak-Peak Measurement MOI.........................................12
6.4 Rise/Fall Time Measurements................................................................14
6.5 Driver Jitter Measurements....................................................................15
6.6 Combining Driver Measurements..........................................................17
7 InfiniBand Cable Measurements............................................................17
7.1 Required Equipment...............................................................................17
7.2 Connecting to the Driver Under Test.....................................................18
7.3 Configuring the Device Under Test (DUT) for Compliance
Measurements.....................................................................................................18
7.4 Initial Oscilloscope Setup........................................................................18
7.5 Running the RT-Eye Software ...............................................................18
7.6 Cable Connected Minimum Differential Voltage.................................19
7.7 Combining Cable Measurements...........................................................20
8 Giving a Device an ID..............................................................................20
9 Creating a Compliance Report...............................................................20
10 Appendix A – Measurement Algorithms...............................................21
InfiniBand Compliance Measurements i
Table of Contents
ii InfiniBand Compliance Measurements
Methods of Implementation
1 Introduction to RT-Eye InfiniBand Compliance Module
This document provides the procedures for making InfiniBand compliance measurements with Tektronix
TDS/CSA7000, DSA/DPO 70000 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 statement are as follows:
C6-7: All output ports SHALL comply with the parameters and notes of the Table 16 Driver
Characteristics using appropriate parameters 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.
InfiniBand Compliance Measurements 1
Methods of Implementation
Table 1 – Chapter 6 Driver Test Definitions (TDs) from Table 16 of the Specification
CIWG-PHY
Measurement Symbol in
TD
Assertion
V2c6-
Common Mode Voltage VCM 0.5V 1.0V
007#01
V2c6-
Pk-Pk Differential Voltage Vdiff Table19
007#02
V2c6-
Disable Mode Output pk-pk Vdisable 0 85mV
007#03
V2c6-
Disable Mode Output max Vdisable 0 1.6V
007#03
V2c6-
Standby Mode Output pk-pk Vstandby 0 85mV
007#04
V2c6-
Standby Mode Output max Vstandby 0 1.6V
007#04
V2c6-
Driver Rise/Fall Time (20-80%) t
007#05
AC Common Mode Voltage V
V2c6-
Driver Total Jitter JT Table19*
007#14
Chap. 6, Table 16
100ps
DRF
25mV
ACCM
Min
Max
1
1.6V
V2c6-
Driver Deterministic l Jitter JD 0.17UI
007#14
1
Minimum Differential Pk-Pk Voltage and Jitter @ 10
specification. Test Points (compliance points) are defined based on where in the system the measurement is being made.
-12
BER is dependent on Table 19 in Chapter 6 of the InfiniBand
2 InfiniBand Compliance Measurements
Methods of Implementation
Figure 1 – Compliance Points 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.
Table 2 – Chapter 7 Cable Test Definitions (TDs) from Table 30 of the Spec ification
CIWG-PHY TD
Assertion
V2c7-002#09 Cable Connector Near End Cross Talk
V2c7-002#010 Cable Assembly Min Differential Voltage VCout 316mV
V2c07-016#01
V2c07-016#02
V2c07-016#05 Cable Connection Jitter Jca .25UI
Measurement
Cable Differential Impedance Zdca(nom)
Symbol in
Min
Max
InfiniBand Compliance Measurements 3
Methods of Implementation
2.2 Integrator List Tests for InfiniBand
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
Common Mode DC Voltage No Yes
Common Mode AC Voltage No Yes
Transmitter Peak-Peak Voltage Yes Yes
Integrator List Tests
Available in RT-Eye InfiniBand
Compliance Module
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
Cable Connection Jitter (TIE) Yes Yes
Cable Connector Minimum Differential
Voltage
Cable Connector Near End CrossTalk Yes
Cable Differential Impedance Yes
-12
BER Yes Yes
Yes Yes
Yes Yes
No (Use TDS8000 series sampling
oscilloscopes)
4 InfiniBand Compliance Measurements
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