HP CR3678 schematic

USB 2.0 Cable-Connector Assembly
Compliance Tests

Test Solution Overview Using the
Keysight E5071C ENA Option TDR

Last Update 2014/09/24

Purpose

• This slide will show how to make measurements of USB 2.0 cable &
connector assemblies compliance tests by using the Keysight
E5071C ENA Option TDR.

USB 2.0 CabCon

Compliance Test

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2

Keysight Digital Standards Program

Our solutions are driven and supported by Keysight

experts involved in international standards committees:

• Joint Electronic Devices Engineering Council (JEDEC)

• PCI Special Interest Group (PCI-SIG®)

• Video Electronics Standards Association (VESA)

• Serial ATA International Organization (SATA-IO)

• USB-Implementers Forum (USB-IF)

• Mobile Industry Processor Interface (MIPI) Alliance

• Optical Internetworking Forum (OIF)

We’re active in standards meetings, workshops, plugfests,

and seminars

Our customers test with highest confidence and achieve

compliance faster

USB 2.0 CabCon

Compliance Test

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3

USB 3.0 – Keysight Total Solution Coverage

SW

HW

Signal
Condi­tioning

Transmitter Test

N8805A USB3.0

Protocol decode &

triggering SW

DSOX90000A
Infiniium
real time scope

or

DSO91304A
Infiniium
real time scope

U7243A USB

Compliance Test

Software

Interconnect Test

E5071C ENA

Option TDR

E5071C Option TDR

ENA Network Analyzer

Receiver Test

N5990A Automatic

SW for USB

compliance

N4903B J-BERT
High-Performance
Serial BERT

with

De-emphasis
N4916A or
N4916B or
N4903B-002

Fixture

DUT

U7242A
USB 3.0
Test Fixture

Tx

Bit-USB-CBL-

0001

from BitifEye

Cable

USB Design and Test - A Better Way
(http://literature.cdn.keysight.com/litweb/pdf/5990-4640EN.pdf)

USB3ET
from USB-IF

USB 2.0 CabCon

Compliance Test

U7242A USB 3.0
Test Fixture

Tx

Tx

Rx

Rx

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4

Reference Document

• Universal Serial Bus Specification (Revision 2.0)

• Universal Serial Bus Cables and Connectors Class Document

(Revision 2.0)

USB 2.0 CabCon

Compliance Test

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5

USB 2.0 Cable/Connector Compliance Test

Cable Assembly

Host CabCon

2

USB 2.0

Half-Duplex

PWR (1), GND (1)

Three Data Rates:
Low Speed at 1.5 Mbps
Full Speed at 12 Mbps
High Speed at 480 Mbps

Device

Typical High-/Full-Speed Cable Construction

USB 2.0 CabCon

Compliance Test

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6

USB 2.0 Cable/Connector Compliance Test

Measurement Parameters

Host CabCon

2

USB 2.0

Half-Duplex

PWR (1), GND (1)

Device

Time Domain Measurements

Cable Impedance (High/Full-Speed)
Propagation Delay

Propagation Delay Skew

Frequency Domain Measurements

Signal Pair Attenuation (High/Full-Speed)

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Solution Overview

• USB 2.0 cable/connector compliance testing requires parametric measurements
in both time and frequency domains

Traditional

Frequency Domain

•Signal Pair Attenuation

Time Domain

•Cable Impedance

•Propagation Delay

•Propagation Delay Skew

Solution

Vector

Network

Analyzer

(VNA)

TDR

Scope

New Solution

•ALL parameters can

be measured with

ENA Option TDR

One-box

Solution !!

USB 2.0 CabCon

Compliance Test

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ENA Option TDR Compliance Test Solution

Certified Test Centers using ENA Option TDR

Test Centers Support ENA Option TDR

ENA Option TDR is used world wide by certified test centers of USB, HDMI,

DisplayPort, MHL, Thunderbolt and SATA.

USB 2.0 CabCon

Compliance Test

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9

USB 2.0 Cable/Connector Compliance Test

Configuration

•ENA Mainframe

•E5071C-440: 4-port, 9 kHz to 4.5 GHz

•E5071C-445: 4-port, 100 kHz to 4.5 GHz

•E5071C-460: 4-port, 9 kHz to 6.5 GHz

•E5071C-465: 4-port, 100 kHz to 6.5 GH

•E5071C-480: 4-port, 9kHz to 8.5GHz

•E5071C-485: 4-port, 100kHz to 8.5GHz

•E5071C-4D5: 4-port, 300kHz to 14GHz

•E5071C-4K5: 4-port, 300kHz 20GHz

(*1)

•Enhanced Time Domain Analysis Option
(E5071C-TDR)

•ECal Module (or Mechanical Cal Kit)

•N4431B for E5071C-44x/46x/48x

•N4433A for E5071C-4D5/4K5

*1: Signal pair attenuation test requires the test frequency from 64 kHz.
When using E5071C-4x5, the lower frequency is limited to either 100 kHz
or 300 kHz depending on the frequency option.

•Method of Implementation (MOI) document
available for download on Keysight.com

•State files (44x, 46x, 48x, 4D5, 4K5) and cal kit
definition file for official cal fixtures are also

available

www.keysight.com/find/ena-tdr_compliance
www.keysight.com/find/ena-tdr_usb2-cabcon

Cable Test Fixtures

Fixtures for testing USB

2.0/3.0 cable assemblies
are available for purchase
through Allion and BitifEye.

http://www.usb.org/developers
/tools/#cablefixtures

MOI

(Method of Implementation)

Step-by-step procedure on
how to measure the specified

parameters in the specification

document using ENA Option
TDR.

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Measurement Parameters by ENA Option TDR

Time Domain Frequency Domain

Cable

Impedance

(Tdd11, Tdd22)

Propagation

Delay

(Tdd21)

Cable

Impedance

(Tcc11, Tcc22)

Signal Pair

Attenuation

(Sdd21)

Propagation

Delay Skew

(T31, T42)

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Cable Impedance for High/Full-Speed

•Insure the signal conductors have the proper
impedance

•Measure the minimum and maximum impedances

found between the connector and the open circuited

far end of the cable

•Z0 = 90 ohm ± 15% (differential)

•ZCM = 30 ohm ± 30% (common-mode)

Host CabCon

PWR (1), GND (1)

2

Tdd11

USB 2.0 Pair

Half-Duplex

Tcc11

TDR with 200 ps (10-90%) rise time

Device

Tdd22

Tcc22

110

100

90

80

70

103.5 ohm

90 ohm ± 15%

76.5 ohm

Time (s)

Differential Impedance (ohm)

Impedance limits

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Propagation Delay

•Verify the end-to-end propagation of the cable

•For a standard USB detachable cable, the cable delay

is measured from the Series A connector pins to the

Series B connector pins

•For other cables, the delay is measured from the
Series A connector to the point where the cable is
connected to the device

Host CabCon

2

USB 2.0 Pair

Half-Duplex

PWR (1), GND (1)

Delay

TDR with 200 ps (10-90%) rise time

Device

•T

•T

FSCBL

LSCBL

< 26 ns (Full/High-Speed)

< 18 ns (Low-Speed)

•Cable delay < 5.2 ns/m

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Propagation Delay Skew

•Insure that the signal on both D+ and D- lines arrive at
the receiver at the same time

•The maximum skew introduced by the cable between

Host CabCon

2

USB 2.0 Pair

Half-Duplex

Skew = Delay(1) – Delay(2)

TDR with 200 ps (10-90%) rise time

PWR (1), GND (1)

Device

the differential signal pair (i.e. D+ and D- (T
be less than 100 ps

SKEW

)) must

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test

Signal Pair Attenuation High/Full-Speed

•Insure that adequate signal strength is presented to
the receiver to maintain a low error rate

•Must not exceed the loss figure and graph shown

below

Host CabCon

2

USB 2.0 Pair

Half-Duplex

PWR (1), GND (1)

Sdd21

Device

Maximum allowable cable loss

USB 2.0 CabCon

Compliance Test

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ENA Option TDR Compliance Test Solution

Certified MOIs available at www.keysight.com/find/ena-tdr_compliance

Cable/Connector/Interconnect

Time

&

Frequency

Time

&

Frequency

10GBASE-KR/
40GBASE-KR4

Time

&

Frequency

Frequency

100BASE-TX

Time

&

Frequency

Time

&

Frequency

Time

&

Frequency

10GBASE-T

Time

&

Frequency

Time

Transmitter/Receiver Impedance (Hot TDR/RL)

Time

&

Frequency

*

Time

&

Frequency

Time

Time

&

Frequency

Time

&

Frequency

10GBASE-KR/
40GBASE-KR4

Frequency

BroadR-Reach

Time

&

Frequency

*

* For more detail about Thunderbolt and BroadR-Reach compliance test
solution using the ENA Option TDR, contact Keysight sales representative.

More Standards
Currently Under

Investigation

USB 2.0 CabCon

Compliance Test

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USB 2.0 Cable/Connector Compliance Test Solution

Summary

ENA Option TDR Cable/Connector Compliance Testing Solution is ….

•One-box solution which provides complete characterization of high speed digital

interconnects (time domain, frequency domain, eye diagram)

•Similar look-and-feel to traditional TDR scopes, providing simple and intuitive

operation even for users unfamiliar to VNAs and S-parameters

•Adopted by test labs worldwide

USB 2.0 CabCon

Compliance Test

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Questions?

USB 2.0 CabCon

Compliance Test

Page 18

Keysight VNA Solutions

E5061B

NA + ZA in one-box

FieldFox

Handheld RF

Analyzer
5 Hz to 4/6 GHz

5 Hz to 3 GHz

Low cost RF VNA

100 k to 1.5/3.0 GHz

E5072A

Best performance
ENA

30 kHz to 4.5, 8.5

E5071C

World’s most popular
economy VNA

9 kHz to 4.5, 8.5 GHz
300 kHz to 20.0 GHz

GHz

ENA Series

PNA-X, NVNA

Industry-leading performance
10 M to 13.5/26.5/43.5/50/67 GHz
Banded mm-wave to 2 THz

PNA

Performance VNA
10 M to 20, 40, 50, 67, 110 GHz
Banded mm-wave to 2 THz

PNA-L

World’s most capable value VNA
300 kHz to 6, 13.5, 20 GHz
10 MHz to 40, 50 GHz

Mm-wave
solutions

Up to 2 THz

PNA-X

receiver

8530A replacement

PNA Series

USB 2.0 CabCon

Compliance Test

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What is ENA Option TDR?

The ENA Option TDR is an application software embedded on the
ENA, which provides an one-box solution for high speed serial
interconnect analysis.

Frequency Domain Time Domain

Eye Diagram

3 Breakthroughs

for Signal Integrity Design and Verification

Simple and Intuitive Operation

Fast and Accurate Measurements

ESD Robustness

ESD protection inside

USB 2.0 CabCon

Compliance Test

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What is ENA Option TDR?

[Video]

Keysight ENA Option TDR

Changing the world of Time Domain Reflectometry (TDR) Measurements

•www.youtube.com/watch?v=hwQNlyyJ5hI&list=UUAJAjd97CfnCehC4jZAfkxQ&index=20&feature=plcp

•www.keysight.com/find/ena-tdr

USB 2.0 CabCon

Compliance Test

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Additional Resources

•ENA Option TDR Reference Material

www.keysight.com/find/ena-tdr

•Technical Overview (5990-5237EN)

•Application Notes

•Correlation between TDR oscilloscope and VNA generated time domain waveform (5990-5238EN)

•Comparison of Measurement Performance between Vector Network Analyzer and TDR

Oscilloscope (5990-5446EN)

•Effective Hot TDR Measurements of Active Devices Using ENA Option TDR (5990-9676EN)

•Measurement Uncertainty of VNA Based TDR/TDT Measurement (5990-8406EN)

•Accuracy Verification of Keysight’s ENA Option TDR Time Domain Measurement using a NIST

Traceable Standard (5990-5728EN)

•Method of Implementation (MOI) for High Speed Digital Standards

www.keysight.com/find/ena-tdr_compliance

USB 2.0 CabCon

Compliance Test

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