YOKOGAWA TA120F User manual

Digital Jitter Meter

IM 704430-01E

1st Edition

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PIM 103-01E

Notes

Thank you for purchasing the YOKOGAWA TA120F Digital Jitter Meter.
This User’s Manual contains useful information about the functions, operating
procedures, and handling precautions of the instrument. To ensure correct use, please
read this manual thoroughly before operation.
Keep this manual in a safe place for quick reference in the event a question arises.
The following two manuals, including this one, are provided as manuals for the TA120F.
If you purchased a TA120F with optional functions, read both manuals.

Manual Title Manual No. Description

TA120F Digital Jitter Meter IM704430-01E This manual. Explains all the functions
User’s Manual of the TA120F and their operating

procedures.

TA120F Digital Jitter Meter IM704430-51E Explains the optional functions of the
Optional Function User’s Manual TA120F and their operating

procedures.

• 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
YOKOGAWA’s permission is strictly prohibited.

Trademarks

Revisions

Company and product names used in this manual are trademarks or registered
trademarks of their respective holders.
Adobe and Acrobat are trademarks of Adobe System incorporated.

• First Edition July 2001

Disk No. HF14
1st Edition: July 2001 (YK)
All Rights Reserved, Copyright © 2001 Yokogawa Electric Corporation

IM 704430-01E

i

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.

TA120F

Check that the model name and suffix code given on the name plate on the rear panel
match those on the order.

LEVEL DC

JITTER DC

OUT

KEY
LOCK

(0 to +5V)

GP-IB (IEEE488)

WARNING

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

EXT

EQUALIZED RF/
MONITOR OUT

OUT

SLICED RF

OUT

(50 Ω)

(TTL) (TTL) (TTL) (TTL)

CLOCK

OUT

EXT ARM

IN

100 - 240V AC

100VA MAX 50/60Hz

MODEL
SUFFIX
NO.

CIRCUIT

BREAKER

INHIBIT

250V AC 3A

IN

3
A
M
P

MODEL

MODEL

SUFFIX

SUFFIX

NO.

NO.

Made in Japan

MODEL and SUFFIX codes

Model Suffix Code Specifications

704430 100-240 VAC
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 SAA Standard Power Cord (Part No.: A1024WD)

Option /E1 EXT I/O

/L1 Level measurement function
/BP1 BI-PHASE measurement function

* For information regarding options, see the TA120F Digital Jitter Meter Optional Function

User’s Manual (IM704430-51E).

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

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

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

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

NO. (Instrument number)

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

ii IM 704430-01E

Standard Accessories

The following standard accessories are supplied with the instrument:

Checking the Contents of the Package

Part Name Part Number Quantity Description

1.Power cord See the above table. 1 —

2.Rubber feet A9088ZM 1 Two rubber feet in one set

3.EXT I/O D-sub A1519JD/A1520JD 1 9 pin, male

connector

4.User’s Manual IM704430-01E 1 This manual

1.

* Included only when “EXT I/O” is specified as an option.

Optional Accessories (Sold Separately)

The optional accessories below are available for purchase separately. For information
and ordering, contact your nearest YOKOGAWA dealer.

Part Name Model Quantity Notes

150-MHz probe 700998 1 Input resistance: 10 MΩ, length: 1.5 m

BNC cable 366924 1 BNC-BNC, length: 1 m
BNC cable 366925 1 BNC-BNC, length: 2 m
50-Ω terminator 700976 1 —
EXT I/O D-Sub A1519JD/A1520JD 1 9 pin, male
connector
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

2.

*

3.

(10:1 and 1:1 switching type)

4.

IM 704430-01E

iii

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 of personnel 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)

In-position of a bistable push control

Out-position of a bistable push control

iv IM 704430-01E

Safety Precautions

Make sure to comply with the safety precautions below. Not complying might result in
injury or death.

WARNING

Power Supply

Ensure that the source voltage matches the voltage of the power supply before
turning ON the power.

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.

Do Not Operate in an Explosive Atmosphere

Do not operate the instrument in the presence of flammable liquids or vapors.
Operation in such environments is very dangerous.

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 to an external control unit.

IM 704430-01E

v

How to Use This Manual

Structure of the Manual

The User’s Manual consists of the following sections:

Chapter 1 Explanation of Functions

Describes the 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 2 Names and Uses of Parts

Describes the names and uses of each part of the instrument.

Chapter 3 Measurement Preparation and Common Operations

Describes preparations that are taken before making measurements such as handling
precautions, how to install the instrument, how to connect to the power supply, how to turn
ON/OFF the power switch, and how to connect the probe, and the procedure for entering
numeric values.

Chapter 4 Setting Measurement Conditions

Describes how to set the measurement conditions such as the measurement function,
equalizer, trigger mode, slice level, gate, arming, inhibit, and clock signal.

Chapter 5 Displaying the Measured Results

Describes how to operate the meter inidication and numeric display.

Chapter 6 Storing and Recalling Setup Information

Describes how to store and recall setup information from the internal memory.

Chapter 7 Outputting Signals, Initializing Setup Information, and Setting Key Lock

Describes how to output signals, initialize setup information, and set key lock.

Chapter 8 Communication Function

Describes the communication functions of the GP-IB interface.

Chapter 9 Troubleshooting and Maintenance

Describes the possible causes of problems and their appropriate corrective measures.
Describes the error codes and their appropriate corrective measures. Describes zero position
adjustment of the needle, self-tests, calibration, performance tests, circuit breakers, and other
information.

Chapter 10 Specifications

Describes the main specifications of the instrument.

Index

Index of contents.

vi IM 704430-01E

Conventions Used in this Manual

Displayed characters

• Bold characters used in the procedural explanations indicate characters that are

displayed on the panel keys for the respective procedure or the characters on the
screen.

• SHIFT+key means you will press SHIFT to turn ON the indicator that is located

above and to the left of SHIFT followed by the key. The action that is indicated
above the corresponding key is carried out.

Symbols

The following symbols are used in this manual:

How to Use This Manual

A symbol affixed to the instrument. Indicates danger to personnel
or instrument and the operator must refer to the User’s Manual.
The symbol is used in the User’s Manual as a mark on the
reference page.

WARNING

CAUTION

Note

Symbols used on pages in which operating procedures are given.

On pages that describe operating procedures in Chapter 3 through 9, the following
symbols are used to distinguish the procedures from their explanations:

Keys

Procedure

Explanation

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

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

Provides important information for the proper operation of the
instrument.

Indicates the keys related to the operation.

Carry out the procedure according to the step numbers. The
procedure is given with the premise that the user is carrying out the
procedure for the first time. Depending on the operation, you may
not need to carry out all the steps.

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. For a detailed description of the
function, see chapter 1.

IM 704430-01E

vii

How to Use This Manual

Digital Numbers and Characters

Because the TA120F uses a 7-segment LED display, numbers, alphabets, and
operation symbols are represented using the special characters below. Some of the
characters are not used.

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 704430-01E

Contents

1

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

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

How to Use This Manual ................................................................................................................vi

Chapter 1 Explanation of Functions

1.1 System Configuration and Block Diagram ....................................................................... 1-1

1.2 Measurement Principle .................................................................................................... 1-4

1.3 Measurement Functions (Measurement Items) ............................................................... 1-5

1.4 Acquisition Conditions for the Input Signal Being Measured ........................................... 1-7

1.5 Display ........................................................................................................................... 1-12

1.6 Signal Output ................................................................................................................. 1-13

1.7 Other Functions ............................................................................................................. 1-14

Chapter 2 Names and Uses of Parts

2.1 Front Panel ....................................................................................................................... 2-1

2.2 Rear Panel ....................................................................................................................... 2-2

Chapter 3 Measurement Preparation and Common Operations

3.1 Precautions on the Use of the Instrument........................................................................ 3-1

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

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

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

3.5 Connecting the Cable or Probe........................................................................................ 3-8

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

3.7 Setting the Numeric Value.............................................................................................. 3-11

2

3

4

5

6

7

8

Chapter 4 Setting Measurement Conditions

4.1 Setting the Measurement Function .................................................................................. 4-1

4.2 Setting the Equalizer ........................................................................................................ 4-4

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

4.4 Setting the Gate ............................................................................................................... 4-7

4.5 Setting the Arming ........................................................................................................... 4-9

4.6 Setting Inhibit ................................................................................................................. 4-12

4.7 Switching the Clock Signal (Applicable to D-to-C Jitter Measurements)........................ 4-14

4.8 Adjusting the Phase Difference between the Data Signal and the Clock Signal (Applicable

to D-to-C Jitter Measurements)...................................................................................... 4-15

Chapter 5 Displaying the Measured Results

5.1 Using the Analog Meter ................................................................................................... 5-1

5.2 Displaying the Numeric Value and Turning OFF the Numeric Display ............................. 5-2

Chapter 6 Storing and Recalling Setup Information

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

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

9

10

Index

IM 704430-01E

ix

Contents

Chapter 7 Outputting Signals, Initializing Setup Information, and Setting Key Lock

7.1 Setting the DC Output ...................................................................................................... 7-1

7.2 Outputting Other Signals.................................................................................................. 7-6

7.3 Backing Up the Setup Information ................................................................................... 7-8

7.4 Initializing the Setup Information ...................................................................................... 7-9

7.5 Displaying the Version Information ................................................................................. 7-11

7.6 Key Lock......................................................................................................................... 7-12

Chapter 8 Communication Function

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 Setting the Address.......................................................................................................... 8-5

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

8.6 Program Format ............................................................................................................... 8-7

8.6.1 Symbols Used in the Syntax .............................................................................. 8-7

8.6.2 Messages ........................................................................................................... 8-7

8.6.3 Commands ......................................................................................................... 8-9

8.6.4 Responses ....................................................................................................... 8-11

8.6.5 Data .................................................................................................................. 8-11

8.6.6 Synchronization with the Controller .................................................................. 8-13

8.7 Commands ..................................................................................................................... 8-15

8.7.1 A List of Commands ......................................................................................... 8-15

8.7.2 CALCulation Group .......................................................................................... 8-18

8.7.3 COMMunicate Group ....................................................................................... 8-20

8.7.4 DCOut Group ................................................................................................... 8-21

8.7.5 DISPlay Group .................................................................................................. 8-22

8.7.6 INPut Group ..................................................................................................... 8-23

8.7.7 MEASure Group ............................................................................................... 8-25

8.7.8 MEMory Group ................................................................................................. 8-26

8.7.9 RECall Group ................................................................................................... 8-28

8.7.10 SAMPle Group ................................................................................................. 8-29

8.7.11 SSTart Group ................................................................................................... 8-30

8.7.12 STARt Group .................................................................................................... 8-30

8.7.13 STATus Group ................................................................................................... 8-31

8.7.14 STOP Group..................................................................................................... 8-32

8.7.15 STORe Group................................................................................................... 8-32

8.7.16 UNIT Group ...................................................................................................... 8-33

8.7.17 Common Command Group .............................................................................. 8-34

8.8 Status Report ................................................................................................................. 8-36

8.8.1 About the Status Report ................................................................................... 8-36

8.8.2 Status Byte ....................................................................................................... 8-37

8.8.3 Standard Event Register .................................................................................. 8-38

8.8.4 Extended Event Register .................................................................................. 8-39

8.8.5 Output Queue and Error Queue ....................................................................... 8-40

x IM 704430-01E

Contents

8.9 Sample Program ............................................................................................................ 8-41

8.9.1 Before Programming ........................................................................................ 8-41

8.9.2 Sample Program Image ................................................................................... 8-41

8.9.3 Initialization, Error, and Functions for Execution .............................................. 8-42

8.9.4 Setting Measurement Parameters or Querying the Setting .............................. 8-45

8.9.5 Executing Single Measurement ........................................................................ 8-49

8.9.6 Querying the Measurement Statistics .............................................................. 8-50

8.10 ASCII Character Code ................................................................................................... 8-54

Chapter 9 Troubleshooting and Maintenance

9.1 Troubleshooting ................................................................................................................ 9-1

9.2 Error Code Description and Corrective Actions ............................................................... 9-2

9.3 Adjusting the Zero Position of the Needle........................................................................ 9-5

9.4 Performing a Self-Test ...................................................................................................... 9-6

9.5 Performing Calibration (Changing the Factory Default Calibration Value)........................ 9-9

9.6 Executing the Performance Test ..................................................................................... 9-13

9.7 Circuit Breaker ............................................................................................................... 9-27

9.8 Recommended Replacement Parts ............................................................................... 9-28

Chapter 10 Specifications

10.1 Signal Input and Trigger ................................................................................................. 10-1

10.2 Measurement Function .................................................................................................. 10-2

10.3 Gate, Arming, and Inhibit ............................................................................................... 10-2

10.4 Display ........................................................................................................................... 10-3

10.5 Time Base ......................................................................................................................10-3

10.6 Input/Output on the Rear Panel ..................................................................................... 10-4

10.7 GP-IB Interface .............................................................................................................. 10-5

10.8 General Specifications ................................................................................................... 10-6

10.9 Dimensional Drawings ................................................................................................... 10-7

1

2

3

4

5

6

7

8

Index

9

10

Index

IM 704430-01E

xi

Chapter 1 Explanation of Functions

1.1 System Configuration and Block Diagram

System Configuration

PC

• Remote control

• Data acquisition and analysis

Communications

Input inhibit signal
Input external arming signal
Input EXT I/O signal

*3

DC output of jitter
Monitor output of RF signal
Monitor output of equalized RF signal
Data signal (binarized signal) output
Clock signal output
EXT I/O output

*3

Level measurement output

BI-PHASE signal

TA120F

*2

*1

RF signal

TRIG

DATA

Input signal

Clock signal

1

Explanation of Functions

*1 BI-PHASE measurement function option
*2 Level measurement function option
*3 EXT I/O option

IM 704430-01E

1-1

1.1 System Configuration and Block Diagram

Block Diagram

*1

BI-PHASE

Auto Gain
Controller

RF IN

CLOCK IN

Input
AMP

Input
AMP

Equalizer

Compa
rator

Trigger
DAC

Programable

Delay

Buffer
AMP

Amplitude

Measure

Slicer

EQUALIZED RF/
MONITOR OUT

Signal

Multiplexer

&

Fractional

Pulse

Generator

*2

CPU KEY

T/V

Converter

/ A/D

Converter

Acquisition Controller

Phase

Locked

Loop

7 SEG

LED

Controller

DATA

1 to 2

GP-IB

Acquisition

Memory

1 to 2

EXT I/O

*3

Buffer

Meter

DAC

Jitter

DC OUT

DAC

Level

DC OUT

DAC

Buffer

AMP

Buffer

AMP

EXTERNAL
ARMING IN

ANALOG

METER

JITTER

DC OUT

LEVEL

DC OUT

*2

*1 BI-PHASE measurement function option
*2 Level measurement function option
*3 EXT I/O option

Signal Flow

The TA120F is a jitter meter for optical disks. It measures the 3T jitter*4 and D-to-C

*5

jitter

of optical disks that employ the EFM method.
After the amplitude of the RF signal that is input through the RF input connector (RF
IN) is adjusted by the AGC (Auto Gain Controller) circuit (cannot be turned OFF using
panel keys or communication commands)
OFF) by the equalizer. Then, the signal is converted into binary values through the
slicer circuit, thus becoming a data signal. The signal multiplexer selects either the
clock signal or the data signal or both according to the measurement function
(measurement item) that is selected. The acquisition controller controls the
acquisition of measured values according to the external arming signal (EXT ARM
signal) or the inhibit signal (INHIBIT Signal). The fractional pulse generator generates
fractional pulses from the signal that was selected by the signal multiplexer according
to the acquisition controller’s control. The pulse width of the fractional pulse is
converted into voltage by the time-voltage converter (T/V converter) and then digitized
using an A-to-D converter. Finally, the measured value is generated and stored in the
acquisition memory.
The RF signal and clock signal are necessary in order to measure the D-to-C jitter. In
some cases the clock signal is input through the clock input connector (CLOCK IN),
and in other cases the clock signal is regenerated by the PLL (Phased Locked Loop)
circuit based on the RF (data) signal. You can select either method. When applying a
clock signal to the clock input connector, you can adjust the phase difference between
the clock signal and the RF (data) signal using the programmable delay circuit. You
can adjust the phase difference by observing the analog meter.
The TA120F computes the data in the acquisition memory at high-speeds and
determines the jitter. The jitter that is calculated is displayed on the analog meter and
the 7-segment LED display.

*4 Pulse width jitter of the 3T data signal of a CD.
*5 Time difference jitter between the data signal and clock signal of a DVD.
*6 Automatically turned ON when the equalizer is ON or when the trigger mode is set to auto

mode or auto + manual mode.

Buffer

Buffer

AMP

Buffer

AMP

*6

, it is then equalized (can be turned ON/

INHIBIT

IN

SLICED
RF OUT

CLOCK

OUT

1-2

IM 704430-01E

1.1 System Configuration and Block Diagram

Signal flow of the BI-PHASE function (option)

*7

The signal applied to the BI-PHASE input terminal is binarized by the slicer and becomes
a data signal. The signal multiplexer selects the polarity of the pulse width to be
measured—from the rising slope to the falling slope (positive) of the data signal or from
the falling slope to the rising slope (negative)—depending on the measurement function
(measurement item) that you selected.

Signal flow of the level measurement function (option)

*7

The signal applied to the BI-PHASE input terminal or the RF input terminal is input to the
amplitude measurement circuit before the slicer, and the amplitude is measured. The
measured amplitude value is processed by the CPU and displayed as a numeric value
on the 7-segment LED.

Signal flow of the EXT I/O (option)

*7

The condition of the input signal at each pin of the EXT I/O terminal is read by the CPU,
and the stored setup information is recalled. In addition, the measurement result is also
output from the EXT I/O terminal.

*7 For details on the functions and operations, see the TA120F Digital Jitter Meter Optional

Function User’s Manual (IM704430-51E).

1

Explanation of Functions

IM 704430-01E

1-3

1.2 Measurement Principle

Pulse Width of the 3T Data Signal of a CD

The time shorter than the period of the reference clock is called the fractional time. In
general, since the 3T data signal and the reference 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 with a period equal to the sum of
the fractional time and a given time period.
If the period of the reference clock and the pulse width of the fractional pulses are taken
to be t0, T
multiple of the reference clock, N × t

3T = N × t0 + (Ta – Tb)

This instrument converts the pulse width (Ta, Tb) of the fractional pulse that it generated
at the beginning and end of the measurement to voltage values, which are then
converted to digital values using an 8-bit A/D converter.
3T is determined by substituting the pulse width of the fractional pulses that were
measured into the variables T

3T data signal of a CD

, and Tb, respectively, 3T can be broken into the following terms: integer

a

and Tb of the above equation.

a

Fractional time

Reference clock 1

T

a

12

Reference clock 2

Fractional pulse

, and the pulse width of the fractional pulses, Ta, Tb.

0

3T

Fractional time

N

0

t

T

b

Time-voltage conversion

3T = N × t0 + (Ta – Tb)
k: Coefficient used in the A/D conversion

∆Va = k × T

A/D conversion

a

Time Difference between the Data Signal and Clock Signal of a DVD.

Measurement is made using the same principle that is used in “Pulse Width of the 3T
Data Signal of a CD” above. The following points differ:

• The reference clock is either the clock signal that is applied to the clock input
connector or a clock signal that is regenerated by the PLL circuit.

• Tc, the pulse width of the fractional pulse at the beginning of the measurement, is the
D-to-C time difference (that is to be determined) between the data signal and the
clock signal.

DVD data signal

DVD clock signal

T

c

Fractional pulse

D-to-C

D-to-C = Tc
k: Coefficient used in the A/D conversion

c

1-4

Time-voltage conversion

∆Vc = k × T

A/D conversion

∆Vb = k × T

A/D conversion

b

IM 704430-01E

1.3 Measurement Functions (Measurement Items)

3T Jitter «See 4.1 for the operating procedure»

3T measurement

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 3T data signal of a compact disk (CD).

* Slope refers to the movement of the signal from a low level to a high level (rising edge) or

from a high level to a low level (falling edge).

Example of pulses on the positive side

Measurement Measurement Measurement Measurement

Data
signal

×N speed setting

You can set the ×N speed of the drive being measured during 3T measurement. You
can select ×1, ×4, and ×N (manual setting, where N is a value between 1.0 and 10.0).

Jitter σ, jitter ratio σ/T and average value

Determines a histogram (frequency distribution) from the measured values of multiple
pulses residing in the range from 2.5T to 3.5T (T = 231.385 ns), and calculates the
standard deviation σ from the histogram. This standard deviation σ is the 3T jitter.
The 3T jitter ratio is derived by dividing the standard deviation σ by the period of the
CD clock signal of 231.385 ns. The time-averaged value of the measured pulse width
signal is the average value AVE.

1

Explanation of Functions

• 3T average value

• 3T jitter

• 3T jitter ratio

n

σ

T

(Xi × Pi)

Σ

i = 1

n

i = 1

× 100(%)

AVE =

σ = Σ (Xi – AVE)2 × P

i

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: The period of the CD clock signal. When the speed is 1,

the period is 231.385 ns. When the speed is N, the
period is 231.385 ns/N.

Note

You can also read statistics other than jitter, jitter ratio and average value by making inquiries
using communication commands. For details, see section 8.7.2, “CALCulation Group.”

IM 704430-01E

1-5

1.3 Measurement Functions (Measurement Items)

D-to-C Jitter «See 4.1 for the operating procedure»

Time difference measurement

Measures the time difference between the rising (or falling) edge of the data signal to
the first rising (or falling) edge of the clock signal of a digital versatile disk (DVD).

• Example 1
Slope of the data signal : Rising
Slope of the clock signal : Rising

Measurement Measurement

Data
signal

Clock
signal

• Example 2
Slope of the data signal : Both rising and falling
Slope of the clock signal : Rising edge

Measurement Measurement Measurement

Data
signal

Clock
signal

Jitter σ and jitter ratio σ/T

Determines a histogram (frequency distribution) from multiple measured values of
time difference, and calculates the standard deviation σ from the histogram. This
standard deviation σ is the D-to-C jitter. The D-to-C jitter ratio is derived by dividing
the standard deviation σ by the period T of the DVD clock signal. The time-averaged
value of the measured time difference signal is the average value AVE.

• Average value

• Jitter

• Jitter ratio

n

AVE =

σ = Σ (Xi – AVE)2 × P

σ

T

Xi × P

Σ (

i = 1

n

i = 1

× 100(%)

i

)

i

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:The period of the DVD clock signal.

(Varies depending on the measured signal, because it is
measured simultaneously with the data signal.)

Note

You can also read statistics other than jitter, jitter ratio and average value by making inquiries
using communication commands. For details, see section 8.7.2, “CALCulation Group.”

1-6

IM 704430-01E

1.4 Acquisition Conditions for the Input Signal Being Measured

Equalizing of RF Signals (Equalizer) «See 4.2 for the operating procedure»

You can equalize (compensate) 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 RF
input connector through the equalizer, we 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).

1

Explanation of Functions

Frequency characteristics
of the signal applied to the
RF input connector

Amplitude

Frequency

Binarization of the RF Signal

The binarized data signal of the RF signal is the signal used to measure the pulse width
and time difference. Using the slicer of the TA120F, 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 setting the trigger mode

and slice level, see “Trigger Level and Slice Level” described later.

RF signal

Data signal

Auto slice

To compensate for asymmetric signal waveforms specific to the CD or DVD, the slice
level can be automatically detected so that the time ratio between 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.”

Frequency characteristics
of the equalizer

Amplitude

Frequency

Slice level

Frequency characteristics
of the signal after passing
through the equalizer

Amplitude

Frequency

IM 704430-01E

RF signal

Slice level

Data signal

1-7

The specified slice level

RF signal

Data signal

Center value of the amplitude

Trigger is activated
(When the polarity or slope setting is )

1.4 Acquisition Conditions for the Input Signal Being Measured

Trigger Mode and Slice Level «See 4.3 for the operating procedure»

When measuring the pulse width or time 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 level at which the RF signal is binarized. The trigger is activated at this
slice level.

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 setting is )

Manual mode

The RF signal is binarized using the slice level that is specified in the range from –5 V
to 5 V (–1 V to 1 V when the equalizer is in operation).

Center value of the amplitude

Auto + manual mode

The RF signal is binarized using the slice level obtained by superimposing the offset
level that is specified in the range from –1V to 1V on the slice level that is detected by
the auto slice function. This offset level 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 setting is )

(Offset) level that is superimposed

Slice level for auto + manual mode

Center value of the amplitude

1-8

IM 704430-01E

1.4 Acquisition Conditions for the Input Signal Being Measured

Gate «See 4.4 for the operating procedure»

You can set the time (gate time) during which the measured values of pulse width and
time difference are stored in the acquisition memory. You can also set a gate by
specifying the number (number of events) of measured values to be acquired.

Event gate

5

10

measured values are stored in the acquisition memory. Of those values, the ones
that are in the measurement range, as determined by the measurement function, are
used to derive the measurement result (jitter). You cannot change the number of
events.

Time gate

You can select from 0.1 s, 0.5 s, and manual (1 ms to 1000 ms).

Arming «See 4.5 for the operating procedure»

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

Auto arming (internal arming)

The internal signal of the TA120F is the arming source. Arming is the cue used to
start the first measurement (the first trigger).

1

Explanation of Functions

External arming

Arming is activated when an external signal (arming source) is applied to the external
arming input connector. 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. You can set the delay time
in the range from 0 ms to 1000 ms.

IM 704430-01E

1-9

1.4 Acquisition Conditions for the Input Signal Being Measured

Inhibit «See 4.6 for the operating procedure»

You can inhibit measurements by applying an external signal to the INHIBIT input
connector. 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 a positive 3T jitter
measurement is indicated below.

Relation between the inhibit signal and gating

Inhibit measurement

Inhibit

Gate open

Gate

Data signal

S1 S2 S3

Start measurement Resume measurement

S: Measured value

Relation between the inhibit signal, gating, and external arming

Not measured

S4 S5

Inhibit measurement

Inhibit

Gate

External arming

Data signal

Gate open

Not measured

S1 S2 S3 S4 S5

Start measurement

S: Measured value

Resume measurement

Relation between the inhibit signal, gating, external arming, and arming delay

Inhibit measurement

Inhibit

Gate

Arming delay

External arming

Data signal

Gate open

Not measured

S1 S2 S3 S5S4

Start measurement Resume

S: Measured value

measurement

1-10

IM 704430-01E

1.4 Acquisition Conditions for the Input Signal Being Measured

Clock Signal Input

Regenerating the clock signal «See 4.7 for the operating procedure»

The clock signal that is necessary in measuring the D-to-C jitter can be regenerated
by the PLL circuit of the TA120F. You can also measure the time difference by
applying a DVD clock signal to the clock input connector instead of regenerating the
clock signal using the PLL circuit.

Selecting the slope «See 4.1 for the operating procedure»

When using the clock signal that is applied to the clock input connector for measuring
the D-to-C jitter, you can select on which slope (rising edge or falling edge) of the
clock signal to make the measurement.

Adjusting the phase difference «See 4.8 for the operating procedure»

When using the clock signal that is applied to the clock input connector for measuring
the D-to-C jitter, you can adjust the phase difference between the data signal and the
clock signal. You can adjust the phase difference within the range 0 ns to 40 ns.

1

Explanation of Functions

IM 704430-01E

1-11

1.5 Display

Meter Display «See 5.1 for the operating procedure»

The TA120F indicates the jitter ratio, phase difference, etc. on the analog meter.

Jitter ratio indication

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

Phase difference indication <<See 4.8 for the operating procedure>>

The phase difference between the data signal and the clock signal applied to the
clock input connector during D-to-C jitter measurement is indicated on the analog
meter. The indication range is from 0 deg to 360 deg.

Numeric Display «See 5.2 for the operating procedure»

The TA120F displays numeric values and characters such as the jitter, jitter ratio,
specified value, error code, and firmware version on the 7-segment LED display.

Numeric display of jitter/jitter ratio and average value

The jitter or jitter ratio of the selected measurement function or the average value that
is derived in the process of determining the jitter and jitter ratio is displayed using a
numeric value. You can switch the display between jitter, jitter ratio, and average
value.

Turning OFF the jitter, jitter ratio and average value numeric display

If it is undesirable to view the changes in the numeric display of the jitter, jitter ratio or
average value, the characters “d-oFF” can be displayed instead of these values.

Specified value display

When specifying values for setting up the TA120F such as manual setting of ×N
speed, manual setting of gate time, arming delay setting, slice level setting when the
trigger mode is set to manual mode or auto + manual mode, phase adjustment
setting, and address setting for GP-IB communications, the corresponding specified
value is displayed.

Error code display

An error code is displayed when an error occurs during operation or measurement.
For details on the error codes and information, see section 9.2.

Version display

The firmware version (ROM version) of the TA120F can be displayed. (section 7.5)
The firmware version is also displayed when entering the maintenance mode (section

9.4) of the TA120F.

1-12

IM 704430-01E

1.6 Signal Output

DC Output of Jitter «See 7.1 for the operating procedure»

The jitter ratio of the selected measurement function can be converted to DC voltage (0
V to 5 V) and output from the jitter DC output connector on the rear panel. You can also
change the jitter ratio that corresponds to 0 V and 5 V.

Jitter ratio determination

You can specify the determination level in terms of a jitter ratio and output 5 VDC
when the data signal is less than or equal to the determination level and 0 VDC when
it is greater than the determination level.

DC output filter

This function takes a moving average of the measured jitter. When the DC output
fluctuates due to instability in the measured jitter, this function suppresses the degree
of fluctuation. You can set the number of measured values (average coefficient) to be
averaged in the range from 1 to 10.

When the average coefficient is set to 5

1

Explanation of Functions

Measured
Jitter Ratio

Jitter Ratio
after Moving
Average

D

B

C

A

G

F

E

Time

c

b

a

Time

Monitor Output of RF Signal/Monitor Output of Equalized RF Signal «See 7.2 for the
operating procedure»

You can output the RF signal that is applied to the RF input connector directly to the
monitor output on the rear panel. If the equalizer is activated, the equalized RF signal is
output.

Data Signal Output «See 7.2 for operating procedure»

You can output the data signal obtained by slicing and binarizing the RF signal from the
data signal output connector on the rear panel at TTL levels.

Clock Signal Output «See 7.2 for operating procedure»

You can output the clock signal that is applied to the clock input connector or the clock
signal that is regenerated by the PLL circuit from the clock signal output connector on the
rear panel at TTL levels.

IM 704430-01E

1-13

1.7 Other Functions

Communications (GP-IB) «See chapter 8 for the operating procedure»

The GP-IB Interface comes standard with the TA120F. You can output the jitter or jitter
ratio of the selected measurement function to a PC or control the TA120F from an
external controller.

Storing and Recalling Setup Information «See chapter 6 for the operating procedure»

Up to seven sets of setup information can be stored in the internal non-volatile memory.
You can also recall the stored setup information and change the settings.

Backing Up Setup Information «See 7.3 for the operating procedure»

The setup information is stored using a lithium battery. When the power switch is turned
ON, the TA120F starts the measurement using the settings that existed immediately
before the power switch was turned OFF. If the setup information can no longer be
stored due to a dead lithium battery, the TA120F is reset to the factory default settings.

Initializing Setup Information «See 7.4 for the operating procedure»

The TA120F has the following two methods of initializing the setup information.

• Initialization to factory default settings

• Initialization of the information excluding the following settings:

Communication address
Stored information in the internal memory

Version Display «See 7.5 for the operating procedure»

The firmware version (ROM version) of the TA120F can be displayed.

Key Lock «See 7.6 for the operating procedure»

You can disable the front panel key operation.

Adjusting the Zero Position of the Needle «See 9.3 for the operating procedure»

You can adjust the zero position of the needle.

Self-Test «See 9.4 for the operating procedure»

If you are in doubt as to whether the instrument has malfunctioned, you can run a self­test before contacting a YOKOGAWA dealer. You can check things such as the keys,
rotary knob, indicator, meter, and board.

Calibration «See 9.5 for the operating procedure»

Using the internal calibration signal, the offset voltage of the input amplifier and the
conversion coefficient of the time-voltage converter can be calibrated.

Detection of a Cooling Fan Malfunction

The condition of the cooling fan is monitored at all times. If the fan stops, error code 906
is shown on the display. In this case, immediately turn OFF the power. If you continue
to use the instrument, a warning is given approximately every 10 s by displaying the
error code until the cooling fan recovers.

1-14

IM 704430-01E

Chapter 2 Names and Uses of Parts

2.1 Front Panel

KEY LOCK indicator

Lights when key lock is ON (section 7.6)

Measurement indicator

Lights or blinks when the measured results are shown on the display

Setup indicator

Lights when setup value is shown on the display (section 3.7, chapter 4, 7 and section 9.6)

Display

Displays measured results, setup values, setup items, and other information on the 7-segment LED
(chapters 4, 5 and 7)

Unit indicator

The unit for the measured result or setup value shown on the display lights

MEAS key

Switches the measured result shown on the display, initializes
settings, and executes performance test (sections 5.2, 7.4 and 9.6)

MEAS

KEY

σσ

LOCK

2

POWER

Power switch

(Section 3.4)

DIGITAL JITTER METER

SETAVE/T

4

8

4

0

6

12

180

%

Adjustment trimmer

(Section 9.3)

msns

us

8

16

PRESET

10

20

g

e

d

PHASE

10 20

SCALE

MEAS

%

Handle

Move the TA120F (section 3.1)

Meter

Visually adjust the phase difference, indicates the
measured results, and adjusts the zero position of the
needle (sections 4.8, 5.1, and 9.3)

SCALE key

Selects the meter scale and operates preset function,
self-test, calibration, etc. (sections 4.1, 4.2, chapter 6,
sections 9.4 to 9.6)

DATA key

Sets the polarity or slope of the data signal and turns ON/OFF
the equalizer (sections 4.1 and 4.2)

Utility/Arrow (<) key

Moves along the digits when setting numeric values, sets the boost amount
of the equalizer, and operates initialization procedure, DC output, ON/OFF
of the numeric display, version display and maintenance functions such as
self-test and calibration (sections 3.7, 4.2, chapter 7, and section 9.4 to 9.6)

Option/Arrow (>) key

Moves along the digits when setting numeric values, selects setup
items, and operates maintenance functions such as self-test and
calibration (sections 3.7, 4.2, chapter 7, and section 9.4 to 9.6)

Rotary knob

Sets numeric values, selects setup information/items
and operates maintenance functions such as self­test, calibration, and performance test (section 3.7,
chapters 4, 6, 7, sections 8.4 and 9.4 to 9.6)

FUNC key

Selects the measurement function,

UTILITY OPTION

sets the ×N speed, and operates
the self-test (sections 4.1 and 9.4)

GATE key

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

BI-PHASE

RF

ARM INH

SHIFT

CLOCK

PHASE

CLOCK

Sets the gate and gate time and operates
the self-test (sections 4.4 and 8.9)

ARM key

Sets arming and arming delay and operates
the self-test (sections 4.5 and 9.4)

INH key

Sets inhibit and operates the
self-test (sections 4.6 and 9.4)

Remote indicator

Lights when the TA120F is in the remote
mode through communications (section 8.2)

SHIFT key

Press this key to light the indicator and then
press a key to set the item indicated above
each key (sections 4.1 to 4.5, 4.7, 7.1, and

1M 40Vpk

8.4)
Operates DC output, calibration, and

performance test (sections 7.1, 9.5, and 9.6)

LOCAL key

Releases the remote control through
communications, sets the GP-IB address,
and operates calibration (sections 8.2, 8.4,
and 9.5)

PHASE key

Adjusts the phase (sections 4.8)

CLOCK key

Sets the clock signal (section 4.7)

RF signal input indicator

Blinks when the trigger is activated on the RF signal input

Signal input connector

Connects the measurement cable for the RF signal,
clock signal or BI-PHASE signal (option*) (section 3.5)

BI-PHASE signal input indicator

Blinks when the trigger is activated on the BI-PHASE signal input

TRIG key

Sets the trigger mode and slice level (section 4.3)

2

Names and Uses of Parts

* See the TA120F Digital Jitter Meter Option Function User's Manual (IM704430-51E).

2-1IM 704430-01E

2.2 Rear Panel

Jitter DC output connector

DC output of jitter ratio or determination output (section 7.1)

Level DC output connector (option)*

EXT I/O terminal (option)*

Monitor output connector

Monitor output of RF signals or monitor output of equalized RF signals (section 7.2)

Data signal output connector

Outputs the binarized signal of the RF signal (section 7.2)

Clock signal output connector

Outputs the clock signal that is applied to the clock input
connector or the clock signal that is regenerated by the PLL
signal (section 7.2).

External arming input connector

Inputs the external arming signal (section 4.5)

Inhibit input connector

Inputs the inhibit signal (section 4.6)

KEY
LOCK

JITTER DC

OUT

(0 to +5V)

GP-IB (IEEE488)

LEVEL DC

OUT

(0 to +5V)

EXT

EQUALIZED RF/
MONITOR OUT

(50 Ω)

SLICED RF

OUT

(TTL) (TTL) (TTL) (TTL)

WARNING

GP-IB connector

Connect the GP-IB cable (section 8.3)

Warning and caution plate

Safety precautions (pages iv and v)
Precautions on the use of the instrument (section 3.1)

KEY LOCK switch

Turns ON/OFF the key lock (section 7.6)

CIRCUIT

BREAKER

EXT ARM

CLOCK

OUT

Vent holes

Install the TA120F (section 3.2)

INHIBIT

IN

IN

100 - 240V AC

100VA MAX 50/60Hz

MODEL
SUFFIX
NO.

250V AC 3A

3
A
M
P

Circuit breaker

Reset method (section 9.8)

Power connector

Connect the power supply (section 3.3)

Name plate

Check the product (page ii)

* See the TA120F Digital Jitter Meter Option Function User's Manual (IM704430-51E).

2-2

IM 704430-01E

Chapter 3 Measurement Preparation and Common Operations

3.1 Precautions on the Use of the Instrument

Safety Precautions

Safety Precautions

When using the instrument for the first time, make sure to read the “Safety
Precautions” given on pages iv and v.

Do not remove the cover

Do not remove the cover from the instrument. Some sections inside the instrument
have high voltages that are extremely dangerous. For internal inspection or
adjustment, contact your nearest YOKOGAWA dealer as listed on the back cover of
this manual.

Abnormal behavior

Stop using the instrument if there are any symptoms of trouble such as strange odors
or smoke coming from the instrument. If these symptoms ocurr, immediately turn
OFF the power and unplug the power cord. Contact your nearest YOKOGAWA
dealer as listed on the back cover of this manual.

When the cooling fan stops

If error code 906 appears on the display, the cooling fan is stopped. Immediately turn
OFF the power switch. From the rear panel, check for and remove any foreign object
that may be obstructing the cooling fan. If error message 906 appears when you turn
ON the power switch again, it is probably a malfunction. Contact your nearest
YOKOGAWA dealer as listed on the back cover of this manual.

3

Measurement Preparation and Common Operations

Power cord

Nothing should be placed on top of the power cord. The power cord should also be
kept away from any heat sources. When unplugging the power cord from the outlet,
never pull by the cord itself. Always hold and pull by the plug. If the power cord is
damaged, check the part number indicated on page ii and purchase a replacement.

IM 704430-01E

3-1

3.1 Precautions on the Use of the Instrument

General Handling Precautions

Do not place objects on top of the instrument

Never place any objects containing water on top of the instrument. Water spills can
lead to malfunction.

Do not apply shock or vibration to the instrument

Shock or vibration can lead to malfunction. Take extra caution because the built-in
meter is sensitive to vibration and shock. In addition, applying shock to the input
terminal or the connected cable can cause electrical noise to enter the instrument.

Do not bring charged objects near the instrument

Do not bring charged objects near the input connector. This can damage the internal
circuitry.

When not using the instrument for a long period of time

Turn OFF the power switch and remove the power cord from the outlet.

When carrying the instrument

First, remove the power cord and connection cables. The weight of the instrument is
approximately 5 kg. To carry the instrument, use the handle as shown in the figure
below, and move it carefully.

3-2

When wiping off dirt

When wiping off dirt from the case or operation panel, turn OFF the power switch and
remove the power cord from the outlet. Then, gently wipe with a soft dry clean cloth.
Do not use volatile chemicals as this may cause discoloring and deformation.

IM 704430-01E

3.2 Installing the Instrument

WARNING

To avoid the possibility of fire, never use the instrument with the rear panel
facing down. There are vent holes for the cooling fan on the rear panel. Placing
the instrument with the rear panel down can cause a fire when the instrument
malfunctions. If you must use the instrument with the rear panel down, place a
metal plate or a flame-resistive barrier (grade UL94V-1 or higher) beneath the
instrument.

3

Measurement Preparation and Common Operations

Note

Installation Condition

Install the instrument in a place that meets the following conditions:

Flat and even surface

Well-ventilated location

The specification of the meter presumes that the TA120F is installed horizontally and that the
meter is in the vertical position. The specifications of the meter cannot be satisfied when the
instrument is installed with the rear panel down.

Install the instrument in a stable horizontal place. Accurate measurements may be
hindered when the instrument is used in an unstable place or tilted position.

There are vent holes on the topside of the instrument. In addition, there are vent
holes for the cooling fan on the rear panel. To prevent internal overheating, allow for
enough space around the instrument (see the figure below) and do not block the vent
holes.

10 cm or
more

IM 704430-01E

3-3

3.2 Installing the Instrument

Ambient temperature and humidity

Note

Do not install the instrument in the following places:

Use the instrument in the following environment.

• Ambient temperature: 5°C to 40°C
However, in order to obtain highly accurate measurements, operate the instrument
in the 23 ± 5°C temperature range.

• Ambient humidity: 20% to 80% RH
No condensation should be present. However, in order to obtain highly accurate
measurements, operate the instrument in the 50 ± 10% RH range.

Condensation may occur if the instrument is moved to another place where the ambient
temperature is higher, or if the temperature changes rapidly. In this case, let the instrument
adjust to the new environment for at least an hour before using it.

• In direct sunlight or near heat sources.

• Where an excessive amount of soot, steam, dust, or corrosive gas is present.

• Near strong magnetic field sources.

• Near high voltage equipment or power lines.

• Where the level of mechanical vibration is high.

• In an unstable location.

Storage Location

When storing the TA120F, avoid the following locations:

• A place with a relative humidity of 80% or more.

• In direct sunlight.

• A hot place with a temperature of 60°C or more.

• Near a high humidity or heat may source.

• Where mechanical vibration is high.

• A place with corrosive gases or flammable gases.

• A place with a lot of dust, trash, salt, or iron powder.

• A place where water, oil, or chemicals splash.

We strongly recommend you store the TA120F in an environment with a temperature
between 5°C and 40°C and a relative humidity between 20% to 80% RH.

3-4

IM 704430-01E

Installation Position

3.2 Installing the Instrument

Desk top

Install the instrument horizontally.

3

Measurement Preparation and Common Operations

Note

It is possible to install the TA120F with the stand in the upright position. However, note that
the specification of the meter presumes that the TA120F is installed horizontally and that the
meter is in the vertical position. When using the stand, pull the stand forward until it locks
(perpendicular to the bottom surface of the instrument). If you are installing the instrument on
a slippery surface, attach the rubber feet (two pieces, included in the package) to the hind
feet. If you are not using the stand, return it to the original position while pressing the leg
section of the stand inward.

Rack mount

When rack mounting the TA120F, use the rack mount kit that is sold separately. For
the procedure on attaching the TA120F to a rack, see the User’s Manual included in
the rack mount kit.

Part Name Model Notes

Rack mount kit 751533-E3 For EIA single mount
Rack mount kit 751534-E3 For EIA dual mount
Rack mount kit 751533-J3 For JIS single mount
Rack mount kit 751534-J3 For JIS dual mount

IM 704430-01E

3-5

3.3 Connecting the Power Supply

Before Connecting the Power Supply

To prevent the possibility of electric shock and damage to the instrument, follow the
warnings below.

WARNING

• Ensure that the supply voltage matches the rated supply voltage of the
instrument before connecting the power cord.

• Check that the power switch is turned OFF before connecting the power cord.

• To prevent the possibility of electric shock or fire, be sure to use the power cord

supplied by YOKOGAWA.

• Make sure to perform protective grounding to prevent the possibility of electric
shock. Connect the power cord to a three-pin power outlet with a protective
earth terminal.

• Do not use an extension cord without protective earth ground. Doing so will
invalidate the protection.

Connecting the Power Cord

1. Check that the power switch on the front panel of the instrument is turned OFF.

2. Connect the power cord plug to the power connector on the rear panel. (Use

the power cord that came with the package.)

3. Connect the plug on the other end of the power cord to the outlet that meets the

conditions below. The AC outlet must be of a three-pin type with a protective
earth ground terminal.

Item Specifications

Rated supply voltage 100 V to 240 VAC
Permitted supply voltage range 90 V to 264 VAC
Rated supply voltage frequency 50/60 Hz
Permitted supply voltage frequency range 48 Hz to 63 Hz
Maximum power consumption 100 VA

3-6

3-pin outlet

Power cord
(included in the package)

IM 704430-01E

3.4 Turning ON/OFF the Power Switch

Things to Check before Turning ON the Power

• Is the instrument properly installed? → Section 3.2, “Installing the Instrument”

• Is the power cord properly connected? → Section 3.3, “Connecting the Power Supply”

Location of the Power Switch and ON/OFF Operation

The power switch is located at the lower left corner of the front panel. The power switch
is a push button. Press once to turn it “ON” and press again to turn it “OFF.”

OFF ON

Power Up Operation

When the power switch is turned ON, “TA120F→704430” appears on the 7-segment
LED display and the test program automatically starts. When the test program
completes normally, “PASS” is shown on the display and the TA120F is ready to make
measurements. The setup conditions are restored to the ones that existed immediately
before the power switch was turned OFF.

3

Measurement Preparation and Common Operations

Note

If the TA120F does not operate as described above when the power switch is turned ON, turn
OFF the power switch and check the following points:

• Is the power cord securely connected?

• Is the correct voltage coming to the power outlet? → See section 3.3.

• Is the circuit breaker ON? → See section 9.7.

• You can initialize the settings of the TA120F. There are two methods of initialization. See

section 7.4.

• Turn ON the power switch while pressing MEAS → the setup information is initialized
to the factory default condition.

• Press SHIFT+<(UTILITY) and select init → the setup information excluding the
communication address and setup information stored to the memory is initialized.

If the instrument still fails to power up when the power switch is turned ON after checking
these points, it is probably a malfunction. Please contact your nearest YOKOGAWA dealer
as listed on the back cover of this manual for repairs.

To Make Accurate Measurements

Under the installation condition indicated in section 3.2, allow the instrument to warm up for at
least 30 minutes after the power switch is turned ON before starting the use of the instrument.

Shutdown Operation

The setup information that exists immediately before the power switch is turned OFF is
stored. This holds true also when the power cord becomes unplugged. Note that the
measured results are not stored.

Note

The lithium battery that is used to store the setup information has a limited life span. When
the voltage level of the lithium battery drops below a given level, error code 909 appears on
the display when the power switch is turned ON. If the error code appears frequently, the
lithium battery must be replaced quickly. The user cannot replace the battery. Contact your
nearest YOKOGAWA dealer as listed on the back cover of this manual. For the life span of
the battery, see section 9.8.

IM 704430-01E

3-7

3.5 Connecting the Cable or Probe

Position of the Signal Input Connector

The signal input connector is located at the lower right section of the front panel.
Connect a cable or a probe with a BNC connector.

BI-PHASE

Signal Input Specifications

Item Specifications

Connector type BNC
Number of channels 2 (1 RF input connector and 1 clock input connector)
Input impedance 1 MΩ, 35 pF (typical value*)
Maximum input voltage DC ≤ frequency of the input signal ≤ 100 kHz:

Ground Connect to the case ground
* The typical value is a representative or standard value. It is not a warranted value.

Do not apply a voltage that exceeds the maximum input voltage to the input
connector. This may cause damage to the input section.

RF

1M 40Vpk

CLOCK

40 V (DC+ACpeak)

100 kHz ≤ frequency of the input signal ≤ 100 MHz:

{3.5/f + 5} V (DC+ACpeak), where f is a frequency in MHz.

CAUTION

3-8

Note

When connecting the probe for the first time, perform phase correction of the probe according
to the description given in section 3.6. Failure to do so will cause unstable gain across
different frequencies, thereby preventing correct measurement. Phase correction of the
probe must be performed when the probe changes or the TA120F changes.

IM 704430-01E

3.6 Phase Correcting the Probe

Items Required

The following items are required:

Compensation signal

Frequency Approx. 1 kHz
Voltage (waveform amplitude) Approx. 1 V
Waveform type Rectangular wave
Output impedance Approx. 1 MΩ
Recommended signal Probe compensation signal of Digital Oscilloscope DL1740

(YOKOGAWA)

Waveform monitor

Frequency characteristics DC to 100 MHz (–3 dB point)
Input coupling DC
Input impedance Connect a 50-Ω terminator to the input connector of the

waveform monitor.

Recommended instrument Digital Oscilloscope DL1740 (YOKOGAWA) and a 50-Ω

terminator (700976, YOKOGAWA)

The connection procedure and operation when the recommended signal is
connected to the recommended instruments are described below.

Connecting the Instrument

P-P

3

Measurement Preparation and Common Operations

CAUTION

• Do not apply a voltage that exceeds the maximum input voltage to the input
connector. This may cause damage to the input section.

• Do not short the probe compensation signal output terminal of the DL1740 or
the monitor output connector of the TA120F. Do not apply external voltage to
the monitor output connector. This may cause damage to the internal circuitry.

Check that the TA120F and DL1740 are turned OFF and connect them as shown in the figure.

1. Using a BNC cable, connect the monitor output connector on the rear panel of

the TA120F and the signal input connector of the DL1740.

2. Connect the BNC end of the probe that is to be phase corrected to the RF input

connector on the front panel of the TA120F.

3. Connect the other end of the probe to the probe compensation signal output

terminal of the DL1740 and the ground wire to the functional ground terminal.

Monitor output connector

BNC cable

TA120F

DL1740

50-Ω terminator
Signal input connector

IM 704430-01E

RF input connector

Phase correction hole

Probe compensation signal
output terminal

Functional ground terminal

3-9

3.6 Phase Correcting the Probe

Procedure

1. Turn ON the TA120F and DL1740.

2. Turn OFF the equalizer of the TA120F (see section 4.2).

3. Set the waveform acquisition conditions of the DL1740 so that approximately

4. Insert a flat-head screwdriver to the phase correction hole of the probe and turn

Explanation

The necessity of phase correction of the probe

If the input capacity of the probe is not within the adequate range, the gain across
different frequencies will not be uniform. Consequently, a correct waveform cannot be
input to the measurement circuit of the TA120F. The input capacity of each probe is
not necessarily all the same. Therefore, the probe has a variable capacitor (trimmer)
that allows the input capacity to be adjusted. This adjustment is called phase
correction.
When using the probe for the first time, make sure to perform phase correction. The
appropriate input capacity varies depending on the input connector of the instrument.
Therefore, phase correction must also be performed when the connected instrument
is changed.

two periods of the waveform can be viewed in its entirety. For the procedure,
see the DL1740 User’s Manual.

the variable capacitor to make the displayed waveform on the waveform monitor
a correct rectangular wave (see explanation).

Compensation signal

Waveform type Rectangular wave
Frequency Approx. 1 kHz
Voltage Approx. 1 V

P-P

Differences in the waveform due to the phase correction of the probe

Correct waveform

Over compensated
(the gain in the high
frequency region is up)

Under compensated
(the gain in the high
frequency region is low)

3-10

IM 704430-01E

3.7 Setting the Numeric Value

Keys

Lights when the numerical values are shown on the display.

A numerical value appears.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

You can set numeric values (setup values) when the SET indicator is ON.

1. Check that the SET indicator is ON.

2. Check that a numeric value is shown on the display.

3. Press the arrow (< or >) keys to select the digit you wish to change. The value

at the selected digit blinks.

4. Turn the rotary knob to set the value within the range of each item. As the

value of the selected digit is increased, the next higher digit is also increased at
appropriate times. In contrast, as the value of the selected digit is decreased,
the next lower digit is also decreased at appropriate times.

3

Measurement Preparation and Common Operations

Explanation

IM 704430-01E

You can set the numeric value within the range of each item. You can confirm that the
TA120F is ready to accept numeric values when the SET indicator is ON and a single
digit of the numeric value on the display is blinking.

Note

You can reset the specified numeric value to the initial value (factory default setting). For
details, see section 7.4.

3-11

Chapter 4 Setting Measurement Conditions

4.1 Setting the Measurement Function

«For a functional description, see section 1.3.»

Keys

Lights when the numeric values are shown on the display.

Displays the ×N speed value when manually
setting the ×N speed.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

PRESET

10

20

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Setting the measurement function to 3T jitter

1. Press FUNC to select 3TCD ×1 or 3TCD ×N. The indicator of the selected item

lights.
If you selected 3TCD ×1, proceed to step 4.
If you selected 3TCD ×N, proceed to step 2.

• Manually setting the ×N speed

2. When the measurement function is set to 3TCD ×N, press SHIFT+FUNC

(SPEED). The 3TCD ×N indicator blinks and the ×N speed value is shown on

the display.

3. Use the rotary knob and arrow (< or >) keys to set the ×N speed value.

For the procedure to set numeric values, see section 3.7.

4

Setting Measurement Conditions

IM 704430-01E

• Selecting the polarity of the data signal

4. Press DATA to select or . The indicator of the selected item lights.

Setting the measurement function to D-to-C jitter

1. Press FUNC to select DtoC DVD. The DtoC DVD indicator lights.

• Selecting the slope of the data signal

2. Press DATA to select

, , or both and . The indicator of the

selected item lights.

• Selecting the slope of the clock signal

3. Press CLOCK to select

or . The indicator of the selected item lights.

4-1

4.1 Setting the Measurement Function

Explanation

There are two measurement functions: 3T jitter and D-to-C jitter. You must specify the
conditions of the signal to be measured for each measurement function.

Selecting 3T jitter

The measurement range of 3T jitter is 2.5T to 3.5T (T = 231.385 ns/N, where N is the
×N speed value). The following table shows the measurement range when N is 1, 2,
4, 8, and 10:

N Measurement Range (Unit: ns)

1 578.462 to 809.847
2 289.231 to 404.923
4 144.615 to 202.461
8 72.307 to 101.230
10 57.846 to 80.984

* Truncate values below the one-thousandths place.

• 3TCD ×1, 3TCD ×N

Select one of these values when measuring the pulse width of the 3T data signal of
a CD to determine the 3T jitter. 3TCD ×1, and 3TCD ×N are used to measure the
pulse width of single-speed, and ×N speed drives, respectively. For details on “N,”
see “Manual setting of ×N speed” below.

• Manual setting of ×N speed

Specify the ×N speed value N when measuring the pulse width for speeds other
than 3TCD ×1. When the value can be specified, the SET indicator lights and the
×N speed value N is shown on the display.

• Range: 1.0 to 10.0

• Resolution: 0.1

• Selecting the polarity of the data signal

•

: Measures the positive side (from the rising slope to the next falling slope) of

the pulse width.

• : Measures the negative side (from the falling slope to the next rising slope)
of the pulse width.

Selecting D-to-C jitter

The measurement range of D-to-C jitter is –5 ns to T + 5 ns (where T is the period of
the measured clock signal).

• DtoC DVD

Select this measurement function when measuring the time difference between the
data signal and the clock signal of a DVD to determine the D-to-C jitter.

• Selecting the slope of the data signal

•

: The rising slope becomes the measurement starting point of the time

difference.

•

: The falling slope becomes the measurement starting point of the time

difference.

• Both

and : The rising and falling slopes alternately become

measurement starting points of the time difference.

4-2

IM 704430-01E

4.1 Setting the Measurement Function

• Selecting the slope of the clock signal

There are two clock signals: the clock signal that is applied to the clock input
connector and the clock signal that is regenerated by the PLL circuit. This setting
is valid for the clock signal that is applied to the clock input connector. When using
the clock signal that is regenerated by the PLL circuit, this setting is made invalid,
and the rising slope is always used. For the procedure when using the
regenerated clock signal, see section 4.7.

•

: Measures the time difference between the measurement starting point of

the time difference and the first rising slope of the clock signal.

•

: Measures the time difference between the measurement starting point of

the time difference and the first falling slope of the clock signal.

Selecting BI-PHASE jitter

For an explanation of BI-PHASE jitter, see the TA120F Digital Jitter Meter Optional
Function User’s Manual (IM704430-51E).

Note

• If you select 3TCD ×N with FUNC and set the ×N speed setting to 6.2, you can measure the

pulse width of a single-speed ×1 DVD using the 3T jitter measurement function.

• The TA120F retains setup information of the measurement conditions for each measurement
function (3TCD ×1, 3TCD ×N, DtoC). However, the setup items that are common on the
TA120F such as the ON/OFF condition of the numeric display (see section 5.2), the ON/OFF
condition of key lock (see section 7.6), and GP-IB address (see section 8.4) are the same.

• The frequency range of the input clock signal that can be measured is from 25 MHz to 60
MHz.

4

Setting Measurement Conditions

IM 704430-01E

4-3

4.2 Setting the Equalizer

Keys

Lights when the numeric values are shown on the display.

When setting the boost amount,
the boost value is displayed.

«For a functional description, see section 1.4.»

Procedure

Explanation

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

20

PRESET

10

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Turning ON the equalizer

Press SHIFT+DATA (EQLZ). The EQLZ indicator lights and the equalizer turns ON.

Turning OFF the equalizer

Press SHIFT+DATA (EQLZ) when the equalizer is ON. The EQLZ indicator turns
OFF and the equalizer turns OFF.

Setting the boost amount of the equalizer

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Turn the rotary knob to select EqbSt.

3. Press >. The boost amount of the equalizer is displayed.

4. Use the rotary knob and arrow (< or >) keys to set the boost amount.

For the procedure to set numeric values, see section 3.7.
Measurement is resumed if you press MEAS while or after setting the boost amount.

When the equalizer is turned ON, you can equalize (compensate) the signal amplitude of
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 RF
input connector through the equalizer, we 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). By equalizing the RF signal, you can make more
accurate measurements.

4-4

Setting the boost (amplification) amount of the equalizer

• Selectable range: 2.0 dB to 6.0 dB

• Resolution: 0.1 dB

Note

• The frequency characteristics of the equalizer built into the TA120F comply with the
characteristics of the single-speed DVD specification (JIS X 6241 : 1997).

• When the equalizer is turned ON, the AGC circuit (see block diagram in section 1.1) is
automatically turned ON and outputs a signal of a constant amplitude regardless of the
amplitude of the input signal.

IM 704430-01E

4.3 Setting the Trigger Mode and Slice Level

«For a functional description, see section 1.4.»

Keys

Lights when the numeric values are shown on the display.

When setting the slice level,
the slice level value is displayed.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting the trigger mode

1. Press TRIG to select AUTO, MAN, or both AUTO and MAN. The indicator of

the selected item lights.
If you selected MAN or both AUTO and MAN, proceed to step 2.

Setting the slice level

2. When the trigger mode is set to MAN or both AUTO and MAN, press

SHIFT+TRIG (LEVEL). The indicator of the selected trigger mode blinks and
the slice level is shown on the display.

3. Use the rotary knob and arrow (< or >) keys to set the slice level.

For the procedure to set numeric values, see section 3.7.

4

Setting Measurement Conditions

IM 704430-01E

4-5

4.3 Setting the Trigger Mode and Slice Level

Explanation

When measuring the pulse width or time 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. The trigger is activated
when the signal passes through the center value of the amplitude of the data signal that
has been binarized using the slice level.

Setting the trigger mode and slice level

• AUTO (auto mode)

The RF signal is binarized using the slice level that is detected by the auto slice
circuit. For information about the auto slice function, see section 1.4.

• MAN (manual mode)

You can set the slice level in the range shown below. The RF signal is binarized
using the specified slice level. When the value can be specified, the SET indicator
lights and the slice level is shown on the display.

• Range: –5.000 V to 5.000 V (–1.000 V to 1.000 V when the equalizer is ON)

• Resolution: 1 mV

• AUTO and MAN (auto + manual mode)

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

• Range: –1.000 V to 1.000 V

• Resolution: 0.001

Note

• If the equalizer is OFF and the slice level of the manual mode exceeds 1 V (or falls below –1
V) and you turn ON the equalizer, the slice level is set to 1 V (or –1 V).

• When the trigger mode is set to auto or auto + manual, the AGC circuit (see block diagram in
section 1.1) is automatically turned ON and outputs a signal of a constant amplitude
regardless of the amplitude of the input signal.

4-6

IM 704430-01E

4.4 Setting the Gate

Keys

Lights when the numeric values are shown on the display.

«For a functional description, see section 1.4.»

When manually setting the gate time,
the gate time is displayed.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting the gate

1. Press GATE to select 105, 0.1s, 0.5s, or MAN. The indicator of the selected

item lights. Event gate is activated when 10

5

is selected; time gate is activated
when 0.1s, 0.5s, or MAN is selected.
If you selected MAN, proceed to step 2.

Manually setting the gate time

2. When the gate is set to MAN, press SHIFT+GATE (GATE TIME). The MAN

indicator blinks and the gate time is shown on the display.

3. Use the rotary knob and arrow (< or >) keys to set the gate time.

For the procedure to set numeric values, see section 3.7.

4

Setting Measurement Conditions

IM 704430-01E

4-7

4.4 Setting the Gate

Explanation

You can set the number of measured values (number of events) of the pulse width or
time difference to be stored in the acquisition memory or the period (gate time) over
which the measured values are stored in the acquisition memory.

Selecting the gate

5

• 10

(event gate)

5

10

measured values are stored in the acquisition memory. Of those values, the
measured values that are in the measurement range determined by the
measurement function are used to derive the measurement result (jitter). You
cannot change the number of events.

• 0.1 s, 0.5 s, and MAN (time gate)

0.1s and 0.5s correspond to gate times of 0.1 s and 0.5 s, respectively. MAN
allows measurement over the manually specified gate time. For details on “MAN,”
see “Manual setting of the gate time” below.

Manual setting of the gate time

When making measurements using a gate time other than 0.1s or 0.5s, set the gate
time in the range shown below. When the value can be specified, the SET indicator
lights and the gate time is shown on the display.

• Range: 1.0 ms to 1000.0 ms

• Resolution: 0.1 ms

Note

If you set the gate time between 100.1 ms and 1000.0 ms, the measured values are acquired
in units of 100 ms. The measured values are acquired so that the sum of the gate times in
units of 100 ms add up to the specified gate time and determines the jitter (statistical value).
The calculated value is displayed or output as a DC level signal (see section 7.1). The
portion that is less than 100 ms is processed as shown in the following figure. Meter
indication, numeric display, and DC output are updated as shown below.

4-8

Example in which the gate time is set to 250 ms

100 ms 100 ms 100 ms 100 ms 100 ms 100 ms

RF
signal

Meter indication,
DC output

100 ms 100 ms 100 ms 100 ms 100 ms 100 ms

RF
signal

Numeric display

50 ms

50 ms

50 ms

50 ms

50 ms

50 ms

IM 704430-01E

4.5 Setting the Arming

Keys

Lights when the numeric values are shown on the display.

When setting the arming delay,
the delay time is displayed.

«For a functional description, see section 1.4.»

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting auto arming (internal arming)

Press ARM to turn OFF both the and indicators.

Setting the external arming

• Selecting the slope

1. Press ARM to select

or . The indicator of the selected item lights.

• Setting the arming delay

2. When arming is set to external arming (when the slope is set to

press SHIFT+ARM (DELAY). The indicator of the selected slope blinks and the
arming delay time is shown on the display.

3. Use the rotary knob and arrow (< or >) keys to set the delay time.

For the procedure to set numeric values, see section 3.7.

4

Setting Measurement Conditions

or ),

IM 704430-01E

4-9

4.5 Setting the Arming

Explanation

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 time difference of each pulse,
arming refers to the starting point of the measurement of a set of pulse widths or time
differences used to derive the jitter.

Selecting auto arming (internal arming)

If you turn OFF both the

and indicators, auto arming is activated. The internal
signal of the TA120F is the arming source. Arming is the cue used to start the first
measurement (the first trigger).

Setting external arming

Arming is activated when an external signal (arming source) is applied to the external
arming input connector.

• Selecting the slope

•

: Arming is activated on the rising slope of the external arming signal.

• : Arming is activated on the falling slope of the external arming signal.

• Setting the arming delay

When using external arming, set the delay time of arming in the range shown
below. When the value can be specified, the SET indicator lights and the delay
time is shown on the display.

• Range: 0.0 ms to 1000.0 ms

• Resolution: 0.1 ms

• External arming signal

Input the external arming signal to the connector indicated as “EXT ARM IN” on the
rear panel.

Item Specifications

Input impedance 10 kΩ (typical value*)
Input coupling DC
Input level TTL level
Allowable input voltage range –8 V to 13 V (DC+ACpeak)
Minimum input pulse width 30 ns
Setup time 0 ns (possible even when the external arming and data

* The typical value is a representative or standard value. It is not a warranted value.

signal are simultaneous)

4-10

IM 704430-01E

EXT ARM

IN

(TTL)

(External arming
input connector)

External arming input circuit

+5 V

510 Ω

74LS14
or equivalent

10 kΩ

4.5 Setting the Arming

CAUTION

Do not apply a voltage that exceeds the allowable input voltage range to the
external arming input connector. This may cause damage to the TA120F.

4

Setting Measurement Conditions

IM 704430-01E

4-11

4.6 Setting Inhibit

Keys

MEAS

KEY

σσ

LOCK

Procedure

Turning ON inhibit and selecting the polarity

Press INH to select
turned ON.

Turning OFF inhibit

Press INH to turn OFF both the

SETAVE/T

2

4

0

«For a functional description, see section 1.4.»

msns

us

4

6

12

8

180

%

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

or . The indicator of the selected item lights and inhibit is

and indicators. Inhibit is turned OFF.

Explanation

You can inhibit measurements by applying an external signal (inhibit signal) to the
INHIBIT input connector. This is possible even while the gate is open or during
measurement after arming activation.

Selecting the polarity

•

: Inhibits measurements while a positive signal is being input.

•

: Inhibits measurements while a negative signal is being input.

Inhibit signal

Input the inhibit signal to the connector indicated as “INHIBIT” on the rear panel.

Item Specifications

Input impedance 10 kΩ (typical value*)
Input coupling DC
Input level TTL level
Allowable input voltage range –8 V to 13 V (DC+ACpeak)
Minimum input pulse width 30 ns
Setup time 0 ns (possible even when the inhibit signal and data signal

* The typical value is a representative or standard value. It is not a warranted value.

are simultaneous)

4-12

IM 704430-01E

INHIBIT

IN

(TTL)

(Inhibit input
connector)

Inhibit input circuit

74LS14
or equivalent

4.6 Setting Inhibit

+5 V

510 Ω

10 kΩ

CAUTION

Do not apply a voltage that exceeds the allowable input voltage range to the
inhibit input connector. This may cause damage to the TA120F.

4

Setting Measurement Conditions

IM 704430-01E

4-13

4.7 Switching the Clock Signal (Applicable to D-to­C Jitter Measurements)

«For a functional description, see section 1.4.»

Keys

msns

us

8

16

20

PRESET

10

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

When the measurement function is set to DtoC DVD (D-to-C jitter), you can use the
regenerated clock signal.

Using the regenerated clock signal

Press SHIFT+CLOCK (PLL). The PLL indicator lights and the PLL circuit turns ON.
The D-to-C jitter measurements can now be carried out using the regenerated clock
signal.

Explanation

Using the clock signal that is applied to the clock input connector

Press SHIFT+CLOCK (PLL) while the PLL circuit is ON. The PLL indicator turns
OFF, and the PLL circuit turns OFF. The D-to-C jitter measurements can now be
carried out using the clock signal that is applied to the clock input connector.

For the clock signal used to measure the D-to-C jitter, you can select either the clock
signal that is applied to the clock input connector or the clock signal that is regenerated
by the PLL circuit. To use the clock signal regenerated by the PLL circuit, you must turn
ON the PLL circuit operation according to the steps above. When the PLL circuit
operation is turned ON, the settings made in “Selecting the slope of the clock signal” in
section 4.1 are made invalid, and the rising slope is always used.

Note

• The clock signal regenerated by the PLL circuit is regenerated from the single-speed data
signal of a DVD. Therefore, the frequency range of the regenerated clock signal is
27 MHz±10%.

• If the clock cannot be regenerated using the PLL circuit (PLL unlock), the PLL indicator blinks,
the meter needle goes off the scales beyond the scale line that indicates the maximum value
of each scale, and the characters “unLoC” appear on the display. In addition, the DC output
(see section 7.1) is set to 5 V.

4-14

IM 704430-01E

4.8 Adjusting the Phase Difference between the Data Signal and the Clock Signal (Applicable to D-to-C Jitter Measurements)

«For a functional description, see section 1.4.»

Keys

Lights when the numeric values are shown on the display.

When adjusting the phase of the clock signal,
the adjusted value is displayed.

Procedure

MEAS

KEY

σ

σ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

PRESET

10

20

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

When the measurement function is set to DtoC DVD (D-to-C jitter), you can adjust the
phase difference of the clock signal.

1. Press PHASE. The PHASE indicator blinks, and the 10% and 20% indicators of

SCALE light. The phase difference (deg) between the data signal and the clock
signal is indicated on the analog meter.

2. Use the rotary knob and arrow (< or >) keys to set the phase adjustment value.

The meter needle changes according to the changes in the adjustment value.

For the procedure to set numeric values, see section 3.7.

4

Setting Measurement Conditions

Explanation

IM 704430-01E

Adjusting the phase difference

When using the clock signal that is applied to the clock input connector to make D-to­C jitter measurements, you can change the amount of delay of the clock signal using
the internal circuit and adjust the phase difference between the data signal and the
clock signal. This cannot be applied to the clock signal that is regenerated by the PLL
circuit.

• Range: 0.0 ns to 40.0 ns

• Resolution: 0.1 ns

Meter indication of the phase difference

The phase difference between the data signal and the clock signal can be indicated
on the analog meter in the range from 0 deg to 360 deg. The scale line is written
every 90 degrees. If you adjust the phase difference so that it is 180 (deg), the
measured values of the D-to-C is distributed around T/2 (T is the period of the clock
signal) resulting in a more accurate D-to-C jitter measurement.

Note

When the measurement function is set to DtoC DVD (D-to-C jitter) and the PLL circuit is
turned OFF, you can adjust the phase difference of the clock signal.

4-15

Chapter 5 Displaying the Measured Results

5.1 Using the Analog Meter

Keys

Lights when measured results are shown on the display.

MEAS

KEY

σσ

LOCK

Procedure

Indicating the jitter ratio on the analog meter

When the TA120F is turned ON, the meter needle indicates the measured jitter ratio.

SETAVE/T

4

2

4

6

12

8

180

%

0

«For a functional description, see section 1.5.»

msns

us

8

16

PRESET

10

20

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

5

Displaying the Measured Results

Explanation

Selecting the scale

Press SCALE to select 10% or 20%. The needle moves according to the selected
scale.

Jitter ratio indication on the meter

The TA120F continuously makes measurements when the power is turned ON. The
meter needle indicates the jitter ratio (σ/T) of the measurement function that was
selected in section 4.1.

* T is the period of the clock signal of the CD or DVD. When the measurement function is

3T jitter, T = 231.385/N (where N is the ×N speed value). When the measurement
function is D-to-C jitter, T is the period of the clock signal that is applied to the clock input
connector or regenerated by the PLL circuit.

Selecting the scale

You can select the scale that is used when indicating the measured jitter ratio on the
analog meter.

• 10%
The scale line is written every 0.2%. The needle is capable of indicating a jitter
ratio of up to 11%.

• 20%
The scale line is written every 0.5%. The needle is capable of indicating a jitter
ratio of up to 22%.

Note

• The phase difference between the data signal and the clock signal can be indicated on the
analog meter in the range from 0 deg to 360 deg. The scale line is written every 90 degrees.
For a description on how to use the analog meter when it is indicating the phase difference,
see section 4.8.

• The minimum interval for measuring jitter on the TA120F is 50 ms. In some cases, the
analog meter may not be able to keep up with the changes in the measured value.

• If the jitter ratio exceeds the maximum value of each scale, the meter needle goes off the
scale beyond the scale line that indicates the maximum value of each scale.

• If the trigger is not activated on the input signal and measurements cannot be made, the meter
needle goes off the scale beyond the scale line that indicates the maximum value of each scale.

• If the PLL circuit is turned ON during D-to-C measurement and the clock cannot be
regenerated using the PLL circuit (PLL unlock), the PLL indicator blinks and the meter needle
goes off the scale beyond the scale line that indicates the maximum value of each scale. In
addition, the DC output (see section 7.1) is set to 5 V.

5-1IM 704430-01E

5.2 Displaying the Numeric Value and Turning OFF the Numeric Display

«For a functional description, see section 1.5.»

Keys

Lights when the numeric values are shown on the display.

The measured results are displayed using numeric values.

The indicator of the selected unit lights.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

20

PRESET

10

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Displaying the jitter or jitter ratio using numeric values

Press MEAS to select the measured parameter, σ/T or σ. The indicators for the
selected parameter and its unit light.
When σ and ns light, the jitter is displayed using numeric values.
When σ/T and % light, the jitter ratio is displayed using numeric values.

Displaying the average of the measured values

Press MEAS to select AVE for the measured parameter. The AVE indicator lights.
The average of the measured values is displayed using numeric values.

5-2

Turning OFF the numeric display

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Turn the rotary knob until the characters diSP are displayed.

3. Press >. The display shows the characters on.

4. Turn the rotary knob to select oFF.

5. Press MEAS to turn OFF the numeric display of measured values. The

characters d-OFF are shown on the display.

Turning ON the numeric display

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Turn the rotary knob until the characters diSP are displayed.

3. Press >. The display shows the characters oFF.

4. Turn the rotary knob to select on.

5. Press MEAS to display the measured values using numeric values.

IM 704430-01E

Explanation

5.2 Displaying the Numeric Value and Turning OFF the Numeric Display

Numeric display of jitter, jitter ratio and average value

The TA120F continuously makes measurements when the power is turned ON. The
jitter ratio (σ/T

*1

), jitter (σ), and average value*2 of the measurement function that was

selected in section 4.1 is displayed using numeric values.

*1 T is the period of the clock signal of the CD or DVD. When the measurement function is

3T jitter, T = 231.385/N (where N is the ×N value). When the measurement function is D­to-C jitter, T is the period of the clock signal that is applied to the clock input connector or
regenerated by the PLL circuit.

*2 The average value is the average of the time measurement.

When the measurement function is set to 3T jitter: Average of the pulse width of the
measured 3T signal
When the measurement function is D-to-C jitter: Time difference average between the
data signal and clock signal

• When σ and ns light, the jitter is displayed using numeric values.

• When σ/T and % light, the jitter ratio is displayed using numeric values.

• When AVE and ns light, the average of the measured values is displayed using

numeric values.

Turning ON/OFF the numeric display

If the changes in the numeric display of the jitter or jitter ratio bother you, you can
display the characters “d-oFF” instead of displaying the values.

5

Displaying the Measured Results

Note

• Even when the numeric display is turned OFF, the display shows the setup values when
setting the TA120F. For the setup procedure, see chapter 4. Error codes and version
information are also shown on the display even when the numeric display is turned OFF.

• If the value to be displayed using numeric values cannot be obtained, the display shows
“- - - - -” (bar).

• If the PLL circuit is turned ON during D-to-C measurement and the clock cannot be

regenerated using the PLL circuit (PLL unlock), the PLL indicator blinks, and the characters

“unLoC” are shown on the display. In addition, the DC output (see section 7.1) is set to 5 V.

• If numeric display is shown when the average coefficient (see section 7.1) or the jitter ratio

correction coefficient (see section 7.1) of the DC output filter is some value other than the
initial value, the σ/T (when displaying the jitter ratio) or σ (when displaying the jitter)
measurement indicator blinks.

• If the average value is shown when the average coefficient (see section 7.1) of the DC output
filter is some value other than the initial value, the AVE measurement indicator blinks.

5-3IM 704430-01E

Chapter 6 Storing and Recalling Setup Information

6.1 Storing the Setup Information

Keys

Lights when a preset number is shown on the display.

The preset number is displayed when setting
to store the setup information.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

PRESET

10

20

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting the preset number

1. Press SHIFT+SCALE(PRESET). The display shows the characters PrStx. The

preset number you selected previously is shown in x

2. Turn the rotary knob to select the preset number for storing the setup

information.

Storing the setup information

3. Press >. The characters StorE are displayed for approximately a second, and

the setup information is stored. When the setup information is stored,
measurement is resumed.

6

Storing and Recalling Setup Information

Explanation

Setup information that is stored

The following setup information is stored to the memory.
All settings such as the measurement function, gate, arming, inhibit, input, and
displayed unit excluding the GP-IB address.

Number of sets for storing presets

The number of sets that can be stored (preset number) is seven from 0 to 6.

Note

If you initialize all setup information of the TA120F to factory default settings (see section 7.4),
the stored setup information is also initialized. The setup information of all seven sets is reset
to factory default settings.

6-1IM 704430-01E

6.2 Recalling the Setup Information

Keys

Lights when a preset number is shown on the display.

The preset number is displayed when setting
to recall the setup information.

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

2

PRESET

10

0

g

e

d

PHASE

10 20

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting the preset number

1. Press SHIFT+SCALE(PRESET). The display shows the characters PrStx. The

preset number you selected previously is shown in x

2. Turn the rotary knob to select the preset number for recalling the setup

information.

Recalling the setup information

3. Press <. The characters rECAL are displayed for approximately a second, and

the setup information is recalled. Then, the measurement is started using the
recalled setup information.

Explanation

6-2

Setup information that is recalled

The setup information that is stored at the specified preset number is recalled, and the
current settings are replaced with this information. If no setup information is stored at
the specified preset number, the factory default settings are recalled.

Number of sets for recalling presets

The number of sets that can be recalled (preset number) is seven from 0 to 6.

IM 704430-01E

Chapter 7 Outputting Signals, Initializing Setup Information, and Setting Key Lock

7.1 Setting the DC Output

«For a functional description, see section 1.6.»

Connecting the Cable

Connect a BNC cable to the jitter DC output connector on the rear panel of the TA120F.

Keys

Lights when the numeric values are shown on the display.

When setting the DC output mode, DC output
range of the jitter ratio, determination level,
and average coefficient, characters or values
indicating the settings are displayed.

Procedure

MEAS

KEY

σ

σ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

20

10 20

PRESET

e

d

10

g

PHASE

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Selecting the DC output mode

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Turn the rotary knob to select dcout.

3. Press >. Turn the rotary knob to select Jitt or JudGE. If you select Jitt (jitter

ratio output), a DC voltage corresponding to the jitter ratio is output from the
jitter DC output connector. If you select JudGE (determination output), a DC
voltage of 5 V is output when the jitter ratio is below the determination level and
0 V when the jitter is above the determination level from the jitter DC output
connector.

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

IM 704430-01E

Setting the jitter ratio output range

• Setting the upper limit of the jitter ratio output range

4. Press SHIFT+<(UTILITY). The display shows the characters init.

5. Turn the rotary knob to select dc hi.

6. Press >. The display shows the upper limit of the jitter ratio output range.

7. Use the rotary knob and arrow (< or >) keys to set the upper limit.

For the procedure to set numeric values, see section 3.7.

• Setting the lower limit of the jitter ratio output range

8. Press SHIFT+<(UTILITY). The display shows the characters init.

9. Turn the rotary knob to select dc Lo.

10. Press >. The display shows the lower limit of the jitter ratio output range.

11. Use the rotary knob and arrow (< or >) keys to set the lower limit.

For the procedure to set numeric values, see section 3.7.

7-1

7.1 Setting the DC Output

Setting the determination level

12. Press SHIFT+<(UTILITY). The display shows the characters init.

13. Turn the rotary knob to select dcJdG.

14. Press >. The display shows the determination level.

15. Use the rotary knob and arrow (< or >) keys to set the determination level.

For the procedure to set numeric values, see section 3.7.

Setting the average coefficient of the DC output filter

16. Press SHIFT+<(UTILITY). The display shows the characters init.

17. Turn the rotary knob to select AVE.

18. Press >. The display shows the average coefficient of the DC output filter.

19. Use the rotary knob and arrow (< or >) keys to set the average coefficient.

For the procedure to set numeric values, see section 3.7.

Setting the jitter ratio correction coefficient α

20. Press SHIFT+<(UTILITY). The display shows the characters init.

21. Turn the rotary knob to select ALPHA.

22. Press >. The display shows the correction coefficient α.

23. Use the rotary knob and arrow (< or >) keys to set the jitter ratio correction

coefficient α.

For the procedure to set numeric values, see section 3.7.

Setting the jitter ratio correction coefficient β

24. Press SHIFT+<(UTILITY). The display shows the characters init.

25. Turn the rotary knob to select bEtA.

26. Press >. The display shows the correction coefficient β.

27. Use the rotary knob and arrow (< or >) keys to set the jitter ratio correction

coefficient β.

For the procedure to set numeric values, see section 3.7.

If you press MEAS in the middle or at the end of the setting operation, the information
that is specified up to that point is applied to the DC output setting and the measurement
operation resumes.

7-2

IM 704430-01E

Explanation

7.1 Setting the DC Output

Setup menu for DC output

The following parameters are specified for the DC output. Use SHIFT+<(UTILITY)
and the rotary knob to select the parameter you wish to set.

dcout: Selects the DC output mode
dc hi: Sets the upper limit of the jitter ratio output range
dc Lo: Sets the lower limit of the jitter ratio output range
dcJdG: Sets the determination level
AVE: Sets the average coefficient of the DC output filter
ALPHA: Sets the jitter ratio correction coefficient α
bEtA: Sets the jitter ratio correction coefficient β

Selecting the DC output mode

Selects whether to output the jitter ratio or the determination output from the jitter DC
output connector on the rear panel.

• Jitt (jitter ratio output)

The jitter ratio of the selected measurement function can be converted to DC
voltage (0 to 5 V) and output from the jitter DC output connector on the rear panel.
You can specify the jitter ratio that will output 5 V (upper limit) and the jitter ratio
that will output 0 V (lower limit), and output DC voltage that is proportional to the
jitter ratio. 5 V is output for calculated results that exceed 5 V. For setting the
upper and lower limits, see “Setting the jitter ratio output range” described later.

When the upper limit is set to 25% and the lower limit to 5%

5.0

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

Output

Voltage

(VDC)

0.0
5

Jitter Ratio (%)

25

For the update rate of the jitter ratio output, see the note in section 4.4, “Setting the
Gate.”

• JudGE (determination output)

You can judge the measured jitter ratio against a specified value (determination
level). If the jitter ratio is less than or equal to the determination level, a DC voltage
of 5 V is output from the jitter DC output connector. When the jitter ratio exceeds
the determination level, 0 V is output. For setting the determination level, see
“Setting the determination level” described later.

When the determination level is set to 5%

Determination

level

5%

5.0

Output voltage

(VDC)

0.0

Changes in the jitter ratio

Time

IM 704430-01E

7-3

7.1 Setting the DC Output

• DC output circuit

Item Specification

Output impedance 50 Ω (typical value*)
Output level 0 V to 5 VDC, given that the monitor equipment receives the signal at

* The typical value is a representative or standard value. It is not strictly guaranteed.

JITTER DC

OUT

(DC output
connector for jitter)

(0 to +5 V)

high impedance (approx. 1 MΩ).

DC output circuit for jitter

+5 V

50 Ω

–5 V

CAUTION

Do not apply external voltage to the output connector. This may cause damage
to the TA120F.

Setting the jitter ratio output range

You can set the upper and lower limits of the jitter ratio output range. The upper and
lower limits correspond to 5 VDC and 0 VDC, respectively.

• Range: 0.00% to 100.00%

• Resolution: 0.01%

Setting the determination level

You can set the determination level for the determination output.

• Range: 0.00% to 100.00%

• Resolution: 0.01%

Setting the average coefficient of the DC output filter

Takes the moving average of the jitter that has been measured. When the DC output
fluctuates due to instability in the measured jitter, this function suppresses the degree
of fluctuation. You can set the average coefficient (number of measured values to be
averaged) when performing moving average. The jitter ratio that is moving-averaged
using the DC output filter is applied to both the jitter ratio output and the determination
output. The measured value that is moving averaged is used for the numeric display,
meter indication, and DC output.
Range: 1 to 10

7-4

IM 704430-01E

7.1 Setting the DC Output

Setting the jitter ratio correction coefficient

This function corrects the measured jitter ratio using a linear equation. The jitter is the
value obtained by multiplying the corrected jitter ratio and the clock value (T). The
corrected jitter ratio is used for the numeric display, meter indication, and DC output.
Correction equation: Corrected jitter ratio (%) = correction coefficient α ×

measured jitter ratio (%) + correction coefficient β (%)

Jitter correction equation:Corrected jitter (ns) = correction coefficient α × measured

jitter (ns) + correction coefficient β (%) × T*

* T is the period of the clock signal of the CD or DVD. When the measurement function is 3T

jitter, T = 231.385/N (where N is the ×N value). When the measurement function is D-to-C
jitter, T is the period of the clock signal that is applied to the clock input connector or
regenerated by the PLL circuit.

• Selectable Range
Correction coefficient α: 0.0001 to 9.9999
Correction coefficient β: –9.999 to 9.999%

• Resolution
Correction coefficient α: 0.0001
Correction coefficient β: 0.001%

Note

• The upper limit must be greater than the lower limit when setting the jitter ratio output

range.

• If the average value is shown when the average coefficient of the DC output filter is some

value other than the initial value (see section 7.4), the AVE measurement indicator blinks.

• When the average coefficient or the jitter ratio correction coefficient is some value other

than the initial value (see section 7.4), the σ/T (when displaying the jitter ratio) or σ (when
displaying the jitter) measurement indicator blinks.

• The DC output is 5 V when the trigger is not activated for the input signal and

measurements cannot be made.

• If the TA120F becomes unlocked (see section 4.7), the DC output is set to 5 V.

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

IM 704430-01E

7-5

7.2 Outputting Other Signals

CAUTION

Do not apply external voltage to the output connector. This may cause damage
to the TA120F.

Connecting the Cable

Connect a BNC cable to the appropriate output connector on the rear panel of the
TA120F.

Monitor output of RF signals or monitor output of equalized RF signals

You can output the RF signal that is applied to the RF input connector directly to the
monitor output on the rear panel. If the equalizer is activated, the equalized RF signal
is output.

Item Specifications

Output impedance 50 Ω (typical value*)
Output level When the monitor equipment receives the signal at an input impedance

* The typical value is a representative or standard value. It is not a warranted value.

of 50 Ω, the output level is as follows:

• Approximately 1/4 the RF signal (within ±5 V) when the equalizer is
OFF and the trigger mode is set to manual.

• Approximately 0.4 Vp-p to 0.6 Vp-p (within ±1 V) when the equalizer
is ON or when the trigger mode is set to auto or auto + manual.

EQUALIZED RF/

MONITOR OUT

(Monitor
output connector)

(50 Ω)

Monitor output circuit

+5 V

50 Ω

–5 V

7-6

IM 704430-01E

7.2 Outputting Other Signals

Outputting the data signal

You can output the data signal obtained through the binarization of the RF signal from
the data signal output connector on the rear panel at TTL levels.

Item Specifications

Output impedance 50 Ω (typical value*)
Output level TTL level given that the monitor equipment receives the signal at high

impedance (approx. 1 MΩ).

* The typical value is a representative or standard value. It is not a warranted value.

Data signal output circuit

+5 V

SLICED RF

OUT

(Data signal
output connector)

(TTL)

50 Ω

–5 V

Outputting the clock signal

You can output the clock signal that is applied to the clock input connector from the
clock signal output connector on the rear panel at TTL levels. When the PLL circuit is
in operation, the clock signal regenerated by the PLL circuit is output.

Item Specifications

Output impedance 50 Ω (typical value*)
Output level TTL level given that the monitor equipment receives the signal at high

* The typical value is a representative or standard value. It is not a warranted value.

impedance (approx. 1 MΩ).

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

CLOCK

OUT

(Clock signal
output connector)

(TTL)

Clock signal output circuit

+5 V

50 Ω

–5 V

IM 704430-01E

7-7

7.3 Backing Up the Setup Information

The setup information listed below is stored using the lithium battery. When the power
switch is turned ON, the TA120F starts the measurement using the settings that existed
immediately before the power switch was turned OFF. If the setup information can no
longer be stored due to a dead lithium battery, the TA120F is reset to the factory default
settings. For factory default settings, see section 7.4.

Item

Measurement function

Measured item (3T jitter/D-to-C jitter)
Manual setting of the ×N speed (3T jitter)
Polarity of the data signal (3T jitter)
Slope of the data signal (D-to-C jitter)
Slope of the clock signal (D-to-C jitter)

Gate Type

Manual setting of the gate time

Arming type

Slope of the external arming signal
Arming delay setting

ON/OFF condition of inhibit

Polarity
ON/OFF condition of the equalizer
Boost amount of the equalizer
Trigger mode type

Slice level
ON/OFF condition of the PLL circuit
Phase difference adjustment value
Meter scale type
Numeric display type (jitter, jitter ratio, average value)

ON/OFF condition of the numeric display
DC output mode
Upper limit of the jitter ratio output range

Lower limit of the jitter ratio output range
Determination level
Average coefficient of the DC output filter
Jitter ratio correction coefficient α

JItter ratio correction coefficient β
GP-IB address

7-8

Note

The TA120F retains setup information of the measurement conditions for each measurement

function (×1, ×N, DtoC). However, the setup items that are common on the TA120F such as

the ON/OFF condition of the numeric display (see section 5.2), the ON/OFF condition of key

lock (see section 7.6), and GP-IB address (see section 8.4) are the same.

IM 704430-01E

7.4 Initializing the Setup Information

There are two methods of initializing the setup information.

Keys

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

Procedure

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

POWER

Note

• Check that it is okay to initialize the settings before actually initializing the settings. You
cannot set the settings back after initialization. We recommend that you transmit the
setup information to a PC using a communication command and save the information
beforehand.

• If you initialize the settings to factory default, the GP-IB address is also initialized.

ARM INH

REMOTE

CLOCK

SHIFT

PHASE

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

Initializing the settings to factory default

1. Check that the power switch is turned OFF.

2. While pressing MEAS, turn ON the power switch. Hold MEAS down for

approximately 3 s. The settings are initialized.

Initializing the current setup information (settings excluding the GP-IB address
and the setup information that is stored in the internal memory)

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Press >. The settings are initialized. When the initialization is finished, the

characters donE are displayed for approximately a second, and the
measurement is resumed.

IM 704430-01E

7-9

7.4 Initializing the Setup Information

Explanation

The following setup information can be initialized to the factory default settings.

Item Factory Default Settings

Measurement Function

Item under measurement D-to-C jitter
Manual setting of the ×N speed (3T jitter) 1.0
Polarity of the data signal (3T jitter) Positive
Slope of the data signal (D-to-C jitter) Rising slope
Slope of the clock signal (D-to-C jitter) Rising slope

Gate type 105

Manual setting of the gate time 1000.0 ms

Arming type Auto arming (internal arming)

Slope of the external arming signal Unselected
Arming delay setting 0.0 ms

ON/OFF condition of inhibit OFF

Polarity Unselected
ON/OFF condition of the equalizer OFF
Boost amount of the equalizer 3.2 dB
Trigger mode type Auto mode

Slice level 0.000 V
ON/OFF condition of the PLL circuit OFF
Phase difference adjustment value 0.0 ns
Meter scale type Jitter ratio

Scale 10% scale
Numeric display type (jitter, jitter ratio, or average value) Jitter ratio

ON/OFF condition of the numeric display ON
DC output mode Jitt
Upper limit of the jitter ratio output range 25.00%

Lower limit of the jitter ratio output range 0.00%
Determination level 12.50%
Average coefficient of the DC output filter 1
Jitter ratio correction coefficient α 1.0000

Jitter ratio correction coefficient β 0.000

7-10

For the following setup information, the initialized information varies depending on the
initialization method.

Item Initialization to Factory Initialization of the Current

Default Settings Setup Information

Setup information stored All the setup information (preset The stored setup information
to the internal memory numbers 0 through 6) are initialized is not initialized.

to factory default settings.

GP-IB address 1 The GP-IB address is not

initialized.

Note

The communication command “*RST” initializes the current setup information.

IM 704430-01E

7.5 Displaying the Version Information

Keys

Lights when the version number is shown on the display.

Displays the version number when
displaying the version information.

MEAS

KEY

σσ

LOCK

SETAVE/T

4

2

4

6

12

8

180

%

0

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

1. Press SHIFT+<(UTILITY). The display shows the characters init.

2. Turn the rotary knob to select F-VEr.

3. Press >. The firmware version (ROM version) is displayed.

4. Press MEAS to terminate displaying the version information and resume the

measurement.

7

Outputting Signals, Initializing Setup Information, and Setting Key Lock

IM 704430-01E

7-11

7.6 Key Lock

Keys

Procedure

Turning ON the key lock

Slide the KEY LOCK switch on the rear panel downward (in the direction of the
arrow). The key lock turns ON and the KEY LOCK indicator on the front panel lights.
From this point, all key operations except the power switch and the KEY LOCK switch
are disabled.

Turning OFF (releasing) the key lock

Slide the KEY LOCK switch on the rear panel upward (in the opposite direction of the
arrow). The key lock turns OFF and the KEY LOCK indicator on the front panel turns
OFF. All key operations are enabled.

KEY

LOCK

Explanation

You can disable (key lock) the front panel key operation. However, the following switch
and key operations are enabled even during key lock:

• Turning ON/OFF the power switch

• Turning ON/OFF the KEY LOCK switch

Note

• Key lock can be enabled even when the TA120F is in the remote mode through the

communication function.

• Operations in the maintenance mode (see sections 9.4 to 9.6) are available even when key

lock is ON.

7-12

IM 704430-01E

Chapter 8 Communication Function

8.1 About the IEEE.488.2-1992 Standard

The GP-IB interface of the instrument conforms to the
IEEE 488.2-1992 Standard. This standard specifies
that the 23 points listed below be stated in the
document. This section will describe these points.

(1) The subsets of the IEEE 488.1 interface

functions that are supported

See “GP-IB Interface Specifications” on page 8-

3.

(2) The operation of the device when it is

assigned an address outside the 0 to 30
range

The address of this instrument cannot be set to
an address outside the 0 to 30 range.

(3) Reaction of the device when the user

changes the address

The address is changed when a new address is
set using SHIFT+LOCAL. The new address is
valid until the next time it is changed.

(4) Device settings at power-up. The commands

that can be used at power-up.

Basically, the previous settings are used
(settings that existed when the power was turned
OFF).
All commands can be used at power-up.

(5) Message exchange options

(a)Input buffer size

1024 bytes

(b) Queries that return multiple response

messages

See the example of the commands given in
section 8.7.

(c)Queries that create response data when

the command syntax is being analyzed

All queries create response data when the
command syntax is analyzed.

(d) Queries that create response data during

reception

There are no queries in which the response
data are created upon receiving a send
request from the controller.

(e)Commands that have parameters that

restrict one another

See the example of the commands given in
section 8.7.

(6) Items that are included in the functional or

composite header elements constituting a
command

See sections 8.6 and 8.7.

(7) Buffer sizes that affect block data

transmission

The buffer size of block data is 64 KB.

(8) A list of program data elements that can be

used in equations and their nesting
limitations

Equations cannot be used.

(9) Syntax of the responses to queries

See the example of the commands given in
section 8.7.

(10) Communication between devices that do not

follow the response syntax

Not supported.

(11) Size of the response data block

0 to 524284 bytes.

(12) A list of supported common commands

See section 8.7.17, “Common Command Group.”

(13) Device condition after a successful

calibration

The settings return to the conditions that existed
before the calibration, measurements are
terminated, and previous measured data are
invalidated.

(14) The maximum length of block data that can

be used for the *DDT trigger macro definition

Not supported.

(15) The maximum length of the macro label for

defining macros, the maximum length of
block data that can be used for the macro
definition, and the process when recursion is
used in macro definitions

Macro functions are not supported.

(16) Reply to the *IDN? query

See section 8.7.17, “Common Command Group.”

8

Communication Function

IM 704430-01E

8-1

8.1 About the IEEE.488.2-1992 Standard

(17) The size of the storage area for protected

user data for *PUD and *PUD? commands

*PUD and *PUD? are not supported.

(18) The length of the *RDT and *RDT? resource

names

*RDT and *RDT? are not supported.

(19) The change in the status due to *RST, *LRN?,

*RCL, and *SAV

*RST

See section 8.7.17, “Common Command Group.”

*LRN?, *RCL, *SAV

These common commands are not supported.

(20) The extent of the self-test using the *TST?

command

The self-test consists of the same tests that are
performed at power-up.

(21) The structure of the extended return status

See section 8.8.

(22) Whether each command is processed in an

overlap fashion or sequentially

See section 8.6.6, “Synchronization with the
Controller” and section 8.7.

(23) The description of the execution of each

command

See the functions and procedures in chapters 1
to 9.

8-2

IM 704430-01E

8.2 GP-IB Interface Functions and Specifications

GP-IB Interface Functions

Listener function

• All of the settings that you can enter with the
panel keys can be set through the GP-IB
interface except for turning ON/OFF the power
and setting the communication parameters.

• Receives commands from a controller requesting
the output of setup information, measured data,
and other information.

• Also receives status report commands.

Talker function

Outputs setup information, measured data, and
other information.

Note

Talk-only, listen-only, and controller functions are not available
on this instrument.

Switching between Remote and Local
Modes

When switching from local to remote mode

Receiving a REN (Remote Enable) message from
the controller when the instrument is in the local
mode causes the instrument to switch to the remote
mode.

• The REMOTE indicator turns ON (see page 2-1).

• All keys other than LOCAL are locked.

• The settings that existed in the local mode are

maintained even when the instrument switches to
the remote mode.

When switching from remote to local mode

Pressing LOCAL when the instrument is in the
remote mode causes the instrument to switch to the
local mode. However, this act is invalid if the
instrument has been set to Local Lockout mode
(see next page) by the controller.

• The REMOTE indicator turns OFF.

• Key operations are enabled.

• The settings that existed in the remote mode are

maintained even when the instrument switches to
the local mode.

GP-IB Interface Specifications

• Electrical and mechanical specifications

Conforms to IEEE St’d 488-1978

• Functional specifications

See the table below

• Code

ISO (ASCII) code

• Mode

Addressable mode

• Address setting

The address can be set in the range from 0 to 30

using the GP-IB address setting that is displayed
with SHIFT+LOCAL.

• Clear remote mode

Remote mode can be cleared by pressing LOCAL

except when the instrument has been set to Local
Lockout mode by the controller.

Function Subset Name Description

Source handshaking SH1 Full source

handshaking capability

Acceptor handshaking AH1 Full acceptor

handshaking capability

Talker T6 Basic talker capability,

serial polling, untalk on

MLA (My Listen
Address), and no talk-

only capability

Listener L4 Basic listener capability,

unlisten on MTA (My
Talk Address), and
no listen-only capability.

Service request SR1 Full service request

capability

Remote local RL1 Full remote/local

capability

Parallel polling PP0 No parallel polling

capability

Clear device DC1 Full device clear

capability

Device trigger DT1 Full device trigger

capability
Controller C0 No controller functions
Electrical characteristics E1 Open collector

8

Communication Function

IM 704430-01E

8-3

8.3 Connecting the GP-IB Cable

GP-IB Cable

The GP-IB connector used on this instrument is a 24­pin connector that conforms to the IEEE St’d 488.1-

1978. Use a GP-IB cable that conforms to this
standard.

Connection Procedure

Connect the cable as shown below.

GP-IB connector

GP-IB cable

Precautions to Be Taken When
Connecting the Cable

• Firmly tighten the screws on the GP-IB cable
connector.

• Multiple devices can be connected to a single GP-IB
system. However, no more than 15 devices
(including the controller) can be connected to a
single system.

• When connecting multiple devices, each device
must have its own unique address.

• Use a cable of length 2 m or less for connecting the
devices.

• Make sure the total cable length does not exceed 20
m.

• When communicating, have at least two-thirds of
the devices turned ON.

• When connecting multiple devices, connect them in
a star or linear configuration (see the diagram
below). Loop and parallel configurations are not
allowed.

8-4

IM 704430-01E

8.4 Setting the Address

Keys

Lights when the numerical values are shown on the display.

When setting the GP-IB address,
the GP-IB address is displayed.

MEAS

KEY

σ

σ

LOCK

Procedure

1. Press SHIFT+LOCAL(GP-IB). The GP-IB address is shown on the display.

2. Use the rotary knob and arrow (< or >) keys to set the GP-IB address.

SETAVE/T

4

2

4

6

12

8

180

%

0

For the procedure to set numeric values, see section 3.7.

msns

us

8

16

10

20

g

e

d

PHASE

10 20

PRESET

SCALE

MEAS

%

UTILITY OPTION

BI-PHASE

MAN

xN

3TCD

0.5s

xN

3TCD

0.1s

x1

5

DtoC

10

DVD

SPEED DELAYGATE TIME

FUNC GATE

REMOTE

GP-IB

LOCAL

EQLZ LEVEL PLL

TRIG

DATA

AUTO MAN

ARM INH

SHIFT

CLOCK

PHASE

Explanation

Setting the GP-IB address

Each device that can be connected via GP-IB has a unique address within the GP-IB
system. This address is used to distinguish the device from others. When connecting
the TA120F, you must select the GP-IB address of the TA120F.
Range: 0 to 30

8

Communication Function

IM 704430-01E

8-5

8.5 Responses to Interface Messages

What Is an Interface Message

Interface messages are also referred to as interface
commands or bus commands. They are commands
that are issued by the controller. They are classified
as follows.

Uni-line messages

A single control line is used to transmit uni-line
messages. The following three messages are
available:

IFC (Interface Clear), REN (Remote Enable),

and IDY (Identify)

Multi-line messages

Eight data lines are used to transmit multi-line
messages. The messages are classified as follows:

• Address commands
These commands are valid when the instrument
is designated as a listener or as a talker. The
following five commands are available:

• Commands that are valid on an instrument

that is designated as a listener

GTL (Go To Local), SDC (Selected Device
Clear), PPC (Parallel Poll Configure),

and GET (Group Execute Trigger)

• Commands that are valid on an instrument

that is designated as a talker

TCT (Take Control)

• Universal commands
These commands are valid on all instruments
regardless of the listener and talker designations.
The following five commands are available:

LLO (Local Lockout), DCL (Device Clear),
PPU (Parallel Poll Unconfigure), SPE
(Serial Poll Enable), and SPD (Serial Poll

Disable)

• In addition, listener address, talker address, and
secondary commands are also considered
interface messages.

• The differences between
Of the multi-line messages, SDC messages are
those that require talker or listener designation
and

DCL messages are those that do not require

the designation. Therefore, SDC messages are
directed at a particular instrument while
messages are directed at all instruments on the
bus.

SDC and DCL

DCL

Responses to Interface Messages

Responses to a uni-line message

• IFC

Clears the talker and listener functions. Stops
output if data are being output.

• REN

Switches between the remote and local modes.

• IDY

Not supported.

Responses to a multi-line message (address
command)

•

GTL

Switches to the local mode.

• SDC

• Clears the program message (command)

being received and the output queue (see
page 8-40).

• The

• GET
Same operation as the “*TRG” command.

• PPC and TCT: Not supported.

Responses to a multi-line message (universal
command)

•

LLO

Disables LOCAL on the front panel to prohibit
switching to the local mode.

• DCL

Same operation as the SDC message.

• SPE

Sets the talker function on all devices on the bus
to serial polling mode. The controller polls the
devices in order.

•

SPD

Clears the serial polling mode of the talker
function on all devices on the bus.

• PPU

Not supported.

COMMunicate:WAIT command is

immediately terminated.

8-6

IM 704430-01E

8.6 Program Format

8.6.1 Symbols Used in the Syntax

The following table contains symbols that are used for
syntax, mainly in section 8.7. These symbols are
referred to as
details on the data, see pages 8-11 to 8-13.

Symbol Meaning Example

<> Defined value STATus:FILTer<x> <x>=1

STATUS:FILTER2
{} Select from values MEASure:FUNCtion

| Exclusive OR MEASure:FUNCtion

[] Can be omitted INPut:PLL[:MODE]

••• Can be repeated

BNF (Backus-Naur Form) symbols. For

to 16

Input example

{DTOC|D3T}

given in {} Input example;

MEASURE:FUNCTION DTOC

{DTOC|D3T}

Input example;

MEASURE:FUNCTION DTOC

8.6.2 Messages

Messages

Messages are used to exchange information between
the controller and the instrument. Messages that are
sent from the controller to the instrument are called
program messages and messages that are sent back
from the instrument to the controller are called
response messages.
If a program message contains a message unit that
requests a response (a query), the instrument returns
a response message upon receiving the program
message. A single response message is always
returned in response to a single program message.

Program Messages

Data that are sent from the controller to the instrument
are called program messages. The program message
format is shown below.

;

<Program message unit>

<PMT>

<Program Message Unit>

A program message consists of one or more program
message units; each unit corresponds to one
command. The instrument executes the received
commands in order.
Each program message unit is separated by a
semicolon (
For details regarding the format of the program
message unit, see the next section.

Example;

:MEASURE:FUNCTION D3T;SPEED 1.0<PMT>

;).

Unit Unit

8

Communication Function

IM 704430-01E

8-7

8.6 Program Format

<PMT>

PMT is a program message terminator. The following
three types of terminators are available.

•

NL (New Line)

Same as

•

^END

LF (Line Feed). ASCII code “0AH”

The END message (EOI signal) as defined in the
IEEE488.1. (The data byte that is sent with the END
message will be the last data of the program
message.)

• NL^END

NL with an END message attached. (NL is not

included in the program message.)

Program message unit format

The program message unit format is shown below.

,

<Program header>

<Program data>Space

<Program Header>

The program header indicates the command type. For
details, see page 8-9.

<Program Data>

If certain conditions are required in executing a
command, program data are added. A space (ASCII
code “

20H”) separates the program data from the

header. If there are multiple sets of program data, they
are separated by commas (
For details, see page 8-11.

:SAMPLE:GATE:MODE EVENT<PMT>

Example

:

,).

Response Messages

Data that are sent from the instrument to the controller
are called response messages. The response
message format is shown below.

;

<Response message unit>

<RMT>

<Response Message Unit>

A response message consists of one or more
response message units; each response message unit
corresponds to one response.
Response message units are separated by a
semicolon (

;).

For details regarding the format of the response
message unit, see the next section.

Example;

:SAMPLE:INHIBIT:STATE 1;POLARITY POSITIVE<RMT>

Unit Unit

<RMT>

<RMT> is a response message terminator. It is

NL^END.

Response message unit format

The response message unit format is shown below.

,

<Response header>

<Response data>Space

<Response Header>

A response header sometimes precedes the response
data. A space separates the data from the header.
For details, see page 8-11.

8-8

Header

Data

<Response Data>

Response data contain the content of the response. If
there are multiple sets of response data, they are
separated by commas (

Example;

500.0E-03<RMT> :SAMPLE:GATE:MODE TIME<RMT>

Data

If there are multiple queries in a program message,
responses are made in the same order as the queries.
In most cases, a single query returns a single
response message unit, but there are a few queries
that return multiple units. The first response message
unit always corresponds to the first query, but the nth
response unit may not necessarily correspond to the
nth query. Therefore, if you want to make sure that
every response is retrieved, divide the program
messages into individual messages.

,).

Header

Data

IM 704430-01E

8.6 Program Format

Precautions to Be Taken when
Transferring Messages

• If a program message that does not contain a query
is sent, the next program message can be sent at
any time.

• If a program message that contains a query is sent,
a response message must be received before the
next program message can be sent. If the next
program message is sent before the response
message is received in its entirety, an error occurs.
The response message that was not received is
discarded.

• If the controller tries to receive a response message
when there is none, an error occurs. If the
controller tries to receive a response message
before the transmission of the program message is
complete, an error occurs.

• If a program message containing multiple message
units is sent, and the message contains incomplete
units, the instrument will attempt to execute the
ones that are believed to be complete. However,
these attempts may not always be successful. In
addition, if the message contains queries, the
responses may not be returned.

Deadlock

The instrument can store response messages of length
1024 bytes or more in its buffer (The number of
available bytes varies depending on the operating
conditions). When both the transmit and receive
buffers become full at the same time, the instrument
can no longer continue to operate. This state is called
a deadlock. In this case, operation can be resumed by
discarding the program message.
Deadlock will not occur if the program message
(including the <PMT>) is kept below 1024 bytes.
Furthermore, deadlock never occurs if a program
message does not contain a query.

8.6.3 Commands

Commands

There are three types of commands (program headers)
that are sent from the controller to the instrument.
They differ in their program header formats.

Common Command Header

Commands that are defined in the IEEE 488.2-1987
are called common commands. The header format of
a common command is shown below. An asterisk (*)
is always placed in the beginning of a command.

<Mnemonic> ?

*

An example of a common command; *CLS

Compound Header

Dedicated commands used by the instrument are
classified and arranged in a hierarchy according to
their functions. The format of a compound header is
shown below. A colon (:) must be used to specify a
lower hierarchy.

:

<Mnemonic> ?:

An example of a compound header;

MEASURE:FUNCTION

Simple Header

These commands are functionally independent and do
not have a hierarchy. The format of a simple header is
shown below.

<Mnemonic> ?:

An example of a simple header; START

8

Communication Function

IM 704430-01E

Note

<mnemonic> is a character string made up of alphanumeric
characters.

8-9

8.6 Program Format

When Concatenating Commands

Command group

A command group is a group of commands that
have common compound headers arranged in a
hierarchy. A command group may contain sub­groups.

Example Group of commands related to sampling

SAMPLE?

SAMPLE:ARMING

SAMPLE:ARMING:DELAY:TIME

SAMPLE:ARMING:SLOPE

SAMPLE:ARMING:SOURCE

SAMPLE:GATE?

SAMPLE:GATE:MODE

SAMPLE:GATE:TIME

SAMPLE:INHIBIT?

SAMPLE:INHIBIT:POLARITY

SAMPLE:INHIBIT:STATE

When concatenating commands of the same group

The instrument stores the hierarchical level of the
command that is currently being executed, and
performs analysis on the assumption that the next
command sent will also belong to the same level.
Therefore, common header sections can be omitted
for commands belonging to the same group.

Example;

INPUT:DATA:TRIG:MODE MAN;LEVEL 1.000V<PMT>

When separating commands with <PMT>

If a terminator is used to separate two commands,
each command is a separate message. Therefore,
the common header must be specified for each
command even when commands belonging to the
same command group are being concatenated.

Example;

MEASURE:FUNCTION D3T<PMT>MEASURE:

SPEED 1.0<PMT>

Upper-level Query

An upper-level query is a query in which a question
mark (?) is appended to the highest level command of
a group. Execution of an upper-level query allows all
settings that can be specified in the group to be
received at once. Some query groups which are
comprised of more than three hierarchical levels can
output all the lower level settings.

Example;

SAMPLE?<PMT> -> :SAMPLE:ARMING:SOURCE AUTO;:

SAMPLE:GATE:MODE TIME;TIME 100.0E–03;:

SAMPLE:INHIBIT:STATE 0

The response to an upper-level query can be
transmitted as a program message back to the
instrument. In this way, the settings that existed when
the upper-level query was made can be restored.
However, some upper-level queries will not return setup
information that is not currently in use. It is important to
remember that not all the group’s information is
necessarily returned as part of a response.

When concatenating commands of different
groups

If the following command does not belong to the
same group, a colon (

:) is placed in front of the

header.

Example;

MEASURE:FUNCTION DTOC;:DISPLAY:SCALE R10<PMT>

When concatenating simple headers

If a simple header follows another command, a
colon (

:) is placed in front of the simple header.

Example;

MEASURE:FUNCTION DTOC;:START<PMT>

When concatenating common commands

Common commands that are defined in the IEEE

488.2-1992 are independent of hierarchy. Colons
(

:) are not needed before a common command.

Example;

MEASURE:FUNCTION D3T;*CLS;SPEED 1.0<PMT>

Header Interpretation Rules

The instrument interprets the header that is received
according to the following rules:

• Upper-case and lower-case letters of a mnemonic
are treated the same.
Example “MEASure” can also be written as

“measure” or “Measure.”

• The lower-case section of the header can be

omitted.
Example “MEASure” can also be written as “MEASU”

MEAS.”

or “

• The question mark (?) at the end of a header

indicates that it is a query. The question mark (?)
cannot be omitted.
Example The shortest abbreviation for “MEASure?”
is “MEAS?.”

• If the

• The section enclosed by braces ([]) can be omitted.

<x> (value) at the end of a mnemonic is

omitted, it is interpreted as a 1.
Example If “FILTer<x>” is written as “FILT,” it
means “FILTer1.”

Example “INPut:PLL[:MODE] 1” can be written as

INPut:PLL 1.”

“

However, the last section enclosed by braces ([])
cannot be omitted in an upper-level query.

8-10

IM 704430-01E

8.6 Program Format

8.6.4 Responses

When the controller sends a message unit that has a
question mark (?) in its program header (query), the
instrument returns a response message to the query.
A response message is returned in one of the following
two forms:

• Response consisting of a header and data
If the response can be used as a program message
without any change, it is returned with a command
header attached.
Example;

SAMPLE:GATE:MODE?<PMT> -> :SAMPLE:GATE:

MODE EVENT<RMT>

• Response consisting of data only
If the response cannot be used as a program
message unless changes are made to it (query-only
command), only the data section is returned.
However, there are query-only commands that
return responses with the header attached.
Example;

STATUS:ERROR?<PMT> -> 0,"NO ERROR"<RMT>

8.6.5 Data

Data

Data contain conditions and values that are written
after the header. A space is used to separate the
header and data. Data are classified as follows:

Data Description

<Decimal> Value expressed as a decimal number

(Example; Recall the information to be specified

-> RECALL 2)

<Voltage><Time> Physical value
<Phase> (Example; Gate time
<Percent>

<Register> Register value expressed as either binary,

<Character data> Predefined character string (mnemonic).

<Boolean> Indicates ON and OFF. Use “ON,” “OFF,” or a

-> SAMPle:GATE:TIME 1MS)

octal, decimal or hexadecimal.
(Example; Extended event register value

-> STATUS:EESE #HFE)

Selectable from { }
(Example; Gate mode selection

-> SAMPle:GATE:MODE {EVENt|TIME})

value.
(Example; Turn ON the equalizer display

INPUT:EQ:MODE ON)

->

When you wish to return a response without a
header

Responses that return both header and data can be
set so that only the data section is returned. Use
the “

COMMunicate:HEADer” command for this task.

Abbreviated form

The response header is normally returned with the
lower-case section removed. You can change this
so that the response header is in the full form. Use
the “

COMMunicate:VERBose” command for this task.

The sections enclosed by braces ([]) are also
omitted in the abbreviated form.

<Decimal>

<Decimal> indicates a value expressed as a decimal
number, as shown in the table below. Decimal values
are given in the NR form as specified in the ANSI
X3.42-1975.

Symbol Description Example

<NR1> Integer 125 –1 +1000
<NR2> Fixed point number 125.0 –.90 +001.
<NR3> Floating point number 125.0E+0 –9E–1

+.1E4
<NRf> Any of the forms

<NR1> to <NR3> is allowed.

• The instrument can receive decimal values that are
sent from the controller in any of the forms,

<NR3>. This is represented by <NRf>.

• For response messages that the instrument returns
to the controller, a specific form

<NR1> to <NR3> is

defined for each query. The same form is used
regardless of the size of the value.

• For the

<NR3> format, the “+” sign after the “E” can

be omitted. However, the “–” sign cannot be
omitted.

• If a value outside the setting range is entered, the
value will be changed to the closest value inside the
range.

• If a value has more significant digits than the
available resolution, the value is rounded.

<NR1> to

8

Communication Function

IM 704430-01E

8-11

8.6 Program Format

<Voltage>, <Time>, <Phase>, <Percent>

<Voltage>, <Time>, <Phase>, and <Percent> indicate
decimal values that have physical dimensions.
<Multiplier> or <Unit> can be attached to the <NRf>
format that was described earlier. Enter these using
any of the following forms:

Form Example

<NRf><Multiplier><Unit> 5MV

<NRf><Unit> 5E–3V

<NRf><Multiplier> 5M

<NRf> 5E–3

<Multiplier>

<Multipliers> given in the following table can be
used:

Symbol Prefix Multiplier

EX Exa 10
PE Peta 10
T Tera 10
G Giga 10
MA Mega 10
K Kilo 10
M Milli 10
U Micro 10
N Nano 10
P Pico 10
F Femto 10
A Ato 10

<Unit>

<Unit> given in the following table can be used:

Symbol Word Description

V Volt Voltage
S Second Time
PCT Percent Percentage

18

15

12

9

6

3

–3

–6

–9

–12

–15

–18

<Register>

<Register> indicates an integer that can be expressed

not only in

<Decimal> notation, but also

<Hexadecimal>, <Octal>, or <Binary>. <Register> is

used when each bit of the value has a particular
meaning. It is expressed in one of the following forms:

Form Example

<NRf> 1
#H<Hexadecimal value made up of the digits #H0F

0 to 9 and A to F>
#Q<Octal value made up of the digits 0 to 7> #q777
#B<Binary value made up of the digits 0 and 1> #B001100

• <Register> is not case sensitive.

• Response messages are always returned in the

<NR1> form.

<Character Data>

<Character data> are predefined character strings
(mnemonic). They are mainly used to indicate options.
One of the character strings given in brackets

{} is

chosen. The data interpretation is the same as the
description given in “Header Interpretation Rules” on
page 8-10.

Form Example

{EVENt|TIME|EXTernal} EVENt

• As with the header, the “COMMunicate:VERBose”
command can be used to select whether to return
the response in the full form or in the abbreviated
form.

• The “

COMMunicate:HEADer” setting does not affect

the <character data>.

<Boolean>

<Boolean> are data that indicate ON or OFF. They are

expressed in one of the following forms:

• <Multiplier> and <Unit> are not case sensitive.

•“U“ is used to indicate the micro “µ.“

•“MA“ is used for Mega to distinguish it from Milli.

• If both

<Multiplier> and <Unit> are omitted,

the default unit is used.

• Response messages are always in the <NR3>
form. Response messages are returned using
the default unit without the <Multiplier> or

<Unit>.

8-12

Form Example

{ON|OFF|<NRf>} ON OFF 1 0

• When <Boolean> is expressed in the <NRf> form,
OFF is selected if the rounded integer value is “0,”
and ON for all other cases.

• A response message is always returned with a “
the value is ON and “0” if the value is OFF.

IM 704430-01E

1” if

8.6 Program Format

<Character String Data>

Unlike the predefined character strings of <Character
data>, <Character string data> is an arbitrary character
string. The character string is enclosed in single
quotation marks (

Form Example

<Character string data> 'ABC' "IEEE488.2-1987"

• If the character string contains a double quotation
mark ("), it is represented by (""). This rule also
applies to a single quotation mark (').

• A response message is always enclosed in double
quotation marks (

• Because <Character string data> is an arbitrary
character string, if the last single quotation mark (
or double quotation mark (") is missing, the
instrument may assume that the remaining program
message units are part of the <Character string
data> and may not detect the error.

') or double quotation marks (").

").

')

8.6.6 Synchronization with the Controller

This instrument does not support overlap commands,
which allows the execution of the next command to
start before the execution of the previous command is
completed. If multiple sequential commands—the type
of commands supported by this instrument—are sent
consecutively, the execution of the next command is
delayed until the execution of the previous command is
completed.

Synchronization Using Sequential
Commands

Even for sequential commands, synchronization is
sometimes required for non communication-related
reasons such as a trigger occurrence.
For example, if the next program message is sent
when querying the measured data of a single
measurement, “
regardless of whether the data acquisition has finished
and may result in a command execution error.

:SSTart;:CALCulation:JITTer?<PMT>

In this case, the following method must be used to
synchronize with the end of the acquisition:

CALCulation:JITTer?” is executed

Using the STATus:CONDition? query

The “

STATus:CONDition?” query is used to query

the contents of the condition register (page 8-39)
You can determine whether or not the measured
data are valid by reading bit 0 of the condition
register. If bit 0 of the condition register is “
measured data are valid. If it is “

0,” measurement

or computation is in progress and the measured
data are invalid.

Example :

SSTart<PMT>

STATus:CONDition?<PMT>

(Read the response. If bit 0 is 0, repeat
this command until it becomes 1.)

CALCulation:JITTer?<PMT>

8

Communication Function

1,” the

IM 704430-01E

8-13

8.6 Program Format

Using the extended event register

The changes in the condition register can be
reflected in the extended event register (page 8-39).

Example

STATus:FILTer1 RISE;:STATus:

EESE 1;EESR?;

*SRE 8;SSTart<PMT>

(Wait for a service request)

CALCulation:JITTer?<PMT>

The “STATus:FILTer1 RISE” command sets the
transition filter so that bit 0 (FILTer1) of the
extended event register is set to “

1” when bit 0 of

the condition register changes from “0” to “1.”
The “

STATus:EESE 1” command is used to reflect

only bit 0 of the extended event register to the
status byte.
The “

STATus:EESR?” command is used to clear the

extended event register.
The “*SRE” command is used to generate a service
request solely on the cause of the extended event
register.
The “

CALCulation:JITTer?” command will not be

executed until a service request is generated.

Using the COMMunicate:WAIT command

The “

COMMunicate:WAIT” command is used to wait

for a specific event to occur.

Example

STATus:FILTer1 RISE;:STATus:EESR?;

SSTart<PMT>

(Read the response to STATus:EESR?)

COMMunicate:WAIT 1;:CALCulation:

JITTer?<PMT>

The descriptions of “STATus:FILTer1 RISE” and
“STATus:EESR?” are the same as those given in the

previous section regarding the extended event
register.
The “

COMMunicate:WAIT 1” command indicates that

the program will wait for bit 0 of the extended event
register to be set to “

1.”

The “CALCulation:JITTer?” command will not be
executed until bit 0 of the extended event register is
set to “

1.”

Note

On the TA120F, the statistical data can be read during
measurement without having to synchronize with the controller.
The value queried in this case is the previous statistical value.
Example CALCulation:JITTer?<PMT>

8-14

IM 704430-01E

8.7 Commands

8.7.1 A List of Commands

Command Function Page
CALCulation Group

:CALCulation:AVERage? Queries the average value. 8-18
:CALCulation:ELERror? Queries the Effect Length Error. 8-18
:CALCulation:FLUTter? Queries the σ/AVE value. 8-18
:CALCulation:JITTer? Queries the jitter ratio. 8-18
:CALCulation:MAXimum? Queries the maximum value. 8-18
:CALCulation:MELE? Queries the MELE value. 8-18
:CALCulation:MINimum? Queries the minimum value. 8-18
:CALCulation:PHASe? Queries the phase difference between the data signal and the clock signal. 8-18
:CALCulation:PTOPeak? Queries the P-P value. 8-18
:CALCulation:SDEViation? Queries the standard deviation (jitter σ). 8-18
:CALCulation:SNUMber? Queries the number of samples of the data signal. 8-19
:CALCulation:TVALue? Queries the period of the clock signal. 8-19

COMMunicate Group

:COMMunicate? Queries all settings related to communications. 8-20
:COMMunicate:HEADer Sets whether or not to attach a header to the response data or

queries the current setting (ON/OFF). 8-20

:COMMunicate:VERBose Sets the response messages to full form or abbreviated form or queries the

current setting. 8-20

:COMMunicate:WAIT Waits for a specified extended event. 8-20
:COMMunicate:WAIT? Creates the response that is returned when the specified event occurs. 8-20

DCOut Group

:DCOut? Queries all settings related to the DC output of the jitter ratio. 8-21
:DCOut:JITTer:COEFficient Sets the jitter ratio correction coefficient or queries the current setting. 8-21
:DCOut:JITTer:CYCLe Sets the average coefficient of the DC output of the jitter ratio or queries the

current setting. 8-21

:DCOut:JITTer:RANGe Sets the upper and lower limits of the DC output of the jitter ratio or queries

the current setting. 8-21

:DCOut:JUDGe:LEVel Sets the determination level or queries the current setting. 8-21
:DCOut:JUDGe:RESult? Queries the determination result. 8-22
:DCOut:MODE Sets the DC output mode or queries the current setting. 8-22

DISPlay Group

:DISPlay? Queries all settings related to the analog meter. 8-22
:DISPlay:MEASure Sets the measured value to be displayed or queries the current setting. 8-22
:DISPlay:SCALe Sets the scale of the analog meter or queries the current setting. 8-22
:DISPlay:STATistic Turns ON/OFF the numeric display or queries the current setting. 8-22

INPut Group

:INPut? Queries all settings related to the input signal. 8-24
:INPut:CLOCk? Queries all settings related to the clock signal input. 8-24
:INPut:CLOCk:DELay? Queries all settings related to the phase delay of the clock signal. 8-24
:INPut:CLOCk:DELay:TIME Sets the phase delay time of the clock signal or queries the current setting. 8-24
:INPut:CLOCk:SLOPe Sets the slope of the clock signal or queries the current setting. 8-24
:INPut:DATA:POLarity Sets the polarity of the data signal or queries the current setting. 8-24
:INPut:DATA:TRIGger? Queries all settings related to the trigger. 8-24
:INPut:DATA:TRIGger:MODE Sets the trigger mode or queries the current setting. 8-24
:INPut:DATA:TRIGger:LEVel Sets the slice level or queries the current setting. 8-24
:INPut:EQ[:MODE] Turns ON/OFF the equalizer or queries the current setting. 8-24
:INPut:EQ:BOOst Sets the boost amount of the equalizer or queries the current setting. 8-25
:INPut:PLL[:MODE] Sets the PLL or queries the current setting. 8-25
:INPut:PLL:STATus? Queries the lock condition (when the clock signal could be regenerated from

the data signal) of the PLL. 8-25

IM 704430-01E

8

Communication Function

8-15

8.7 Commands

Command Function Page
MEASure Group

:MEASure? Queries all settings related to the measurement. 8-25
:MEASure:FUNCtion Sets the measurement function or queries the current setting. 8-25
:MEASure:SPEed Sets the ×N speed or queries the current setting. 8-25

MEMory Group

:MEMory? Queries all settings related the external transmission of the measured data. 8-26
:MEMory:BYTeorder Sets the transmission order of binary data or queries the current setting. 8-26
:MEMory:DATaselect Sets the data to be transmitted or queries the current setting. 8-26
:MEMory:END? Queries the end position of the data to be transmitted. 8-27
:MEMory:Format Sets the format of the data to be transmitted or queries the current setting. 8-27
:MEMory:SEND? Executes the transmission of the measured data specified by

“MEMory:DATaselect.” 8-27
:MEMory:SIZE? Queries the number of data points that have been measured. 8-27
:MEMory:STARt? Queries the start position of the data to be transmitted. 8-27

RECall Group

:RECall Recalls the setup information. 8-28

SAMPle Group

:SAMPle? Queries all settings related to the acquisition of the input signal. 8-29
:SAMPle:ARMing? Queries all settings related to arming. 8-29
:SAMPle:ARMing:DELay:TIME Sets the arming delay time or queries the current setting. 8-29
:SAMPle:ARMing:SLOPe Sets the arming slope or queries the current setting. 8-30
:SAMPle:ARMing:SOURce Sets the arming source or queries the current setting. 8-30
:SAMPle:GATE? Queries all settings related to the gate. 8-30
:SAMPle:GATE:MODE Sets the gate mode or queries the current setting. 8-30
:SAMPle:GATE:TIME Sets the gate time or queries the current setting. 8-30
:SAMPle:INHibit? Queries all settings related to inhibit. 8-30
:SAMPle:INHibit:POLarity Sets the polarity of inhibit or queries the current setting. 8-30
:SAMPle:INHibit:STATe Turns ON/OFF inhibit or queries the current setting. 8-30

SSTart Group

:SSTart Executes single measurement. 8-30

STARt Group

:STARt Starts the measurement. 8-30

STATus Group

:STATus? Queries all settings related to the communication status. 8-31
:STATus:CONDition? Queries the contents of the condition register. 8-31
:STATus:EESE Sets the extended event enable register or queries the current setting. 8-31
:STATus:EESR? Queries the content of the extended event register and clears the register. 8-31
:STATus:ERRor? Queries the error code and message information. 8-31
:STATus:FILTer? Sets the transition filter or queries the current setting. 8-31
:STATus:QMESsage Sets whether or not to attach message information to the response to the

“:STATus:ERRor?” query or queries the current setting. 8-31

STOP Group

:STOP Stops the measurement. 8-32

STORe Group

:STORe Stores the setup information. 8-32

8-16

IM 704430-01E

8.7 Commands

Command Function Page
UNIT Group

:UNIT? Queries the default unit of voltage and time. 8-33
:UNIT:TIME Sets the default unit of time or queries the current setting. 8-33
:UNIT:VOLTage Sets the default unit of voltage or queries the current setting. 8-33

Common Command Group

*CAL? Performs calibration and queries the result. 8-34
*CLS Clears the standard event register, extended event register, and error queue. 8-34
*ESE Sets the standard event enable register or queries the current setting. 8-34
*ESR? Queries the standard event register and clears the register. 8-34
*IDN? Queries the instrument model. 8-34
*OPC Sets whether or not to clear the OPC event upon the completion of the

specified overlap command. 8-34

*OPC? Creates a response upon the completion of the specified overlap command. 8-34
*RST Initializes the setup information. 8-35
*SRE Sets the service request enable register or queries the current setting. 8-35
*STB? Queries the status byte register. 8-35
*TRG Executes single measurement. 8-35
*TST? Performs a self-test and queries the result. 8-35
*WAI Holds the subsequent command until the completion of the specified overlap

operation. 8-35

8

Communication Function

IM 704430-01E

8-17

8.7 Commands

8.7.2 CALCulation Group

The commands in this group deal with statistics. For details on setting the statistical equation, see the next
page.

;

:CALCulation :

SDEViation

AVERage

ELERror

FLUTter

JITTer

MAXimum

MELE

MINimum

PHASe

PTOPeak

SNUMber

TVALue

?

?

?

?

?

?

?

?

?

?

?

?

:CALCulation:AVERage?

Function Queries the average value.

Syntax :CALCulation:AVERage?
Example :CALCULATION:AVERAGE? -> 1.8542E–8

Description If the statistical value is not valid, “NAN” is

returned.

:CALCulation:ELERror?

Function Queries the Effect Length Error.

Syntax :CALCulation:ELERror?
Example :CALCULATION:ELERROR -> 4.2E–11

Description If the statistical value is not valid, “NAN” is

returned.

:CALCuIation:FLUTter?

Function Queries the σ/AVE value (flutter).

Syntax :CALCuIation:FLUTter?
Example :CALCULATION:FLUTTER? -> 1.5979E+1

Description If the statistical value is not valid, “NAN” is

returned in response to a query.

:CALCulation:JITTer?

Function Queries the jitter ratio.

Syntax :CALCulation:JITTer?
Example :CALCULATION:JITTER? -> 8.008E+00

Description If the statistical value is not valid, “NAN” is

returned.

:CALCulation:MAXimum?

Function Queries the maximum value.

Syntax :CALCulation:MAXimum?
Example :CALCULATION:MAXIMUM? -> 1.8967E–8

Description If the statistical value is not valid, “NAN” is

returned.

:CALCuIation:MELE?

Function Queries the MELE value.

Syntax :CALCuIation:MELE?
Example :CALCULATION:MELE? -> 1.13E–1

Description If the statistical value is not valid, “NAN“ is

returned in response to a query.

:CALCulation:MINimum?

Function Queries the minimum value.

Syntax :CALCulation:MINimum?
Example :CALCULATION:MINIMUM? -> 1.7945E–8

Description If the statistical value is not valid, “NAN” is

returned.

:CALCulation:PHASe?

Function Queries the phase difference (in the range from

0 to 360°) between the data signal and the clock
signal.

Syntax :CALCulation:PHASe?
Example :CALCULATION:PHASE? -> 1.643E+2

Description If the statistical value is not valid or the

measurement function is “D3T,” “NAN” is returned.

:CALCulation:PTOPeak?

Function Queries the P-P value.

Syntax :CALCulation:PTOPeak?
Example :CALCULATION:PTOPEAK? -> 1.022E–9

Description If the statistical value is not valid, “NAN” is

returned.

:CALCulation:SDEViation?

Function Queries the standard deviation (jitter σ).

Syntax :CALCulation:SDEViation?
Example :CALCULATION:SDEVIATION? -> 2.963E–

9

Description If the statistical value is not valid, “NAN” is

returned.

8-18

IM 704430-01E

ELError

= AVE

– X

CENTER

8.7 Commands

:CALCulation:SNUMber?

Function Queries the number of samples (number of

samples used to compute the statistics) of the
data signal.

Syntax :CALCulation:SNUMber?
Example :CALCULATION:SNUMBER? -> 1.000E+3

Description If the statistical value is not valid, “NAN” is

returned.

:CALCulation:TVALue?

Function Queries the period of the clock signal.

Syntax :CALCulation:TVALue?
Example :CALCULATION:TVALUE? -> 37.000E–9

Description The result of the query is as follows:

• If the measurement function is “DTOC” and
period T of the clock signal could be
measured, the measured value is returned. If
the statistical value is not valid, “NAN” is
returned. If period T of the clock signal could
not be measured, “37.000ns” is returned.

• If the measurement function is “D3T” and the
statistical value is valid, the result derived
from calculating “231.385 ns/×N speed” is
returned. If the statistical value is not valid,
“NAN” is returned. The “:MEASure:SPEed”
command is used to set the ×N speed.

Equations Used to Derive Statistics

In the equation below, n is the number of bins in the
histogram. A bin of a histogram refers to a bar that
indicates the frequency of occurrence on the
histogram. Xi is the class value of each bin of the
histogram. Of the following items, only the jitter and
jitter ratio can be indicated on the analog meter and
display:

• Maximum value (MAX)

Indicates the maximum class value.

MAX

man

i

]

= [ X

• Minimum value (MIN)

Indicates the minimum class value.

MIN

min

i

]

= [ X

• Average value (AVE)

Computes the average value. Pi is the relative
frequency*.

n

= Σ Xi × P

AVE

* If the total number of samples on which the statistics are being

calculated is N, and the frequency of occurrence (number of
samples) of a certain bin is Ni, then the relative frequency
becomes Pi = Ni/N.

i = 1

i

• Standard deviation (jitter σ)

Computes the standard deviation. Pi is the relative

frequency.

n

σ = Σ (Xi – AVE)2 × Pi

i = 1

• Peak-to-Peak (P-P)

Calculates the difference between the maximum

and minimum values.

P-P = MAX – MIN

• Flutter (σ/AVE)

Computes the flutter. Indicates the standard

deviation as a ratio with respect to the average
value.

σ

× 100(%)

=

σ / AVE

AVE

• Jitter ratio (σ/T)

Computes the jitter ratio by using period T of the

clock signal. T is the period of the clock signal of
the CD or DVD. When the measurement function is
3T jitter, T = 231.385/N (where N is the multi-speed
value). When the measurement function is D-to-C
jitter, T is the period of the clock signal that is
applied to the clock input connector or regenerated
by the PLL circuit.

σ

=

σ / T

T

× 100(%)

• ELError (Effect Length Error)

XCENTER is the center value of the histogram.

Originally, XCENTER represented the value around
which the measured data would be distributed.
ELError indicates the offset of the actually
measured average value AVE with respect to the
XCENTER value.

For D-to-C jitter

X

CENTER

T

=

2

For 3T jitter

=

CENTER

3T X

T is the same as the T of the aforementioned “Jitter

ratio (σ/T).”

• MELE (Maximum Effect Length Error)

Computes the MELE using period T of the clock

signal. MELE is indicated as a ratio with respect to
T of ELError. For information on T, see “Jitter ratio
(σ/T).”

AVE – X

CENTER

MELE

=

T

× 100(%)

8

Communication Function

IM 704430-01E

8-19

8.7 Commands

8.7.3 COMMunicate Group

The commands in this group deal with communications.

;

:COMMunicate :

HEADer <Space> OFF

VERBose <Space> OFF

WAIT <Space> <Register>

ON

<NRf>

?

ON

<NRf>

?

?

?

:COMMunicate?

Function Queries all settings related to communications.

Syntax :COMMunicate?
Example :COMMUNICATE? -> :COMMUNICATE:

HEADER 1;VERBOSE 1

:COMMunicate:HEADer

Function Sets whether or not to attach a header to the

response data or queries the current setting
(ON/OFF).

Syntax :COMMunicate:HEADer <Boolean>

:COMMunicate:HEADer?

Example :COMMUNICATE:HEADER ON

:COMMUNICATE:HEADER? ->
:COMMUNICATE:
HEADER 1

:COMMunicate:VERBose

Function Sets the response messages to full form or

abbreviated form or queries the current setting.

Syntax :COMMunicate:VERBose <Boolean>

:COMMunicate:VERBose?

Example :COMMUNICATE:VERBOSE OFF

:COMMUNICATE:VERBOSE?:COMMUNICATE:
VERBOSE 0

:COMMunicate:WAIT

Function Waits for one of the specified extended events

to occur.

Syntax :COMMunicate:WAIT <Register>

<Register>=0 to 65535

Example :COMMUNICATE:WAIT 65535

:COMMunicate:WAIT?

Function Creates the response that is returned when the

specified event occurs.

Syntax :COMMunicate:WAIT? <Register>

<Register>=0 to 65535

Example :COMMUNICATE:WAIT? 65535 -> 1

8-20

IM 704430-01E

8.7.4 DCOut Group

The commands in this group deal with DC output of the jitter ratio.

8.7 Commands

;

:DCOut :

MODE <Space> JITTer

JITTer : COEFfcient <Space>

JUDGe :

:DCOut?

Function Queries all settings related to the DC output of

the jitter ratio.

Syntax :DCOut?
Example :DCOUT? -> :DCOUT:MODE JITTER

:DCOut:JITTer:COEFficient

Function Sets the jitter ratio correction coeffecient or

queries the current setting.

Syntax :DCOut:JITTer:COEFficient

<NRf>,<NRf>

:DCOut:JITTer:COEFficient?
First parameter <NRf>=0.0001 to

9.9999 (in 0.0001 steps)

Second parameter <NRf>=–9.999 to

9.999 (in 0.001 steps)

The first parameter is correction
coefficient a, the second parameter
is correction coefficient b,
respectively.

Example :DCOUT:JITTER:COEFFICIENT

1.2500,0.100

:DCOUT:JITTER:COEFFICIENT? ->

1.2500E+00,0.001E+02

:DCOut:JITTer:CYCLe

Function Sets the average coefficient (number of measured

values to be averaged) of the DC output of the jitter
ratio or queries the current setting.

Syntax :DCOut:JITTer:CYCLe <NRf>

:DCOut:JITTer:CYCLe?
<NRf>=1 to 10 (in 1 steps)

Example :DCOUT:JITTER:CYCLE 1

:DCOUT:JITTER:CYCLE? -> 1

JUDGe

?

;

<NRf> <NRf>

?

CYCle

RANGe <Space> <NRf> <NRf>

;

<Space> <NRf>

?

?

LEVel <Space> <NRf>

RESult ?

?

,

,

?

:DCOut:JITTer:RANGe

Function Sets the upper and lower limits of the DC output

of the jitter ratio or queries the current setting.

Syntax :DCOut:JITTer:RANGe <NRf>,<NRf>

:DCOut:JITTer:RANGe?
First parameter <NRf>=0.00% to

25.00% (in 0.01% steps)
Second parameter <NRf>=0.00% to

25.00% (in 0.01% steps)
The first and second parameters are
upper and lower limits,
respectively. If the upper limit
is less than or equal to the lower
limit, an error occurs.

Example :DCOUT:JITTER:RANGE 25.00,0.00

:DCOUT:JITTER:RANGE? ->

25.00E+00,0.00E+00

:DCOut:JUDGe:LEVel

Function Sets the determination level or queries the

current setting.

Syntax :DCOut:JUDGe:LEVel {<NRf>}

:DCOut:JUDGe:LEVel?
<NRf>=0.00% to 25.00% (in 0.01%
steps)

Example :DCOUT:JUDGE:LEVEL 10.00

:DCOUT:JUDGE:LEVEL? -> 10.00E+00

8

Communication Function

IM 704430-01E

8-21

8.7 Commands

:DCOut:JUDGe:RESult?

Function Queries the determination result.

Syntax :DCOut:JUDGe:RESult?
Example :DCOUT:JUDGE:RESULT? -> GO

Description This command can be used only when the DC

output mode is set to “JUDGe.”

• If the result is GO, “GO” is returned.

• If the result is NOGO, “NOGO” is returned.

• If the result is NOJUDGE, “NOJUD” is

returned.

• If the PLL is turned ON, determination cannot be
performed until the clock signal is regenerated
from the data signal. If the clock signal cannot be
regenerated, “NOJUD” is returned.

8.7.5 DISPlay Group

The commands in this group deal with the display.

;

:DISPlay : SCALe <Space> R10

STATistic <Space> OFF

MEASure <Space>

:DCOut:MODE

Function Sets the DC output mode or queries the current

setting.

Syntax :DCOut:MODE {JITTer|JUDGe}

:DCOut:MODE?

Example :DCOUT:MODE JITTER

:DCOUT:MODE? -> :DCOUT:MODE JITTER

R20

?

ON

<NRf>

?

JITTer

SDEViation

AVERage

?

?

:DISPlay?

Function Queries all settings related to the display.

Syntax :DISPlay?
Example :DISPLAY? -> :DISPLAY:SCALE R10;

STATISTIC 1;UNIT NS

:DISPlay:MEASure

Function Sets the measured value to displayed or queries

the current setting.

Syntax :DISPlay:MEASure {JITTer|SDEViation|

AVERage}
:DISPlay:MEASure?

Example :DISPLAY:MEASURE JITTER

:DISPLAY:MEASURE ->
:DISPLAY MEASURE JITTER

:DISPlay:SCALe

Function Sets the scale of the analog meter or queries

the current setting.

Syntax :DISPlay:SCALe {R10|R20}

:DISPlay:SCALE?

Example :DISPLAY:SCALE R10

:DISPLAY:SCALE? -> :DISPLAY:SCALE R10

8-22

:DISPlay:STATistic

Function Turns ON/OFF the numeric display or queries

the current setting.

Syntax :DISPlay:STATistic {Boolean}

:DISPlay:STATistic?

Example :DISPLAY:STATISTIC ON

:DISPLAY:STATISTIC? ->
:DISPLAY:STATISTIC 1

IM 704430-01E

8.7.6 INPut Group

The commands in this group deal with the input signal.

:INPut

:

;

CLOCk

DATA

;

:

SLOPe <Space>

DELay

;

:

TRIGger

POLarity <Space> POSitive

;

:

:

RISE

FALL

?

;

NEGative

BOTH

<Space>

<Space>

<Time>

?

?

?

AUTO

BOTH

?

<Voltage>

?

?

TIME

;

MODE <Space> MANual

LEVel

?

?

8.7 Commands

8

Communication Function

EQ : MODE

BOOst

;

PLL : MODE <Space> OFF

ST ATus ?

?

<Space>

<Space>

OFF

ON

<NRf>

?

<NRf>

?

ON

<NRf>

?

IM 704430-01E

8-23

8.7 Commands

:INPut?

Function Queries all settings related to the input signal.

Syntax :INPut?
Example :INPUT? -> :INPUT:DATA:TRIGGER:

MODE AUTO;INPUT:DATA:
POLARITY POSITIVE;CLOCK:
SLOPE POSITIVE;CLOCK:DELAY:
TIME 10.0E–09;EQ 0;PLL 0

:INPut:CLOCk?

Function Queries all settings related to the clock signal

input.

Syntax :INPut:CLOCk?
Example :INPUT:CLOCK? -> :INPUT:CLOCK:

SLOPE RISE

Description This command can be used only when the

measurement function is set to “DTOC.”

:INPut:CLOCk:DELay?

Function Queries all settings related to the phase delay of

the clock signal.

Syntax :INPut:CLOCk:DELay?
Example :INPUT:CLOCK:DELAY? ->

:INPUT:CLOCK:DELAY:;
TIME 10.0E–09

Description This command can be used only when the

measurement function is set to “DTOC.”

:INPut:CLOCk:DELay:TIME

Function Sets the phase delay time of the clock signal or

queries the current setting.

Syntax :INPut:CLOCk:DELay:TIME <Time>

:INPut:CLOCk:DELay:TIME?
<Time>=0.0 ns to 40.0 ns (in 0.1 ns
steps)

Example :INPUT:CLOCK:DELAY:TIME 10NS

:INPUT:CLOCK:DELAY:TIME? ->
:INPUT:CLOCK:
DELAY:TIME 10.0E–09

Description This command can be used only when the

measurement function is set to “DTOC.”

:INPut:CLOCk:SLOPe

Function Sets the slope of the clock signal or queries the

current setting.

Syntax :INPut:CLOCk:SLOPe {RISE|FALL}

INPut:CLOCk:SLOPe?

Example :INPUT:CLOCK:SLOPE RISE

:INPUT:CLOCK:SLOPE? ->
:INPUT:CLOCK:
SLOPE RISE

Description This command can be used only when the

measurement function is set to “DTOC.”

8-24

:INPut:DATA:POLarity

Function Sets the polarity of the data signal or queries

the current setting.

Syntax :INPut:DATA:POLarity {POSitive|

NEGative|BOTH}
:INPut:DATA:POLarity?

Example :INPUT:DATA:POLARITY POSITIVE

:INPUT:DATA:POLARITY? ->
:INPUT:DATA:
POLARITY POSITIVE

Description When the measurement function is “D3T,”

“BOTH” cannot be specified.

:INPut:DATA:TRIGger?

Function Queries all settings related to the trigger.

Syntax :INPut:DATA:TRIGger?
Example :INPUT:DATA:TRIGGER? ->

:INPUT:DATA:TRIGGER:
MODE AUTO;POLARITY POSITIVE

:INPut:DATA:TRIGger:MODE

Function Sets the trigger mode or queries the current

setting.

Syntax :INPut:DATA:TRIGger:MODE

{AUTO|MANual|
BOTH}
:INPut:DATA:TRIGger:MODE?

Example :INPUT:DATA:TRIGGER:MODE AUTO

:INPUT:DATA:TRIGGER:MODE? ->
:INPUT:DATA:TRIGGER:MODE AUTO

:INPut:DATA:TRIGger:LEVel

Function Sets the slice level or queries the current setting.

Syntax :INPut:DATA:TRIGger:LEVel <Voltage>

:INPut:DATA:TRIGger:LEVel?
(When TriggerMode = MANual)

• When the equalizer is OFF

<Voltage> = –5.000 V to 5.000 V
(in 1 mV steps)

• When the equalizer is ON

<Voltage> = –1.000 V to 1.000 V

(in 1 mV steps)
(When TriggerMode = BOTH)
<Voltage> = –1.000 V to 1.000 V (in
1 mV steps)

Example :INPUT:DATA:TRIGGER:LEVEL 1V

:INPUT:DATA:TRIGGER:LEVEL? ->
:INPUT:DATA:
TRIGGER:LEVEL 1.000E+00

Description • You can set or query the slice level when the

trigger mode is “MANual” or “BOTH.”

• The slice levels for “MANual” and “BOTH” are

stored separately.

:INPut:EQ[:MODE]

Function Turns ON/OFF the equalizer or queries the

current setting.

Syntax :INPut:EQ[:MODE] {Boolean}

:INPut:EQ[:MODE]?

Example :INPUT:EQ:MODE ON

:INPUT:EQ:MODE? -> :INPUT:EQ:MODE 1

IM 704430-01E

8.7 Commands

:INPut:EQ:BOOst

Function Sets the boost amount of the equalizer or

queries the current setting.

Syntax :INPut:EQ:BOOst <NRf>

:INPut:EQ:BOOst?
<NRf>=2.0 to 6.0dB (0.1dB steps)

Example :INPut:EQ:BOOST 3.2dB

:INPut:EQ:BOOST? -> :INPut:EQ:
BOOST 3.2E+00

:INPut:PLL[:MODE]

Function Sets the PLL or queries the current setting.

Syntax :INPut:PLL[:MODE] {Boolean}

:INPut:PLL[:MODE]?

Example :INPUT:PLL:MODE ON

:INPUT:PLL:MODE? -> :INPUT:PLL:MODE 1

Description You can set or query the PLL only when the

measurement function is set to “DTOC.”

8.7.7 MEASure Group

The commands in this group deal with measurement conditions.

;

:MEASure

:

FUNCtion <Space> DTOC

SPEed <Space> <NRf>

:INPut:PLL:STATus?

Function Queries the lock condition (when the clock

signal could be regenerated from the data
signal) of the PLL.

Syntax :INPut:PLL:STATus?
Example :INPUT:PLL:STATUS? -> :INPUT:PLL:

STATUS LOCK

Description You can query the PLL only when the

measurement function is set to “DTOC” and the
PLL is “ON.”

• When not locked: UNLOCK is returned.

• When locked: LOCK is returned.

D3T

?

?

?

8

Communication Function

:MEASure?

Function Queries all settings related to the measurement.

Syntax :MEASure?
Example :MEASURE? -> :MEASURE:FUNCTION DTOC

:MEASure:FUNCtion

Function Sets the measurement function or queries the

current setting.

Syntax :MEASure:FUNCtion {DTOC|D3T}

:MEASure:FUNCTION?

Example :MEASURE:FUNCTION DTOC

:MEASURE:FUNCTION? -> :MEASURE:
FUNCTION DTOC

:MEASure:SPEed

Function Sets the ×N speed or queries the current

setting.

Syntax :MEASure:SPEed <NRf>

:MEASure:SPEed?
<NRf>=1.0 to 10.0

Example :MEASURE:SPEED 1.0

:MEASURE:SPEED? -> :MEASURE:
SPEED 1.0E+00

Description This command can be used only when the

measurement function is set to “D3T.”

IM 704430-01E

8-25

8.7 Commands

8.7.8 MEMory Group

The commands in this group deal with the external transmission of the measured data. The raw data that
has been measured is externally transmitted in ASCII or binary format. For a detailed description of this
function, see the next page.

;

:MEMor y : DATaselect <Space> TSTamp

MEASuredata

FREQuency

?

FORMat <Space> ASCii

BINar y

?

BYTeorder <Space> LSBFirst

MSBFirst

?

STARt ?

END ?

SIZE ?

SEND ?

?

:MEMory?

Function Queries all settings related the external

transmission of the measured data.

Syntax :MEMory?
Example :MEMORY? -> :MEMORY:

DATASELECT FREQUENCY; FORMAT ASCII;
BYTEORDER LSBFIRST

:MEMory:BYTeorder

Function Sets the transmission order of binary data or

queries the current setting.

Syntax :MEMory:BYTeorder

{LSBFirst|MSBFirst}

:MEMory:BYTeorder?

Example :MEMORY:BYTEORDER LSBFIRST

:MEMORY:BYTEORDER? -> :MEMORY:
BYTEORDER LSBFIRST

:MEMory:DATaselect

Function Sets the data to be transmitted or queries the

current setting.

Syntax :MEMory:DATaselect

{TSTamp|MEASuredata|
FREQuency}
:MEMory:DATaselect?

Example :MEMORY:DATASELECT FREQUENCY

:MEMORY:DATASELECT? -> :MEMORY:
DATASELECT FREQUENCY

Example The transmitted data varies depending on the

measurement function.

• When the measurement function is set to

“DtoC” or “3T”:

MEASuredata (measured time data) and

FREQuency (histogram frequency data)

• When the measurement function is set to

“WOBBle” (BI-PHASE measurement function

option, see the TA120F Digital Jitter Meter

Optional Function User’s Manual (IM704430-

51E)):

TSTamp (measured time stamp) and

MEASuredata (measured time data)

8-26

IM 704430-01E

8.7 Commands

:MEMory:END?

Function Queries the end position of the data to be

transmitted.

Syntax :MEMory:END?
Example :MEMORY:END? -> :MEMORY:

END 37.0E-9<Time>

Example You cannot make a query when the

measurement function is set to “WOBBle” (BI­PHASE measurement function option, see the
TA120F Digital Jitter Meter Optional Function
User’s Manual (IM704430-51E)).

:MEMory:FORMat

Function Sets the format of the data to be transmitted or

queries the current setting.

Syntax :MEMory:FORMat {ASCii|BINary}

:MEMory:FORMat?

Example :MEMORY:FORMAT ASCII

:MEMORY:FORMAT? -> :MEMORY:
FORMAT ASCII

:MEMory:SEND?

Function Executes the transmission of the measured data

specified by “MEMory:DATaselect.”

Syntax :MEMory:SEND?
Example :MEMORY:SEND? ->

#800000016abcdabcea

Example (When the format is ASCII)

• For measured time stamp and measure time
data

<Time>,<Time>.....

• For histogram frequency data

<NR1>,<NR1>.....

(When the format is binary)
#800100000ABCDEFGHIJ

• #8: Indicates that an 8-digit value follows.

• 8-digit value 00100000: Indicates the number

of transmitted data bytes. The number of
transmitted bytes is 10000.

• ABCDEFGHIJ....: Indicates the actual number

of data bytes.

Frequency (FREQuency):
The frequency is stored using a 4-byte unsigned
integer.
Measured data (MEASuredata):
4-byte unsigned integer. The measured value is
derived by multiplying the resolution below.

DtoC, 3T: 312.5 ns
BI-PHASE (option, see the TA120F Digital
Jitter Meter Optional Function User’s Manual
(IM704430-51E)): 156.25 ns

Measured time stamp (TSTamp):
4-byte unsigned integer. The time stamp value
is derived by multiplying 160.0 ns to this value.

:MEMory:SIZE?

Function Queries the number of data points that have

been measured.

Syntax :MEMory:SIZE?
Example :MEMORY:SIZE? -> 100000

Example You can make a query only when the

measurement function is set to “WOBBle” (BI­PHASE measurement function option, see the
TA120F Digital Jitter Meter Optional Function
User’s Manual (IM704430-51E)).

:MEMory:STARt?

Function Queries the start position of the data to be

transmitted.

Syntax :MEMory:STARt?
Example :MEMORY:START? -> :MEMORY:

START 0.0E-9 <Time>

Example You cannot make a query when the

measurement function is set to “WOBBle” (BI­PHASE measurement function option, see the
TA120F Digital Jitter Meter Optional Function
User’s Manual (IM704430-51E)).

Transmitted Data

The transmitted data varies depending on the
measurement function.

• When the measurement function is set to D-to-C
jitter or 3T jitter

Measured time data and histogram frequency data

• When the measurement function is set to BI-PHASE
(option, see the TA120F Digital Jitter Meter Optional
Function User’s Manual (IM704430-51E))

Measured time stamp and measured time data

Transmitted Range

All the data that the TA120F is computing within the
window range are transmitted. The transmitted range
varies depending on the measurement function as
follows:

• When the measurement function is set to DtoCDVD:

0 ns to T (T: the measured clock value when PLL is

OFF, the regenerated clock value when PLL is ON)

• When the measurement function is set to 3TCD×1
or 3TCD×N:

2.5T to 3.5T(T: 231.385 ns/×N speed)

• When the measurement function is set to BI-PHASE
(option, see the TA120F Digital Jitter Meter Optional
Function User’s Manual (IM704430-51E)):

Data corresponding to the number of samples

acquired

Note

• Data cannot be transmitted while measurement is in progress.
Data can only be transmitted after the measurement has
finished.

8

Communication Function

IM 704430-01E

8-27

8.7 Commands

8.7.9 RECall Group

:RECall <Space> <NRf>

:RECall

Function Recalls the setup information.

Syntax :RECall <NRf>

<NRf>=0 to 6

Example :RECALL 1

8-28

IM 704430-01E