YOKOGAWA TA320 User Manual
Time Interval Analyzer
Yokogawa Electric Corporation
IM 704210-01E
1st Edition
Foreword
Notices
Trademarks
Thank you for purchasing the YOKOGAWA TA320 Time Interval Analyzer.
This user’s manual contains useful information about the functions and operating methods of the
instrument. It also contains precautions that should be observed during use. To ensure correct use
of the instrument, please read this manual thoroughly before operating it.
Keep the manual in a safe place for quick reference whenever a question arises.
The following manual is provided with this instrument in addition to this manual.
Manual Name Manual No. Description
TA320 GP-IB Interface IM704210-12E Describes the communication functions for the GP-IB
User’s Manual interface.
• The contents of this manual are subject to change without prior notice as a result of
improvements in the instrument’s performance and functions. Display contents illustrated in
this manual may differ slightly from what actually appears on your screen.
• Every effort has been made in the preparation of this manual to ensure the accuracy of its
contents. However, should you have any questions or find any errors, please contact your
nearest YOKOGAWA representative as listed on the back cover of this manual.
• Copying or reproduction of all or any part of the contents of this manual without
YOKOGAWA’s permission is strictly prohibited.
• MS-DOS is a registered trademark of Microsoft Corporation.
• HP-GL is a registered trademark of Hewlett-Packard Company.
Revisions
• 1st Edition : December 1996
Disk No. HF07
1st Edition: December 1996 (YG)
All Rights Reserved, Copyright © 1996 Yokogawa Electric Corporation
IM 704210-01E
1
Checking the Contents of the Package
Unpack the box and check the contents before operating the instrument. If the wrong instrument
or accessories have been delivered, if some accessories are missing or if they appear abnormal,
contact the dealer from which you purchased them.
Main Body
Check that the model name and suffix code given on the name plate of the rear panel match those
on your order.
Nameplate
MODEL (Type Name)
704210
SUFFIX (Suffix Code)
Item Suffix Code Specifications
Power voltage •••••••••••••••••••• 100-240 VAC
Power cord -D UL/CSA Standards 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)
[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 No.)
When contacting the dealer from which you purchased your instrument, please quote the
instrument No.
Note
It is recommended that the packing box be kept in a safe place. The box can be used when you need to
transport the instrument somewhere.
2
IM 704210-01E
Standard Accessories
Checking the Contents of the Package
The following standard accessories are supplied with the instrument. Make sure that all items are
present and undamaged.
Power cord (one of the following power cords
is supplied according to the instrument's suffix codes)
Optional Accessories
UL/CSA standard
A1006WD
D
VDE standard
A1009WD
F Q R
Rubber feet(2pcs)
(A9088ZM(1pc))
BS standard
A1054WD
User's manual
Communication interface
manual
SAA standard
A1024WD
(1pc)
(1pc)
The following optional accessories are available. On receiving these optional accessories, make
sure that all the items that you ordered have been supplied and that they are undamaged.
If you have any questions regarding optional accessories, or if you wish to place an order, contact
the dealer from whom you purchased them.
Part Name Part No. Minimum Q’ty Remarks
150 MHz passive probe 700996 1 Input impedance: 10 MΩ, Length: 1.5 m
BNC cable (1m) 366924 1 BNC-BNC, Length: 1 m
BNC cable (2m) 366925 1 BNC-BNC, Length: 2 m
Rack-mount kit 751533-E3 1 For EIA single mount
Rack-mount kit 751534-E3 1 For EIA dual mount
Rack-mount kit 751533-J3 1 For JIS single mount
Rack-mount kit 751534-J3 1 For JIS dual mount
IM 704210-01E
3
Safety Precautions
This instrument is an IEC safety class I instrument (provided with terminal for protective
grounding).
The following general safety precautions must be observed during all phases of operation, service
and repair of this instrument. If this instrument is used in a manner not sepecified in this manual,
the protection provided by this instrument may be impaired. Also, YOKOGAWA Electric
Corporation assumes no liability for the customer’s failure to comply with these requirements.
The following symbols are used on this instrument.
To avoid injury, death of personnel
or damage to the instrument, the
operator must refer to an explanation
in the User’s Manual or Service
Manual.
Make sure to comply with the following safety precautions. Not complying might
result in injury, death of personnel or damage to the instrument.
Alternating current.
ON(power).
OFF(power).
WARNING
Power Supply
Ensure the source voltage matches the voltage of the power supply before turning ON the
power.
Power Cable and Plug
To prevent an electric shock or fire, be sure to use the power cord supplied by
YOKOGAWA. The main power plug must be plugged in an outlet with protective
grounding terminal. Do not invalidate protection by using an extension cord without
protective grounding.
Protective Grounding
Make sure to connect the protective grounding to prevent an electric shock before
turning ON the power.
Necessity of Protective Grounding
Never cut off the internal or external protective grounding wire or disconnect the wiring
of protective grounding terminal. Doing so poses a potential shock hazard.
Defect of Protective Grounding and Fuse
Do not operate the instrument when protective grounding or fuse might be defective.
Do not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable liquids or vapors. Operation
of any electrical instrument in such an environment constitutes a safety hazard.
Do not Remove any Covers
There are some areas with high voltages. Do not remove any cover if the power supply is
connected. The cover should be removed by qualified personnel only.
External Connection
To ground securely, connect the protective grounding before connecting to measurement
or control unit.
4
IM 704210-01E
Structure of the Manual
This User’s Manual consists of 12 chapters and an Index as described below.
Chapter1 Functions
Describes the measuring principles and functions of the instrument. No description is given for
operating methods, however it is recommended that this chapter be read before operating the
instrument to gain a basic understanding of what the instrument can do.
Chapter2 Name and Use of Each Part
Describes the name and function of each part of the instrument. For keys and rotary knob,
reference sections (or page numbers) are also given.
Chapter3 Before Starting Measurement
Describes usage precautions, how to install the instrument, connect the power cord, turn the
power switch ON/OFF, connect a probe and set the date and time.
Chapter4 Common Operations
Describes how to start and stop acquisition of a measuring input signal and set a numerical value
using the ten-key.
Chapter5 Setting the Sampling Mode and Measurement Function (Item)
Describes how to set the sampling mode and measurement function (item).
Chapter6 Setting the Acquisition Conditions for Input Signal to be Measured
Describes how to set the acquisition conditions for the input signal to be measured, including
input coupling, input impedance, trigger mode and trigger level, gate type, sample size and
sampling interval, arming source, slope, delay types, and inhibit.
Chapter7 Displaying the Measured/Computed Data
Describes how to display a histogram, time variation, list of measured data and statistic values,
and how to set multi-window, panorama display and histogram data addition functions.
Chapter8 Storing and Recalling the Set-up Information from the Internal Memory
Describes how to store the set-up information to the internal memory and how to recall the stored
set-up information and change it.
Chapter9 Saving and Loading the Data from a Floppy Disk
Describes how to save data such as set-up information, measured/computed results and screen
image to a floppy disk, load the saved data, format a floppy disk and delete data.
Chapter10 Using Other Functions
Describes how to output measured data to a plotter, input/output the reference signal, output
monitor signals, initialize the set-up information, calibrate the instrument, set the screen contrast
and set the touch key sound.
Chapter11 Troubleshooting and Maintenance
Describes corrective actions to be taken in case of problems and their causes, describes error
messages, how to use the error logging and self-test functions, adjust the time base, carry out the
performance test and reset the circuit breaker.
Chapter12 Specifications
Describes the specifications of the instrument.
Index
Describes important terms.
IM 704210-01E
5
Notations and Symbols Used in this Manual
Procedure
Explanation
Unit
k :1000 (e.g. 100 kHz)
K :1024 (e.g. 640 KB (floppy disk memory capacity))
Symbols Used
The following symbols are used in this User’s Manual.
To avoid injury or death of personnel, or damage to the instrument, the
operator must refer to the User’s Manual. In the User’s Manual, these
symbols appear on the pages to which the operator must refer.
WARNING
CAUTION
Note
Symbols used on pages where description of operation is given
The following symbols are used in chapters 3 to 11, to classify descriptions.
Procedure
Explanation
Describes precautions that should be observed to prevent the danger of
serious injury or death to the user.
Describes precautions that should be observed to prevent the danger of
minor or moderate injury to the user, or the damage to the property.
Provides information that is important for proper operation of the
instrument.
Describes keys to be used and operating procedure. With some operating
procedures, it is not necessary to carry out the steps according to the order
in which they are described.
Gives a detailed description of settings and restrictions regarding
operations. No detailed description is given for the function. For a
detailed description of the function, refer to Chapter 1.
6
IM 704210-01E
Contents
Foreword ........................................................................................................................................................................................ 1
Checking the Contents of the Package .......................................................................................................................... 2
Safety Precautions ................................................................................................................................................................... 4
Structure of the Manual .......................................................................................................................................................... 5
Notations and Symbols Used in this Manual ............................................................................................................... 6
Chapter 1 Functions
1.1 System Configuration and Block Diagram.........................................................................................................1-1
1.2 Measuring Principles and Sampling Mode......................................................................................................... 1-2
1.3 Measurement Functions (Measurement Items) .................................................................................................. 1-3
Period, Time Interval ............................................................................................................................................................... 1-3
Pulse Width, Phase Difference, Duty Ratio ............................................................................................................................. 1-4
1.4 Computation ....................................................................................................................................................... 1-5
Readout Function ..................................................................................................................................................................... 1-5
Calculation, Statistical Computation Items ............................................................................................................................. 1-6
1.5 Setting the Acquisition Conditions for Input Signal to be Measured .................................................................1-8
Input Coupling, Input Impedance, Measurement Block .......................................................................................................... 1-8
Trigger Mode/Trigger Level, Gate .......................................................................................................................................... 1-9
Sample Size (Number of Events), Sampling Interval, Arming, Arming Delay ..................................................................... 1-10
Inhibit ......................................................................................................................................................................................1-11
1.6 Displaying the Measured/Computed Data........................................................................................................ 1-12
Histogram Display, Multi-window .........................................................................................................................................1-12
Panorama Display, Histogram Data Addition, Time Variation Display ................................................................................ 1-13
List Display, Statistics Display ...............................................................................................................................................1-14
1.7 Other Functions
External Signal Input/Output (Rear Panel), Communications, Storing and Recalling of Set-up Information, Saving and
Loading Data from a Floppy Disk, Auto Loading of Set-up Information, Plotter Output, Initialization of Set-up
Information, Calibration .................................................................................................................................................. 1-16
Numeric Value Setting, Contrast, Touch-key Sound, Error Logging, Self-test ..................................................................... 1-17
1
2
3
4
5
6
7
8
9
Chapter 2 Name and Use of Each Part
2.1 Front Panel.......................................................................................................................................................... 2-1
2.2 Rear Panel ........................................................................................................................................................... 2-2
Chapter 3 Before Starting Measurement
3.1 Usage Precautions .............................................................................................................................................. 3-1
3.2 Installing the Instrument .....................................................................................................................................3-2
3.3 Connecting the Power Cord................................................................................................................................ 3-4
3.4 Turning the Power Switch ON/OFF ...................................................................................................................3-5
3.5 Connecting the Cables/Probes ............................................................................................................................3-6
3-6 Compensating a Probe (Carrying Out Phase Correction)................................................................................... 3-7
3.7 Setting the Date and Time .................................................................................................................................. 3-9
10
11
12
Index
IM 704210-01E
7
Contents
Chapter 4 Common Operations
4.1 Starting/Stopping Acquisition of a Measuring Input Signal .............................................................................. 4-1
4.2 Setting Numerical Values ...................................................................................................................................4-2
Chapter 5 Setting the Sampling Mode and Measurement Function (Item)
5.1 Selecting the Sampling Mode .............................................................................................................................5-1
5.2 Setting Period Measurement............................................................................................................................... 5-2
5.3 Setting Time Interval Measurement ................................................................................................................... 5-4
5.4 Setting Pulse Width Measurement .....................................................................................................................5-6
5.5 Setting Phase Difference Measurement.............................................................................................................. 5-8
5.6 Setting Duty Ratio Measurement .....................................................................................................................5-10
Chapter 6 Setting the Acquisition Conditions for Input Signal to be Measured
6.1 Setting the Input Coupling, Input Impedance, Trigger Mode and Trigger Level .............................................. 6-1
6.2 Setting the Gate Type, Sample Size and Sampling Interval ...............................................................................6-3
6.3 Setting the Arming Source, Slope and Delay Types .......................................................................................... 6-6
6.4 Setting the Inhibit Function ................................................................................................................................6-9
Chapter 7 Displaying the Measured/Computed Data
7.1 Setting the Histogram Display Function and Reading the Data (Readout) ........................................................7-1
7.2 Using the Multi-window Function ..................................................................................................................... 7-5
7.3 Using the Panorama Display Function ...............................................................................................................7-9
7.4 Carrying out Histogram Data Addition ............................................................................................................ 7-11
7.5 Setting the Time Variation Display Function and Reading the Data (Readout) .............................................. 7-13
7.6 Selecting the List Display Function and Displaying the Data ..........................................................................7-17
7.7 Selecting the Statistics Display Function and Reading the Statistic Data ........................................................7-19
7.8 Selecting the Histogram Display Function and Displaying the Statistic Data ................................................. 7-21
Chapter 8 Storing and Recalling the Set-up Information from the Internal Memory
8.1 Storing the Set-up Information in the Internal Memory .....................................................................................8-1
8.2 Recalling the Set-up Information from the Internal Memory ............................................................................ 8-2
Chapter 9 Saving and Loading the Data from a Floppy Disk
9.1 Points to Note during Use of the Floppy Disk Drive .........................................................................................9-1
9.2 Formatting a Floppy Disk ...................................................................................................................................9-2
9.3 Saving, Loading and Auto Loading the Set-up Information .............................................................................. 9-4
9.4 Saving and Loading the Measured and Computed Data .................................................................................... 9-7
9.5 Saving the Screen Image Data ..........................................................................................................................9-10
9.6 Auto Saving the Screen Image Data .................................................................................................................9-12
9.7 Deleting Saved Data .........................................................................................................................................9-13
Chapter 10 Using Other Functions
10.1 Outputting Data to a Plotter .............................................................................................................................. 10-1
10.2 Inputting and Outputting the Reference Signal ................................................................................................10-5
10.3 Outputting the Monitor Signal.......................................................................................................................... 10-7
10.4 Initializing the Set-up Information ...................................................................................................................10-8
10.5 Calibrating the Instrument ..............................................................................................................................10-10
10.6 Setting the Screen Contrast ............................................................................................................................ 10-11
10.7 Turning the Touch-key Sound ON/OFF......................................................................................................... 10-12
8
IM 704210-01E
Chapter 11 Troubleshooting and Maintenance
11.1 Troubleshooting................................................................................................................................................11-1
11.2 Messages...........................................................................................................................................................11-2
11.3 Using the Error Logging Function ................................................................................................................... 11-4
11.4 Executing the Self-test ...................................................................................................................................... 11-5
11.5 Adjusting the Time Base .................................................................................................................................. 11-8
11.6 Carrying out the Performance Test................................................................................................................... 11-9
11.7 Circuit Breaker ............................................................................................................................................... 11-19
Chapter 12 Specifications
12.1 Measuring Inputs and Trigger .......................................................................................................................... 12-1
12.2 Measurement Functions (Measurement Items) ................................................................................................ 12-2
12.3 Gate, Arming, Inhibit ....................................................................................................................................... 12-4
12.4 Display .............................................................................................................................................................. 12-5
12.5 Inputs/Outputs (Rear Panel) ............................................................................................................................. 12-7
12.6 GP-IB Interface ................................................................................................................................................ 12-8
12.7 Time Base .........................................................................................................................................................12-8
12.8 Internal Memory Function ................................................................................................................................ 12-8
12.9 Built-in Floppy Disk Drive............................................................................................................................... 12-8
12.10 General Specifications ......................................................................................................................................12-9
12.11 External Dimensions ...................................................................................................................................... 12-10
Index
Contents
1
2
3
4
5
6
7
8
9
10
11
12
Index
IM 704210-01E
9
1.1 System Configuration and Block Diagram
System Configuration
HP-GL compatible plotter
• Hard copy
• Set-up information list
Inhibit input
External arming input (the terminal
is shared with external gate input)
Reference input
Block Diagram
IN
Ach IN
Bch IN
10MHz
10MHz
Amplifier
Amplifier
Reference
Reference
OUT
Ach Monitor
OUT
Bch Monitor
OUT
EXT ARM IN
INHIBIT IN
10MHz-TCXO
Reference
Clock
Input
Trigger
DAC
Input
Trigger
DAC
External Arming Signal
Inhibit Signal
Monitor output
Reference output
Comparator
Signal
Comparator
Multiplexer
PLL
Clock
Generator
Clock
Measuring
Controller
&
Fractional
Pulse
Generator
Input signal
Object to be
measured
Saving and loading of
data from a floppy disk
Time Measuring Unit 1
T/V
Converter
T/V
Converter
Time Measuring Unit 2
T/V
Converter
T/V
Converter
Counter
Generator
Counter
Generator
Personal computer
• Remote control
• Data collection/analysis
Communication
Contoroller
&
Data
Contoroller
Acquisition BUS
&
Data
Memory
Acquisition
Memory 1
Memory
Acquisition
Memory 2
CPU BUS
CPU
LCD
&
Touch Panel
GP-IB
FDD
1
Functions
IM 704210-01E
Signal Flow
The signal input to the input terminal (Ach IN, Bch IN) is converted into a low-impedance signal
by the input amplifier. It is then sent to the comparator, where it is converted to a binary signal.
At the same time, the signal from the input amplifier is output as a monitor signal via the output
terminal (Ach Monitor OUT, Bch Monitor OUT).
The signal multiplexer selects the binary signal according to the selected measurement function
(item), then the signal is input to the measuring controller. The measuring controller controls
measurement and creates fractional pulse according to the external arming signal and inhibit
signal. The width of the fractional pulse is measured, with a resolution of 100 ps, by the T/V
converter of the time measuring unit (1, 2), and then compared with the value on the digital
counter, to provide measured data. With continuous measurement, two time measuring units (1,
2) are activated alternately.
In time stamp mode (see the following page), both measured value and time stamp data (elapsed
time) are acquired in each acquisition memory (1, 2). In hardware histogram mode (see the
following page), the frequency of each measured value (i.e. number of the same measured values)
is acquired in each acquisition memory. The acquired data is then sent via the memory controller
to a CPU, where it is used for statistical computation or displayed on the LCD.
Either the signal from the internal crystal oscillator (compensated against temperature drift) or an
external reference signal (input to the Reference IN terminal) can be used as the reference clock.
In either case, the reference clock is output through the 10-MHz band pass filter to the Reference
OUT terminal.
1-1
1.2 Measuring Principles and Sampling Mode
Measuring Principles
Time shorter than the period of the reference clock is called fractional time. In general, since the
signal to be measured is not synchronized with the reference clock, fractional time exists at both
beginning and end of measurement. This instrument generates a fractional pulse comprised of the
fractional time and the time equivalent to one cycle of the reference clock.
With the pulse width of the signal to be measured, period of the reference clock and time span of
each fractional pulse assumed to be T, t
multiplication of the period of the reference clock (N • t
and Tb) as shown below.
, Ta and Tb respectively, T can be separated into
0
) and period of each fractional pulse (T
0
a
T = N • t
With this instrument, T
+ (Ta – Tb)
0
and Tb, the time of fractional pulses generated at the beginning and end
a
of measurement, are converted into a voltage value, which is then converted into a digital value
by a 8-bit A/D converter. This enables measurement of the time of fractional pulse, with time
resolution of 100 ps per 1 LSB. T is calculated by substituting the measured time of each
fractional pulse for T
Signal to be measured
Reference clock
Fractional pulse
Time-voltage conversion
and Tb of the above formula.
a
12
T
a
V =k·T
aa
A/D conversion A/D conversion
T =N·t + (T –T )
k: A/D conversion factor
T
t
0
0
Sampling Mode ≡For operating procedure, refer to 5.1≡
Two sampling modes are available: time stamp mode and hardware histogram mode. The
sampling method (acquisition method of measured data) and display format (display method)
differ depending on the sampling mode. For a detailed description of display format, refer to 1.6,
“Displaying the Measured/Computed Data”.
N
T
b
V =k·T
b b
b
a
1-2
Time stamp mode
Measured values and their time stamps (i.e. the time on which measurement is taken) are acquired
into the acquisition memory, and used as time-series data. The maximum sample size (i.e. the
maximum allowable number of data items to be acquired) is 32,000, though it varies depending
on the measurement function (refer to section 1.3). The measured values can be displayed in four
formats (histogram, list (measured values and time stamp), time variation and statistic values.
* Time stamp is expressed as the elapsed time between that when arming is activated (refer to
section 1.5) and when measurement for one sample is completed.
Hardware histogram mode
The measured value and its occurrence frequency are acquired into the acquisition memory. The
maximum sample size (i.e. the maximum allowable number of data items to be acquired) is
99,999,999. The measured values can be displayed in three formats (histogram, list (measured
values and frequency) and statistic values.).
IM 704210-01E
1.3 Measurement Functions (Measurement Items)
Period ≡For operating procedure, refer to 5.2≡
The time from a rising (or falling) edge to the next rising (or falling) edge of the input signal is
measured. Either rising or falling edge can be selected, and channel A or B can be selected for
measurement.
Example (rising slope is selected)
Measured Measured Measured
CH A/
CH B
Time Interval ≡For operating procedure, refer to 5.3≡
The time interval between the signal input to channel A and that input to channel B is measured.
The following two types of time interval can be measured.
A-to-B interval
The time interval between an edge of the signal input to channel A and the first edge of the signal
input to channel B is measured. Various combinations of edges can be selected as follows. For a
description of combinations of slopes, refer to 5.3, “Setting Time Interval Measurement”.
1
Functions
Example (Both channels A and B: rise)
AB
Measured
Measured
CH A
CH B
A-to-B-to-A interval
The time interval between an edge of the signal input to channel A and the first edge of the signal
input to channel B, and the time interval between an edge of the signal input to channel B and the
subsequent edge of the signal input to channel A are measured. For a description of combinations
of slopes, refer to 5.3, “Setting Time Interval Measurement”.
Example (All three edges: rise)
ABA
Measured
CH A
Example (Channel A: both rise and fall, channel B: rise)
A
B
Measured Measured Measured
CH A
CH B
MeasuredMeasured Measured
IM 704210-01E
CH B
1-3
1.3 Measurement Functions (Measurement Items)
Pulse Width ≡For operating procedure, refer to 5.4≡
The time between a rising (or falling) edge and the next falling (or rising) edge of the input signal
is measured. For selection of combinations of polarity, refer to 5.4, “Setting Pulse Width
Measurement”. A special combination of polarity, in which a time constant T (see section 1.4) is
specified to carry out measurement only when the period of the pulse is within the specified time
range (22T±0.5T). This combination is called “22T”. For measurement of pulse width, channel
A or B can be selected.
Example (positive: rising to falling)
Measured Measured Measured Measured
CH A/
CH B
Example (22T)
22T
Measured when
within 22T ±0.5T
CH A/
CH B
Not measured when
not within 22T ±0.5T
Measured when
within 22T ±0.5T
Phase Difference ≡For operating procedure, refer to 5.5≡
The time between an edge of the signal input to channel A and an edge of the signal input to
channel B is measured, and the measured value is then expressed in phase difference (deg) in
relation to the period of the signal input to channel A which is set as 360 degrees. This
measurement is available only when time stamp mode is selected as the sampling mode. For a
description of combinations of slopes, refer to 5.5, “Setting Phase Difference Measurement”.
Example (Both channels A and B: rise)
AB
Duty Ratio
Measuredtp1
Measuredt1 Measuredt2
Measuredt
CH A
CH B
1[deg]=
≡≡
≡For operating procedure, refer to 5.6
≡≡
The ratio of the time between a rising (or falling) edge and the next falling (or rising) edge in
relation to one period of the input signal is measured. This measurement is available only when
time stamp mode is selected as the sampling mode. For measurement of duty ratio, channel A or
B can be selected.
t
t
p2
p1
× 360 2[deg]=
1
Phase difference
t
p2
× 360Phase difference
t
2
≡≡
≡
≡≡
1-4
Example (rising to falling)
CH A/
CH B
Measuredt
Duty ratio
p1
Measuredt
1
[
%
]=
t
p1
t
1
Measuredt
1
× 100
p2
Duty ratio
Measuredt
2[ ]=
%
2
t
p2
t
× 100
2
IM 704210-01E
1.4 Computation
Readout Function ≡For operating procedure, refer to 7.1 and 7.5≡
If histogram or time variation display format is selected (see 1.6), two markers (X1 and X2) will
be displayed. This enables reading out of the coordinates of each cross-point of the markers and
the histogram (or time variation). In addition, selecting a calculation area (see the following
page) enables statistical computation for the area enclosed by the markers.
Histogram display format
The meaning of each value displayed at the bottom of the screen is given below.
X1: X-axis coordinate of X1 marker (measured value)
Y1: Y-axis coordinate of X1 marker (frequency of X1)
X2: X-axis coordinate of X2 marker (measured value)
Y2: Y-axis coordinate of X2 marker (frequency of X2)
N:
• WINDOW selected as calculation area: Total number of samples within the window
• MARKER selected as calculation area: Number of samples present within the area enclosed
by X1 and X2 markers
Window
X1 marker
X2 Marker
1
Functions
Time variation display format
The meaning of each value displayed at the bottom of the screen is given below.
X1: X-axis coordinate of X1 marker (time stamp)
X2: X-axis coordinate of X2 marker (time stamp)
∆X: X2 - X1
Y1: Y-axis coordinate of X1 marker (measured value)
Y2: Y-axis coordinate of X2 marker (measured value)
∆Y: |Y2 – Y1|
X1 marker
X2 Marker
IM 704210-01E
1-5
1.4 Computation
Calculation ≡For operating procedure, refer to 7.1 and 7.7≡
The following functions are available to select/set parameters required for statistical computation.
Selecting the calculation area
This function allows the user to select whether to carry out statistical computation using the
measured values present in the entire window of a histogram or using those present within the
area enclosed by the markers.
Setting the constant
This function allows the user to set the constant T to be used for calculation of jitter 1 (σ/T) or
jitter 2 (|AVE - X
| / T) or the one to be used for measurement of pulse width (22T).
center
Statistical Computation Items ≡For operating procedure, refer to 7.1 and 7.8≡
Statistical computation can be carried out using measured values. Computation results can be
displayed if histogram or statistic display format is selected (see 1.6). The entire area of a
histogram (i.e. entire window area) or the area enclosed by the X1 and X2 markers can be used as
the calculation area. The formula may differ depending on the sampling mode.
Time stamp mode
In the following formulas, “n” indicates the number of samples and X
value for each sample.
indicates the measured
i
• Maximum value (MAX)
Indicates the largest value among the measured values.
MAX=[Xi]
max
• Minimum value (MIN)
Indicates the smallest value among the measured values.
MIN= [Xi]
min
• Average value (AVE)
Calculates the average of the measured values.
n
AVE =
• Standard deviation (
1
X
Σ
i
n
i=1
σσ
σ)
σσ
Calculates the standard deviation of the measured values. Standard deviation indicates degree of
dispersion.
n
σ =
1
n
Σ (
i=1
Xi– AVE)
2
• Peak to peak (P-P)
Calculates the difference between the maximum and minimum values.
1-6
P–P= MAX– MIN
•Flutter (
σσ
σ/AVE)
σσ
Calculates flutter. Flutter indicates degree of dispersion in percentage in relation to the average
value.
σ / AVE =
σ
AVE
× 100(%)
IM 704210-01E
1.4 Computation
Hardware histogram mode
In the following formulas, “n” indicates the number of bins of a histogram. “Bin” refers to each
bar of the histogram and indicates frequency of the same measured data. X
indicates the class
i
value of each bin. The width of bins varies depending on the specified span of X-axis, and may
be as small as 100 ps. In this case, X
indicates the measured value. For details, refer to 1.6.
i
• Maximum value (MAX)
Indicates the largest value among the class values.
1
Functions
MAX=[Xi]
max
• Minimum value (MIN)
Indicates the smallest value among the class values.
MIN= [Xi]
min
• Average value (AVE)
Calculates the average value of the histogram. Pi indicates relative frequency (*).
n
Σ
i=1
Xi× P
i
AVE =
*Pi can be calculated using the formula “Pi = Ni / N” when the total number of samples to be
used for statistical computation is N and frequency (number of samples) of a bin is N
• Standard deviation (
σσ
σ)
σσ
Calculates the standard deviation of the histogram. Standard deviation indicates degree of
dispersion. P
indicates relative frequency.
i
n
1
=
σ
Xi– AVE)2× P
Σ (
n
i=1
i
• Peak to peak (P-P)
Calculates the difference between the maximum and minimum values.
.
i
P–P= MAX– MIN
• Flutter (
σσ
σ/AVE)
σσ
Calculates flutter of the histogram. Flutter indicates degree of dispersion in percentage in relation
to the average value.
σ
AVE
× 100(%)
• Jitter 1 (
σ / AVE =
σσ
σ/T)
σσ
Constant T is used to calculate jitter 1 of the histogram. Jitter 1 indicates degree of dispersion in
percentage in relation to constant T.
σ /T=
σ
T
× 100(%)
• Jitter 2 (MELE, Maximum Effect Length Error)
Constant T is used to calculate jitter 2 of the histogram. X
X-axis in the window. For details, refer to 1.6. X
means the value around which measured
center
values are distributed. Jitter 2 indicates deviation of the average value from X
indicates the center value of
center
center
in percentage
in relation with constant T.
ME LE=
| AVE–X
T
CENTER
|
× 100(%)
IM 704210-01E
1-7
1.5 Setting the Acquisition Conditions for Input Signal to be Measured
Input Coupling ≡For operating procedure, refer to 6.1≡
When you want to measure only (AC components) of the input signal or only the signal
overlapping with the specified DC voltage, measurement can be facilitated if DC components are
removed from the signal. In other cases, you may want to measure all the AC and DC
components of the input signal. In these cases, an appropriate input coupling can be selected.
The following input coupling methods are available.
AC coupling
The signal is input to the amplifier through a capacitor. AC coupling is used to measure only the
amplitude of the input signal by removing DC components or measure only the signal which
overlaps the specified DC voltage.
Input terminal
DC coupling
The signal is input directly to the amplifier. DC coupling is used to measure all the AC and DC
components of the input signal
Input terminal
Input
amplifier
Input
amplifier
Input Impedance ≡For operating procedure, refer to 6.1≡
To reduce attenuation or distortion of the signal to be measured, an input impedance can be
selected from 50 Ω and 1 MΩ to match the output impedance of the source of the signal.
Measurement Block
The instrument carries out a series of processes, from measurement to data processing and
display, repeatedly. The minimum block of each series of processes is called “measurement
block”. When the number of samples (number of data items) for each series is assumed to be N,
each series of processes (measurement, processing and display of N samples) is called “one-block
measurement”.
Samples S1, S2, S3 to SN within the measurement block are measured as shown below by
sampling pulses P1, P2, P3 to PN generated at the specified sampling intervals. (For setting the
sampling intervals, refer to page 1-10.)
1-8
Input signal
Sampling
pulse
When the period of the input signal is longer than the sampling interval
1 block 1 block
Measurement block Measurement block
S1 S2 S3 SN
P1 P2 P3 P4 P2 P3 P4
Sampling interval
Data processing,
display
Preparation
for measurement
S1 S2 S3
IM 704210-01E
Half of
the amplitude
Half of
the amplitude
Amplitude
(Input signal)
Trigger level is set
Measurement block
A trigger is caused.
Trigger level
1.5 Setting the Acquisition Conditions for Input Signal to be Measured
When the period of the input signal is shorter than the sampling interval
Preparation
for measurement
Input signal
Sampling
pulse
1 block
Measurement block
S1
S2 S3 S4 SN S1 S2 S3 S4
P1 P2 P3 P4 P2 P3 P4
Sampling interval
Data processing,
display
Trigger Mode/Trigger Level ≡For operating procedure, refer to 6.1≡
The instrument allows the user to specify the level at which measurement is to be carried out.
This level is called trigger level.
Single auto trigger
The center level of the amplitude of the input signal is set as the trigger level automatically during
the cycle just before the first measurement block. This trigger level will be used for all the
subsequent measurement blocks.
Repeat auto trigger
The center level of the amplitude of the input signal is set as the trigger level automatically during
the cycle just before each measurement block. Unlike the single auto trigger, the trigger level is
set for each measurement block.
1 block
Measurement block
1
Functions
P1PN
Manual trigger
The level set using the rotary knob or front panel keys is set as the trigger level.
Gate ≡For operating procedure, refer to 6.2≡
The instrument allows the user to specify the size of measurement block. Measurement can be
carried out as many as the specified number of events or during the specified gating time (i.e.
while the gate is open). Three types of gate are available.
Event gate
Each sampling is called an event. For instance, one measurement of the period of the input signal
is counted as one event. Up to 32,000 events (16,000 events for duty ratio/phase difference
measurement) can be set in the case of time stamp mode and up to 99,999,999 events can be set in
the case of hardware histogram mode, within 320 seconds following the arming (see the following
page).
Time gate
Gating time of up to 10 seconds can be set. However, the maximum number of events allowed
for the sampling mode must not be exceeded.
External gate
The external arming input terminal (EXT ARM IN) is used to open/close the gate(See the
IM 704210-01E
following page). The gate can be opened for up to 320 seconds, as long as the maximum number
of events allowed for the sampling mode is not exceeded. In addition, it is possible to select
whether to open the gate using the positive or negative edge of the external arming signal.
1-9
1.5 Setting the Acquisition Conditions for Input Signal to be Measured
Sample Size (Number of Events)≡For operating procedure, refer to 6.2≡
The allowable number of measured data items to be acquired into the acquisition memory is
called sample size. This setting is required if event gate is selected. Up to 32,000 events (16,000
events for duty ratio/phase difference measurement) can be set in the case of time stamp mode
and up to 99,999,999 events can be set in the case of hardware histogram mode.
Sampling Interval ≡For operating procedure, refer to 6.2≡
The sampling interval is the interval at which a sample is acquired. A sampling pulse (see
“Measurement Block”) is generated at sampling intervals, and measurement is carried out when
the input signal satisfies the trigger conditions (trigger level, slope etc.) after the sampling pulse.
The sampling interval can be set between approximately 71 ns (reciprocal of the maximum
sampling rate 14 MS/s) and 4 ms in the case of time stamp mode. For hardware histogram mode,
the sampling interval is fixed at approximately 71 ns.
Arming ≡For operating procedure, refer to 6.3≡
Measurement of a measurement block is started when arming is activated. Two arming methods
are available: auto arming in which measurement starts immediately when the START key is
pressed or START communication command is issued, and external arming in which
measurement starts when the external arming signal is input.
Auto arming
Arming is activated automatically after the START key is pressed or START communication
command is issued. For auto arming, the internal arming signal is used.
External arming
Arming is activated when the external arming signal is input to the EXT ARM IN terminal
following start of measurement. It is possible to select whether to activate arming using the rising
or falling edge of the external arming signal.
ArmingStart of measurement
Measurement
block
Arming Delay ≡For operating procedure, refer to 6.3≡
With the external arming method, it is possible to delay measurement until a certain time elapses
or the specified number of events occur following activation of arming. The following two
arming delay methods are available.
Time delay
Measurement starts after the specified time (up to 1 second) has elapsed.
Event delay
Measurement starts after the specified number of events (up to 30,000) have occurred.
1-10
IM 704210-01E
1.5 Setting the Acquisition Conditions for Input Signal to be Measured
Inhibit ≡For operating procedure, refer to 6.4≡
Measurement can be inhibited by inputting the inhibit signal to the INHIBIT IN terminal. This is
also possible while the gate is open or during measurement following the arming delay.
Measurement can be inhibited for up to 320 seconds. In addition, it is possible to select whether
to inhibit measurement using the positive or negative edge of the inhibit signal.
Relation between the inhibit signal and gating
Mesurement is inhibited.
Inhibit signal
1
Functions
Gate
Input signal
Gate is open.
S1 S2 S3
Start of measurement
Not counted as an
event during inhibition
of measurement.
Not measured.
S4 S5
Measurement is resumed.
Relation between the inhibit signal and gating/external arming
Inhibit signal
Gate is open.
Gate
External arming
Input signal
S1 S2 S3
Start of measurement
Mesurement is inhibited.
Not measured.
S4 S5
Measurement is resumed.
Not counted as an
event during inhibition
of measurement.
Relation between the inhibit signal and gating/external arming/arming delay
Mesurement is inhibited.
Inhibit signal
Gate is open.
Gate
Arming delay
External arming
Not measured.
Input signal
S1 S2 S3
Start of measurement
Not counted as an
event during inhibition
of measurement.
S4 S5
Measurement
is resumed.
IM 704210-01E
1-11
1.6 Displaying the Measured/Computed Data
Histogram Display ≡For operating procedure, refer to 7.1≡
A histogram of measured data is displayed for each measurement block to allow the user to
observe data distribution. Although period, phase difference or duty ratio can be set for the
X-axis and frequency for the Y-axis manually, they can be set automatically using the auto
scaling function. The following items can be set manually.
•Center value of X-axis
• Span of X-axis
• Y-axis scale (linear or logarithmic scale)
• Maximum value of Y-axis
• Space between the center values of X-axis (This setting is required when you are using the
multi-window function in hardware histogram mode.) For a description of the multi-window
function, refer to “Multi-window” on this page.
Histogram displayed when time stamp mode is selected or when hardware
histogram mode is selected and only one window is used (i.e. multi-window function
is OFF)
A histogram is displayed according to the settings made for the above items.
If a class has a time span, for instance, if the minimum and maximum values in the class are
505 ns and 515 ns, respectively, 510 ns will be treated as the class value, and samples in this class
are all considered as 510 ns. If the measured values in this class are all the same, they will be
treated as the class value. Each value given along the X-axis as shown below indicates either the
class value or displacement. A histogram is created as the number of samples in each class are
accumulated.
Y-axis scale (logarithmic scale is used in this example)
Maximum value of Y-axis
Y-axis
(frequency)
Class
Left-end value of X-axis
(negative displacement from
the center value of X-axis)
Span of X-axis (2 ns in this example)
Center value of X-axis
(Class value of
the center class)
X-axis (time)
Histogram displayed when hardware histogram mode is selected and more than two
windows are used (i.e. multi-window function is ON)
Refer to “Multi-window” and “Panorama Display” given in this section.
Multi-window ≡For operating procedure, refer to 7.2≡
If data for a measurement block is distributed along more than two center values of X-axis, more
than two histograms will be created. Although all the histograms can be displayed within one
window, it is possible to set more than two windows to allow each histogram to be displayed in its
own window. This function is called the multi-window function. Up to 16 windows can be set.
An example of a window is shown in “Panorama Display” on the following page.
Using the multi-window function in conjunction with the panorama display function enables the
user to recognize easily which histogram is currently displayed.
Each bar is called a bin.
Right-end value of X-axis
(positive displacement from
the center value of X-axis)
1-12
IM 704210-01E
1.6 Displaying the Measured/Computed Data
Panorama Display ≡For operating procedure, refer to 7.3≡
A panorama bar is displayed at the top of the screen during hardware histogram mode. The
panorama bar shows all the histograms of measured data. The histogram currently displayed in
the window is enclosed by “ marks,” so that the user can easily understand which histogram
is currently displayed.
Window 1 Window 2 Window 3 Window 4
Panorama bar
1
Functions
Maximum value of Y-axis
(frequency)
Left-end value of X-axis
(negative displacement from
the center value of X-axis)
Y-axis
Left-end value of
the panorama bar
Center value of X-axis
mark
Right-end value of
the panorama bar
(Class value of
the center class)
Span of X-axis
(40 ns in this example)
X-axis (time)
Right-end value of X-axis
from the center value of X-axis)
Histogram Data Addition ≡For operating procedure, refer to 7.4≡
It is possible to add the histogram of each window specified using the SIZE touch key during
multi-window setting, and display the resulting histogram in a single window. The frequency of
the bin located at the center value of X-axis of each histogram is added, and then the frequency of
each bin located on the left and right of that bin is similarly added. This enables comparison of
data distribution between histograms and global statistical computation of all the histograms.
Histogram for
window 1
Histogram for
window 2
Resulting histogram
Window
(Window 1 is displayed
in this example)
(positive displacement
+
=
Time Variation Display ≡For operating procedure, refer to 7.5≡
During time stamp mode, measured values and time stamps are treated as data and acquired in the
acquisition memory. The time variation display function uses this time-series data to display
variation of measured values in relation to the elapsed time following the arming.
Span of Y-axis
(20 ns in this example)
(positive displacement from the
(measured value)
Y-axis
Center value
of Y-axis
IM 704210-01E
center value of Y-axis)
(negative displacement from the
center value of Y-axis)
Minimum value
of X-axis
X-axis (elapsed time)
Maximum value of X-axis
(positive displacement from
the minimum value of X-axis)
(Span: 400 µs in this example)
1-13
1.6 Displaying the Measured/Computed Data
List Display ≡For operating procedure, refer to 7.6≡
A list of measured values is displayed. This function enables the user to jump to the top or
bottom data in the list, and set data numbers to locate/display the measured value of the desired
data number. The contents of the list vary according to the selected sampling mode.
Time stamp mode
A list of time stamps and their measured values for the number of events/time range specified in
gating setting (see 1.5) is displayed.
Time stamp Measured value
Data number
1
2
3
4
5
6
7
8
9
10
Hardware histogram mode
A list of measured values (class values of histogram) and their frequency within the span of Xaxis specified in histogram display setting is displayed.
The data number of the
highlighted data is displayed.
Class value Frequency
Data number
74
75
76
77
78
79
80
81
82
83
The data number of the
highlighted data is displayed.
Statistics Display ≡For operating procedure, refer to 7.7 and 7.8≡
A list of statistic values is displayed. For statistical computation items, computation and
computation area, refer to 1.4, “Computation”. The contents of the list vary according to the
selected sampling mode.
Time stamp mode
No computation is carried out for jitter 1 (σ/T) and jitter 2 (MELE), so no results are displayed.
Statistical computation item Statistic value Statistical computation area
(The entire window is used for statistical
computation in this example. “MARKER”
will be displayed if the area enclosed by
the markers is used for statistical computation.)
1-14
No computation is carried out for jitter 1 and jitter 2.
IM 704210-01E
Hardware histogram mode
A bar graph indicating the standard deviation (σ) is displayed below the list. The bar graph range
(maximum value) can be selected (see below).
Statistical computation item Statistic value
Bar graph range (maximum value)
Statistics values during histogram display
The statistical computation area and items (two items) are displayed while a histogram is
displayed. It is possible to select statistical computation items to be displayed.
1.6 Displaying the Measured/Computed Data
Statistical computation area
(The area enclosed by the markers
is used for statistical computation
in this example. “WINDOW” will be
displayed if the entire window is
used for statistical computation.)
Standard deviation (σ) is displayed in bar graph.
1
Functions
• Time stamp mode
Selected statistical
computation items
• Hardware histogram mode
Selects statistical computation items to be displayed.
(This menu is displayed when the STAT touch key
located at the bottom of the screen is pressed.)
Statistical computation area (The entire window is used
for statistical computation in this example. “MARKER”
will be displayed if the area enclosed by the markers is
used for statistical computation.)
Selects statistical computation items to be displayed.
(This menu is displayed when the STAT touch key located at
the bottom of the screen is pressed.)
IM 704210-01E
Selected statistical computation items
Statistical computation area
markers is used for statistical computation in this example.
“WINDOW” will be displayed if the entire window is used for
statistical computation.)
(The area enclosed by the
* “Touch key” is a key displayed on the LCD. Touching it with your finger will execute a certain
operation.
1-15
1.7 Other Functions
External Signal Input/Output (Rear Panel)
The following input and output terminals (BNC) are provided on the rear panel, to communicate
with external devices. For location of each terminal, refer to 2.2, “Rear Panel”.
Reference input terminal (REFERENCE IN)
Although the instrument has an internal reference clock to be used for measurements, it is
possible to input an external signal (10 MHz) to this terminal and use it as the reference clock.
Reference output terminal (REFERENCE OUT)
The internal reference clock or external reference clock can be sent through a 10-MHz band pass
filter and then output from this terminal.
Monitor output terminals (MONITOR OUT CHA, CHB)
Signals input to the input terminals can be output directly from these terminals. They can be used
for observation of a waveform during phase correction of a probe.
External arming input/inhibit input terminals (EXT ARM IN, INHIBIT IN)
These signals are used to control measurement functions of the instrument. For the function of
external arming or inhibit signal, refer to 1.5, “Setting the Acquisition Conditions for Input Signal
to be Measured”.
≡For operating procedure, refer to 10.2 and 10.3≡
Communications ≡Refer to the GP-IB Interface User’s Manual (IM704210-12E)≡
The instrument is equipped with a GP-IB interface as a standard feature. Use of this interface
enables transmission of measured data to a personal computer to analyze it, and enables control of
this instrument using an external controller.
Storing and Recalling of Set-up Information
Up to 10 sets of set-up information can be stored in the internal non-volatile memory. It is also
possible to recall the stored set-up information to set up the instrument. This function is useful
when you want to use the set-up information repeatedly.
Saving and Loading Data from a Floppy Disk
The instrument is equipped with a floppy disk drive. This enables the user to save set-up
information and measured data to a floppy disk or load from it, whenever it is required. In
addition, it is also possible to save the screen image data in TIFF format. This enables the user to
import the saved screen image data to a document created by a DTP software application, to
create a report.
≡For operating procedure, refer to Chapter 8≡
≡For operating procedure, refer to Chapter 9≡
Auto Loading of Set-up Information ≡For operating procedure, refer to 9.3≡
Turning ON the power after a floppy disk containing the set-up information is inserted into the
floppy disk drive will load the set-up information to the instrument automatically. This is useful
to restore the set-up information in the instrument.
Plotter Output ≡For operating procedure, refer to 10.1≡
Measured data can be output to an external plotter via the GP-IB interface.
Initialization of Set-up Information ≡For operating procedure, refer to 10.4≡
The set-up information can be reset to the factory settings (default settings).
Calibration ≡For operating procedure, refer to 10.5≡
Calibration of the offset voltage of each input amplifier and conversion factor of each T/V
converter can be carried out using the internal calibration signal.
1-16
IM 704210-01E
Numeric Value Setting ≡For operating procedure, refer to 4.2≡
A numerical value can be entered using the ten-key (displayed when the KEYBOARD key is
pressed) while a small ten-key icon is displayed on the left of the currently highlighted touch key.
This is useful when you need to set a value consisting of several digits. If a small icon is
displayed, a numerical value can be entered using the rotary knob.
Small rotary knob icon
Small ten-key icon
Contrast ≡For operating procedure, refer to 10.6≡
The contrast of the LCD display can be adjusted. Adjust it so that it suits the environment in
which the instrument is used.
Touch-key Sound ≡For operating procedure, refer to 10.7≡
A beeping sound is heard when a touch key is pressed (touched) or an error occurs. It is possible
to disable this beep.
1.7 Other Functions
1
Functions
Error Logging ≡For operating procedure, refer to 11.3≡
“!” mark appears in the upper right corner of the screen if a data error such as overflow of
measured data occurs or a communication error occurs. Error messages are recorded in the error
logging window, to enable the user to observe them later.
Self-test ≡For operating procedure, refer to 11.4≡
In case of a problem, a self-test can be carried out to enable the user to check the problem before
contacting YOKOGAWA. This function enables inspection of the memory, PC board and
display.
IM 704210-01E
1-17
2.1 Front Panel
Top menu keys
Displays the corresponding top menu.
• MODE key
Displays the sampling mode selection screen. (See 5.1.)
• FUNCTION key
Displays menus for setting/selecting the measurement function, input channel and slope. (See chapter 5.)
2
• DISPLAY key
Displays menus for setting/selecting the display format, window axis, markers, calculation. (See chapter 7.)
• SAMPLE key
Displays menus for setting/selecting the gate, sample size, sampling interval, arming and inhibit. (See chapters 6.2, 6.3 and 6.4.)
• INPUT key
Displays menus for setting/selecting the input coupling, input impedance, trigger mode and trigger level. (See chapter 6.1.)
• UTILITY key
Displays menus for setting/selecting initialization of set-up information, storing and recalling of data in the internal memory,
configuration (communication, contrast, date/time, touch key sound), self-test, saving and loading of data from a floppy disk, reference
clock, calibration and initialization of a floppy disk. Also displays the error logging window and version No. (ROM version). (See 3.7,
chapters 8,9, and 10, and 11.3 to 11.5.)
LCD display
(Touch screen)
Touch key
Press the area enclosed
by to make various
Rotary knob
Sets a numerical value, moves markers and
selects a file. (See 4.2, chapters 7 and 9.)
settings and selections.
100ps resolution 14MS/s
TIME INTERVAL ANALYZER
Arrow keys
Moves from one digit to
another digit during setting
of a numerical value. Also
MODE
used as a back space key
(<). (See 4.2.)
FUNCTION
SINGLE key
Carries out measurement
DISPLAY
SAMPLE
INPUT
UTILITY
POWER
SINGLE START STOP
COPY LOCAL
50 5Vrms
1M 40Vpk
REMOTE
CH
B
KEY
BOARD
CH
A
only once. (See 4.1.)
Measurement indicator
Lights up during acquisition
of measured data.
START/STOP key
Starts/stops continuous
measurement. (See 4.1.)
LOCAL key
Cancels remote control
(REMOTE indicator lights
up during remote control
mode). Refer to the GP-IB
Interface User’s Manual
(IM704210-12E).
COPY key
Saves the screen image data
to a floppy disk/outputs the
screen image data to an
external plotter.
Power switch
(See 3.4.)
Access indicator
Blinks while the floppy
disk drive is in use.
Eject button
Used to remove the
floppy disk.(See 9.1.)
Floppy disk drive
(See 9.6 and 10.1.)
KEYBOARD key
Displays a ten-key (only
when a ten-key icon is
displayed on the left of a
touch key).(See 4.2.)
CHA/CHB input indicator
Blinks while the signal is input and a trigger
is caused.
CHA/CHB input terminal
Connect the input signal cables to these terminals.
(See 3.5.)
Name and Use of Each Part
IM 704210-01E
2-1
2.2 Rear Panel
Adjustment hole for reference clock frequency
Used to adjust the time base. (See 11.5.)
Reference input terminal
The external reference clock is input to this terminal. (See 10.2.)
Reference output terminal
The reference clock is output from this terminal. (See 10.2.)
REF
ADJUST
REFERENCE
IN OUT
GP-IB ( IEEE488 )
WARNING
It is dangerous to operate this instrum
ent outside its environmental specificati
ons. Refer to manual.
(50 )10MHz 1Vp-p 10MHz 1Vp-p
CHA/CHB monitor output terminal
Input signals are output from these terminals. (See 10.3.)
MONITOR OUT
CH A CH B
(50 )
External arming input terminal (shared with the external
gating input)
(See 6.2 and 6.3.)
Inhibit input terminal
(See 6.4.)
CIRCUIT
EXT ARM INHIBIT
IN IN
BREAKER
250V AC 3A
Circuit breaker
( TTL ) ( TTL )
(See 11.7 for the
resetting method.)
Power cord connector
The power cord is connected
100 - 240V AC
125VA MAX 50/60Hz
to this connector. (See 3.3.)
Name plate
Refer to this name plate when
checking the contents of the
package. (See page 2.)
Vent
WARNING plate
holes
Safety Precautions. (See page 4.)
Usage Precautions. (See 3.1.)
GP-IB connector
Used to connect the instrument to an external device (e.g. personal computer).
Refer to the GP-IB Interface User’s Manual (IM704210-12E).
2-2
IM 704210-01E
3.1 Usage Precautions
Safety precautions
• Be sure to read through the safety precautions given on page 4 of this manual before starting to
use the instrument.
• Never remove the instrument’s casing. The unit contains extremely hazardous high-voltage
components. Consult your nearest Yokogawa representative (see listing on rear cover) if the
instrument requires maintenance or adjustment.
• If the instrument emits smoke or unusual odors, or in any way behaves abnormally immediately
turn OFF the power switch and unplug the power cord from the outlet. Then consult your
nearest Yokogawa representative for assistance.
• If the cooling fan stops during operation, the instrument will display the error message shown
below. When you see this message, turn OFF the power immediately. The fan (on the rear
panel) may be jammed; check for and remove any obstructions, then restart. If the same error
recurs, turn OFF the power and contact your nearest Yokogawa representative.
• Never rest any objects on the power cord. Keep the cord clear of hot objects at all times. When
unplugging the power cord, pull on the plug area - never pull on the cord itself. If the cord is
damaged, contact your dealer and obtain a replacement. (Quote the part number indicated on
page 2 of this manual.)
3
Before Starting Measurement
Handling Precautions
• Never place liquid-filled containers or other potentially damaging objects on top of the
instrument.
• Avoid subjecting the instrument to vibration and strong impacts, as these can cause hardware
damage. Be especially careful if the instrument is equipped with a floppy disk drive. Also note
that any impact to terminals or connecting cables may cause electrical noise to the output
signal.
• Always keep terminals clear of electrically charged objects. Electrostatic at the terminals may
cause internal damage.
• If you do not plan to use the instrument for an extended period, unplug the power cord.
• If you need to lift and move the instrument, first disconnect the power cord and connecting
cables. Lift and carry by the handle, as shown. The instrument weighs approximately 5kg.
IM 704210-01E
• Never touch the LCD (touch screen) with pointed objects. Contact with sharp objects may
cause damage.
• Never clean plastic parts with benzene or other such solvents, as these may cause discoloration.
To clean the case or panel, wipe lightly with a soft dry cloth.
3-1
Loading...