YOKOGAWA TA220 User Manual

Digital Jitter Meter

IM 704610-01E

3rd Edition

Product Registration

Thank you for purchasing YOKOGAWA products.

YOKOGAWA provides registered users with a variety of information and services. Please allow us to serve you best by completing the product registration form accessible from our homepage.

http://www.yokogawa.com/tm/

PIM 103-01E

Foreword

Notes

Thank you for purchasing the YOKOGAWA TA220 Digital Jitter Meter. This user’s manual contains useful information about the functions and operating procedures of the instrument as well as precautions that should be observed during use. To ensure proper use of the instrument, please read this manual thoroughly before beginning operation. After reading this manual, keep it in a convenient location for quick reference in the event a question arises. There are two manuals for the TA220 including this one. If the option function is installed, please read both manuals.

Manual Title Manual No. Description

TA220 Digital Jitter Meter IM 704610-01E This manual. Explains all functions and User’s Manual operating procedures of the TA220

excluding the option function.

TA220 Digital Jitter Meter IM 704610-51E Explains the operating procedures of Option Function User’s Manual the TA220 option function.

• The contents of this manual are subject to change without prior notice as a result of improvements in the instrument’s performance and functions. Display contents illustrated in this manual may differ slightly from what actually appears on your screen.

• Every effort has been made in the preparation of this manual to ensure the accuracy of its contents. However, should you have any questions or find any errors, please contact your nearest YOKOGAWA representative as listed on the back cover of this manual.

• Copying or reproduction of all or any part of the contents of this manual without the permission of Yokogawa Electric Corporation is strictly prohibited.

• The TCP/IP software or TCP/IP related documentation used for this software was developed or created using BSD Networking Software, Release 1 licensed from the Regents of the University of California at Berkeley.

Trademarks

• Adobe, Acrobat, and Acrobat Reader are either trademarks or registered trademarks of Adobe Systems in the United States and/or other countries.

• The company and product names used in this manual are not accompanied by the trademark or registered trademark symbols (™ and ®).

• Other company and product names are trademarks or registered trademarks of their respective companies.

Revisions

1st Edition: July 2004 2nd Edition: January 2005 3rd Edition: October 2007

IM 704610-01E

Checking the Contents of the Package

Unpack the box and check the contents before operating the instrument. If some items are missing or otherwise inconsistent with the contents description, please contact your dealer or nearest YOKOGAWA representative.

TA220

Check that the model name and suffix code given on the name plate on the rear panel match the ones you ordered.

CLOCK OUT

( 0.4V)

EQUALIZED

MONITOR

OUT

(50 )

JITTER LEVEL DC OUT DC OUT

(0 to +5V) (0 to +5V)

MODEL

100-120V/200-240V AC 100VA MAX 50/60Hz FUSE 250V T 5A

SUFFIX NO.

(the -BDS equalizer specification will be discontinued in December, 2004, upon release of -BD1).

D-to-C jitter measurement excluding 2T

[Maximum rated voltage: 125 V; Maximum rated current: 7 A]

[Maximum rated voltage: 250 V; Maximum rated current: 10 A]

[Maximum rated voltage: 240 V; Maximum rated current: 10 A]

[Maximum rated voltage: 250 V; Maximum rated current: 10 A]

EXT ARM

ETHERNET

100BASE-TX

ACT

LINK

GP-IB(IEEE488)

WARNING

KEY LOCK

MODEL SUFFIX NO.

SLICED RF

INHIBIT

OUT

(TTL) (TTL) ( 0.4V) (50 )

Model and Suffix Code

Model Suffix Specification

704610 100–120 VAC, 200-240 VAC Equalizer -BDS Conventional equalizer for BD

-BD1 Conventional equalizer for BD, D-to-C high speed calculation,

Power cord -D UL/CSA standard power cord (Part No.: A1006WD)

-F VDE standard power cord (Part No.: A1009WD)

-Q BS standard power cord (Part No.: A1054WD)

-R AS standard power cord (Part No.: A1024WD)

-H GB standard power cord (Part No.: A1064WD)

Option* /LEQ Limit equalizer for BD * For information on the option, see the TA220 Digital Jitter Meter Option Function User’s

Manual (IM 704610-51E). Also, the option cannot be selected for products with suffix code BDS.

NO. (Instrument Number)

When contacting the dealer from which you purchased the instrument, please give them the instrument number.

ii IM 704610-01E

Standard Accessories

The following accessories are included in the package.

Power cord (One of the following power cords is supplied according to the suffix codes.)

Checking the Contents of the Package

Part Name Model/Part Number Qty. Notes

Power cord One of the following power cords is included according to the

suffix code on the previous page.

Spare fuse for power supply A1114EF 1 250 V, 5 A, time lag

Installed in the main unit fuse

holder Rubber feet A9088ZM 2 Two rubber feet in one set User’s manual IM704610-01E 1 This manual Option function user’s manual IM704610-51E 1 Included for instruments with

the option installed

Spare fuse for power supply A1114EF 1 piece

Rubber feet A9088ZM 2 sheets

Optional Accessories (Sold Separately)

The following optional accessories are also available.

Name Model Lot Qty. Description

Power fuse A1114EF 2 250 V, 5 A, time lag 150-MHz probe 700998 1 Input resistance: 10 MΩ, length: 1.5 m (10:1

BNC cable 366924 1 BNC-BNC, length: 1m BNC cable 366925 1 BNC-BNC, length: 2 m Rack mount kit 751533-E3 1 For EIA single mount Rack mount kit 751534-E3 1 For EIA dual mount Rack mount kit 751533-J3 1 For JIS single mount Rack mount kit 751534-J3 1 For JIS dual mount

User’s manual IM704610-01E

and 1:1 switching type)

Option function user’s manual IM704610-51E

IM 704610-01E

iii

Safety Precautions

This instrument is an IEC safety class I instrument (provided with terminal for protective earth grounding). The following general safety precautions must be taken during all phases of operation, service, and repair of this instrument. If the instrument is used in a manner not specified in this manual, the protection provided by the instrument may be impaired. YOKOGAWA Electric Corporation assumes no liability for the customer’s failure to comply with these requirements.

The instrument is marked with the following symbols.

Danger. Refer to the user’s manual. This symbol appears on dangerous locations on the instrument which require special instructions for proper handling or use. The same symbol appears in the corresponding place in the manual to identify those instructions.

Alternating current

ON (power)

OFF (power)

In-position of a bistable push control

Out-position of a bistable push control

iv IM 704610-01E

Safety Precautions

Make sure to take the following precautions. Failure to take these precautions might result in injury or death of personnel.

WARNING

• Use the Correct Power Supply

Before connecting the power cord, ensure that the source voltage matches the rated supply voltage of the instrument and that it is within the maximum rated voltage of the provided power cord.

• Use the Correct Power Cord and Plug

To prevent the possibility of electric shock or fire, be sure to use the power cord supplied by YOKOGAWA. The main power plug can only be plugged into an outlet with a protective grounding terminal. Do not disable the protection feature of the instrument by using an extension cord without protective grounding.

• Connect the Protective Grounding

Make sure to connect the protective grounding to prevent electric shock before turning ON the power. The power cord included with this instrument is a 3-prong cord with a grounding wire. Connect the power cord to a 3-prong AC outlet with a protective grounding terminal.

• Do Not Impair the Protective Grounding

Never cut off the internal or external protective grounding wire or disconnect the wiring from the protective grounding terminal. Doing so creates a potential shock hazard.

• Do Not Operate with Defective Protective Grounding or Fuse

Never operate the instrument if you suspect the protective grounding or fuse might be defective. Make sure to check them before operation.

• Use the Correct Fuse

To prevent fire, make sure to use fuses of the specified rating for voltage, current, and type. Make sure to turn OFF the instrument and unplug the power cord before replacing the fuse. Never short the fuse holder.

• Do Not Operate Near Flammable Materials

Do not operate the instrument in the presence of flammable liquids or vapors. Operation of any electrical instrument in such an environment constitutes a safety hazard.

• Do Not Use When Removed from the Case

The cover should be removed by qualified personnel only. There are some areas inside the instrument with high voltages.

• Ground the Instrument before Making External Connections

Connect the protective grounding before connecting to the item under measurement or external control circuits. Also, If you need to touch the circuit with your hand, first cut the power to the circuit and confirm that it contains no voltage. To prevent the possibility of electric shock or an accident, connect the ground of the probe and input connector to the ground of the item being measured.

See below for operating environment limitations.

This product is a Class A (for industrial environments) product. Operation of this product in a residential area may cause radio interference in which case the user will be required to correct the interference.

IM 704610-01E

CAUTION

Waste Electrical and Electronic Equipment

Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC

(This directive is only valid in the EU.) This product complies with the WEEE Directive (2002/96/EC) marking requirement. This marking indicates that you must not discard this electrical/ electronic product in domestic household waste.

Product Category

With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a ÅgMonitoring and Control instrumentationÅh product.

Do not dispose in domestic household waste. When disposing products in the EU, contact your local Yokogawa Europe B. V. office.

vi IM 704610-01E

Conventions Used in This Manual

Safety Markings

The following markings are used in this manual.

Improper handling or use can lead to injury to the user or damage to the instrument. This symbol appears on the instrument to indicate that the user must refer to the user’s manual for special instructions. The same symbol appears in the corresponding place in the user’s manual to identify those instructions. In the manual, the symbol is used in conjunction with the word “WARNING” or “CAUTION.”

WARNING

CAUTION

Note

Describes precautions that should be observed to prevent serious injury or death to the user.

Describes precautions that should be observed to prevent minor or moderate injury, or damage to the instrument.

Provides important information for the proper operation of the instrument.

Headings Used for Descriptions of Operations

On pages that describe the operating procedures in Chapter 3 through 12, the following headings and symbols are used to distinguish the procedures from their explanations.

Procedure

Explanation

This subsection contains the operating procedure used to carry out the function described in the current chapter. All procedures are written with inexperienced users in mind; experienced users may not need to carry out all the steps.

This subsection provides a detailed explanation of the settings introduced in the procedure and their restrictions. A detailed description of the function is not provided. For a detailed description of the function refer to chapter 2.

Terms Used in Explanations of Procedures

Keys and Rotary Knob

Bold characters used in the Procedure sections indicate that the panel keys or rotary knob are used to execute the operation being described.

SHIFT+Panel Key

SHIFT+key means you will press the SHIFT key to turn ON the green indicator that is located above the SHIFT key and then press the panel key. The functions marked in purple above the panel keys are activated when the SHIFT key is pressed.

IM 704610-01E

vii

Conventions Used in This Manual

Digital Numbers and Characters

Since the instrument’s red-colored display is a 7-segment LED, it displays numbers, alphabetical characters, and mathematical operators in a simplified form as shown below. (Some characters are not used at all by the instrument.)

0 1 2 3 4 5 6 7 8 9

A B C D E F G H I J

Lowercase c

Lowercase h

K L M N O P Q R S T

U V W X Y Z + –

× ÷

^(Exponent)

viii IM 704610-01E

Flowchart of Operation

Preparing the Instrument

Entering Measurement Conditions

Signal Output

Displaying Measurement Results

The figure below is provided to familiarize the first-time user with the general flow of the TA220 operation. For a more detailed description of each item, see the relevant section.

Preparing the Instrument

Installing the instrument

Connecting the power supply and turning the power switch ON and OFF

Connecting cables and a probe

Entering Measurement Conditions

• Measurement function and polarity

• Input impedance and input coupling

• Equalizer

• Trigger mode and slice level

• Gate time

• Arming

• Block sampling

• Inhibit

• Other (as needed)

Section 3.2

Section 3.3, Section 3.4

Section 3.5 Section 3.6

Section 4.1 Section 4.2 Section 4.3 Section 4.4 Section 4.5 Section 4.6 Section 4.7 Section 4.8 Section 4.9

Displaying Measurement Results

• Meter (needle)

• Numerical values

• Determination

Signal Output

• DC output of jitter ratio

IM 704610-01E

• DC output of RF signal voltage level

• Other signal output

Section 5.1 Section 5.2 Section 5.3

Section 7.1 Section 7.2 Section 7.3

Foreword ......................................................................................................................................... i

Checking the Contents of the Package ...........................................................................................ii

Safety Precautions .........................................................................................................................iv

Waste Electrical and Electronic Equipment....................................................................................vi

Conventions Used in This Manual................................................................................................. vii

Flowchart of Operation ...................................................................................................................ix

Chapter 1 Names and Functions of Parts

1.1 Front and Rear Panels ..................................................................................................... 1-1

1.2 Keys ................................................................................................................................. 1-2

Chapter 2 Explanation of Functions

2.1 System Configuration and Block Diagram ....................................................................... 2-1

2.2 Measurement Principle .................................................................................................... 2-3

2.3 Measurement Functions (Measurement Items) ............................................................... 2-4

2.4 Measurement Conditions ................................................................................................. 2-7

2.5 Display ........................................................................................................................... 2-13

2.6 Signal Output ................................................................................................................. 2-14

2.7 Other Functions ............................................................................................................. 2-16

Chapter 3 Preparations for Measurement and Common Operations

3.1 Handling Precautions ....................................................................................................... 3-1

3.2 Installing the Instrument ................................................................................................... 3-3

3.3 Connecting the Power Supply.......................................................................................... 3-6

3.4 Turning the Power Switch ON and OFF........................................................................... 3-7

3.5 Connecting Cables and a Probe ...................................................................................... 3-8

3.6 Correcting the Probe Phase............................................................................................. 3-9

3.7 Entering Numerical Values............................................................................................. 3-11

Chapter 4 Measurement Condition Settings

4.1 Selecting the Measurement Function and Polarity .......................................................... 4-1

4.2 Selecting the Input Impedance and Input Coupling ......................................................... 4-3

4.3 Equalizer Settings ............................................................................................................ 4-4

4.4 Setting the Trigger Mode and Slice Level ........................................................................ 4-5

4.5 Setting the Gate Time ...................................................................................................... 4-7

4.6 Setting the Arming............................................................................................................ 4-9

4.7 Block Sampling Settings ................................................................................................ 4-11

4.8 Setting Inhibit ................................................................................................................. 4-12

4.9 Other Functions ............................................................................................................. 4-14

Chapter 5 Displaying Measured Results

5.1 Meter Display ................................................................................................................... 5-1

5.2 Turning Numerical Value Display and/or Character Display ON and OFF....................... 5-3

5.3 Displaying the Jitter Ratio Determination ......................................................................... 5-5

x IM 704610-01E

Contetns

Chapter 6 Storing and Recalling Setup Information

6.1 Storing Setup Information ................................................................................................ 6-1

6.2 Recalling Setup Information ............................................................................................. 6-2

Chapter 7 Signal Output

7.1 DC Output of Jitter Ratio .................................................................................................. 7-1

7.2 Measurement of the RF Signal Voltage Level and DC Output of the Voltage Level ........ 7-6

7.3 Outputting Other Signals................................................................................................ 7-11

Chapter 8 GP-IB Communications

8.1 About the IEEE.488.2-1992 Standard.............................................................................. 8-1

8.2 GP-IB Interface Functions and Specifications ................................................................. 8-3

8.3 Connecting the GP-IB Cable............................................................................................ 8-4

8.4 Selecting GP-IB Communications and Setting the GP-IB Address.................................. 8-5

8.5 Responses to Interface Messages................................................................................... 8-6

Chapter 9 Ethernet Communications

9.1 Ethernet Interface Functions and Specifications.............................................................. 9-1

9.2 Connecting to the Network............................................................................................... 9-2

9.3 Entering the TCP/IP and Timeout Settings, and Confirming the MAC Address ............... 9-3

Chapter 10 Communication Command

10.1 Program Format ............................................................................................................. 10-1

10.1.1 Syntactic Symbols ........................................................................................... 10-1

10.1.2 Messages ........................................................................................................ 10-1

10.1.3 Commands ...................................................................................................... 10-3

10.1.4 Response ........................................................................................................ 10-5

10.1.5 Data ................................................................................................................. 10-5

10.1.6 Synchronization with the Controller ................................................................. 10-7

10.2 Commands ..................................................................................................................... 10-9

10.2.1 Command List ................................................................................................. 10-9

10.2.2 CALCulation Group ....................................................................................... 10-12

10.2.3 COMMunicate Group .................................................................................... 10-14

10.2.4 DCOut Group ................................................................................................ 10-15

10.2.5 DISPlay Group .............................................................................................. 10-17

10.2.6 HHIStogram Group ....................................................................................... 10-19

10.2.7 INPut Group .................................................................................................. 10-20

10.2.8 LVOut Group ................................................................................................. 10-23

10.2.9 MEASure Group ............................................................................................ 10-24

10.2.10 MEMory Group .............................................................................................. 10-25

10.2.11 RECall Group ................................................................................................ 10-26

10.2.12 SAMPle Group .............................................................................................. 10-27

10.2.13 SSTart Group ................................................................................................ 10-29

10.2.14 STARt Group ................................................................................................. 10-29

10.2.15 STATus Group ............................................................................................... 10-29

10.2.16 STOP Group.................................................................................................. 10-30

10.2.17 STORe Group ............................................................................................... 10-30

10.2.18 SYSTem Group ............................................................................................. 10-31

10.2.19 UNIT Group ................................................................................................... 10-31

10.2.20 Common Command Group ........................................................................... 10-32

Index

IM 704610-01E

Contetns

10.3 Status Report ............................................................................................................... 10-34

10.3.1 Regarding the Status Report ......................................................................... 10-34

10.3.2 Status Byte .................................................................................................... 10-35

10.3.3 Standard Event Register ............................................................................... 10-36

10.3.4 Extended Event Register .............................................................................. 10-37

10.3.5 Output Queue and Error Queue .................................................................... 10-38

10.4 Sample Program .......................................................................................................... 10-39

10.4.1 Before Programming ..................................................................................... 10-39

10.4.2 Sample Program Interface ............................................................................ 10-39

10.4.3 Initialization/Error/Execution Function ........................................................... 10-40

10.4.4 Setting Measurement Parameters and Querying the Current Setting ........... 10-44

10.4.5 Querying the Measurement and Measured Result ....................................... 10-45

10.5 ASCII Character Codes ............................................................................................... 10-47

Chapter 11 Other Functions

11.1 Backed Up Setup Information ........................................................................................ 11-1

11.2 Initializing Settings ......................................................................................................... 11-2

11.3 Brightness Setting of the Numerical Value Display (Display 2-Green) ........................... 11-5

11.4 Turning the Key Lock ON and OFF................................................................................ 11-6

Chapter 12 Troubleshooting and Maintenance

12.1 Malfunction? First, Investigate. ..................................................................................... 12-1

12.2 Error Code Description and Corrective Actions ............................................................. 12-2

12.3 Adjusting the Zero Position of the Needle ...................................................................... 12-5

12.4 Self Diagnostics (Self Test) ............................................................................................ 12-6

12.5 Calibration (Changing the Factory Default Calibration Values)...................................... 12-9

12.6 Performance Test ......................................................................................................... 12-13

12.7 Version Display ............................................................................................................ 12-21

12.8 Replacing the Power Fuse ........................................................................................... 12-22

12.9 Recommended Replacement Parts ............................................................................. 12-23

Chapter 13 Specifications

13.1 Measurement Input, Trigger, Equalizer, and PLL........................................................... 13-1

13.2 Measurement Function .................................................................................................. 13-2

13.3 Gate Time, Arming, Block Sampling, and Inhibit............................................................ 13-2

13.4 Display ........................................................................................................................... 13-3

13.5 Input/Output on the Rear Panel ..................................................................................... 13-4

13.6 Communication Interface ............................................................................................... 13-5

13.7 General Specifications ................................................................................................... 13-6

13.8 Dimensional Drawings ................................................................................................... 13-8

Index

xii IM 704610-01E

Chapter 1 Names and Functions of Parts

1.1 Front and Rear Panels

Front Panel

KEY LOCK indicator

Illuminates when key lock is ON. -> (section 11.4)

Display 2 (dot matrix green LED display)

Displays entered or selected numerical settings and other setting items.

Display 1 (7-segment red LED display)

Displays entered or selected numerical settings and other setting items.

Determination indicator

Displays jitter ratio determination results. -> (section 5.3)

DIGITAL JITTER METER

KEY

LOCK

SEC RANGE

POWER

ms s

%/S

L.MARK

R.MARK

DISP OFF

MEASURE

JUDGE

NO-GO

SEC RANGE

SCALE

E2T

BD x1

D to C

DELAY BLOCK

GATE TIME

FUNCTION

MEDIA

ARMING INHIBIT

UTILITY

REMOTE

JDG LEVEL

POLARITY

STORE

RECALL

ENTER

LOCAL

LEVEL

EQ BOOST

COUPLE

EQUALIZER

IMPEDANCE

TRIG

50 Ω

MAN

AUTO

Ω

CONV

5V RMS

10%

20%

Unit indicator

An LED illuminates to indicate the units for the measured value or setting value being displayed.

-> (sections 5.1 and 5.2)

Adjustment trimmer

Use to adjust the zero position of the needle. -> (section 12.3)

Meter

Needle indicates measured results. -> (sections 5.1 and 12.3)

Power switch -> (section 3.4)

Handle

Use to lift or carry the instrument. -> (section 3.1)

Rotary knob

Use to enter or select numerical settings and other setting items.

Keys

Keys that are pressed first when entering a setting. Press a key to display the corresponding selection menu. -> (section 1.2)

SHIFT key

Pressing the SHIFT key causes the SHIFT lamp above the key to illuminate, indicating that the instrument has entered SHIFT mode. The functions marked in purple above the panel keys are activated when the SHIFT key is pressed.

Measurement input terminal (RF input)

Terminal for connecting the RF signal measurement cable.

RF indicator

Illuminates when a trigger activates during measurement of RF signals.

(section 3.5)

Names and Functions of Parts

Rear Panel

Ethernet port -> (section 9.2)

External arming signal input terminal

Accepts input of external arming signals. -> (section 4.6)

Inhibit signal input terminal

Accepts input of inhibit signals. -> (section 4.8)

Data signal output terminal

Outputs RF signals in binary. -> (section 7.3)

Clock signal output terminal

Outputs the clock signal regenerated by the PLL circuit. -> (section 7.3)

RF signal monitor output terminal

CLOCK OUT

EQUALIZED

MONITOR

OUT

(50 )

JITTER LEVEL DC OUT DC OUT

(0 to +5V) (0 to +5V)

100-120V/200-240V AC 100VA MAX 50/60Hz FUSE 250V T 5A

KEY LOCK

ETHERNET

100BASE-TX

ACT

LINK

GP-IB(IEEE488)

WARNING

Do not operate without reading the safety precautions in the user's manual.

MODEL SUFFIX NO.

Made in Japan

YOKOGAWA

EXT ARM

SLICED RF

INHIBIT

OUT

( 0.4V) ( 0.4V)

(TTL) (TTL) (50 )

Vent holes

-> (section 3.2)

GP-IB connector -> (section 8.3)

KEY LOCK switch

Used to turn the key lock ON and OFF. -> (section 11.4)

Outputs the RF signals input to the measurement input terminal as-is.

-> (section 7.3)

Equalized RF signal monitor output terminal

If the equalizer is activated, the equalized RF signal is output. -> (section 7.3)

Voltage level DC output terminal

Outputs the RF signals input to the measurement input terminal as DC signals. -> (section 7.2)

Jitter ratio DC output terminal

Outputs the jitter ratio as a DC signal. -> (section 7.1)

Power connector -> (section 3.3) Power fuse -> (section 12.8)

IM 704610-01E

1-1

1.2 Keys

Measurement Condition Settings

L.MARK

BD x1

MEDIA

JDG LEVEL

POLARITY

R.MARK

E2T

D to C

GATE TIME

FUNCTION

REMOTE

LOCAL

LEVEL

TRIG

MAN

AUTO

DELAY BLOCK

ARMING INHIBIT

STORE

RECALL

ENTER

COUPLE EQ BOOST

EQUALIZER

IMPEDANCE

Ω

CONV

SHIFT+< (L.MARK) key and SHIFT+> (R.MARK) key -> section 4.1

When using the measurement function PW, these key combinations are used to set the upper and lower limits of the pulse width to be measured.

MEDIA key -> sections 12.4

Press this key during self testing to execute the LED test.

FUNCTION key -> sections 4.1 and 12.4

Selects a measurement function. Also, you can press this key during self testing to

UTILITY

execute the keyboard test.

SHIFT+FUNCTION (GATE TIME) key -> section 4.5

Sets the gate time.

ARMING key -> sections 4.6 and 12.4

Selects either auto arming or external arming. Also, you can press this key during self testing to execute the meter test.

SHIFT+ARMING (DELAY) key -> section 4.6

Sets the arming delay when external arming is selected.

INHIBIT key -> sections 4.8 and 12.4

Sets inhibit. Also, you can press this key during self testing to execute the board test.

SHIFT+INHIBIT (BLOCK) key -> section 4.7

Sets up block sampling.

POLARITY key -> section 4.1

Selects the polarity of the signal to be measured.

TRIG key -> section 4.4

Selects the trigger mode.

SHIFT+TRIG (LEVEL) key -> section 4.4

Sets the slice level.

IMPEDANCE key -> section 4.2

Selects the input impedance of the measurement input terminal.

SHIFT+IMPEDANCE (COUPLE) key -> section 4.2

Selects the input coupling of the measurement input terminal.

EQUALIZER key -> section 4.3

Equalizes the amplitude of the RF signals input to the measurement input terminal.

SHIFT+EQUALIZER (EQ BOOST) key -> section 4.3

Sets the boost amount of the equalizer.

SHIFT+ENTER (UTILITY) key -> section 4.9

Use to enter PLL hold, D-to-C high speed calculation (not available for products with suffix code -BDS), AGC, and DC clamp settings.

1-2 IM 704610-01E

1.2 Keys

Displaying Measurement Results

L.MARK

DISP OFF

MEASURE

JUDGE

NO-GO

10%

20%

SEC RANGE

SCALE

BD x1

MEDIA

JDG LEVEL

POLARITY

GATE

FUNC

LOC

AUTO

R.M

E2T

D t

REM

LEV

CONV

MEASURE key -> sections 5.1 to 5.2

Changes the displayed measured result.

SHIFT+MEASURE (DISP OFF) key -> section 5.2

Turns OFF displays 1 and 2 (for numerical values) and the unit indicator.

SCALE key -> section 5.1

BLOCK

Selects the scale of the meter.

INHIBIT

UTILITY

SHIFT+SCALE (SEC RANGE) key -> section 5.1

ENTER

Selects the time range for the scale when the units of time for the meter scale are set to

EQ BOOST

“s”.

EQUALIZER

SHIFT+POLARITY (JDG LEVEL) key -> section 5.3

Sets the determination level when performing determination on the jitter ratio and displaying the result as GO or NO-GO.

SHIFT+ENTER (UTILITY) key -> section 5.2

Selects the measured result displayed using the MEASURE key.

Storing/Recalling Setup Information, Signal Output, Communications, and Other Functions

L.MARK

R.MARK

RECALL key -> section 6.2

Recalls setup info stored in the internal memory, and replaces with the current settings.

Names and Functions of Parts

E2T

BD x1

D to C

REMOTE

LOCAL

LEVEL

TRIG

MAN

DELAY BLOCK

ARMING INHIBIT

UTILITY

STORE

RECALL

ENTER

COUPLE EQ BOOST

EQUALIZER

IMPEDANCE

Ω

CONV

MEDIA

JDG LEVEL

POLARITY

GATE TIME

FUNCTION

AUTO

REMOTE indicator

Common Operations

L.MARK

R.MARK

E2T

BD x1

D to C

REMOTE

LOCAL

LEVEL

TRIG

MAN

DELAY BLOCK

ARMING INHIBIT

UTILITY

STORE

RECALL

ENTER

COUPLE EQ BOOST

EQUALIZER

IMPEDANCE

Ω

CONV

MEDIA

JDG LEVEL

POLARITY

GATE TIME

FUNCTION

AUTO

SHIFT+RECALL (STORE) key -> section 6.1

Stores setup information to the internal memory.

SHIFT+ENTER (UTILITY) key -> chapter 7 and sections 8.4, 9.3, 11.2, and 11.3

Use to set signal output, select the communication interface, enter a GP-IB address or TCP/IP setting, confirm the MAC address, set the timeout time, initialize settings, set the brightness, and display version information.

LOCAL key -> sections 8.2, 9.1, and 12.5

Returns the instrument from remote mode (when the REMOTE indicator above the LOCAL key is illuminated) to local mode. Also, you can press this key when in maintenance mode to execute calibration.

< > keys

Moves the selected digit when entering a value using the rotary knob and changes the setting item.

ENTER key

When changing the selection item and entering a setting for Display 1 in the Utility menu, pressing this key causes Display 1 to blink, indicating that the rotary knob and or < > keys can be used to select the setting item for editing. If you press this key again while Display 1 is blinking, it stops blinking and you can then edit the item.

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Chapter 2 Explanation of Functions

2.1 System Configuration and Block Diagram

System Configuration

Input inhibit signal Input external arming signal

DC output of jitter ratio DC output of the RF signal voltage level Monitor output of the RF signal Monitor output of the equalized RF signal Output of the data signal (binarized signal) Output of the clock signal

TA220

• Remote control

• Data acquisition and analysis

Communication (GP-IB/Ethernet)

Measurement input signal

RF signal

Explanation of Functions

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2.1 System Configuration and Block Diagram

Block Diagram

Equalizer circuit

EQUALIZED

OUT

SLICED RF

OUT

CLOCK

OUT

EXT ARM

INHIBIT

JITTER

DC OUT

LEVEL

DC OUT

MONITOR

OUT

RF input

DC clamp

50 Ω

AC/DC

AGC

1 MΩ

Equalizer

Level

measurement

Slicer

Time measurement

and

measurement control

Input circuit Measurement/computation circuit

PLL

The TA220 is a jitter measuring instrument that utilizes signal processing circuits (auto slicer, equalizer, and PLL) for support of the Blu-ray Disk standard (hereinafter, BD) of next-generation high precision optical discs. When BD-standard RF signals are input to the instrument, the PLL circuit regenerates the clock signal enabling measurement of the data to clock (D-to-C) jitter.

The RF signals input to the measurement input terminal (RF input) are routed through the input circuit at the selected input coupling and input impedance, and are passed to the measurement/computation circuit via a buffer amplifier. At the same time, signals passing through the input circuit are output from the RF signal monitoring output terminal (MONITOR OUT) on the rear panel.

The amplitude of the signals coming from the input circuit is measured by the level measurement circuit. The measured amplitude values are processed by the computation circuit and are sent to Display 1 (the 7segment red LED) for display. These amplitude values can also be converted to DC voltages between 0 and 5 V, and output from the voltage level DC output terminal (LEVEL DC OUT) on the rear panel.

The RF signals passing through the input circuit are routed to the equalizer circuit if the equalizer circuit is selected. Otherwise, they are sent directly to the measurement/computation circuit.

When the equalizer circuit is selected, the RF signals pass through the DC clamp circuit (DC clamp), AGC amplifier (AGC), and variable boost equalizer circuits (equalizer), and are converted to binary values by the autoslice (slicer) circuit. Binarized data signals are input to the PLL circuit (PLL), and the clock signal is regenerated. Data and clock signals are input to the measurement/computation circuit where the D-to-C time (phase difference) is measured and jitter values are calculated. RF signals prior to binarization that are processed in the equalizer are output from the equalized RF signal monitoring output terminal (EQUALIZED OUT) on the rear panel, or, data signals and clock signals are output from the data signal output terminal (SLICED RF OUT) and clock signal output terminal (CLOCK OUT) on the rear panel, respectively.

The DC clamp circuit function is used to stabilize input RF signals with DC components such as can occur with mirror portions of discs. This circuit temporarily adjusts the low-band cutoff frequency from 10 kHz to 3 MHz, thereby quickly attenuating the fluctuating DC component. The DC clamp circuit is active during the inhibit period.

The variable boost equalizer circuit has the equalizing characteristics shown by the transfer function below, and the characteristics of a 3rd order Bessel LPF (lowpass filter, 3 dB attenuation point 30 MHz) connected in cascade. You can set the difference in gain at 100 kHz and 16.5 MHz as the boost amount.

H(z)=1/2{–k+(1+k)z–1+(1+k)z–2–kz–3}

The autoslice circuit consists of a first order integration feedback circuit. It uses a function that superimposes DC voltage on the slice level, and you can change the slice level when the RF signal is binarized.

In the measurement/computation circuit, signal acquisition is controlled according to external arming and inhibit signals (EXT ARM and INHIBIT), time measurement and computation is performed on the acquired data, and jitter, jitter ratio, and average values are calculated. The results are shown by the meter needle and the value displayed on Display 1. In addition, the jitter ratio can also be converted to a DC voltage between 0 and 5 V, and output from the jitter ratio DC output terminal (JITTER DC OUT) on the rear panel.

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2.2 Measurement Principle

Measured signal

Measurement clock

Fractional pulse

Time-voltage conversion

Example with Pulse Width Measurement

A time shorter than the period of the measurement clock is called the fractional time. In general, since the measured signal and the measurement clock are not synchronized, fractional time exists both at the beginning and at the end of measurements. This instrument generates a “fractional pulse” which is a pulse signal equal to the sum of the fractional time and one period of the measurement clock. Given pulse width T of the measured signal, measurement clock period t

, and fractional pulse times Ta and Tb,

pulse width T can be divided into integer multiples of the measurement clock time N times t

and fractional pulse times Ta and Tb as follows:

T = N • t0 + (Ta – Tb) The instrument converts the fractional pulse times on the starting and ending sides (T

and Tb) to voltage values. By then converting those voltages to digital values using 7-bit A/D conversion, the fractional pulse widths can be measured at time resolutions of approximately 100 ps per 1LSB. T is determined by substituting the measured fractional pulse times with T

Fractional time

and Tb in the equation above.

V = k · T

Fractional time

T = N · t0 + (Ta – Tb) k: Coefficient used in the A/D conversion

V = k · T

Explanation of Functions

A/D conversion

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2.3 Measurement Functions (Measurement Items)

Pulse Width Jitter <<For procedures, see section 4.1>>

Pulse Width Measurement You can measures the pulse width from the rising edge of the slope* to the next falling edge of the slope (positive side) or from the falling edge of the slope to the next rising edge of the slope (negative side) of the data signal.

* The slope of a signal is its movement from a low level to a high level (rising), or from a high

level to a low level (falling).

Example of positive side pulses

Measurement Measurement Measurement Measurement

Data signal

Jitter σ, Jitter Ratio σ/T, and Average Value

A histogram (frequency distribution) is created from multiple pulse widths within a specified range (see “Upper and Lower Limits of the Pulse Width” on page 2-6), and the standard deviation σ of the values making up the histogram is calculated. This standard deviation σ is the pulse width jitter. The percentage calculated when dividing the standard deviation σ by the difference T in the upper and lower limits of the pulse width is called the pulse width jitter ratio. The time-averaged value of the measured pulse width signal is the pulse width average value (AVE).

• Pulse width jitter

• Pulse width jitter ratio

• Pulse width average value

AVE =

σ = Σ (Xi – AVE)2 × P

Xi × P

Σ (

i = 1

× 100(%)

)

n: Number of bins (histogram lines) of the histogram X

: Class value of each bin

: Relative frequency

(Ratio of frequency X

total number of samples)

T: Difference between the upper and lower limit of the pulse width.

of a single bin with respect to the

Note

By switching the displayed numerical value (see section 5.2) and making queries through communication commands (see section 10.2.2) you can obtain statistical values other than the jitter, jitter ratio, and average value.

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2.3 Measurement Functions (Measurement Items)

D-to-C Jitter <<For procedures, see section 4.1>>

Measuring Phase Difference You can measure the phase (time) difference from the rising (or falling) slope of the data signal to the first rising slope of the clock signal.

• Example 1 Data signal slope: rising Clock signal slope: rising

Measurement Measurement

Data signal

Clock signal

• Example 2 Data signal slope: both rising and falling Clock signal slope: rising

Measurement

Data signal

Clock signal

Measurement

Explanation of Functions

Jitter σ, Jitter Ratio σ/T, and Average Value

A histogram (frequency distribution) is determined from multiple measured values of phase difference, and the standard deviation σ from the histogram is calculated. This standard deviation σ is the D-to-C jitter. The D-to-C jitter ratio is derived as a percentage by dividing the standard deviation σ by the period T of the clock signal. The timeaveraged value of the measured phase difference signal is the D-to-C average value AVE.

• D-to-C average value

• D-to-C jitter

• D-to-C jitter ratio

AVE =

σ = Σ (Xi – AVE)2 × Pi

Xi × Pi

Σ (

i = 1

× 100(%)

)

n: Number of bins (histogram lines) of the histogram Xi: Class value of each bin Pi: Relative frequency (Ratio of frequency Xi of a single bin with respect

to the total number of samples)

T: Period of the clock signal (differs depending on the signal being measured since

it is measured at the same time as the data signal)

Regenerating the Clock Signal

The clock signal that is necessary in measuring the D-to-C jitter can be regenerated by the PLL circuit of the instrument. D-to-C jitter measurements are carried out using the regenerated clock signal. You can display the period T of the regenerated clock signal.

IM 704610-01E

Note

By switching the displayed numerical values (see section 5.2) and making queries through communication commands (see section 10.2.2), you can obtain statistical values other than the jitter, jitter ratio, and average value.

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2.3 Measurement Functions (Measurement Items)

D-to-C Jitter Excluding 2T <For the setup procedure, see section 4.1>

This is one of the functions available for measuring D-to-C jitter. D-to-C jitter is measured, excluding the phase difference of data signals having pulse widths of two times the clock signal period (2T) or less. When the pulse width of the data signal is 2T or less, the phase difference before and after that data signal is not measured. The method for determining the jitter σ, jitter ratio σ/T, and average value is the same as that for normal D-to-C jitter. D-to-C jitter excluding 2T cannot be measured by products with suffix code -BDS.

Example Slope of the data signal: Both rising and falling Slope of the clock signal: Rising

Measured

Data signal

Clock signal

Not measured

2T 3T 3T 3T 3T 4T2T

Not measured

Measured Measured

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2.4 Measurement Conditions

Measurement Block

The TA220 repeats a three-part process of measurement, data processing, and display. The smallest unit that is measured during the first part of this process is called a measurement block. In the figure below, N is the number of samples (number of data) acquired in a single pass of the process, and the measurement, data processing, and display of these samples is considered to be one block of measurement. The range of measured blocks is specified by the gate time described below.

Pulse Width Measurement

1 block

Measurement block

S1 S1 S2 S3S2 S3 SN

Measurement input signal

Preparing for measurement

Data processing

-display

1 block

Measurement block

Upper and Lower Limits of the Pulse Width <<For procedures, see section 4.1>>

Optical disc signals are pulse signals having time widths that are integer multiples of a reference item width T (for example, 2T–14T, etc.). The pulses can experience variations (jitter), such that for example a 3T pulse signal may include time widths of 2.9T or 3.1T. You can specify to measure only pulse signals within a certain range of these variations (for example a range from 2.5T to 3.5T).

Input Impedance <<For procedures, see section 4.2>>

To attenuate the measured signal and reduce distortions, you must adjust to the output impedance of the signal under test. You can select an input impedance for the measurement input terminal of 50 Ω or 1 MΩ.

Explanation of Functions

Input Coupling <<For procedures, see section 4.2>>

Measurement of only the amplitude (AC component) of the measurement input signal or only signals superimposed with a specific DC voltage is simplified by removing the DC component of the signal. There are also times when you wish to measure the input signal without removing the DC component. In these cases, you can change the input coupling setting and apply the signal to the input amp. The following types of input coupling are available.

Input is passed through a capacitor, removing the DC component. This coupling should be used when measuring only the amplitude of the signal, or when measuring only signals superimposed with a specific DC voltage.

Measurement input terminal

Inputs the signal directly. Use this setting if you wish to measure the entire input signal (DC component and AC component).

Measurement input terminal

Note

When the equalizer is ON, the signal is AC-coupled through the cutoff frequency of 10 kHz inside the equalizer regardless of the above coupling setting.

Input amp

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2.4 Measurement Conditions

Equalizing RF Signals (Equalizer) <<For procedures, see section 4.3>>

You can equalize the signal amplitude in the high frequency region. The signal amplitude in the high frequency region attenuates due to the frequency characteristics of the optical pickup. By passing the RF signal that is applied to the measurement input terminal through the equalizer, you can obtain a signal that has frequency characteristics that do not attenuate up to the high frequency region (better frequency characteristics than the optical pickup).

Frequency characteristics of the signal applied to the measurement input terminal

Amplitude

Frequency

Binarization of the RF Signal

The signal used to measure the pulse width and phase difference is a data signal binarized from the RF signal applied to the measurement input terminal. Using the slicer of the TA220, the RF signal is binarized by setting the portion of the signal that is greater than the given slice level* to the positive side and the portion that is less than the slice level to the negative side.

* The slice level changes depending on the trigger mode setting. For information on setting the

trigger mode and slice level, see “Trigger Mode and Slice Level” below.

RF signal

Data signal

Auto Slice

To correct the asymmetrical signal waveforms typical of optical disks, a slice level is automatically detected such that the time ratio of the positive and negative sides of the RF signal is 50%. The RF signal is binarized using the detected slice level. The auto slice function operates when the trigger mode is set to “auto mode” or “auto + manual mode” as described below.

Frequency characteristics of the equalizer

Amplitude

Frequency

Positive side Negative side

Slice level

Frequency characteristics of the signal after passing through the equalizer

Amplitude

Frequency

RF signal

Data signal

Positive side Negative side

Slice level

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2.4 Measurement Conditions

Trigger Mode and Slice Level <<For procedures, see section 4.4>>

When measuring the pulse width or phase difference of a single pulse, you can select the level of the data signal at which to make the measurement (activate the trigger). Slice level refers to the signal level used to binarize the RF signal.

Auto mode

The RF signal is binarized using the slice level that is detected by the auto slice function.

RF signal

Slice level that is detected by the auto slice function

Data signal

Trigger is activated (when the polarity or slope is set to )

Manual mode

The RF signal is binarized using a specified slice level.

RF signal

Center value of the amplitude

The specified slice level

Explanation of Functions

Data signal

Trigger is activated (when the polarity or slope is set to )

Center value of the amplitude

Auto + manual mode

The RF signal is binarized using the slice level detected with the auto slice function superimposed by a specified offset slice level. The offset level that is superimposed is set separately from the slice level of the manual mode described above.

Slice level that is detected by the auto slice function

RF signal

Data signal

Trigger is activated (when the polarity or slope is set to )

(Offset) level that is superimposed

Slice level for auto + manual mode

Center value of the amplitude

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2.4 Measurement Conditions

Gate Time <<For procedures, see section 4.5>>

You can set the time (gate time) during which the measured values of pulse width and phase difference are stored in the acquisition memory.

Arming <<For procedures, see section 4.6>>

Arming refers to the cue used to start the measurement. As opposed to a trigger, which refers to the cue used to measure the pulse width or phase difference of each pulse, arming refers to the starting point of the measurement of a set of pulse widths or phase differences used to derive the jitter.

Auto Arming (Internal Arming)

The internal signal of the TA220 is the arming source. Arming is the cue used to start the first measurement (the first trigger).

External Arming

Arming is activated when an external signal (arming source) is applied to the external arming input terminal. You can also select whether the rising or falling edge is used to activate the arming.

Arming Delay

When using external arming, you can delay the start of the measurement by a given amount of time (delay time) after arming occurs.

Block Sampling <<For procedures, see section 4.7>>

Repeating one block of measurement a specified number of times is called block sampling. With block sampling, all data collected after performing one block of measurement a specified number of repetitions is processed and displayed together. Block sampling measurement is available when external arming is active.

Arming delay

External arming signal

Input signal

First block

S1 S2 S3 S1 S2 S3

Start measurement

Arming delay

Second block

Start measurement

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Inhibit <<For procedures, see section 4.8>>

You can inhibit measurements by applying an external signal to the inhibit signal input terminal. This is possible even while the gate is open or during measurement after arming activation. You can also select which polarity of the signal, positive or negative, is used to inhibit measurements. The relation between the inhibit signal, gating, and arming for pulse width jitter measurement is indicated below.

Relation between the Inhibit Signal and Gating

Inhibit

2.4 Measurement Conditions

Explanation of Functions

Inhibits measurement

Gate

Data signal

Gate open

Not measured

S1 S2 S3 S4 S5

Starts measurement

Resumes measurement

Relation between the Inhibit Signal, Gating, and External Arming

Inhibits measurement

Inhibit

Gate

External arming

Data signal

Gate open

Not measured

S1 S2 S3 S4 S5

Starts measurement

Resumes measurement

Relation between the Inhibit Signal, Gating, External Arming, and Arming Delay

Inhibits measurement

Inhibit

Gate open

Gate

Arming delay

External arming

Not measured

Data signal

S1 S2 S3 S4 S5

Starts measurement

Resumes measurement

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2.4 Measurement Conditions

PLL Hold <<For procedures, see section 4.9>>

The PLL hold function maintains the frequency of the clock signal regenerated in the PLL circuit when Inhibit is active. If RF signals whose clock signals cannot be regenerated in the PLL circuit are input to the measurement input terminal when Inhibit is active, once Inhibit is cleared, if a normal RF signal whose clock signal can be regenerated in the PLL circuit is then introduced, the clock signal will be generated normally.

D-to-C High Speed Calculation <For the setup procedure, see section 4.9>

With normal D-to-C jitter measurement, when this function is enabled the measured Dto-C jitter is updated every 2 ms rather than being updated according to a specified gate time. For example, if the gate time is set to 8 ms, the measured values of the measurement clock delimited every 2 ms as in the figure below is moving-summed over an 8-ms time range, and the results are updated every 2 ms. The D-to-C high speed calculation function is not available on products with suffix code BDS.

Gate time of 8 ms Gate time of 8 ms Gate time of 8 ms

2 ms 2 ms 2 ms 2 ms 2 ms 2 ms 2 ms 2 ms 2 ms 2 ms

Outputs the moving-summed result every 2 ms. The summing time is the same as the gate time.

AGC (Automatic Gain Control Amplifier) <<For procedures, see section 4.9>>

If undulations occur in the signal amplitude envelope, the signal can be applied to an AGC circuit to normalize the fluctuations in the amplitude thereby improving the accuracy of jitter measurements.

DC Clamp <<For procedures, see section 4.9>>

If RF signals with temporarily changing DC components are applied to the measurement input terminal when Inhibit is active, the DC clamp function can be used to quickly attenuate the changed portion of the DC components. The low-band cutoff frequency in the equalizer circuit is changed from 10 kHz to 3 MHz, the changed portion of the DC component is immediately attenuated, and regeneration of the clock signal by the PLL circuit is maintained.

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2.5 Display

Meter Display <<For procedures, see section 5.1>>

The TA220 indicates the jitter and jitter ratio on the analog meter.

Jitter Ratio Indication

The jitter ratio of the selected measurement function is indicated on the analog meter. You can select a scale for the meter of 10% or 20%. The indication range is 0% to 11% for the 10% scale and 0% to 22% for the 20% scale.

Jitter Indication

The jitter of the selected measurement function is indicated on the analog meter. The scale is marked in units of time (seconds) on the bottom of the meter. You can switch the range of the scale from 0.5 ns to 5.0 µs. The range is shown on Display 2.

Display of Numerical Values and Characters

The TA220 displays numerical values and alphabetical characters such as the jitter, jitter ratio, average value, specified value, error code, and firmware version on Display 1 or Display 2.

Numerical Display of Measured Results <<For procedures, see section 5.2>>

Measured results (the jitter ratio, jitter, and average value) are displayed numerically on Display 1. Display 1 is a red 7-segment LED. Display 1 is used for settings, error codes, and the firmware version.

Explanation of Functions

Character and Numerical Display of Setting Parameters and Values

Setting parameters are shown using alphabetical characters on Display 2. Display 2 is a green dot matrix LED. For certain setting parameters, you can display the numerical measured result on Display 1 while simultaneously displaying a setting parameter and setting value on Display 2.

Turning OFF Numerical/Character Display <<For procedures, see section 5.2>>

If you are distracted by the changing jitter ratio, jitter, or average values, or blinking setting values, you can turn both Display 1 and Display 2 OFF.

Determination Display of Jitter Ratio <<For procedures, see section 5.3>>

You can set the determination level for the jitter ratio and display determination results as GO or NO-GO. The GO indicator illuminates in green when the jitter ratio is less than or equal to the determination level, and the NO-GO indicator illuminates in red when the jitter ratio exceeds the determination level. If a clock signal can not be regenerated by the PLL circuit during D-to-C measurement, both GO and NO-GO indicators illuminate in green and red respectively.

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+ 148 hidden pages

YOKOGAWA TA220 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Checking the Contents of the Package

Safety Precautions

Waste Electrical and Electronic Equipment

Conventions Used in This Manual

Flowchart of Operation

Contents

Chapter 1 Names and Functions of Parts

1.1 Front and Rear Panels

1.2 Keys

Chapter 2 Explanation of Functions

2.1 System Configuration and Block Diagram

2.2 Measurement Principle

2.3 Measurement Functions (Measurement Items)

2.4 Measurement Conditions

2.5 Display