YOKOGAWA TA220 User manual

Digital Jitter Meter
IM 704610-01E
3rd Edition

Product Registration
Thank you for purchasing YOKOGAWA products.
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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

i
IM 704610-01E
Foreword
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.
Notes
•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
3rd Edition : October 2007 (YK)
All Rights Reserved, Copyright © 2004 Yokogawa Electric Corporation

ii 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.
ETHERNET
100BASE-TX
LINK ACT
GP-IB(IEEE488)
EXT ARM
IN INHIBIT
IN
(TTL) (TTL) ( 0.4V) (50 )
CLOCK
OUT
OUT
SLICED RF MONITOR
OUT EQUALIZED
OUT
(50 )
JITTER LEVEL
DC OUT DC OUT
(0 to +5V) (0 to +5V)
KEY
LOCK
100-120V/200-240V AC
100VA MAX 50/60Hz
FUSE 250V T 5A
WARNING
MODEL
SUFFIX
NO.
MODEL
SUFFIX
NO.
( 0.4V)
Model and Suffix Code
Model Suffix Specification
704610 100–120 VAC, 200-240 VAC
Equalizer -BDS Conventional equalizer for BD
(the -BDS equalizer specification will be discontinued in
December, 2004, upon release of -BD1).
-BD1 Conventional equalizer for BD, D-to-C high speed calculation,
D-to-C jitter measurement excluding 2T
Power cord -D UL/CSA standard power cord (Part No.: A1006WD)
[Maximum rated voltage: 125 V; Maximum rated current: 7 A]
-F VDE standard power cord (Part No.: A1009WD)
[Maximum rated voltage: 250 V; Maximum rated current: 10 A]
-Q BS standard power cord (Part No.: A1054WD)
[Maximum rated voltage: 250 V; Maximum rated current: 10 A]
-R AS standard power cord (Part No.: A1024WD)
[Maximum rated voltage: 240 V; Maximum rated current: 10 A]
-H GB standard power cord (Part No.: A1064WD)
[Maximum rated voltage: 250 V; Maximum rated current: 10 A]
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.

iii
IM 704610-01E
Standard Accessories
The following accessories are included in 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
FR
Q
Power cord (One of the following power cords is supplied according to the suffix codes.)
H
D
Spare fuse for
power supply
A1114EF
1 piece
User’s manual
IM704610-01E
Option function
user’s manual
IM704610-51E
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
and 1:1 switching type)
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
Checking the Contents of the Package

iv IM 704610-01E
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

v
IM 704610-01E
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.
CAUTION
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.
Safety Precautions

vi IM 704610-01E
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.

vii
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 Describes precautions that should be observed to prevent serious
injury or death to the user.
CAUTION Describes precautions that should be observed to prevent minor or
moderate injury, or damage to the instrument.
Note
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
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.
Explanation
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.

viii IM 704610-01E
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
K
L
M
N
O
P
Q
R
S
T
Lowercase c
Lowercase h
U
V
W
X
Y
Z
+
–
×
÷
^(Exponent)
Conventions Used in This Manual

ix
IM 704610-01E
Flowchart of Operation
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
Preparing the Instrument
Entering Measurement Conditions
Entering Measurement Conditions
Signal Output
Signal Output
Installing the instrument
Connecting the power supply and
turning the power switch ON and OFF
Connecting cables and a probe
• Measurement function and polarity
• Input impedance and input coupling
• Equalizer
• Trigger mode and slice level
• Gate time
• Arming
• Block sampling
• Inhibit
• Other (as needed)
• DC output of jitter ratio
• DC output of RF signal voltage level
• Other signal output
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
Section 7.1
Section 7.2
Section 7.3
Displaying Measurement Results
Displaying Measurement Results
• Meter (needle)
• Numerical values
• Determination
Section 5.1
Section 5.2
Section 5.3

xIM 704610-01E
Contents
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

xi
IM 704610-01E
1
2
3
4
5
6
7
8
9
10
11
12
13
Index
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

xii 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

1-1
IM 704610-01E
1
Names and Functions of Parts
Chapter 1 Names and Functions of Parts
1.1 Front and Rear Panels
Front Panel
Rotary knob
Use to enter or select numerical settings and other setting items.
Unit indicator
An LED illuminates to indicate the units for the measured value or setting value being displayed.
-> (sections 5.1 and 5.2)
Power switch -> (section 3.4)
Handle
Use to lift or carry the instrument. -> (section 3.1)
Meter
Needle indicates measured results. -> (sections 5.1 and 12.3)
Adjustment trimmer
Use to adjust the zero position of the needle. -> (section 12.3)
Measurement input terminal (RF input)
Terminal for connecting the RF signal measurement cable.
-> (section 3.5)
RF indicator
Illuminates when a trigger activates during measurement of RF signals.
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.
DIGITAL JITTER METER
POWER
MEDIA FUNCTION
POLARITY
ARMING INHIBIT
LOCAL RECALL ENTER
TRIG
IMPEDANCE EQUALIZER
SEC RANGE
KEY
LOCK MEASURE
DISP OFF
JUDGE
GO
NO-GO
10%
20%
S
SEC RANGE
SCALE
L.MARK R.MARK
GATE TIME DELAY BLOCK
REMOTE STORE UTILITY
JDG LEVEL LEVEL
AUTO
COUPLE EQ BOOST
RF
MAN CONV
50 Ω1M
Ω
5V RMS
PW
E2T
D to C
BD x1
ns ms s %V
%/S
Display 1 (7-segment red LED display)
Displays entered or selected numerical settings and other setting items.
Display 2 (dot matrix green LED display)
Displays entered or selected numerical settings and other setting items.
KEY LOCK indicator
Illuminates when key lock is ON. -> (section 11.4)
Determination indicator
Displays jitter ratio determination results. -> (section 5.3)
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
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)
Jitter ratio DC output terminal
Outputs the jitter ratio as a DC signal. -> (section 7.1)
Voltage level DC output terminal
Outputs the RF signals input to the measurement input terminal as DC
signals. -> (section 7.2)
Vent holes
-> (section 3.2)
Power connector -> (section 3.3)
Power fuse -> (section 12.8)
GP-IB connector -> (section 8.3)
ETHERNET
100BASE-TX
LINK ACT
GP-IB(IEEE488)
EXT ARM
IN INHIBIT
IN
(TTL) (TTL) (50 )
CLOCK
OUT
OUT
SLICED RF MONITOR
OUT EQUALIZED
OUT
(50 )
JITTER LEVEL
DC OUT DC OUT
(0 to +5V) (0 to +5V)
KEY
LOCK
100-120V/200-240V AC
100VA MAX 50/60Hz
FUSE 250V T 5A
WARNING
MODEL
SUFFIX
NO.
Do not operate without reading the
safety precautions in the user's manual.
Made in Japan
YOKOGAWA
KEY LOCK switch
Used to turn the key lock ON and OFF. -> (section 11.4)
( 0.4V) ( 0.4V)

1-2 IM 704610-01E
1.2 Keys
Measurement Condition Settings
MEDIA FUNCTION
POLARITY
ARMING INHIBIT
LOCAL RECALL ENTER
TRIG
IMPEDANCE EQUALIZER
L.MARK R.MARK
GATE TIME DELAY BLOCK
REMOTE STORE UTILITY
JDG LEVEL LEVEL
AUTO
COUPLE EQ BOOST
MAN CONV
50
Ω1M
Ω
PW
E2T
D to C
BD x1
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
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.

1-3
IM 704610-01E
1
Names and Functions of Parts
Displaying Measurement Results
INHIBIT
ENTER
EQUALIZER
BLOCK
UTILITY
EQ BOOST
CONV
MEDIA FUNC
POLARITY
LOC
TR
MEASURE
DISP OFF
JUDGE
GO
NO-GO
10%
20%
S
SEC RANGE
SCALE
L.MARK R.M
GATE
REM
JDG LEVEL LEV
AUTO
PW
E2T
D t
BD x1
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
Selects the scale of the meter.
SHIFT+SCALE (SEC RANGE) key -> section 5.1
Selects the time range for the scale when the units of time for the meter scale are set to
“s”.
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
MEDIA FUNCTION
POLARITY
ARMING INHIBIT
LOCAL RECALL ENTER
TRIG
IMPEDANCE EQUALIZER
L.MARK R.MARK
GATE TIME DELAY BLOCK
REMOTE STORE UTILITY
JDG LEVEL LEVEL
AUTO
COUPLE EQ BOOST
MAN CONV
50
Ω1M
Ω
PW
E2T
D to C
BD x1
REMOTE indicator
RECALL key -> section 6.2
Recalls setup info stored in the internal memory, and replaces with the current settings.
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.
Common Operations
MEDIA FUNCTION
POLARITY
ARMING INHIBIT
LOCAL RECALL ENTER
TRIG
IMPEDANCE EQUALIZER
L.MARK R.MARK
GATE TIME DELAY BLOCK
REMOTE STORE UTILITY
JDG LEVEL LEVEL
AUTO
COUPLE EQ BOOST
MAN CONV
50
Ω1M
Ω
PW
E2T
D to C
BD x1
< > 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.
1.2 Keys

2-1
IM 704610-01E
Explanation of Functions
2
Chapter 2 Explanation of Functions
2.1 System Configuration and Block Diagram
System Configuration
Measurement input signal
PC
• Remote control
• Data acquisition and analysis
Communication (GP-IB/Ethernet)
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 RF signal
TA220

2-2 IM 704610-01E
Block Diagram
RF input
Input circuit Measurement/computation circuit
Equalizer circuit
Time measurement
and
measurement control
AGC Equalizer
Slicer PLL
EQUALIZED
OUT
SLICED RF
OUT
CLOCK
OUT
EXT ARM
IN
INHIBIT
IN
JITTER
DC OUT
DC clamp
1 MΩ
MONITOR
OUT
50 Ω
LEVEL
DC OUT
Level
measurement
AC/DC
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 7-
segment 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.
2.1 System Configuration and Block Diagram

2-3
IM 704610-01E
Explanation of Functions
2
2.2 Measurement Principle
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 t0, and fractional pulse times Taand Tb,
pulse width T can be divided into integer multiples of the measurement clock time N
times t0and fractional pulse times Taand Tbas follows:
T = N • t0+ (Ta– Tb)
The instrument converts the fractional pulse times on the starting and ending sides (Ta
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 Taand Tbin the equation above.
T
12 t0N
TaTb
Measured signal
Measurement clock
Fractional pulse
Time-voltage conversion
T = N · t
0
+ (T
a
– T
b
)
k: Coefficient used in the A/D conversion
A/D conversion
Fractional time Fractional time
V = k · Ta
aV = k · Tb
b
A/D conversion