YOKOGAWA TA720 User manual

Time Interval Analyzer
IM 704510-01E
1st Edition

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PIM 103-01E

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IM 704510-01E
Disk No. HF16
1st Edition : September 2002 (YK)
All Rights Reserved, Copyright © 2002 Yokogawa Electric Corporation
Thank you for purchasing the YOKOGAWA TA720 Time Interval Analyzer.
This User’s Manual contains useful information about the precautions, functions, and
operating procedure of the instrument. To ensure correct use, please read this manual
thoroughly before beginning operation.
After reading the manual, keep it in a convenient location for quick reference whenever a
question arises during operation.
The following manual is also provided in addition to this manual. Read them along with
this manual.
Manual Title Manual No. Description
TA720 Communication Interface IM 704510-17E Describes the communication functions
User’s Manual of the communication interface.
Notes
•The contents of this manual are subject to change without prior notice as a result of
continuing improvements to the instrument’s performance and functions. The figures
given in this manual may differ from the actual 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 dealer as listed on the back cover of this manual.
•Copying or reproducing all or any part of the contents of this manual without the
permission of Yokogawa Electric Corporation is strictly prohibited.
•The TCP/IP software of this product and the document concerning the TCP/IP
software have been developed/created by YOKOGAWA based on the BSD
Networking Software, Release 1 that has been licensed from California University.
Trademarks
•Microsoft, MS-DOS, and Windows are either registered trademarks or trademarks of
Microsoft Corporation in the United States and/or other countries.
•Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated.
•For purposes of this manual, the TM and symbols do not accompany their
respective trademark names or registered trademark names.
•Other company and product names are trademarks or registered trademarks of their
respective companies.
Revisions
•1st Edition September 2002

ii IM 704510-01E
Checking the Contents of the Package
Unpack the box and check the contents before operating the instrument. If some of the
contents are not correct or missing or if there is physical damage, contact the dealer
from which you purchased them.
TA720
Check that the model name and suffix code given on the name plate on the rear panel
match those on the order.
MODEL
NO.
SUFFIX
Made in Japan
MODEL
NO.
SUFFIX
Made in Japan
MODEL
704510
SUFFIX
SUFFIX Description
Power cord -D UL/CSA Standards 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 SA Standard Power Cord (Part No.: A1024WD)
[Maximum Rated Voltage: 240 V, Maximum Rated Current: 10 A]
Options /C10 Ethernet + PC card drive
/E3 FET probe (700939), 2 probes
NO. (Instrument Number)
When contacting the dealer from which you purchased the instrument, please give them
the instrument number.
Standard Accessories
The standard accessories below are supplied with the instrument.
Part Name Model/Part Number Q’ty Description
1. Power cord A1006WD 1 See SUFFIX above.
2. Rubber feet A9088ZM 2 Two rubber feet in one set
3. Printer roll paper B9850NX 1 Thermalsensible paper, total length of 30 m
4. User’s Manual IM 704510-01E 1 User’s manual (this manual)
5. User’s Manual IM 704510-17E 1 Communication interface user’s manual
6. Power fuse A1351EF 1 A spare, attached to the fuse holder
2
3 5 , 6
1 4

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IM 704510-01E
Optional Accessories (Sold Separately)
The following optional accessories are sold separately.
For information and ordering, contact your nearest YOKOGAWA dealer.
Part Name Model/Part Number Minimum Q’ty Description
BNC cable 366924 1 BNC-BNC, length: 1 m
BNC cable 366925 1 BNC-BNC, length: 2 m
Rubber feet A9088ZM 2 Two rubber feet in one set
Rack mount kit 751535-E4 1 For EIA
Rack mount kit 751535-J4 1 For JIS
Spare Parts (Sold Separately)
The spare parts below are available for purchase separately.
Part Name Model/Part Number Minimum Q’ty Description
Printer roll paper B9850NX 5 Thermalsensible paper, total
length of 30 m
Power fuse A1351EF 2 250 V, 3.15 A
Checking the Contents of the Package

iv IM 704510-01E
Safety Precautions
This instrument is an IEC safety class I instrument (provided with terminal for protective
earth grounding).
The general safety precautions described herein must be observed during all phases of
operation. 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 following symbols are used on this instrument.
“Handle with care.” To avoid injury, death, or damage to the instrument, the
operator must refer to the explanation in the User’s Manual or Service Manual.
Alternating current
ON (power)
OFF (power)
ON (power) state
OFF (power) state

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IM 704510-01E
Make sure to comply with the precautions below. Not complying might result in injury or
death.
WARNING
•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.
•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 must be plugged into an outlet
with a protective earth terminal. Do not invalidate this protection by using an
extension cord without protective earth grounding.
•Protective Grounding
Make sure to connect the protective earth to prevent electric shock before
turning ON the power. The power cord that comes with the instrument is a
three-pin type power cord. Connect the power cord to a properly grounded
three-pin outlet.
•Necessity of Protective Grounding
Never cut off the internal or external protective earth wire or disconnect the
wiring of the protective earth terminal. Doing so poses a potential shock hazard.
•Defect of Protective Grounding
Do not operate the instrument if the protective earth or fuse might be defective.
Make sure to check them before operation.
•Fuse
To avoid the possibility of fire, only use a fuse that has a rating (voltage, current,
and type) that is specified by the instrument. When replacing a fuse, turn OFF
the power switch and unplug the power cord. Never short the fuse holder.
•Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable liquids or vapors.
Operation in such environments constitutes a safety hazard.
•Do Not Remove Covers
The cover should be removed by YOKOGAWA’s qualified personnel only.
Opening the cover is dangerous, because some areas inside the instrument
have high voltages.
•External Connection
Securely connect the protective grounding before connecting to the item under
measurement or an external control unit.
Safety Precautions

vi IM 704510-01E
Structure of the Manual
This user’s manual consists of the following sections:
Chapter 1 Names and Functions of Parts
Describes the names of each part of the instrument and its function. For keys, references are
given to sections (or pages) in the manual where operating procedures are explained.
Chapter 2 Explanation of Functions
Describes the measurement principles and functions of the instrument. Operating
procedures are not given in this chapter. However, reading this chapter will help you
understand the operating procedures given in the chapters that follow.
Chapter 3 Before Starting Measurements
Describes handling precautions, how to install the instrument, how to connect the
power supply, how to turn ON/OFF the power switch, how to connect cables and
probes, and how to set the date and time.
Chapter 4 Common Operations
Describes basic setup procedures, how to start/stop the acquisition of the input signal,
and basic operations of the keys and rotary knob.
Chapter 5 Setting the Sampling Mode and Measurement Function
Describes how to set the sampling mode and measurement function.
Chapter 6 Setting Measurement Conditions
Describes how to set measurement conditions such as gates, sampling interval,
arming, inhibit, block sampling, input coupling, input impedance, trigger mode, trigger,
and reference clock.
Chapter 7 Basic Display Setup
Describes how to configure the displays such as histograms, time variations, lists, and
statistics.
Chapter 8 Detailed Display Setup
Describes how to set the single, multi, or auto mode of each window, how to change
the scale, and how to read the measurement results using markers.
Chapter 9 Statistical Calculation and Inter-Symbol Interference Analysis
Describes how to set the range and items of statistical calculation and how to use the
inter-symbol interference analysis function.
Chapter 10 Storing Setup Information to the Internal Memory and Recalling
Setup Information
Describes how to store and recall setup information from the internal memory.
Chapter 11 Saving/Recalling Data and Outputting Screen Images
Describes how to save setup information, measured results, and computed results to a
floppy disk, PC card, or network drive, how to recall saved data, how to output screen
images, how to delete data, how to format the storage medium, and other operations.
Chapter 12 Ethernet Communications (Option)
Describes how to connect to the network and the setup procedure when connecting to
the network.
Chapter 13 Other Functions
Describes how to initialize the settings, how to calibrate the instrument, how to output external
signals, how to confirm current conditions, how to set the LCD, and other operations.
Chapter 14 Troubleshooting and Maintenance
Describes the possible causes of problems and their appropriate corrective actions.
Describes the messages that are displayed on the screen. Describes how to log errors,
perform self-tests, adjust the time base, carry out performance tests, and replace fuses.
Chapter 15 Specifications
Summarizes the specifications of the instrument in tables.
Index
Gives an index.

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IM 704510-01E
Conventions Used in This Manual
Unit
k: Denotes “1000.” Example: 680 kHz
K: Denotes “1024.” Example: 720 KB (Storage capacity of floppy disks)
Safety Markings
The following markings are used in this manual.
Danger. Refer to corresponding location on the instrument. 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.
WARNING Calls attention to actions or conditions that could cause serious
injury or death to the user, and precautions that can be taken to
prevent such occurrences.
CAUTION Calls attentions to actions or conditions that could cause light injury
to the user or damage to the instrument or user’s data, and
precautions that can be taken to prevent such occurrences.
Note
Calls attention to information that is important for proper operation
of the instrument.
Symbol Marks Used for Descriptions of Operations
On pages that describe the operating procedures in chapters 3 through 14, the following
symbols are used to distinguish the procedures from their explanations.
Procedure Describes the keys used during operation and the operating
procedures. In some cases, you may not have to follow the steps
in the order they are given.
Explanation Describes the details of the settings and the restrictions that exist
with the operating procedure. A detailed description of the function
is not provided in this section. See chapter 2 for a detailed
description of the functions.

viii IM 704510-01E
Contents
Checking the Contents of the Package ...........................................................................................ii
Safety Precautions .........................................................................................................................iv
Structure of the Manual ..................................................................................................................vi
Conventions Used in This Manual.................................................................................................vii
Chapter 1 Names and Functions of Parts
1.1 Front Panel and Rear Panel ............................................................................................ 1-1
1.2 Setting/Execution Key and Rotary Knob .......................................................................... 1-3
1.3 Display ............................................................................................................................. 1-5
Chapter 2 Explanation of Functions
2.1 Functional Differences from the TA520 ............................................................................ 2-1
2.2 System Configuration, Block Diagram, and Principles of Pulse Width Measurement ..... 2-2
2.3 Sampling Mode ................................................................................................................2-4
2.4 Measurement Function (Measurement Item) ................................................................... 2-5
2.5 Setting Measurement Conditions ..................................................................................... 2-7
2.6 Displaying the Measured/Calculated Results ................................................................ 2-13
2.7 Statistical Calculation and Inter-Symbol Interference Analysis ...................................... 2-21
2.8 Other Functions ............................................................................................................. 2-26
Chapter 3 Before Starting Measurements
3.1 Handling Precautions ....................................................................................................... 3-1
3.2 Installing the TA720.......................................................................................................... 3-3
3.3 Connecting to the Power .................................................................................................. 3-6
3.4 Turning ON/OFF the Power Switch.................................................................................. 3-7
3.5 Connecting Cables and Probes ....................................................................................... 3-8
3.6 Calibrating the Probe (Phase Correction) ...................................................................... 3-10
3.7 Setting the Date/Time .................................................................................................... 3-12
Chapter 4 Common Operations
4.1 Basic Setup Procedure .................................................................................................... 4-1
4.2 Starting/Stopping Measurements ..................................................................................... 4-2
4.3 Basic Operation of Keys and Rotary Knob ...................................................................... 4-3
4.4 Entering Values and Character Strings ............................................................................ 4-4
Chapter 5 Setting the Sampling Mode and Measurement Function
5.1 Setting the Sampling Mode .............................................................................................. 5-1
5.2 Setting the Period Measurement ..................................................................................... 5-2
5.3 Setting the A-to-B Time Interval Measurement ................................................................ 5-3
5.4 Setting the Pulse Width Measurement ............................................................................. 5-5
5.5 Setting the Period A & Period B Measurement ................................................................ 5-7
5.6 Setting the Period A & A-to-B Time Interval Measurement .............................................. 5-8
5.7 Setting the Pulse Width A & A-to-B Time Interval Measurement .................................... 5-10
5.8 Setting the Pulse Width A & Pulse Width B Measurement............................................. 5-12