Teledyne QPHY-MOST150 User Manual

QPHY-MOST150o

MOST150 oPHY Serial Data

Operator’s Manual

Revision B – March, 2012
Relating to the Following Release

Versions:

•Software Option Rev. 6.8

•MOST150o Script Rev. 1.1

•Style Sheet Rev. 1.2

LeCroy Corporation
700 Chestnut Ridge Road
Chestnut Ridge, NY, 10977-6499
Tel: [phone], Fax: [phone]

Internet: www.lecroy.com
© 2009 by LeCroy Corporation. All rights reserved.

LeCroy and other product or brand names are trademarks or requested trademarks of their respective
holders. Information in this publication supersedes all earlier versions. Specifications are subject to
change without notice.

920456 Rev B

2 920456 Rev B

QPHY-MOST150o Software Option

TABLE OF CONTENTS

INTRODUCTION TO QUALIPHY MOST150 OPHY .................................................................. 5

Required Equipment .................................................................................................................................................. 5

USING QUALIPHY MOST150 OPHY ........................................................................................ 6

QUALIPHY COMPLIANCE TEST PLATFORM ......................................................................... 7

Oscilloscope Option Key Installation .......................................................................................................................... 9

Typical (Recommended) Configuration ...................................................................................................................... 9

Remote (Network) Configuration ............................................................................................................................... 9

Oscilloscope Selection ............................................................................................................................................... 9

Accessing the QPHY-MOST150o Software using QualiPHY .................................................................................. 10

Customizing QualiPHY ............................................................................................................................................. 12

Creating Custom Configurations .............................................................................................................................. 13

QPHY-MOST150o Operation ................................................................................................................................... 15

MOST150 OPHY MEASUREMENT PREPARATION .............................................................. 16

QPHY-MOST150O TEST CONFIGURATIONS ....................................................................... 16

All Tests [demo] ........................................................................................................................................................ 16

All Tests [differential and optic al probe ] .................................................................................................................... 16

All Tests [differential probe only] .............................................................................................................................. 16

All Tests [direct connections] .................................................................................................................................... 16

All Tests [optical probe only] ..................................................................................................................................... 16

QPHY-MOST150O VARIABLES ............................................................................................. 17

Default Bitrate .......................................................................................................................................................... 17

Fixed Bitrate Mode ................................................................................................................................................... 17

Pre-measured Dark Level ........................................................................................................................................ 17

Debug Mode ............................................................................................................................................................. 17

Demo Mode .............................................................................................................................................................. 17

Clock Recovery Edge ............................................................................................................................................... 17

MOST Root Function ............................................................................................................................................... 17

Absolute Eye Masks Size ......................................................................................................................................... 17

MOST Minus Signal Input ........................................................................................................................................ 17

MOST Optical Signal Input ....................................................................................................................................... 17

MOST Plus Input ...................................................................................................................................................... 17

MOST Parameter ..................................................................................................................................................... 17

Quick Mode .............................................................................................................................................................. 17

Input Row For Relevant Zi Models ........................................................................................................................... 18

Path to Demo waveforms ......................................................................................................................................... 18

QPHY-MOST150O LIMIT SETS .............................................................................................. 18

QPHY-MOST150O TEST DESCRIPTIONS ............................................................................. 18

Eye Diagram Testing 1.2, 2.4, 4.1, 4.3 ............................................................................................................. 19

Additional tests performed at SP1............................................................................................................................ 21

Check Bitrate 1.1 .............................................................................................................................................. 21

Additional tests performed at SP2............................................................................................................................ 21

Dark level and Extinction Ratio 2.1 ................................................................................................................... 21

B0/B1 Measurements 2.2 ................................................................................................................................. 22

Edge Mask Tests 2.3 ........................................................................................................................................ 23

Transition Time Tests 2.5 ................................................................................................................................. 24

920456 Rev B 3

FIGURES

Figure 1 - Report menu in QualiPHY General Setup................................................................................ 7

Figure 2 - The Test Report includes a summary table with links to the detailed test results ............. 8

Figure 3 - QualiPHY main menu and compliance test Standard selection menu ............................... 10

Figure 4 - QualiPHY configurati o n selection menu ............................................................................... 11

Figure 5 - QualiPHY test item selection menu ....................................................................................... 12

Figure 6 - V ariable Setup and Limits Manager windows ....................................................................... 14

Figure 7 - Star t Button .............................................................................................................................. 15

Figure 8 - Example of pop-up connection diagram and dialogue box ................................................ 15

Figure 9 - Location of Test Points ........................................................................................................... 18

Figure 10 - Oscilloscope Configuration after Eye Diagram Tests ........................................................ 19

Figure 11 - Eye Diagram Results ............................................................................................................. 19

Figure 12 - Oscilloscope Configuration after the Transferred Jitter Test ............................................ 20

Figure 13 - Transferred Jitter Results ..................................................................................................... 20

Figure 14 - Check Bitrate Results ............................................................................................................ 21

Figure 15 - Dark Level and Extinction Ratio Results ............................................................................. 21

Figure 16 - Oscilloscope Configuration after the B0/B1 Level Test ..................................................... 22

Figure 17 - B0/B1 Level Results ............................................................................................................... 22

Figure 18 - Oscilloscope Configuration after the Positive Edge Mask Test........................................ 23

Figure 19 - Edge Mask Results ................................................................................................................ 23

Figure 20 - Oscilloscope Configuration after the Transition Time Tests ............................................. 24

Figure 21 - Transition Time Results ........................................................................................................ 24

4 920456 Rev B

QPHY-MOST150o Software Option

INTRODUCTION TO QUALIPHY MOST150 OPHY

QPHY-MOST150o is an automated test package performing all of the normative real time oscilloscope
tests for sources in accordance with the MOST150 oPHY Automotive Ph ysical La yer Sub-Specification
Rev. 1.1, 05/2010. The software can be run on LeCroy Zi and Xi Series oscillosc o pe with at least 2
GHz bandwidth, a sample rate of at least 10GSa/s and 10Mpt of memory. The oscilloscope must also
be equipped with the QPHY-MOST150o, DFP2, and either SDM or SDA2 options.

Required Equipment

• QPHY-MOST150o, DFP2, and either SDM or SDA2 options

• Real time LeCroy Oscilloscope meeting the above requirements (at least 2 GHz bandwidth, a

sample rate of at least 10GSa/s, and 10Mpt of memory)

o All LabMaster 9 Zi-A and SDA/DDA/WaveMaster 8 Zi-A oscillosc opes
o SDA/DDA/WavePro 725Zi-A and higher bandwidth oscilloscopes
o WaveRunner 620 Zi and higher bandwidth oscilloscopes
o WaveRunner 204 MXi-A/Xi-A Series

Note: If a WaveRunner Xi oscilloscope is being used, the XWEB option is additionally

required.

• LeCroy OE425 Optical to Electrical Converter or equivalent (for optical measurements)

• LeCroy D420 Differential Probe and WL-PLINK (for electrical measurements)

Note: If non-compliance testing is being performed, a pair of matched SMA cables can be
used in place of the differential probe. This may require SMA/BNC connectors on some
oscilloscope models.

920456 Rev B 5

USING QUALIPHY MOST150 OPHY

QualiPHY MOST150 oPhy guides the user, step-by-step, through each of the tests described in the
specification: MOST150 oPHY Automotive Physical Layer Sub-Specification Rev. 1.1, 05/2010. T o do
this, the user must set up a test session.

Users choose the test configuration they wish to run. There are five pre-loaded test configurations. They
are:

• All Tests [demo]

• All Tests [differential and optical probe]

• All Tests [differential probe only]

• All Tests [direct connections]

• All Tests [optical probe only]

These pre-loaded configurations provide quick and easy ways to begin compliance testing. If the user
does not want to run any of these configurations, they can create their own custom configuration (see
the following section entitled Customizing QualiPHY for details).

The pre-loaded configurations are set up to run all of the compliance tests. If this is not what the user
wants, the variables can be modified (see the QPHY-MOST150o Variables section of this manual).

The variables are pre-loaded with the standard settings for compliance testing; however, the user may
choose to create their own configuration with the variables set as desired.

6 920456 Rev B

QPHY-MOST150o Software Option

QUALIPHY COMPLIANCE TEST PLATFORM

QualiPHY is LeCroy’s compliance test framework which leads the user through the compliance tests.
QualiPHY displays connection diagrams to ensure tests run properly, automates the oscilloscope
setup, and generates complete, detailed reports.

The QualiPHY software application automates the test and report generation.

Figure 1 - Report menu in QualiPHY General Setup

920456 Rev B 7

See the QualiPHY Operator’s Manual for more information on how to use the QualiPHY framework.

Figure 2 - The Test Report includes a summary table with links to the detailed test results

8 920456 Rev B

QPHY-MOST150o Software Option

Oscilloscope Option Key Installation

The required option keys must be purchased to enable the QPHY-MOST150o compliance tests. Call
LeCroy Customer Support to place an order and receive the codes.

Enter the key and enable the purchased option as follows:

1. From the oscilloscope menu select Utilities Utilities Setup...

2. Select the Options tab and click the Add Key button.

3. Enter the Key Code(s) using the on-screen keyboard.

4. Restart the oscilloscope to activate the options after installation.

Typical (Recommended) Configuration

QualiPHY software can be executed from the oscilloscope or a host computer. The first step is to install
QualiPHY. Please refer to the QualiPHY Operator’s Manual for installation instructions.

LeCroy recomm ends running Quali PHY on an oscillos cope equipped with Dua l Monitor Dis play capabilit y
(Option DMD-1 for oscilloscopes where this is not standard). This allows the waveform and
measurements to be sho wn on the os cilloscope LC D display whi le the Quali PHY application and
test results are displayed on a second monitor.

By default, the oscilloscope appears as a local host when QualiPHY is executed in the oscilloscope.
Follow the steps under O sc illo scope Se lect io n (as follows) and check that the IP address is 127.0.0.1.

Remote (Network) Configuration

It is also possible to install and run QualiPHY on a host computer, controlling the oscilloscope with a
Network/LAN Connection.

The oscilloscope must already be conf igured, and an IP addr ess (fixed or network -assigned)
must already be established.

Oscilloscope Selection

Set up the oscilloscope using QualiPHY over a LAN (Local Area Network) by doing the following:

1. Make sure th e host com puter is con nected t o the s ame L AN as the os cilloscope. If unsur e,
contact your system administrator.

2. From the oscilloscope menu, select Utilities  Utilities Setup...

3. Select the Remote tab.

4. Verify the oscilloscope has an IP address and the control is set to TCP/IP.

5. Run QualiPHY in the host computer and click the General Setup button.

6. Select the Connection tab.

7. Enter the IP address from step 4 (previous).

8. Click the Close button.
QualiPHY is now ready to control the oscilloscope.

QualiPHY tests the oscilloscope connection after clicking the Start button. The system prompts you if
there is a connection problem. QualiPHY’s Scope Selector function can also be used to verify the

920456 Rev B 9

connection. Please refer to the QualiPHY Operator’s Manual for explanations on how to use Scope
Selector and other QualiPHY functions.

Accessing the QPHY-MOST150o Software using QualiPHY

This topic provides a basic overview of QualiPHY’s capabilities. Please refer to the QualiPHY Operator’s
Manual for detailed information.

Access the QPHY-MOST150o software using the following steps:

1. Wait for the oscilloscope to start and have its main application running.

2. Launch QualiPHY from the Analysis menu if installed on the oscillos cope or from the desktop

3. From the QualiPHY m ain window (as follows), select Standard, the n MOST150 oPhy from the

icon if installed on a host computer.

pop-up menu (if not alre ady sel ected) . If you check the Pau se on Fai lure box (circled) Quali PHY
prompts to retry the measure whenever a test fails.

Figure 3 - QualiPHY main menu and compliance test Standard selection menu

10 920456 Rev B

QPHY-MOST150o Software Option

4. Click the Configuration button in the QualiPHY main menu:

5. Select a configuration from the pop-up menu:

Figure 4 - QualiPHY configuratio n selection menu

6. Click Start.

7. Follow the pop-up windo w pr ompts.

920456 Rev B 11

Customizing QualiPHY

The predefined configur ations in the Config uration screen cannot be m odified. However, you can create
your own test conf igurat ion s b y copying one of the standard test conf ig urati ons a nd making modifications.
A description of the test is also shown in the description field when selected.

Figure 5 - QualiPHY test item selection menu

12 920456 Rev B

QPHY-MOST150o Software Option

Creating Custom Configurations

Beginning with any of the pre-loaded configurations,

1. Click on the Test Selector tab to change what tests you would like to be included in your new
configuration.

2. Click on the Variable Setup tab to change the variables for your new configuration.

3. Click on the Limits tab to change which limit set should be used for your new configuration

• See QualiPHY Manual for more information

4. Once a change has been made to any of these sections, the Save As button becomes clickable
on the bottom of the dialog.

5. Clicking the Save As butto n will prompt you for a new configuration name and description.

Note: If a Custom Configuration was used for the procedure, the Save button will also become clickable
on the bottom of the dialog. Clicking this button will update the current configuration with new changes.

6. Once a custom configuration is defined, script variables and the test limits can be changed by
using the Variable Setup and Limits Manager from the Edit/View Configuration window.

920456 Rev B 13

Figure 6 - Variable Setup and Limits Manager windows

14 920456 Rev B

QPHY-MOST150o Software Option

QPHY-MOST150o Operation

After pressing Start in the QualiPHY menu, the softwar e instructs how to set up the test using pop-up
connection diagrams and dialog boxes.

Figure 7 - Start Button

Figure 8 - Example of pop-up connection diagram and dialogue box

920456 Rev B 15

MOST150 OPHY M EASUR EMENT PREPARATION

Before beginning any test or data acquisition, the oscilloscope must be warmed for at least 20 minutes.
Calibration is automatic under software control and no manual calibration is required.
This procedure will be run again if the temperature of the oscilloscope changes by more than a few

degrees.

QPHY-MOST150O TEST CONFIGURATIONS

Configurations also include variable settings and limit sets, not just test selections. See the QPHY­MOST150o Variables section for a description of each variable value and its respective default value.

All Tests [demo]

This configuration runs a dem onstration of all of the supported c ompliance tests. All variables are set to
default. Saved waveforms are used.

All Tests [differential and optical probe]

This configuration ass umes a differential prob e is used for the electr ical test points and a n optical probe
(O/E) for the optical test points.

All Tests [differential probe only]

This configuration assumes a differential probe is used for the all test points.

All Tests [direct connections]

This configuration assumes direct connections (SMA cables) are used for all test points.

All Tests [optical probe only]

This configuration assum es direc t c onnectio ns (S MA cables) are us ed for t he electr ical tes t poi nts and an
optical probe (O/E) for the optical test points.

16 920456 Rev B

QPHY-MOST150o Software Option

QPHY-MOST150O VARIABLES

Default Bitrate

Specifies whether the bitrate is based on 48 kHz or 44.1 kHz frames.

Fixed Bitrate Mode

Specifies whether the fixed bitrate defined above is used instead of the measured value.

Pre-measured Dark Level

The dark level value can be entered if it is already known.

Debug Mode

When active, the test will pause after each test for debugging purposes and displays the parameter
values.

Demo Mode

Specifies whether to use saved waveform data for testing or captured live signals.

Clock Recovery Edge

Specifies the clock edge use for Eye diagrams. Positive is the default and is required for compliance.

MOST Root Function

Specifies the math function to be used for the tests. Where additional function channels are required they
are allocated consecutively from the set value. A minimum of 3 function channels are required.

Absolute Eye Masks Size

Specifies whether the scaling of absolute eye diagrams is determined by the eye mask or the waveform
amplitude.

MOST Minus Signal Input

Specifies the input channel for the negative signal when using a single ended probe or direct connections
(SMA cables). Set to 'None' for compliance testing using a differential probe.

MOST O ptical Signal Input

Specifies the input channel for the O/E converter. If no O/E converter is being used set to ‘None’.

MOST Plus Input

Specifies the differential probe channel or the input channel for the positive signal when using direct
connections (SMA cables).

MOST Parameter

Specifies the first available parameter to be used for the tests. Where additional parameters are required
they are allocated consecutively from the set value. A minimum of 3 parameters are required.

Quick Mode

Specifies if existing channel settings are reused for tests in the same group where possible. This is the
default.

920456 Rev B 17

Input Row For Relevant Zi Models

Specifies whether to use the A or B inputs when a Zi model oscilloscope with multiple input rows is
detected. Row A (Top Input Row) is the default.

Path to Demo waveforms

Specifies the location of the stored waveforms for Demo Mode.

QPHY-MOST150O LIMIT SETS

The limits in use by QPHY-MOST150o are the ones specified in the MOST150 oPHY Automotive
Physical Layer Sub-Specification Rev. 1.1, 05/2010.

QPHY-MOST150O TEST DESCRIPTIONS

For additional information about the tests supported by QPHY-MOST150o please refer to the
MOST150 oPHY Automotive Physical Layer Sub-Specification Rev. 1.1, 05/2010.

Figure 9 - Location of Test Points

18 920456 Rev B

QPHY-MOST150o Software Option

Eye Diagram Tes ti ng 1 .2, 2. 4, 4 .1, 4 .3

This test is perform ed at points SP1, SP2 and SP 4 and c reates an e ye dia gram from the input signa l
and tests it against t he appropriate m ask using the specified cloc k edge. The measur ements at test
point SP2 use a normalized mask (i.e. relative to the B0/B1 measured levels) while those at the
remaining test points use an absolute mask. The result reported is the number of mask hits.

Note: In cases where a large number of m ask hits are detected the num ber of UI displa yed will be
reduced to keep the processing time manageable.

Figure 10 - Oscilloscope Configuration after Eye Diagram Tests

Shown on this screen:

• Eye diagram created from the differential input signal after the clock is recovered from the signal
using the FC Golden PLL with Cutoff Divisor of 2359 and a PLL Cutoff of 125 KHz.

Figure 11 - E ye Diagr am R esults

In the measurement section:

• P1 is the number of times the eye diagram made contact with the SP1 mask.

• P2 is the number of times the eye diagram did not make contact with the SP1 mask.

920456 Rev B 19

Transfer Jitter Testing 1.3, 2.6, 4.2

This test is perform ed at points SP1, SP2 and SP4. The os cilloscope captures a long s ignal record
which is used to generate a TIE-tr ack where the PLL from the clock recovery is set to a very low
frequency. This TIE-track is then filtere d by the specified filter. The filter is im plemented as an IIR
Butterworth filter for best conform ance to the standard. The transf er jitter value i s the RMS (sdev) of
this filtered TIE-track.

Figure 12 - Oscilloscope Configuration after the Transferred Jitter Test

Shown on this screen:

• F2 is a TIE-track of a long captured record where the PLL from the clock recovery is set to a very
low frequency. This TIE-track is then filtered by an IIR Butterworth filter.

Figure 13 - Transferred Jitter Results

In the measurement section:

• P1 is the transfer jitter value calculated by the RMS (sdev) of this filtered TIE-track.

20 920456 Rev B

QPHY-MOST150o Software Option

Additional tests performed at SP1

Check Bitrate 1.1

The actual bitrate of the signal is measured and the deviation from the nominal value is compared to
the specification.

Figure 14 - Check Bitrate Results

Additional tests performed at SP2

Dark level and Extinction Ratio 2.1

The dark level of the O/E converter is measured and used to calculate the extinction ratio. To
measure the dark level, re move the POF-fibre f rom the O/E-converter. Shade the input of the O/E­converter and pres s the “O K” butto n. Skipping the measur ement of the dark level is allo wed but will
result in a failure of the extinction ratio test.

Figure 15 - Dark Level and Extinction Ratio Results

920456 Rev B 21

B0/B1 Measurements 2.2

This test is provided for informational purposes only.

Figure 16 - Oscilloscope Configuration after the B0/B1 Level Test

Shown on the screen:

• F2 and F3 are the selected pulse widths.

Shown in the measurement section:

• P1 and P2 are the calculated the B0 and B1 levels using the conditions in the specification.

Note: The B0 and B1 measurements are used to align the Edge Masks, Eye Mask, and to calculate
the reference levels for Transition time measurements.

Figure 17 - B0/B1 Level Results

22 920456 Rev B

QPHY-MOST150o Software Option

Edge Mask Tests 2.3

The specification def ines a single mask for the positive signa l edges and individual masks for the
negative edges for each of the allowed pulse widths. The script creates these masks automatically
and saves them in the D : \M ask s f older. Any existing masks with the sam e names will be overwritten.
The signal amplitude is normalized using the m easured B0 and B1 levels and a m inimum of 1000
edges are tested.

Figure 18 - Oscilloscope Configuration after the Positive Edge Mask Test

Figure 19 - Edge Mask Results

920456 Rev B 23

Transition Time Tests 2.5

Transition times are measured relat ive to the m eas ured B0/ B1 levels a nd res caled to gi ve the res ults
in Unit Intervals. T he slowest rising edge and slowest falling edge ar e displayed and saved in the
report.

Figure 20 - Oscilloscope Configuration after the Transition Time Tests

Figure 21 - Transition Time Results

24 920456 Rev B