Page 1 Time Interval Analyzer IM 704510-01E 1st Edition...
Page 2: Product Registration
Product Registration Thank you for purchasing YOKOGAWA products. YOKOGAWA provides registered users with a variety of information and services. Please allow us to serve you best by completing the product registration form accessible from our homepage. http://www.yokogawa.com/tm/ PIM 103-01E...
Page 3 However, should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. • Copying or reproducing all or any part of the contents of this manual without the permission of Yokogawa Electric Corporation is strictly prohibited.
Page 4: Checking The Contents Of The Package
TA720 Check that the model name and suffix code given on the name plate on the rear panel match those on the order.
Page 5 Checking the Contents of the Package Optional Accessories (Sold Separately) The following optional accessories are sold separately. For information and ordering, contact your nearest YOKOGAWA dealer. Part Name Model/Part Number Minimum Q’ty Description BNC cable 366924 BNC-BNC, length: 1 m...
Page 6: Safety Precautions
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.
Page 7 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.
Page 8: Structure Of The Manual
Structure of the Manual This user’s manual consists of the following sections: Chapter 1 Names and Functions of Parts Describes the names of each part of the instrument and its function. For keys, references are given to sections (or pages) in the manual where operating procedures are explained. Chapter 2 Explanation of Functions Describes the measurement principles and functions of the instrument.
Page 9: Conventions Used In This Manual
Conventions Used in This Manual Unit Denotes “1000.” Example: 680 kHz K: Denotes “1024.” Example: 720 KB (Storage capacity of floppy disks) Safety Markings The following markings are used in this manual. Danger. Refer to corresponding location on the instrument. This symbol appears on dangerous locations on the instrument which require special instructions for proper handling or use.
Page 10: Table Of Contents
Statistical Calculation and Inter-Symbol Interference Analysis ........2-21 Other Functions ......................2-26 Chapter 3 Before Starting Measurements Handling Precautions ....................... 3-1 Installing the TA720 ......................3-3 Connecting to the Power ....................3-6 Turning ON/OFF the Power Switch .................. 3-7 Connecting Cables and Probes ..................3-8 Calibrating the Probe (Phase Correction) ..............
Page 11 Contents Chapter 6 Setting Measurement Conditions Setting the Gate ....................... 6-1 Setting the Sampling Interval ................... 6-4 Setting the Arming ......................6-5 Setting Inhibit ........................6-8 Setting the Block Sampling .................... 6-10 Setting the Input Coupling, Input Impedance, and Trigger ..........6-12 Adjusting the Phase during Time Interval Measurement ..........
Page 12 Gate Output ........................13-7 13.5 Monitor Output ....................... 13-8 13.6 Viewing the Setup Conditions and ROM Version of the TA720 ........13-9 13.7 Turning ON/OFF the Beep Sound, Click Sound, and Warning Display, and Setting LCD ............................13-10 Chapter 14 Troubleshooting and Maintenance 14.1...
Page 13: Chapter 1 Names And Functions Of Parts
Inhibit input terminal Used to select items on the soft key menu that appears Used to externally inhibit measurements. when setting up the TA720. For a description of the inhibit input, see section 2.5. ESC key For the procedure to set the inhibit input, Used to clear the soft key menu and see section 6.4.
Page 14 1.1 Front Panel and Rear Panel Rear Panel 10-MHz output terminal Outputs the 10-MHz clock signal. For a description on how to use the terminal, see section 13.3. 10-MHz reference input terminal Used when inputting an external reference clock. For a description on how to use the terminal, see section 6.8.
Page 15: Setting/Execution Key And Rotary Knob
Setting/Execution Key and Rotary Knob MODE Key (Section 5.1) MODE F U N C T I O N SAMPLE INPUT Shows a menu used to set the sampling mode. FUNCTION Key (Sections 5.2 to 5.8) INITIALIZE FILE DISPLA Y SCALE MARKER UTILITY Shows a menu used to select the measurement function and the measurement conditions for each measurement function.
Page 16 1.2 Setting/Execution Key and Rotary Knob Rotary Knob (Section 4.3 and 4.4) Used to set a value, move the cursor, select files, and etc. The rotary knob can be used when a “ ” or “ ” mark is shown on the menu (the numeric keys can also be used).
Page 17: Display
: Illuminates when the communication with an FTP server is established with the TA720 acting as an FTP client. For a description of the FTP client function, see section 12.3, “Setting the Network Drive (FTP Client Function).” : Illuminates when the TA720 is connected to the LAN as an FTP server and communication is taking place with an FTP client.
Page 18 1.3 Display Panorama display Displays the entire measured data. For a description of the panorama display, see page 2-17; for the procedure for turning ON/OFF the panorama display, see section 7.1, “Setting the Histogram Display.” Statistics display Statistical values can also be displayed along with the histogram display. For a description of the statistical computation, see page 2-21.
Page 19 1.3 Display Statistics Display in Hardware Histogram Mode (For a description of the statistics display, see page 2-16) Window label Setup parameters Statistical value List Display in Time Stamp Mode (For a description of the list display, see page 2-14) Data number of measurement 1 Data number of measurement 2 Time stamp of...
Page 20 1.3 Display Histogram Display in Inter-symbol Interference Analysis Mode (For a description of the inter-symbol interference analysis, see page 2-24) Setup parameters Histogram display of all Mark data Histogram display of extracted Mark data Statistic values of Statistical values of all Mark data extracted Mark data Window label...
Page 21: Chapter 2 Explanation Of Functions
It is possible to connect the TA720 to the Ethernet network and save the TA720 data to an FTP server or access the PC card or floppy disk installed in the TA720 from a PC. In addition, the TA720 can be controlled from a PC via the Ethernet interface.
Page 22: System Configuration, Block Diagram, And Principles Of Pulse Width Measurement
System Configuration, Block Diagram, and Principles of Pulse Width Measurement System Configuration Ethernet* • Access to the TA720 floppy disk or PC card • Save data to the network drive Ethernet port TA720 CH A/CH B • Remote control monitor output...
Page 23 (time over which the signal is being acquired). The TA720 can be controlled using a PC via the GP-IB or Ethernet (optional) interface. Measurement Principle (Pulse Width Measurement Example) Time shorter than the period of the reference clock is called fractional time. In general, since the signal being measured and the measurement clock are not synchronized, fractional time exists at both the beginning and the end of measurements.
Page 24: Sampling Mode
Sampling Mode Sampling Mode (See section 5.1 for the operating procedure) There are three sampling modes: time stamp mode, hardware histogram mode, and inter-symbol interference analysis mode. The sampling method (data acquisition method), the display format after measurements, and methods of analysis and calculation vary depending on the sampling mode.
Page 25: Measurement Function (Measurement Item)
Measurement Function (Measurement Item) The measurement functions that can be executed vary depending on the sampling mode as follows. • When in time stamp mode or hardware histogram mode • Single measurement function Period, A-to-B time interval, or pulse width •...
Page 26 2.4 Measurement Function (Measurement Item) Period A & Period B (Per.&Per.) (see section 5.5 for the operating procedure) Measures the period of the input signals of CH A and CH B simultaneously. Period A & period B cannot be selected in inter-symbol interference analysis mode. The slope can be set to the rising edges of the CH A and CH B signals or the falling edges.
Page 27: Setting Measurement Conditions
Setting Measurement Conditions Measurement Block The TA720 repeats the process of making measurements, processing data, and displaying the result. The “measurement block” refers to the smallest unit of measurement that is handled in one cycle of the process. As shown in the figure below, if the number of samples (number of data points) acquired in one cycle of the process is N, then “one...
Page 28 2.5 Setting Measurement Conditions Gate (Gate Mode) (see section 6.1 for the operating procedure) The range of the measurement block is specified using one of the following gates. Event Gate (Event) One sample is called one event, and the range of the measurement block is specified in terms of the number of events (event size).
Page 29 2.5 Setting Measurement Conditions Arming and Arming Delay (Delay Mode) (see section 6.3 for the operating procedure) The act of creating a trigger for starting a measurement of the measurement block is called activating an arming. There are two arming modes. Auto Arming Arming is activated at the same time as measurement start (START key or START communication command), and measurement starts.
Page 30 2.5 Setting Measurement Conditions • Relation between the inhibit signal and gating/external arming/arming delay External inhibit Measurement input signal inhibit period Gate Gate open Arming delay External arming input signal Not measured Input signal Measurement start Not counted as events Resume when inhibit is active measurement...
Page 31 The act of determining the measurement start point when measuring a single sample on the TA720 is called “activating a trigger.” For example, when the measurement start point of the period is set to the rising edge of the input signal, the measurement start point is when the input signal changes from below a specified level (trigger level) to above the level.
Page 32 The selectable range is 0.0 to 10.0 ns (resolution: 0.1 ns). Reference Clock Selection (Ref. Clock) (see section 6.8 for the operating procedure) The TA720 performs measurements using the internal 10-MHz reference clock as the time reference. An external 10-MHz clock signal can be used in place of the internal clock.
Page 33: Displaying The Measured/Calculated Results
Displaying the Measured/Calculated Results Histogram Display (see section 7.1 for the operating procedure) By displaying the histogram (frequency distribution) of the measured data, you can see the data distribution. Histogram display is possible in all sampling modes. This section describes the histogram display in time stamp mode and hardware histogram mode. For a description of the histogram display in inter-symbol interference analysis mode, see “Inter-symbol Interference Analysis”...
Page 34 2.6 Displaying the Measured/Calculated Results Statistics Display on the Histogram Display In addition to histograms, the list of statistics of each window or the graph of the statistical value “deviation” or “σ” can be displayed when all window display of multi window or auto window is used in hardware histogram mode or time stamp mode.
Page 35 2.6 Displaying the Measured/Calculated Results Time Variation Display (TimeVar.) (see section 7.3 for the operating procedure) In time stamp mode, the changes in the measured value with respect to the elapsed time from arming (time variation) can be displayed based on the measured values and time stamps stored in the acquisition memory.
Page 36 2.6 Displaying the Measured/Calculated Results Statistics Display (see section 7.4 for the operating procedure) In time stamp mode or hardware histogram mode, statistical parameters within a specified area can be computed, and the results can be displayed in a list. This section mainly describes the display of the statistical calculation results.
Page 37 2.6 Displaying the Measured/Calculated Results Panorama Display (see sections 7.1 and 7.3 for the operating procedure) When showing the histogram display or time variation display, window displaying all the measured data (called panorama window) can be shown at the top section of the main window.
Page 38 2.6 Displaying the Measured/Calculated Results Summation display The histograms (enclosed by the X1 and X2 markers) of all windows that have been set with the multi window function can be summed and displayed in one window. The center values of the X-axis of the histogram of each window are aligned and the frequencies of each bin are summed.
Page 39 2.6 Displaying the Measured/Calculated Results Reading the Measured Results Using Markers (see section 8.5 for the operating procedure) On the histogram display and time variation display, markers can be displayed to read measured values and other parameters. For histogram displays Three markers, X1, X2, and Y can be displayed, and the following values (readouts) can be read.
Page 40 2.6 Displaying the Measured/Calculated Results Symbol search (Sync Pattern) (see section 8.6 for the operating procedure) When the window mode is set to multi window or auto window on the list display of the time stamp mode or inter-symbol interference analysis mode, a specified symbol can be searched as shown in the following figure.
Page 41: Statistical Calculation And Inter-Symbol Interference Analysis
Statistical Calculation and Inter-Symbol Interference Analysis Statistical Calculation (see section 9.1 for the operating procedure) The statistical calculation values can be displayed in a list format on the statistics display as well as on the time variation display and histogram display. This section describes the area for performing the statistical calculation, constant T, and the statistical calculation parameter settings used to determine the statistical calculation values.
Page 42 2.7 Statistical Calculation and Inter-Symbol Interference Analysis Statistical Calculation Parameters In the following equations, n is the number of samples, X is the measured value of each sample, and X (only for histograms) is the median value of each bin of the histogram. If the statistics are calculated on the time variation, “T.”...
Page 43 2.7 Statistical Calculation and Inter-Symbol Interference Analysis • T.(P-P/Average) (only for time variation) Indicates the spread in the Peak-to-Peak values in terms of a percentage of the average value. × 100 T.(P-P/Average) = Average • T.RF (only for time variation) Calculates the average value of T.(P-P/Average) of all blocks that were block sampled.
Page 44 2.7 Statistical Calculation and Inter-Symbol Interference Analysis • Deviation is the center value of the x axis in the window (see page 2-13). Originally, CENTER represented the value around which the measured data would be distributed. CENTER Indicates the deviation of the measured average value with respect to X CENTER Deviation = Average –...
Page 45 2.7 Statistical Calculation and Inter-Symbol Interference Analysis Sync Function In inter-symbol interference analysis mode, inter-symbol interference analysis can be performed beginning with the symbol pattern specified by the symbol search function (see page 2-20). For example, this function allows the analysis to start from where the measured patterns of pulse width A and pulse width B match if the data pattern sequence is offset between pulse width A and pulse width B in the pulse width A→pulse width B measurement.
Page 46: Other Functions
PC. Data can be saved on a network drive via the Ethernet interface or the floppy disk or PC card of the TA720 can be accessed from a PC. In addition, the measured data can be output to a PC via the Ethernet interface or GP-IB interface to be analyzed or the TA720 can be externally controlled using communications.
Page 47 Self Test (see section 14.4 for the operating procedure) If you are in doubt as to whether the instrument has malfunctioned, you can run a self- test before contacting a YOKOGAWA dealer. You can run checks on the circuit board, the keys, the display, and other functions.
Page 48: Chapter 3 Before Starting Measurements
Handling Precautions Safety Precautions • When using the TA720 for the first time, make sure to read the “Safety Precautions” given on pages iv and v. • Do not remove the cover from the instrument. Some sections inside the instrument have high voltages that are extremely dangerous.
Page 49 3.1 Handling Precautions • Be careful not to scratch the surface of the LCD with sharp objects. Such act can lead to malfunction. • When cleaning the case or the operation panel, first remove the power cord from the outlet. Then, wipe with a dry, soft cloth. Do not use volatile chemicals such as benzene or thinner for cleaning, as this may lead to discoloration or deformation.
Page 50: Installing The Ta720
Installing the TA720 Installation Conditions Install the instrument in a place that meets the following conditions. Ambient Temperature and Humidity Use the instrument in the following environment: • Ambient temperature: 5 to 40°C However, in order to obtain highly accurate measurements, operate the instrument in the 23 ±...
Page 51 3.2 Installing the TA720 Storage Location When storing the instrument, avoid the following places: • Where the relative humidity is 80% or more. • In direct sunlight. • Where the temperature is 60°C or higher. • Near a high humidity or heat source.
Page 52 3.2 Installing the TA720 Rack Mount To rack mount the instrument, use the rack mount kit that is sold separately. Part Name Model Remarks Rack mount kit 751535-E4 For EIA Rack mount kit 751535-J4 For JIS An outline of the attachment procedures is given below. For details regarding the attachment procedures, see the instructions that are included with the rack mount kit.
Page 53: Connecting To The Power
Maximum power consumption (when using the printer) 250 VA * The TA720 can use a 100-V or a 200-V system for the power supply. The maximum rated voltage of the power cord varies depending on its type. Check that the voltage supplied to the TA720 is less than or equal to the maximum rated voltage of the provided power cord (see page ii) before using it.
Page 54: Turning On/Off The Power Switch
Is the correct voltage coming to the power outlet? See section 3.3. If the TA720 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.
Page 55: Connecting Cables And Probes
TA720. This may cause damage to the input section. Note When connecting a probe to the TA720 for the first time, perform phase correction of the probe as described in section 3.6, “Calibrating the Probe (Phase Correction).” Failure to do so will cause unstable gain across different frequencies, thereby preventing correct measurement.
Page 56 Power supply cable CAUTION Do not use the probe power supply terminal (2 terminals) on the rear panel of the TA720 for purposes other than supplying power to YOKOGAWA’s FET probe (700939). Otherwise, damage to the TA720 or connected instrument may result.
Page 57: Calibrating The Probe (Phase Correction)
CH B) to the signal input terminals of the DL1700 Series Digital Oscilloscope using BNC cables. For details on how to use the monitor output of the TA720, see section 13.5, “ Monitor Output.” Connect the BNC end of the probe to be phase corrected to the signal input terminal of the TA720.
Page 58 Consequently, a correct waveform cannot be input to the measurement circuit of the TA720. However, 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.
Page 59: Setting The Date/Time
Setting the Date/Time Procedure Press the UTILITY key to display the Utility menu. Press the soft keys in the following sequence: Next 1/2 > Config > Date/Time. The Date/Time setup menu appears. If Next2/2 is displayed, press the soft keys in the following sequence: Config > Date/Time.
Page 60: Chapter 4 Common Operations
Chapter 4 Common Operations Basic Setup Procedure This section describes the basic setup procedure. Basic setup procedure Set the sampling interval On the menu that appears by pressing the MODE key, select time stamp (TimeStamp), hardware histogram See section 5.1. (HardHist), or inter-symbol interference analysis (ISI).
Page 61: Starting/Stopping Measurements
The CHA/CHB input indicator is provided above the signal input terminal. If this indicator is not blinking, the signal may not be entering the TA720. Check the trigger level setting (see section 6.6), the cable connection, and the signal source.
Page 62: Basic Operation Of Keys And Rotary Knob
Basic Operation of Keys and Rotary Knob Setting keys Pressing the setting key such as the MODE key or FUNCTION key shows a soft key menu at the bottom section of the screen. Description of the Icons on the Soft Key Menu. : Press the soft key to open a pop-up menu or pop-up window.
Page 63: Entering Values And Character Strings
Entering Values and Character Strings Setting Values Using the Rotary Knob When a mark or mark appears on the soft key, set the value using the rotary knob. If the value consists of many digits, you can use the arrow keys ( ) below the rotary knob to move among the digits (the current digit is highlighted).
Page 64 4.4 Entering Values and Character Strings The Number and Types of Characters That Can Be Used for File Names Number of Characters Characters That Can Be Used File name 1 to 8 characters 0-9, A-Z, %, _, (, ), – (minus sign) Comment 0 to 25 characters All characters (including spaces)
Page 65: Chapter 5 Setting The Sampling Mode And Measurement Function
Chapter 5 Setting the Sampling Mode and Measurement Function Setting the Sampling Mode For a functional description, see 2.3. Procedure Press the MODE key to display the Mode menu. Press the soft key corresponding to the desired sampling mode. The corresponding screen appears. Explanation Selecting the Sampling Mode Select from the following:...
Page 66: Setting The Period Measurement
Setting the Period Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the Period soft key. Selecting the Measurement Channel Press the Channel soft key to select ChA or ChB.
Page 67: Setting The A-To-B Time Interval Measurement
Setting the A-to-B Time Interval Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the TI soft key. Selecting the Slope Press the Slope soft key to display the Slope selection menu.
Page 68 5.3 Setting the A-to-B Time Interval Measurement Note • When using the slope, histograms and statistical values can be displayed separately for the measured values of A↑B↑ or A↓B↑ and . When using the slope, histograms and statistical values can be displayed separately for the measured values of A↑B↓...
Page 69: Setting The Pulse Width Measurement
Setting the Pulse Width Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the Pulse Width soft key. Selecting the Measurement Channel Press the Channel soft key to select ChA or ChB.
Page 70 5.4 Setting the Pulse Width Measurement Note • When the polarity is set to , histograms and statistical values can be displayed separately for the measured values of • Changing the measurement function clears the data that has been acquired to the memory up to that point.
Page 71: Setting The Period A & Period B Measurement
Setting the Period A & Period B Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the Per.&Per. soft key. Selecting the Slope Press the Slope soft key to select A↑B↑...
Page 72: Setting The Period A & A-To-B Time Interval Measurement
Setting the Period A & A-to-B Time Interval Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the Period&TI soft key. Selecting the Slope Press the Slope soft key to display the Slope selection menu.
Page 73: Measurements Are Made Continuously
5.6 Setting the Period A & A-to-B Time Interval Measurement Continuous Measurement Conditions When the measurement edge interval of the CH A input signal is 20 ns or more and the measurement edge of CH B to the measurement edge of the CH A is 13 ns or more, measurements are made continuously.
Page 74: Setting The Pulse Width A & A-To-B Time Interval Measurement
Setting the Pulse Width A & A-to-B Time Interval Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the PW&TI soft key. When the sampling mode is set to inter-symbol interference analysis (ISI), the soft key is displayed as PW→TI.
Page 75: Measurement
5.7 Setting the Pulse Width A & A-to-B Time Interval Measurement • A A↑B↓: Measures from the rising edge to the next rising edge and from the falling edge to the next falling edge of the CH A input signal. At the same time, measures from the rising edge of the CH A input signal to the first falling edge of the CH B input signal.
Page 76: Setting The Pulse Width A & Pulse Width B Measurement
Setting the Pulse Width A & Pulse Width B Measurement For a functional description, see 2.4. Procedure Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu. Press the PW&PW soft key. When the sampling mode is set to inter-symbol interference analysis (ISI), the soft key is displayed as PW→PW.
Page 77: Setting The Gate
Chapter 6 Setting Measurement Conditions Setting the Gate For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. Selecting the Gate Mode Press the GateMode soft key to display the Gate Mode selection menu. Press the soft key corresponding to the desired gate mode.
Page 78 6.1 Setting the Gate Explanation Selecting the Gate Mode Select the gate mode that defines the gate (range of the measurement block) from the following: • Event (event size) Set the event size within the following range (resolution: 1). However, when block sampling (Block) is ON and the rest time (RestMode) is set to RestTime or RestEvent, the resolution is 2.
Page 79 6.1 Setting the Gate External gate signal input circuit +5 V 200 pF 500 kΩ Buffer amplifier 500 kΩ –5 V IM 704510-01E...
Page 80: Setting The Sampling Interval
Setting the Sampling Interval For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. Interval appears only when the sampling mode is set to time stamp and the measurement function is set to period, A-to-B time interval (TI), or pulse width. Press the Interval soft key.
Page 81: Setting The Arming
Setting the Arming For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. If GateMode is set to External, Arming does not appear. Press the Arming soft key to display the Arming selection menu. Selecting the Arming Source Press the Source soft key to select Auto or Ext.
Page 82 6.3 Setting the Arming Press the soft key corresponding to the desired level. Explanation Selecting the Arming Source Select from the following: • Auto: Arming is activated at the same time measurement is started (auto arming) • Ext: Arming is activated through an external arming input signal after the measurement is started Input Method of the External Arming Signal Apply a signal to the terminal marked EXT ARM/EXT GATE on the front panel (the...
Page 83 6.3 Setting the Arming Selecting the Arming Delay Type Select from the following. Selection can be made only when using external arming. • OFF: Arming delay selection and setting is not possible. Arming delay is not executed. • Time: Measurement starts after the specified time of delay. Selectable range of delay time: 1.0 µs to 1.0000000 s (100 ns steps) •...
Page 84: Setting Inhibit
Setting Inhibit For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. Inhibit does not appear when the sampling mode is set to inter-symbol interference analysis and dual measurement function is used. Selecting the Polarity Press the Inhibit soft key to select the polarity.
Page 85 6.4 Setting Inhibit CAUTION Applying a voltage that exceeds the maximum input voltage indicated above to the inhibit input terminal can damage the instrument. Inhibit signal input circuit +5 V 500 kΩ Buffer amplifier 500 kΩ –5 V IM 704510-01E...
Page 86: Setting The Block Sampling
Setting the Block Sampling For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. Block does not appear when the sampling mode is set to inter-symbol interference analysis mode (because block sampling cannot be performed). Press the Block soft key to display the Block Sample selection menu.
Page 87 6.5 Setting the Block Sampling Note • The total sample size of all blocks is within the maximum sampling size. • Block sampling cannot be performed when using the dual measurement function, when using the external gate, or when in inter-symbol interference analysis mode. Setting the Rest Time Select from the following: OFF:...
Page 88: Setting The Input Coupling, Input Impedance, And Trigger
Setting the Input Coupling, Input Impedance, and Trigger For a functional description, see 2.5. Procedure Press the INPUT key to display the Input menu. Selecting the Source Channel Press the Setting soft key to display the Input Setting menu. Press the ChA or ChB soft key. Selecting the Input Impedance Press the Impedance soft key to select the input impedance.
Page 89 6.6 Setting the Input Coupling, Input Impedance, and Trigger Select the Trigger Mode. Select from the following. • Manual: Trigger is activated on the specified trigger level (voltage). • SingleAuto: Taking the maximum and minimum values of the input signal during the first measurement block to be 100% and 0%, respectively, the trigger level is set to the specified percentage level.
Page 90: Adjusting The Phase During Time Interval Measurement
Adjusting the Phase during Time Interval Measurement For a functional description, see 2.5. Procedure Press the INPUT key to display the Input menu. Press the Setting soft key to display the Input Setting menu. Press the ChB soft key. Press the Phase Adj soft key. Phase Adj appears only for the measurement functions of A-to-B time interval, period A &...
Page 91: Settings When Applying An External Reference Clock Signal
Settings When Applying an External Reference Clock Signal For a functional description, see 2.5. Procedure Press the SAMPLE key to display the Sample menu. Press the Ref.Clock soft key to select Ext. Explanation Selecting the Reference Clock Select Ext when applying a reference clock signal externally. To set the reference clock back to the internal signal, select Int.
Page 92: Chapter 7 Basic Display Setup
Chapter 7 Basic Display Setup Setting the Histogram Display For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Item soft key to display the Item selection menu. Press the Histogram soft key. Setting the Display Style Press the Style soft key to display the Display Style menu.
Page 93 7.1 Setting the Histogram Display Full: Displays the histogram main window over the entire screen. Setting the Display Style Turns ON/OFF the display items other than the histograms. • Statistics: Turning ON/OFF the Statistics Display When the size of histogram main window is set to Half, the statistical values are displayed outside the window;...
Page 94 7.1 Setting the Histogram Display • Overlap: Turn ON/OFF the overlapped display of the measurement results of the pulse widths of both polarities and A-to-B time interval. Sets whether the histograms of the measured results of positive polarity and the histograms of the measured results of the negative polarity are displayed overlapped (ON) or displayed separately in the top and bottom windows (OFF).
Page 95: Setting The List Display
Setting the List Display For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Item soft key to display the Item selection menu. Press the List soft key. Specifying the Displayed Data •...
Page 96 7.2 Setting the List Display Explanation List Display The number of items that can be displayed at once in a list is 20 data points of a single measurement function. The data number is a sequence number that is assigned to the measured data starting from 1.
Page 97 7.2 Setting the List Display • When in hardware histogram mode Displays the data number, median value of the measured values, and frequency of occurrence in the list. When using the dual measurement function, two columns are used. When using the single measurement function, the left side of the screen shows the list and the right side shows the histogram vertically.
Page 98 7.2 Setting the List Display • Display example when using the dual measurement function Specifying the Data to Be Displayed in the List The number of data points that can be displayed at once on the screen is 20. The displayed data can be scrolled using the rotary knob.
Page 99: Setting The Time Variation Display
Setting the Time Variation Display For a functional description, see 2.6. Procedure The following operation is not possible when in hardware histogram mode or inter- symbol interference analysis mode (because time variation display is not possible). Press the DISPLAY key to display the Display menu. Press the Item soft key to display the Item selection menu.
Page 100 7.3 Setting the Time Variation Display Setting the Display Style Turns ON/OFF the display items other than the time variation. • Statistics: Turning ON/OFF the statistics display When the size of time variation main window is set to Half, the statistical values are displayed outside the window;...
Page 101: Setting The Statistics Display
Setting the Statistics Display For a functional description, see 2.6. Procedure This section does not explain the settings of the calculation range and calculation parameters. For a description of these items, see section 9.1, “Setting the Range and Parameters of Statistical Calculation.” Press the DISPLAY key to display the Display menu.
Page 102 7.4 Setting the Statistics Display • Changing the Displayed Blocks and Displayed Statistical Parameters when All Is Selected Press the soft key and then change the statistical parameters to be displayed using the rotary knob. • Specifying the Displayed Block when Window Is Selected Press the WindowNum soft key and then specify the window to be displayed using the rotary knob.
Page 103 7.4 Setting the Statistics Display Display Examples • Hardware histogram mode, measurement function: pulse width A, polarity: positive, display style: All • Hardware histogram mode, measurement function: pulse width A, polarity: positive, display style: Window • Time stamp mode, measurement function: pulse width A, statistical calculation item: Hist, display style: All 7-12 IM 704510-01E...
Page 104 7.4 Setting the Statistics Display • Time stamp mode, measurement function: pulse width A, statistical calculation item: Hist, display style: Window • Time stamp mode, measurement function: pulse width A & pulse width B, polarity: both, statistical calculation item: Hist, display style: All •...
Page 105 7.4 Setting the Statistics Display Display Examples • Time stamp mode, measurement function: pulse width A, polarity: positive, statistical calculation item: T.V., display style: All • Measurement function: pulse width, statistical calculation item: T.V., display style: Block Note • For the procedure of setting the statistical calculation parameters, see section 9.1, “Setting the Range and Parameters of Statistical Calculation.”...
Page 106: Chapter 8 Detailed Display Setup
Chapter 8 Detailed Display Setup Setting the Single Window For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Window soft key to display the Window Parameter Setting dialog box. Turn the rotary knob to select Mode, and then press the SELECT key to select Single. Selecting the Setup Item (only for dual measurement function) Turn the rotary knob to select Item, and then press the SELECT key to select Meas1Meas1 or Meas2.
Page 107: Setting The Multi Window
Setting the Multi Window For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Window soft key to display the Window Parameter Setting dialog box. Turn the rotary knob to select Mode, and then press the SELECT key to select Multi.
Page 108 8.2 Setting the Multi Window Setting the Window Offset Value Turn the rotary knob to select Offset, and then press the SELECT key to show the value entry area. Enter the desired offset using the numeric keys. After entering the value, press the n key or µ key. Updating the Window Turn the rotary knob to select Update to Window, and then press the SELECT key.
Page 109 8.2 Setting the Multi Window Explanation Window Mode: Multi Multiple windows of different sizes can be specified. This mode is used when multiple histograms are present simultaneously and constant T is known. Window size Displays the histogram of 3T Select multi window Set the scale value and marker value of each window Center value of the window (scale value) Select window to be displayed on the main window...
Page 110 8.2 Setting the Multi Window Setting the X-Axis of the Window The setting of the following parameters can be changed for each window. • Label: Window name (selectable range is 1 to 16) • Center: Center value • Span: Window span •...
Page 111: Setting The Auto Window
Setting the Auto Window For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Window soft key to display the Window Parameter Setting dialog box. Turn the rotary knob to select Mode, and then press the SELECT key to select Auto.
Page 112 Modulation type used in CDs. • EFM+: Modulation type used in DVDs. It is also called 8-16 modulation. • 1-7: 1-7 RLL modulation type. Used in rewritable disks. The TA720 provides the following windows for each modulation type. Modulation Type Window Window Size...
Page 113 8.3 Setting the Auto Window Selecting the Method of Calculating Constant T (T Type) Select either of the following. • Measured T: Automatically measures the constant T value from the CH B clock input signal. • Estimated T: Estimates the value of T from the input signal and modulation type. However, possible selections vary depending on the sampling mode and measurement function as follows.
Page 114 8.3 Setting the Auto Window Copying the Auto Window Settings to the Single Window (Copy to Single Window) Copies the X-axis setting that is set automatically based on the T value that is automatically measured to the single window. This function can be used only for A-to-B time interval measurement.
Page 115: Changing The Scale Value Of The Histogram And Time Variation Displays
Changing the Scale Value of the Histogram and Time Variation Displays For a functional description, see 2.6. Procedure Auto Scaling Press the Auto SCALE key. Note Auto scaling cannot be performed in the following cases. • When auto window is specified in hardware histogram mode. •...
Page 116 8.4 Changing the Scale Value of the Histogram and Time Variation Displays Explanation Auto Scaling The X-axis and Y-axis is automatically set to values that are appropriate for the measured data. The following limitations are present depending on the combination of the sampling mode and window mode.
Page 117: Reading Measured Results Using Markers
Reading Measured Results Using Markers For a functional description, see 2.6. Procedure Displaying Markers Press the MARKER key to display the Marker menu. The menu item does not appear in inter-symbol interference mode since markers cannot be used. Press the Marker soft key to select ON. Selecting the Marker Control Item (only for dual measurement function) Press the Link soft key to display the Link menu.
Page 118 8.5 Reading Measured Results Using Markers Marker Type • X Marker (X1, X2): On the histogram display, the measured value and frequency at the X-axis coordinate of markers X1 and X2 are displayed. On the time variation display, the time stamp and measured value are displayed.
Page 119: Symbol Search
Symbol Search For a functional description, see 2.6. Procedure Press the DISPLAY key to display the Display menu. Press the Item soft key to display the Item selection menu. Press the List soft key. Press the Window soft key to display the Window Parameter Setting dialog box. Set the multi window or auto window according to the procedures given in section 8.2, “Setting the Multi Window”...
Page 120 8.6 Symbol Search Explanation Conditions That Allows Symbol Search Symbol search is possible only when using the multi window or auto window with the sampling mode set to time stamp or inter-symbol interference analysis. Setting the Link When using the dual measurement function (period A & period B, period A & A-to-B time interval, pulse width A &...
Page 121: Chapter 9 Statistical Calculation And Inter-Symbol Interference Analysis
Chapter 9 Statistical Calculation and Inter-Symbol Interference Analysis Setting the Range and Parameters of Statistical Calculation For a functional description, see 2.7. Procedure For details on the settings related to the statistical calculation other than the calculation range and calculation parameters, see section 7.4, “Setting the Statistics Display.”...
Page 122 9.1 Setting the Range and Parameters of Statistical Calculation Setting Constant T Turn the rotary knob to select T Value, and then press the SELECT key to show the value entry area. When using the dual measurement function (period A & period B, period A & A- to-B time interval, pulse width A &...
Page 123 9.1 Setting the Range and Parameters of Statistical Calculation • Setting the Statistical Calculation Parameter Turn the rotary knob to select the parameter you wish to calculate, and then press the SELECT key. If you press the SELECT key on a parameter that is already selected, it is deselected (the parameter will not be calculated).
Page 124 9.1 Setting the Range and Parameters of Statistical Calculation Selecting the Calculation Polarity/Slope Statistical calculation can be performed on the data of the specified slope or polarity. The positive slope/polarity, the histogram of the slope/polarity, and both slopes/polarities are displayed in red, light blue, and orange, respectively. You can make the selection in the following cases.
Page 125 Setting the Inter-symbol Interference Analysis For a functional description, see 2.7. Procedure Selecting the Inter-symbol Interference Analysis Mode Press the MODE key to display the Mode selection menu. Press the ISI soft key. Selecting the Measurement Function Press the FUNCTION key to display the Function menu. Press the Function soft key to display the Function selection menu.
Page 126 9.2 Setting the Inter-symbol Interference Analysis Selecting the Statistical Calculation Parameters to Be Listed Press the Calc/Stat soft key to display the Calculation/Statistics Setting dialog box. Turn the rotary knob to select the statistical calculation parameter to be displayed in the list, and then press the SELECT key. •...
Page 127: Setting The Inter-Symbol Interference Analysis
9.2 Setting the Inter-symbol Interference Analysis Select Prev.…, Next…, or Both…. • When the extraction mode is set to Combination Selecting the trigger Press the Trigger soft key to select Selecting the Window to Be Used as a Trigger Press the soft key and then turn the rotary knob to select the window to be used as a trigger.
Page 128 9.2 Setting the Inter-symbol Interference Analysis Setting the Polarity of Mark/Space Press the Polarity soft key to select whether spaces will be positive ( ) or marks will be positive ( • When the extraction mode is set to Single Selecting the trigger Press the Trigger soft key to select Press the...
Page 129 In the table below, represents a space and represents a mark. On the TA720, you can select which window will be marks and which will be spaces. • Pulse width measurement or pulse width A→pulse width B measurement.
Page 130 9.2 Setting the Inter-symbol Interference Analysis Pulse width A & A-to-B time interval measurement. Slope = A A↑B↑ Mode Polality Trigger Target Explanation Single Prev. A↑B↑ Extracts the front edge or Next A↑B↑ back edge of the trigger Next A↑B↑ Prev.
Page 131 9.2 Setting the Inter-symbol Interference Analysis Slope = A Mode Polality Trigger Target Explanation Single Prev. A↑B↓/Next A↓B↓ Extracts the front Prev. A↓B↓/Next A↑B↓ edge or back Prev. A↓B↓/Next A↑B↓ edge of the trigger Prev. A↑B↓/Next A↓B↓ Combination Prev. A↑B↓/Mid. A↓B↓/ Extracts the front Next A↑B↓...
Page 132: Examples Of Inter-Symbol Interference Analysis
Examples of Inter-symbol Interference Analysis Pulse Width Measurement When the trigger is set to Single (Space) Analyzes the Mark data immediately before the Space (3T) Mark Mark Mark Space Space Mark Space Space Mark 3T 3T Trigger Trigger Trigger Analyzes the applicable Mark data. Setting Mode: ISI Function: PulseWidth...
Page 133 9.3 Examples of Inter-symbol Interference Analysis Pulse Width A→Pulse Width B Measurement When the trigger is set to Combination (Space/Mark) Analyzes the Mark data of CH B immediately before the Space (3T)→Mark (7T) combination pattern of CH A Mark Mark Mark Mark Space...
Page 134 9.3 Examples of Inter-symbol Interference Analysis When the trigger is set to Between (Space-Space) and the data of ChA and ChB are offset Analyzes the Mark data of ChB that is in between Space (3T)-Space (3T) of ChA by specifying the analysis start point using the symbol (Sync Pattern) search. Mark Space Mark...
Page 135 9.3 Examples of Inter-symbol Interference Analysis Pulse Width A→A-to-B Time Interval Measurement When the trigger is set to Single (Space) Analyzes the A↓B↑ data from the front edge of Space (3T) Space Space Space Space Mark Mark Mark Mark Mark 3T 3T CH A measurement Trigger...
Page 136 9.3 Examples of Inter-symbol Interference Analysis A↑ to B↑ Measurement Excluding the Minimum Mark or Space Analyzes the A↑ to B↑ data excluding the minimum Mark or Space (3T) Space Space Space Space Mark Mark Mark Mark Mark CH A measurement 3T 3T Trigger CH B measurement...
Page 137: Storing The Setup Parameters To The Internal Memory
The maximum number of characters for a comment is 10. A comment can be entered for each memory number. Note • The stored setup parameters are not cleared even if you initialize the settings on the TA720. • For details on parameters that are not stored, see page 13-3. 10-1...
Page 138: Recalling Setup Parameters
Executing the Recall Operation Press the Recall soft key to recall the setup parameters. Explanation Recalled Parameters When setup parameters are recalled, the TA720 setup is changed to the stored setup parameters. Selecting the Memory Number Select from the following 32 memory numbers.
Page 139: Chapter 11 Saving/Recalling Data And Outputting Screen Images
Ethernet network. Floppy Disks That Can Be Used The following types of 3.5" floppy disks can be used. Formatting is also possible on the TA720. • 2HD: Formatted to 1.44 MB using MS-DOS. • 2DD: Formatted to 720 KB using MS-DOS.
Page 140: Using The Pc Card (Optional)
For details, contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. Note Note that the PC card that is used with the TA720 may not be recognized by some PC types. Installing the PC Card The PC card slot is located on the rear panel of the TA720.
Page 141: Formatting The Storage Medium
11.3 Formatting the Storage Medium Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the Utility soft key. Press the Function soft key to display the Function menu. Press the Format soft key. The File List dialog box appears. On the File List dialog box, turn the rotary knob to select the storage medium to be formatted.
Page 142 • If the TA720 cannot recognize a formatted storage medium, format the storage medium again on the TA720. Note that all the data on the storage medium are cleared when the storage medium is formatted. Make sure to back up important data beforehand.
Page 143 11.3 Formatting the Storage Medium Listing the Storage Medium Information A list of information about the selected storage medium is displayed. • Media Name: Name of the storage medium. • Media Size: Total size. • Used Space: Size of the used area. •...
Page 144: Saving And Recalling Setup Parameters
11.4 Saving and Recalling Setup Parameters Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the File Item soft key to display the File Item selection menu. Press the Setup soft key. Saving Setup Parameters Press the Save soft key to display the Save menu. Setting the Save Destination Directory Press the File List soft key to display the File List.
Page 145 11.4 Saving and Recalling Setup Parameters Turn the rotary knob to select AutoNaming. Press the SELECT key to select ON or OFF. Turn the rotary knob to select File Name and press the SELECT key. A keyboard appears on the screen. Use the rotary knob and SELECT key to enter the file name.
Page 146 When Auto Naming is turned ON, files with a three digit number from 000 to 499 are automatically created when saving the data. You can specify a common name (up to five characters, TA720 by default) that is placed before the number. Properties Lists the file size, saved date/time, attribute, and comment of the selected file.
Page 147: Saving And Recalling Measured Results
11.5 Saving and Recalling Measured Results Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the File Item soft key to display the File Item selection menu. Press the Measure soft key. Saving the Measured Results Selecting the Data Type Press the Data Type soft key to select Ascii or Bin.
Page 148 11.5 Saving and Recalling Measured Results Setting the File Name Press the File Name soft key to display the File Name dialog box. Turn the rotary knob to select AutoNaming. Press the SELECT key to select ON or OFF. Turn the rotary knob to select File Name and press the SELECT key. A keyboard appears on the screen.
Page 149 The measured results are saved as binary data. The saved data can be recalled on the TA720. A measurement data file with .wvf extension and a header file with .hdr extension are saved. The header file is a file containing information that is necessary when analyzing the saved measured data.
Page 150 When Auto Naming is turned ON, files with a three digit number from 000 to 499 are automatically created when saving the data. A common name (up to five characters, TA720 by default) is attached before the number. 11-12 IM 704510-01E...
Page 151 Saving and Recalling of measured results are not possible while measurement is in progress (while the START/STOP indicator is illuminated). • When measured results are recalled, the TA720 settings are changed to the those that correspond with the recalled measured results. •...
Page 152: Saving The Statistical Calculation Results
11.6 Saving the Statistical Calculation Results Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the File Item soft key to display the File Item selection menu. Press the Statistics soft key. Saving the Statistical Calculation Results Selecting the Data Type (only in time stamp mode) Press the Stat Item soft key to select Hist or T.V.
Page 153 11.6 Saving the Statistical Calculation Results Setting the File Name Press the File Name soft key to display the File Name dialog box. Turn the rotary knob to select AutoNaming. Press the SELECT key to select ON or OFF. Turn the rotary knob to select File Name and press the SELECT key. A keyboard appears on the screen.
Page 154 When Auto Naming is turned ON, files with a three digit number from 000 to 499 are automatically created when saving the data. You can specify a common name (up to five characters, TA720 by default) that is placed before the number. Properties Lists the file size, saved date/time, attribute, and comment of the file.
Page 155: Deleting Files And Directories
11.7 Deleting Files and Directories Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the Utility soft key. When Function is set to Copy, the menu appears as follows. Press the Function soft key to display the Function menu. Press the Delete soft key to display the File List and Delete menus.
Page 156 11.7 Deleting Files and Directories Selecting the Files to Be Deleted Turn the rotary knob to select the file or directory you wish to delete and press the SET/RESET soft key. An asterisk appears to the left of the file name. Press the Set/Reset soft key again to remove the asterisk.
Page 157 11.7 Deleting Files and Directories Changing the File Attribute (Attr) The following attribute on a file saved to a floppy disk or PC card can be changed one file at a time. You cannot change a directory attribute. If you set the attribute to R, the file cannot be deleted.
Page 158: Copying Files
11.8 Copying Files Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the Utility soft key. When Function is set to Delete, the menu appears as follows. Press the Function soft key to display the Function menu. Press the Copy soft key to display the File List and Copy menus. To limit the type of files to be displayed, press the Filter soft key to select *.XXX.
Page 159 11.8 Copying Files Selecting the Copy Source Files Turn the rotary knob to select the copy source file and press the SET/RESET soft key. An asterisk appears to the left of the file name. Press the Set/Reset soft key again to remove the asterisk.
Page 160: Renaming Files And Directories
11.9 Renaming Files and Directories Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the Utility soft key. When Function is set to Delete, the menu appears as follows. Press the Function soft key to display the Function menu. Press the Rename soft key to display the File List and Rename menus.
Page 161 TA720, only the first 7 characters and extension are displayed as in TA72000>.SET (only the first 7 characters for directories). Do not change the extension of files used on the TA720. If you do, the files will no longer be usable on the TA720.
Page 162: Creating Directories
11.10 Creating Directories Procedure Press the SHIFT+UTILITY(FILE) key to display the File menu. Press the Utility soft key. When Function is set to Delete, the menu appears as follows. Press the Function soft key to display the Function menu. Press the Make Dir soft key to display the File List and Make Dir menus. To limit the type of files to be displayed, press the Filter soft key to select *.XXX.
Page 163 • Enter the directory name using up to 8 characters. • A directory created on a network drive cannot be renamed from the TA720. Deleting the directory is possible. • When renaming a directory on a floppy disk or PC card (see section 11.9), up to 25 characters can be used.
Page 164: Installing The Printer Roll Paper
11.11 Installing the Printer Roll Paper Printer Roll Paper The TA720 uses a dedicated roll paper provided by YOKOGAWA. Do not use other types of roll paper. When you are using the printer for the first time, use the roll paper that came with the package.
Page 165: Installation Procedure
11.11 Installing the Printer Roll Paper Installation Procedure While pressing the lock release lever to the OPEN direction, lift the handle on the left side of the printer cover to open the Lock release lever printer cover. Handle Printer cover Move the release arm, located on the right near the front, to the MAN FEED position.
Page 166 11.11 Installing the Printer Roll Paper Move the release arm to the FREE position and straighten out the paper. Then, move the release arm to the HOLD FREE position. HOLD The printing will fail with an error message, if the release arm is in the FREE or MAN FEED position during operation.
Page 167: Printing The Screen Image
11.12 Printing the Screen Image Procedure Press the SHIFT+COPY (COPY MENU) key to display the Copy menu. Press the Copy to soft key to display the Copy Destination menu. Press the Printer soft key to set the print destination to the built-in printer. Paper Feeding Press the Paper Feed soft key to execute paper feeding.
Page 168: Saving The Screen Image
11.13 Saving the Screen Image Procedure Press the SHIFT+COPY (COPY MENU) key to display the Copy menu. Press the Copy to soft key to display the Copy Destination menu. Press the Drive soft key. Setting the Save Destination Directory Press the File List soft key to display File List. Turn the rotary knob to select the save destination storage medium (indicated with ) and press the SELECT key.
Page 169 11.13 Saving the Screen Image Turn the rotary knob to select File Name and press the SELECT key. A keyboard appears on the screen. Use the rotary knob and SELECT key to enter the file name. For the procedure to enter the character string, see section 4.4. Selecting the Data Format Press the Format soft key to display the Format menu.
Page 170 11.13 Saving the Screen Image Explanation Save Destination Storage Medium Screen images can be saved to the following three types of storage medium. FD0: Floppy disk CA0: PC card (when the number of partitions is 1) CA0-1: PC card (when the number of partitions is 2 or more) ND0: Network drive Output Data Format and Extension...
Page 171: Chapter 12 Ethernet Communications (Option)
RJ-45 modular jack 10BASE-T port Connecting to the Network Connect the TA720 to the network via a hub or router as shown below. If the connector type is different, use an adapter or other similar devices. Hub or router that...
Page 172: Setting The Tcp/Ip
To set up the DNS, proceed to step 11. If you do not wish to set up the DNS, check the network cable connection and restart the TA720. The IP address, subnet mask, and default gateway are automatically configured.
Page 173 Consult your network administrator to see if DHCP can be used. If DHCP is used, a different IP address may be assigned to the TA720 each time the power is turned ON. Therefore, you must be careful when using the FTP server function of the TA720.
Page 174 In the case of the TA720, the host name of the destination can be specified using a name instead of an IP address when using the network drive function or network printer function.
Page 175: Setting The Network Drive (Ftp Client Function)
12.3 Setting the Network Drive (FTP Client Function) Procedure Press the UTILITY key to display the Utility menu. Press the Network soft key to display the Network menu. Press the Net Drive soft key to display the Net Drive Setup dialog box. Turn the rotary knob to move the cursor to FTP Server and press the SELECT key to display the keyboard.
Page 176 12.3 Setting the Network Drive (FTP Client Function) Notes on Setting the FTP Client Function • The client cannot move above the home directory. • The newest file is not necessarily displayed at the top of the file list. • File and directory names that exceed 8 characters, the characters beyond the 7th character are displayed as >.
Page 177: Accessing The Pc Card Or Floppy Disk (Ftp Server Function)
Number of Characters of the Login Name and Password Up to 15 characters. Timeout Time When the TA720 (FTP server) is accessed from an FTP client and there is no access to the TA720 for a specified period, the network connection is automatically closed. 12-7...
Page 178 12.4 Accessing the PC Card or Floppy Disk (FTP Server Function) Notes on Using the FTP Server Function • The TA720 supports only a single client. • When the TA720 is accessed from the PC or workstation (login), is displayed at the upper right corner of the screen.
Page 179: Checking The Mac Address And Turning On/Off The Ftp Passive Mode
Use the SELECT key to select ON or OFF. Explanation MAC Address The MAC address is a hardware address that is assigned to the TA720 for identification purposes on the network. Note The MAC address is displayed only when the Ethernet interface is installed. If XXXXXX_XXX_XXX is displayed for the MAC address even when the Ethernet interface is installed, contact your nearest YOKOGAWA dealer.
Page 180 12.5 Checking the MAC address and Turning ON/OFF the FTP Passive Mode Turning ON/OFF the FTP Passive Mode Turn this function ON when using the TA720 behind a firewall that requires the passive mode. The default setting is OFF. 12-10...
Page 181: Chapter 13 Other Functions
Chapter 13 Other Functions 13.1 Initializing the Settings Procedure Press the SHIFT+MARKER (INITIALIZE) key to display the Initialize menu. Press the Execute soft key. An Alert dialog box opens. Turn the rotary knob to select OK, and then press the SELECT key. To cancel the initialization, select Cancel and press the SELECT key.
Page 182 13.1 Initializing the Settings Item Setting INPUT key (both CHA and CHB) Impedance 1 MΩ Coupling Trigger Mode Manual Manual Level 0.000 V Auto Level (CHB) Phase Adj 0.0 ns (for both EXT ARM/EXT GATE and INHIBIT) Impedance 1 M fixed Coupling DC fixed Trigger Level...
Page 183 GP-IB GP-IB settings Gpib Address Endian LSBFirst Start Data End Data Data Type Ascii Data Select Time Stamp File related items File Item Setup Data Type Ascii Stat Item Hist Auto Naming File Name “TA720” Comment “” 13-3 IM 704510-01E...
Page 184 13.1 Initializing the Settings Item Factory Default Settings Utility Function Delete Filter Partition Num Ethernet related items Network TCP/IP DHCP IP Address 0.0.0.0 Net Mask 255.255.255.0 Gate Way 0.0.0.0 Domain Name “” DSN Server1 0.0.0.0 DSN Server2 0.0.0.0 Domaim Suffix1 “”...
Page 185: Calibration
Calibration Results If the calibration is successful, PASS is displayed; if it fails, FAIL is displayed. If FAIL is displayed, perform a self test (see section 14.4) to diagnose the TA720. Note When executing calibration, leave the input terminals (CH A and CH B) open.
Page 186: 10-Mhz Output
* Typical value represents a typical or average value. It is not strictly warranted. 10-MHz output circuit 50 Ω 470 pF CAUTION Do not apply external voltage to the 10MHz OUT terminal. Doing so can cause damage to the TA720. 13-6 IM 704510-01E...
Page 187: Gate Output
When the gate is open, the TTL level signal from the GATE OUT terminal is set high. CAUTION Do not apply external voltage to the GATE OUT terminal. Doing so can cause damage to the TA720. Gate output circuit +5 V 50 Ω...
Page 188: Monitor Output
* Typical value represents a typical or average value. It is not strictly warranted. CAUTION Do not apply external voltage to the MONITOR OUT terminal. Doing so can cause damage to the TA720. Monitor output circuit +5 V 50 Ω...
Page 189: Viewing The Setup Conditions And Rom Version Of The Ta720
Measurement conditions and display parameters that are set using the following keys can be displayed. MODE key, FUNCTION key, INPUT key, DISPLAY key, SCALE key, MARKER key, and UTLITY key ROM Version The model and suffix code of the TA720 and the software version can be displayed. 13-9 IM 704510-01E...
Page 190: Turning On/Off The Beep Sound, Click Sound, And Warning Display, And Setting Lcd
13.7 Turning ON/OFF the Beep Sound, Click Sound, and Warning Display, and Setting LCD Procedure Press the UTILITY key to display the Utility menu. • Changing the Operation Sound, Click Sound and Setting the Warning Display Press the Config soft key to display the Configuration menu. •...
Page 191 13.7 Turning ON/OFF the Beep Sound, Click Sound, and Warning Display, and Setting LCD Turning ON/OFF the Warning Display Specify whether to display warning messages. The default setting is ON. Setting the LCD The following settings can be changed. • Backlight auto off If there is no key operation for a specified time, the backlight automatically turns OFF.
Page 192: Chapter 14 Troubleshooting And Maintenance
The display is odd. The system is not operating properly. Power-cycle the TA720. – Keys do not work. The TA720 is in the remote mode. Set the TA720 in the local mode. Cannot make Incorrect trigger level. Set a proper trigger level.
Page 193: Messages
File system is abnormal. – Cannot load this file format. Attempted to load a file that was not saved by 11-8, 11-12 the TA720. File is now being accessed. File is being accessed. Wait unit it is finished. – Please wait.
Page 194 14.2 Messages Error No. Message Description Page Printer not warm enough. The printer temperature is too low. – Printer time out. Printer has timed out. – Stop measurement before using internal Stop the measurement to make printouts. 11-29 printer. Cannot output data while measuring. Data cannot be saved while the measurement 11-8, 11-12, 11-16 is in progress.
Page 195 14.2 Messages Error No. Message Description Page Sampling interval cannot be entered Sampling interval cannot be specified when using while Estimated T. Estimated T. Changed to Measured T or switch the window mode. Cannot be specified in this measurement Cannot be specified in this measurement item. –...
Page 196: Displaying The Error Log
Explanation When an operation error, a communication error, or a warning occurs, the TA720 creates an error message list and displays a mark at the upper right corner of the screen. The details of the message can be viewed by displaying the error log.
Page 197: Self Test
14.4 Self Test Procedure Before taking the following steps, remove all the cables that are connected to the terminals on the front and rear panels, and stop the measurement. Press the UTILITY key to display the Utility menu. Press the Selftest soft key to display the Selftest menu. Press the Selftest soft key to display the Selftest selection menu.
Page 198 PASS should appear on all items. Explanation When a Failure Is Found from the Test It is probably a malfunction. Please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual for repairs. 14-7 IM 704510-01E...
Page 199 Text Indicating the Results of the Board Test If a failure is found, FAIL or the following character string appears in place of PASS. In either case, servicing is required. Please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual for repairs.
Page 200: Adjusting The Time Base
(TA1100) and measure using the external reference frequency. • Using a BNC cable, connect the 10MHz OUT terminal on the rear panel of the TA720 to the CH A input terminal of the frequency counter (TA1100).
Page 201 Adjustment Procedure • Adjust the TA720 after 30 minutes of warm-up. • Turn the REFERENCE ADJUST on the rear panel of the TA720, and adjust it so that the read-out value of the frequency counter is within the following range.
Page 202: Performance Test
OUTPUT CH A CH B Instrument Settings • TA720: Input settings: DC coupling, 1 MΩ, trigger level = 0 V • 7651: Output level: 4.000 V, 0 V, –4.000 V Test Method • Calibrate the TA720 after 30 minutes of warm-up.
Page 203 14.6 Performance Test Increase the trigger level of the TA720 in 5-mV steps. Gradually increase the trigger level and record the voltage at which the input indicator illuminates as VH. The trigger voltage is derived by taking the average of VL and VH. Confirm that this voltage is within the allowable range.
Page 204 • Set the frequency of the 8657B to the values given in the table below, and check that the measured values (mean value and standard deviation) are within the allowable range using the period measurement function on the TA720. Perform the same test on both CH A and CH B.
Page 205 14.6 Performance Test Test Result • CH A↑ Synthesized Signal Generator Frequency Average Standard Deviation Measured Value Allowable Range Measured value Allowable Range 10 MHz 99.7 ns to 100.3 ns 280 ps or less 166.6 MHz 5.7 ns to 6.3 ns 120 ps or less •...
Page 206 • Set the frequency of the 8657B to the values given in the table below, and check that the measured values (mean value and standard deviation) are within the allowable range using the period measurement function on the TA720. Perform the same test on both CH A and CH B.
Page 207 14.6 Performance Test Test Result • CH A↑ Synthesized Signal Generator Frequency Average Standard Deviation Measured Value Allowable Range Measured value Allowable Range 10 MHz 99.7 ns to 100.3 ns 120 ps or less 166.6 MHz 5.7 ns to 6.3 ns 100 ps or less •...
Page 208 • Set the frequency of the 8657B to the values given in the table below, and check that the measured values (mean value and standard deviation) are within the allowable range using the pulse width measurement function on the TA720. Perform the same test on both CH A and CH B.
Page 209 14.6 Performance Test Test Result • CH A Synthesized Signal Generator Frequency Average Standard Deviation Measured Value Allowable Range Measured value Allowable Range 10 MHz 48.4 ns to 51.6 ns 120 ps or less 83.3 MHz 5.0 ns to 7.0 ns 100 ps or less •...
Page 210 Agilent Technologies) • Power divider • Characteristic impedance: 50Ω • Recommended instrument: 70-0966 Power Divider (by YOKOGAWA) The procedure for testing the A-to-B time interval measurement using the recommended instruments is described below. Connecting the Instruments • Check that the power switch is turned OFF on all instruments before connecting the instruments.
Page 211 • Set the frequency of the 8657B to the values given in the table below, and check that the measured values (mean value and standard deviation) are within the allowable range using the A-to-B time interval measurement function on the TA720. Test Result •...
Page 212: Replacing The Power Fuse
The fuse inside the case cannot be replaced by the user. If you believe the fuse inside the case is blown, contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. The ratings of the fuse that is used inside the case are shown below.
Page 213: Recommended Replacement Parts
(items which wear out). The replacement period for expendable items varies depending on the conditions of use. Refer to the table below as a general guideline. Contact your nearest YOKOGAWA dealer for replacement parts. Parts Name Recommended Replacement Period Built-in printer Under normal usage, 120 rolls of paper (part No.: B9850NX)
Page 214: Chapter 15 Specifications
Chapter 15 Specifications 15.1 Signal Input and Trigger Item Specifications Number of input channels 2 (CH A and CH B) Input coupling DC/AC Input connector BNC connector Input impedance 50Ω/1 MΩ, 23pF (typical value Frequency characteristics • When the input coupling is DC: DC to 250 MHz (typical value •...
Page 215: Measurement Functions (Measurement Items)
15.2 Measurement Functions (Measurement Items) Item Specifications Measurement function • When in time stamp mode or hardware histogram mode • Single measurement function Period, A-to-B time interval, and pulse width • Dual measurement function Period A & period B, period A & A-to-B time interval, pulse width A & A-to-B time interval, and pulse width A &...
Page 216 15.2 Measurement Functions (Measurement Items) Item Specifications Pulse width measurement • Measurement range • When in time stamp mode: 6 ns to 20 ms • When in hardware histogram mode: 6 ns to 3.2 µs • When in inter-symbol interference analysis mode: 10 ns to 3.2 µs •...
Page 217 15.2 Measurement Functions (Measurement Items) Item Specifications Pulse A & A-to-B time • Measurement range interval measurement and • Time stamp mode or inter-symbol interference analysis mode pulse A→A-to-B time Pulse width measurement: 6 ns to 20 ms, A-to-B time interval measurement: 0 ns to 20 ms interval measurement •...
Page 218: Gate, Arming, And Inhibit
15.3 Gate, Arming, and Inhibit The specifications for inter-symbol interference analysis mode conform to the specifications for time stamp mode. Item Specifications Gate • Gate types: Select from EVENT, TIME, and EXTERNAL When using the dual measurement function , the measurement terminates when the gate of each measurement closes.
Page 219: Block Sampling
15.4 Block Sampling Item Specifications Selectable range of the • Time stamp mode number of blocks • When the arming source is EXT and the rest mode is OFF or when the arming source is AUTO and the rest mode is event or time: 2 to 250 •...
Page 220 15.6 Display Item Specifications Histogram display • Scale: Sets the X-axis and Y-axis of the histogram • Selectable range of X center (X-axis center) When in time stamp mode: –50 ns to 20.000000000 ms (resolution: 25 ps) When in hardware histogram mode: –50 ns to 3.2000000 µs (resolution: 25 ps) •...
Page 221: Auto Window Function
15.6 Display/15.7 Auto Window Function/15.8 Rear Panel Input/Output Item Specifications Statistics display • When in time stamp mode When the calculated item is histogram Statistical calculation parameters: Average, Maximum, Minimum, Peak-Peak, σ, σ/Average, σ/T, Deviation, Deviation/T, Median, Mode, Number When calculation item is time variation Statistical calculation parameters: T.Average, T.Maximum, T.Minimum, T.Peak-Peak, T.σ, T.(σ/ Average), T.(P-P/Average), T.RF, and T.Number •...
Page 222: Gp-Ib Interface
15.9 GP-IB Interface Item Specifications Interface GP-IB Electrical and mechanical Conforms to IEEE St’d 488-1978 (JIS C 1901-1987). specifications Mechanical specifications SH1, AH1, T6, L4, SR1, RL1 PP0, DC1, DT1, C0 Protocol Conforms to IEEE St’d 488.2-1992 Code ISO (ASCII) code Mode Addressable mode Address...
Page 223: Pc Card Drive (Optional)
*1 There is also another fuse inside the unit, but the user cannot replace it. If you believe the fuse inside the unit is blown, contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. 15-10...
Page 224: External Dimensions
15.17 External Dimensions Unit: mm Rear View GP-IB(IEEE488) MONITOR PROBE POWER (50 ) ( 12V) 10MHz REF IN (1Vp-p) REFERENCE ADJUST 1Vp-p ETHERNET 10MHz OUT LINK 10BASE - T (1Vp-p) 100-240V AC GATE OUT 250VA MAX (TTL) 50/60Hz WARNING FUSE 250V T 3.15A Do not operate without reading safety precautions in user s manual MODE...
Page 225 Index Calibration Data Lost ............14-8 Symbols Center ............ 7-7, 8-3, 8-4, 8-5, 8-8 ChA ................... 6-12 .CSV ................11-16 Channel ................ 5-2, 5-5 .SET .................. 11-8 ChB ................... 6-12 1-7 ................2-18, 8-7 click sound ..............13-10 10-MHz output ............2-26, 13-6 color ..............
Page 226 Index event gate ................2-8 INPUT key ................1-3 Ext ................6-6, 6-15 installation condition ............3-3 EXT ARM/EXT GATE ..........6-2, 6-6 installation position .............. 3-4 External ................ 2-8, 6-1 Int ..................6-15 external arming ............2-9, 6-6 inter-symbol interference analysis mode ... 2-4, 2-24, 5-1, 9-5, external arming input ............
Page 227 Index MODE key ................1-3 rear panel ................1-2 MODEL .................. ii recall ............. 2-26, 10-2, 11-6, 11-9 Modulation ..............8-6, 8-7 recommended replacement parts ........14-22 monitor output ............2-26, 13-8 REF IN ................6-15 Movement ................. 8-12 Ref. Clock ..............2-12, 6-15 multi window ............
Page 228 Index Symbol ................8-14 X-axis span selection ............8-11 symbol search ............2-20, 8-14 X1&X2 ................8-12 Sync ..................9-5 sync function ..............2-25 sync pattern ............2-20, 8-14 system configuration ............2-2 Y Axis ..............2-13, 8-10 system icon ................. 1-5 Y Center ................

YOKOGAWA TA720 User Manual

Table of Contents

Chapter 1 Names and Functions of Parts

Chapter 2 Explanation of Functions

Chapter 3 Before Starting Measurements

Chapter 4 Common Operations

Chapter 5 Setting the Sampling Mode and Measurement Function

1 5.5 Setting the Period a & Period B Measurement

Chapter 7 Basic Display Setup

Chapter 8 Detailed Display Setup

Chapter 9 Statistical Calculation and Inter-Symbol Interference Analysis

Chapter 10 Storing Setup Information to the Internal Memory and Recalling

Chapter 6 Setting Measurement

Chapter 11 Saving/Recalling Data and Outputting Screen Images

Chapter 12 Ethernet Communications (Option)

Chapter 13 Other Functions

Chapter 14 Troubleshooting and Maintenance

Chapter 15 Specifications

Quick Links

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Table of Contents