Page 1 Digital Jitter Meter IM 704420-01E 1st Edition...
Page 2 Keep this manual in a safe place for quick reference in the event a question arises. The following two manuals, including this one, are provided as manuals for the TA120E. If you purchased a TA120E with option functions, read both manuals.
Page 3: Checking The Contents Of The Package
EXT I/O Level measurement function /BP1 BI-PHASE measurement function * For information regarding options, see the TA120E Digital Jitter Meter Option Function User’s Manual (IM704420-51E). NO. (Instrument number) When contacting the dealer from which you purchased the instrument, please quote the instrument number.
Page 4 This manual * Included only when “EXT I/O” is specified as an option. Optional Accessories (Sold Separately) The optional accessories below are available for purchase separately. For information and ordering, contact your nearest YOKOGAWA dealer. Part Name Model Quantity Notes...
Page 5: 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 6 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 7: How To Use This Manual
How to Use This Manual Structure of the Manual The User’s Manual consists of the following sections: Chapter 1 Explanation of Functions Describes the functions of the instrument. Operating procedures are not given in this chapter. However, reading this chapter will help you understand the operating procedures given in the chapters that follow.
Page 8 How to Use This Manual Conventions Used in this Manual Displayed characters • Characters enclosed with [ ] mainly refer to characters or setting values that are displayed on the panel. • SHIFT+key means you will press the SHIFT key to turn ON the indicator that is located above and to the left of the SHIFT key followed by the key.
Page 9 How to Use This Manual Digital Numbers and Characters Because the TA120E uses a 7-segment LED display, numbers, alphabets, and operation symbols are represented using the special characters below. Some of the characters are not used. ^(Exponent) Lowercase c Lowercase h –...
Page 10: Table Of Contents
Contents Checking the Contents of the Package ................... ii Safety Precautions ......................... iv How to Use This Manual ........................ vi Chapter 1 Explanation of Functions System Configuration and Block Diagram ............... 1-1 Measurement Principle ....................1-4 Measurement Functions (Measurement Items) ............... 1-5 Acquisition Conditions for the Input Signal Being Measured ...........
Page 11 Contents Chapter 7 Outputting Signals, Initializing Setup Information, and Setting Key Lock Setting the DC Output ...................... 7-1 Outputting Other Signals ....................7-6 Backing Up the Setup Information ................... 7-8 Initializing the Setup Information ..................7-9 Displaying the Version Information ................. 7-11 Key Lock .........................
Page 12 Contents Chapter 9 Troubleshooting and Maintenance Troubleshooting ........................ 9-1 Error Code Description and Corrective Actions ............... 9-2 Adjusting the Zero Position of the Needle ................ 9-5 Performing a Self-Test ...................... 9-6 Performing Calibration (Changing the Factory Default Calibration Value) ......9-9 Executing the Performance Test ..................
Page 13: Chapter 1 Explanation Of Functions
Chapter 1 Explanation of Functions System Configuration and Block Diagram System Configuration • Remote control • Data acquisition and analysis Communications Input inhibit signal Input external arming signal Input EXT I/O signal DATA TRIG DC output of jitter Monitor output of RF signal Monitor output of equalized RF signal Data signal (binarized signal) output Input signal...
Page 14 *3 EXT I/O option CLOCK Buffer Signal Flow The TA120E is a jitter meter for optical disks. It measures the 3T jitter and D-to-C jitter of optical disks that employ the EFM method. The amplitude of the RF signal that is input through the RF input connector (RF IN) is equalized (made into ON/OFF signals) by the equalizer.
Page 15 In addition, the measurement result is als output from the EXT I/O terminal * For details on the functions and operations, see the TA120E Digital Jitter Meter Option Functio User’s Manual (IM704420-51E) IM 704420-01E...
Page 16: Measurement Principle
Measurement Principle Pulse Width of the 3T Data Signal of a CD The time shorter than the period of the reference clock is called the fractional time. In general, since the 3T data signal and the reference clock are not synchronized, fractional time exists both at the beginning and at the end of measurements.
Page 17: Measurement Functions (Measurement Items)
Measurement Functions (Measurement Items) 3T Jitter «See 4.1 for the operating procedure» 3T measurement Measures the pulse width from the rising edge of the slope* to the next falling edge of the slope (positive side) or from the falling edge of the slope to the next rising edge of the slope (negative side) of the 3T data signal of a compact disk (CD).
Page 18 1.3 Measurement Functions (Measurement Items) D-to-C Jitter «See 4.1 for the operating procedure» Time difference measurement Measures the time difference between the rising (or falling) edge of the data signal to the first rising (or falling) edge of the clock signal of a digital versatile disk (DVD). •...
Page 19: Acquisition Conditions For The Input Signal Being Measured
The binarized data signal of the RF signal is the signal used to measure the pulse width and time difference. Using the slicer of the TA120E, the RF signal is binarized by setting the portion of the signal that is greater than the given slice level* to the positive side and the portion that is less than the slice level to the negative side.
Page 20 1.4 Acquisition Conditions for the Input Signal Being Measured Trigger Mode and Slice Level «See 4.3 for the operating procedure» When measuring the pulse width or time difference of a single pulse, you can select the level of the data signal at which to make the measurement (activate the trigger). Slice level refers to the level at which the RF signal is binarized.
Page 21 Auto arming (internal arming) The internal signal of the TA120E is the arming source. Arming is the cue used to start the first measurement (the first trigger). External arming Arming is activated when an external signal (arming source) is applied to the external arming input connector.
Page 22 1.4 Acquisition Conditions for the Input Signal Being Measured Inhibit «See 4.6 for the operating procedure» You can inhibit measurements by applying an external signal to the INHIBIT input connector. This is possible even while the gate is open or during measurement after arming activation.
Page 23 The clock signal that is necessary in measuring the D-to-C jitter can be regenerated by the PLL circuit of the TA120E. You can also measure the time difference by applying a DVD clock signal to the clock input connector instead of regenerating the clock signal using the PLL circuit.
Page 24: Display
“d-oFF” can be displayed instead of these values. Specified value display When specifying values for setting up the TA120E such as manual setting of ×N speed, manual setting of gate time, arming delay setting, slice level setting when the...
Page 25: Signal Output
Signal Output DC Output of Jitter «See 7.1 for the operating procedure» The jitter ratio of the selected measurement function can be converted to DC voltage (0 V to 5 V) and output from the jitter DC output connector on the rear panel. You can also change the jitter ratio that corresponds to 0 V and 5 V.
Page 26: Other Functions
OFF. If the setup information can no longer be stored due to a dead lithium battery, the TA120E is reset to the factory default settings. Initializing Setup Information «See 7.4 for the operating procedure»...
Page 27: Chapter 2 Names And Uses Of Parts
Sets the polarity or slope of the data signal and the equalizer TRIG key (sections 4.1 and 4.2) Sets the trigger mode and slice level (section 4.3) * See the TA120E Digital Jitter Meter Option Function User's Manual (IM704420-51E). IM 704420-01E...
Page 28: Rear Panel
Warning and caution plate Safety precautions (pages iv and v) Precautions on the use of the instrument (section 3.1) KEY LOCK switch Turns ON/OFF the key lock (section 7.6) * See the TA120E Digital Jitter Meter Option Function User's Manual (IM704420-51E). IM 704420-01E...
Page 29: Chapter 3 Measurement Preparation And Common Operations
Do not remove the cover from the instrument. Some sections inside the instrument have high voltages that are extremely dangerous. For internal inspection or adjustment, contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. Abnormal behavior Stop using the instrument if there are any symptoms of trouble such as strange odors or smoke coming from the instrument.
Page 30 3.1 Precautions on the Use of the Instrument General Handling Precautions Do not place objects on top of the instrument Never place any objects containing water on top of the instrument. Water spills can lead to malfunction. Do not apply shock or vibration to the instrument Shock or vibration can lead to malfunction.
Page 31: Installing The Instrument
Note The specification of the meter presumes that the TA120E is installed horizontally and that the meter is in the vertical position. The specifications of the meter cannot be satisfied when the instrument is installed with the rear panel down.
Page 32 • A place with a lot of dust, trash, salt, or iron powder. • A place where water, oil, or chemicals splash. We strongly recommend you store the TA120E in an environment with a temperature between 5°C and 40°C and a relative humidity between 20% to 80% RH.
Page 33 Install the instrument horizontally. Note It is possible to install the TA120E with the stand in the upright position. However, note that the specification of the meter presumes that the TA120E is installed horizontally and that the meter is in the vertical position. When using the stand, pull the stand forward until it locks (perpendicular to the bottom surface of the instrument).
Page 34: Connecting The Power Supply
• Check that the power switch is turned OFF before connecting the power cord. • To prevent the possibility of electric shock or fire, be sure to use the power cord supplied by YOKOGAWA. • Make sure to perform protective grounding to prevent the possibility of electric shock.
Page 35: Turning On/Off The Power Switch
The setup conditions are restored to the ones that existed immediately before the power switch was turned OFF. Note If the TA120E does not operate as described above when the power switch is turned ON, turn OFF the power switch and check the following points: •...
Page 36: Connecting The Cable Or Probe
3.6. Failure to do so will cause unstable gain across different frequencies, thereby preventing correct measurement. Phase correction of the probe must be performed when the probe changes or the TA120E changes. IM 704420-01E...
Page 37: Phase Correcting The Probe
TA120E. Do not apply external voltage to the monitor output connector. This may cause damage to the internal circuitry. Check that the TA120E and DL1540 are turned OFF and connect them as shown in the figure. Using a BNC cable, connect the monitor output connector on the rear panel of the TA120E and the signal input connector of the DL1540.
Page 38 Consequently, a correct waveform cannot be input to the measurement circuit of the TA120E. 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 39: Setting The Numeric Value
You can set the numeric value within the range of each item. You can confirm that the TA120E is ready to accept numeric values when the SET indicator is ON and a single digit of the numeric value on the display is blinking.
Page 40: Chapter 4 Setting Measurement Conditions
Chapter 4 Setting Measurement Conditions Setting the Measurement Function «For a functional description, see section 1.3.» Keys Lights when the numeric values are shown on the display. Displays the ×N speed value when manually setting the ×N speed. MEAS UTILITY OPTION σ...
Page 41 4.1 Setting the Measurement Function Explanation There are two measurement functions: 3T jitter and D-to-C jitter. You must specify the conditions of the signal to be measured for each measurement function. Selecting 3T jitter The measurement range of 3T jitter is 2.5T to 3.5T (T = 231.385 ns/N, where N is the ×N speed value).
Page 42 The TA120E retains setup information of the measurement conditions for each measurement function (×1, ×N, DtoC). However, the setup items that are common on the TA120E such as the ON/OFF condition of the numeric display (see section 5.2), the ON/OFF condition of key lock (see section 7.6), and GP-IB address (see section 8.4) are the same.
Page 43: Turning On/Off The Equalizer
By equalizing the RF signal, you can make more accurate measurements. Note The frequency characteristics of the equalizer built into the TA120E comply with the characteristics of the single-speed DVD specification (JIS X 6241 : 1997). IM 704420-01E...
Page 44: Setting The Trigger Mode And Slice Level
Setting the Trigger Mode and Slice Level «For a functional description, see section 1.4.» Keys Lights when the numeric values are shown on the display. When setting the slice level, the slice level value is displayed. MEAS UTILITY OPTION σ σ...
Page 45 4.3 Setting the Trigger Mode and Slice Level Explanation When measuring the pulse width or time difference of a single pulse, you can select the level of the data signal at which to make the measurement (activate the trigger). Slice level refers to the signal level used to binarize the RF signal.
Page 46: Setting The Gate
Setting the Gate «For a functional description, see section 1.4.» Keys Lights when the numeric values are shown on the display. When manually setting the gate time, the gate time is displayed. MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD...
Page 47 4.4 Setting the Gate Explanation You can set the number of measured values (number of events) of the pulse width or time difference to be stored in the acquisition memory or the period (gate time) over which the measured values are stored in the acquisition memory. Selecting the gate •...
Page 48: Setting The Arming
Setting the Arming «For a functional description, see section 1.4.» Keys Lights when the numeric values are shown on the display. When setting the arming delay, the delay time is displayed. MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s...
Page 49 Selecting auto arming (internal arming) If you turn OFF both the indicators, auto arming is activated. The internal signal of the TA120E is the arming source. Arming is the cue used to start the first measurement (the first trigger). Setting external arming Arming is activated when an external signal (arming source) is applied to the external arming input connector.
Page 50 510 Ω (External arming input connector) (TTL) 74LS14 or equivalent 10 kΩ CAUTION Do not apply a voltage that exceeds the allowable input voltage range to the external arming input connector. This may cause damage to the TA120E. 4-11 IM 704420-01E...
Page 51: Setting Inhibit
Setting Inhibit «For a functional description, see section 1.4.» Keys MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s DtoC SPEED GATE TIME DELAY FUNC GATE REMOTE SHIFT GP-IB LOCAL EQLZ LEVEL DATA TRIG CLOCK PHASE PHASE AUTO MAN PRESET SCALE...
Page 52 INHIBIT 510 Ω (Inhibit input connector) (TTL) 74LS14 or equivalent 10 kΩ CAUTION Do not apply a voltage that exceeds the allowable input voltage range to the inhibit input connector. This may cause damage to the TA120E. 4-13 IM 704420-01E...
Page 53: Switching The Clock Signal (Applicable To D-To-C Jitter Measurements)
Switching the Clock Signal (Applicable to D-to- C Jitter Measurements) «For a functional description, see section 1.4.» Keys MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s DtoC SPEED GATE TIME DELAY FUNC GATE REMOTE SHIFT GP-IB LOCAL EQLZ LEVEL...
Page 54 Adjusting the Phase Difference between the Data Signal and the Clock Signal (Applicable to D-to-C Jitter Measurements) «For a functional description, see section 1.4.» Keys Lights when the numeric values are shown on the display. When adjusting the phase of the clock signal, the adjusted value is displayed.
Page 55: Chapter 5 Displaying The Measured Results
For a description on how to use the analog meter when it is indicating the phase difference, see section 4.8. • The minimum interval for measuring jitter on the TA120E is 50 ms. In some cases, the analog meter may not be able to keep up with the changes in the measured value. •...
Page 56: Displaying The Numeric Value And Turning Off The Numeric Display
Displaying the Numeric Value and Turning OFF the Numeric Display «For a functional description, see section 1.5.» Keys Lights when the numeric values are shown on the display. The measured results are displayed using numeric values. The indicator of the selected unit lights. MEAS UTILITY OPTION...
Page 57 Even when the numeric display is turned OFF, the display shows the setup values when setting the TA120E. For the setup procedure, see chapter 4. Error codes and version information are also shown on the display even when the numeric display is turned OFF.
Page 58: Chapter 6 Storing And Recalling Setup Information
The number of sets that can be stored (preset number) is seven from 0 to 6. Note If you initialize all setup information of the TA120E to factory default settings (see section 7.4), the stored setup information is also initialized. The setup information of all seven sets is reset to factory default settings.
Page 59: Recalling The Setup Information
Recalling the Setup Information Keys Lights when a preset number is shown on the display. The preset number is displayed when setting to recall the setup information. MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s DtoC SPEED GATE TIME DELAY...
Page 60: Chapter 7 Outputting Signals, Initializing Setup Information, And Setting Key Lock
Setting the DC Output «For a functional description, see section 1.6.» Connecting the Cable Connect a BNC cable to the jitter DC output connector on the rear panel of the TA120E. Keys Lights when the numeric values are shown on the display.
Page 61 7.1 Setting the DC Output Setting the determination level Press the SHIFT+<(UTILITY) key. The display shows the characters [init]. Turn the rotary knob to select [dcJdG]. Press the > key. The display shows the determination level. Use the rotary knob and arrow keys (< or >) to set the determination level. For the procedure to set numeric values, see section 3.7.
Page 62 7.1 Setting the DC Output Explanation Setup menu for DC output The following parameters are specified for the DC output. Use the SHIFT+<(UTILITY) key and the rotary knob to select the parameter you wish to set. dcout: Selects the DC output mode dc hi: Sets the upper limit of the jitter ratio output range dc Lo: Sets the lower limit of the jitter ratio output range dcJdG: Sets the determination level...
Page 63 CAUTION Do not apply external voltage to the output connector. This may cause damage to the TA120E. Setting the jitter ratio output range You can set the upper and lower limits of the jitter ratio output range. The upper and lower limits correspond to 5 VDC and 0 VDC, respectively.
Page 64 The DC output is 5 V when the trigger is not activated for the input signal and measurements cannot be made. • If the TA120E becomes unlocked (see section 4.7), the DC output is set to 5 V. IM 704420-01E...
Page 65: Outputting Other Signals
Outputting Other Signals CAUTION Do not apply external voltage to the output connector. This may cause damage to the TA120E. Connecting the Cable Connect a BNC cable to the appropriate output connector on the rear panel of the TA120E. Monitor output of RF signals or monitor output of equalized RF signals You can output the RF signal that is applied to the RF input connector directly to the monitor output on the rear panel.
Page 66 7.2 Outputting Other Signals Outputting the data signal You can output the data signal obtained through the binarization of the RF signal from the data signal output connector on the rear panel at TTL levels. Item Specifications 50 Ω (typical value*) Output impedance Output level TTL level given that the monitor equipment receives the signal at high...
Page 67: Backing Up The Setup Information
ON, the TA120E starts the measurement using the settings that existed immediately before the power switch was turned OFF. If the setup information can no longer be stored due to a dead lithium battery, the TA120E is reset to the factory default settings. For factory default settings, see section 7.4.
Page 68: Initializing The Setup Information
Initializing the Setup Information There are two methods of initializing the setup information. Keys MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s DtoC SPEED GATE TIME DELAY FUNC GATE REMOTE SHIFT GP-IB LOCAL EQLZ LEVEL PHASE DATA TRIG CLOCK...
Page 69 7.4 Initializing the Setup Information Explanation The following setup information can be initialized to the factory default settings. Item Factory Default Settings Measurement Function Item under measurement D-to-C jitter Manual setting of the ×N speed (3T jitter) Polarity of the data signal (3T jitter) Positive Slope of the data signal (D-to-C jitter) Rising slope...
Page 70: Displaying The Version Information
Displaying the Version Information Keys Lights when the version number is shown on the display. Displays the version number when displaying the version information. MEAS UTILITY OPTION σ σ LOCK MEAS BI-PHASE 3TCD 0.5s 3TCD 0.1s DtoC SPEED GATE TIME DELAY FUNC GATE...
Page 71: Key Lock
• Turning ON/OFF the KEY LOCK switch Note • Key lock can be enabled even when the TA120E is in the remote mode through the communication function. • Operations in the maintenance mode (see sections 9.4 to 9.6) are available even when key lock is ON.
Page 72: About The Ieee.488.2-1992 Standard
Chapter 8 Communication Function About the IEEE.488.2-1992 Standard The GP-IB interface of the instrument conforms to the Items that are included in the functional or IEEE 488.2-1992 Standard. This standard specifies composite header elements constituting a that the 23 points listed below be stated in the command document.
Page 73 8.1 About the IEEE.488.2-1992 Standard (17) The size of the storage area for protected user data for *PUD and *PUD? commands *PUD *PUD? are not supported. (18) The length of the *RDT and *RDT? resource names *RDT *RDT? are not supported. (19) The change in the status due to *RST, *LRN?, *RCL, and *SAV *RST...
Page 74: Gp-Ib Interface Functions And Specifications
GP-IB Interface Functions and Specifications GP-IB Interface Functions GP-IB Interface Specifications Listener function • Electrical and mechanical specifications • All of the settings that you can enter with the Conforms to IEEE St’d 488-1978 panel keys can be set through the GP-IB •...
Page 75: Connecting The Gp-Ib Cable
Connecting the GP-IB Cable GP-IB Cable Precautions to Be Taken When Connecting the Cable The GP-IB connector used on this instrument is a 24- pin connector that conforms to the IEEE St’d 488.1- • Firmly tighten the screws on the GP-IB cable 1978.
Page 76: Setting The Address
Each device that can be connected via GP-IB has a unique address within the GP-IB system. This address is used to distinguish the device from others. When connecting the TA120E, you must select the GP-IB address of the TA120E. Range: 0 to 30...
Page 77: Responses To Interface Messages
Responses to Interface Messages What Is an Interface Message Responses to Interface Messages Interface messages are also referred to as interface Responses to a uni-line message commands or bus commands. They are commands • that are issued by the controller. They are classified Clears the talker and listener functions.
Page 78: Program Format
Program Format 8.6.1 Symbols Used in the Syntax 8.6.2 Messages The following table contains symbols that are used for Messages syntax, mainly in section 8.7. These symbols are referred to as symbols. For Messages are used to exchange information between BNF (Backus-Naur Form) details on the data, see pages 8-11 to 8-13.
Page 79 8.6 Program Format <PMT> Response Messages PMT is a program message terminator. The following Data that are sent from the instrument to the controller three types of terminators are available. are called response messages. The response • (New Line) message format is shown below. Same as (Line Feed).
Page 80: Commands
8.6 Program Format 8.6.3 Commands Precautions to Be Taken when Transferring Messages Commands • If a program message that does not contain a query is sent, the next program message can be sent at There are three types of commands (program headers) any time.
Page 81 8.6 Program Format When Concatenating Commands When separating commands with <PMT> If a terminator is used to separate two commands, Command group each command is a separate message. Therefore, A command group is a group of commands that the common header must be specified for each have common compound headers arranged in a command even when commands belonging to the hierarchy.
Page 82: Responses
8.6 Program Format 8.6.4 Responses 8.6.5 Data Data When the controller sends a message unit that has a question mark ( ) in its program header (query), the Data contain conditions and values that are written instrument returns a response message to the query. after the header.
Page 83 8.6 Program Format <Voltage>, <Time>, <Phase>, <Percent> <Register> <Voltage>, <Time>, <Phase>, and <Percent> indicate <Register> indicates an integer that can be expressed decimal values that have physical dimensions. not only in <Decimal> notation, but also <Multiplier> or <Unit> can be attached to the <NRf> , or <Hexadecimal>...
Page 84: Synchronization With The Controller
8.6 Program Format 8.6.6 Synchronization with the <Character String Data> Controller Unlike the predefined character strings of <Character data>, <Character string data> is an arbitrary character string. The character string is enclosed in single This instrument does not support overlap commands, quotation marks ( ) or double quotation marks ( "...
Page 85 0 of the extended event register is set to “ .” Note On the TA120E, the statistical data can be read during measurement without having to synchronize with the controller. The value queried in this case is the previous statistical value. Example CALCulation:JITTer?<PMT>...
Page 86: Commands
Commands 8.7.1 A List of Commands Command Function Page CALCulation Group Queries the average value. 8-18 :CALCulation:AVERage? :CALCulation:ELERror? Queries the Effect Length Error. 8-18 Queries the σ/AVE value. :CALCulation:FLUTter? 8-18 Queries the jitter ratio. 8-18 :CALCulation:JITTer? :CALCulation:MAXimum? Queries the maximum value. 8-18 :CALCulation:MELE? Queries the MELE value.
Page 87 8.7 Commands Command Function Page MEASure Group Queries all settings related to the measurement. 8-25 :MEASure? :MEASure:FUNCtion Sets the measurement function or queries the current setting. 8-25 Sets the ×N speed or queries the current setting. :MEASure:SPEed 8-25 MEMory Group Queries all settings related the external transmission of the measured data.
Page 88 8.7 Commands Command Function Page UNIT Group :UNIT? Queries the default unit of voltage and time. 8-33 :UNIT:TIME Sets the default unit of time or queries the current setting. 8-33 :UNIT:VOLTage Sets the default unit of voltage or queries the current setting. 8-33 Common Command Group *CAL?
Page 89: Calculation Group
8.7 Commands 8.7.2 CALCulation Group The commands in this group deal with statistics. For details on setting the statistical equation, see the next page. :CALCulation AVERage ELERror FLUTter JITTer MAXimum MELE MINimum PHASe PTOPeak SDEViation SNUMber TVALue : C A L C u l a t i o n : A V E R a g e ? : C A L C u l a t i o n : A V E R a g e ? : C A L C u l a t i o n : A V E R a g e ? : C A L C u l a t i o n : A V E R a g e ?
Page 90 8.7 Commands • Standard deviation (jitter σ) : C A L C u l a t i o n : S N U M b e r ? : C A L C u l a t i o n : S N U M b e r ? : C A L C u l a t i o n : S N U M b e r ? : C A L C u l a t i o n : S N U M b e r ? : C A L C u l a t i o n : S N U M b e r ?
Page 91: Communicate Group
8.7 Commands 8.7.3 COMMunicate Group The commands in this group deal with communications. :COMMunicate HEADer <Space> <NRf> VERBose <Space> <NRf> WAIT <Space> <Register> : C O M M u n i c a t e ? : C O M M u n i c a t e ? : C O M M u n i c a t e : W A I T : C O M M u n i c a t e : W A I T : C O M M u n i c a t e ?
Page 92: Dcout Group
8.7 Commands 8.7.4 DCOut Group The commands in this group deal with DC output of the jitter ratio. :DCOut MODE <Space> JITTer JUDGe JITTer COEFfcient <Space> <NRf> <NRf> CYCle <Space> <NRf> RANGe <Space> <NRf> <NRf> JUDGe LEVel <Space> <NRf> RESult : D C O u t ? : D C O u t ? : D C O u t ?
Page 93: Display Group
8.7 Commands : D C O u t : J U D G e : R E S u l t ? : D C O u t : J U D G e : R E S u l t ? : D C O u t : J U D G e : R E S u l t ? : D C O u t : J U D G e : R E S u l t ? : D C O u t : J U D G e : R E S u l t ?
Page 94: Input Group
8.7 Commands 8.7.6 INPut Group The commands in this group deal with the input signal. TRIGger :INPut DATA MODE <Space> MANual AUTO BOTH LEVel <Space> <Voltage> POLarity <Space> POSitive NEGative BOTH CLOCk SLOPe <Space> RISE FALL TIME <Space> DELay <Time> MODE <Space>...
Page 95 8.7 Commands : I N P u t : D A T A : P O L a r i t y : I N P u t : D A T A : P O L a r i t y : I N P u t : D A T A : P O L a r i t y : I N P u t ? : I N P u t ?
Page 96: Measure Group
8.7 Commands : I N P u t : P L L [ : M O D E ] : I N P u t : P L L [ : M O D E ] : I N P u t : P L L [ : M O D E ] : I N P u t : P L L [ : M O D E ] : I N P u t : P L L [ : M O D E ] : I N P u t : P L L : S T A T u s ?
Page 97: Memory Group
FREQuency (histogram frequency data) BYTEORDER LSBFIRST • When the measurement function is set to “ ” (BI-PHASE measurement function WOBBle option, see the TA120E Digital Jitter Meter Option Function User’s Manual (IM704420- 51E)): TSTamp (measured time stamp) and MEASuredata (measured time data) 8-26...
Page 98 • 8-digit value 00100000: Indicates the number of transmitted data bytes. The number of Transmitted Range transmitted bytes is 10000. All the data that the TA120E is computing within the • ABCDEFGHIJ..: Indicates the actual number window range are transmitted. The transmitted range of data bytes.
Page 99: Recall Group
8.7 Commands 8.7.9 RECall Group :RECall <Space> <NRf> : R E C a l l : R E C a l l : R E C a l l : R E C a l l : R E C a l l Function Recalls the setup information.
Page 100: Sample Group
8.7 Commands 8.7.10 SAMPle Group The commands in this group deal with sampling conditions. :SAMPle ARMing SOURce <Space> AUTO EXTernal SLOPe <Space> RISE FALL DELay TIME <Space> <Time> GATE MODE <Space> EVENt TIME TIME <Space> <Time> INHibit STATe <Space> <NRf> POLarity <Space>...
Page 101: Sstart Group
8.7 Commands : S A M P l e : A R M i n g : S L O P e : S A M P l e : A R M i n g : S L O P e : S A M P l e : A R M i n g : S L O P e : S A M P l e : A R M i n g : S L O P e : S A M P l e : A R M i n g : S L O P e...
Page 102: Status Group
8.7 Commands 8.7.13 STATus Group The commands in this group deal with communication status. For a status report, see section 8.8. :STATus CONDition EESE <Space> <Register> EESR ERRor FILTer <x> <Space> RISE FALL BOTH NEVer QMESsage <Space> <NRf> : S T A T u s ? : S T A T u s ? : S T A T u s ? : S T A T u s ?
Page 103: Store Group
8.7 Commands 8.7.14 STOP Group :STOP : S T O P : S T O P : S T O P : S T O P : S T O P Function Stops the measurement. Syntax :STOP Example :STOP 8.7.15 STORe Group :STORe <Space>...
Page 104: Unit Group
8.7 Commands 8.7.16 UNIT Group The commands in this group deal with the default unit of voltage and time. :UNIT VOLTage <Space> <Multiplier> <Multiplier> TIME <Space> <Multiplier> <Multiplier> : U N I T ? : U N I T ? : U N I T ? : U N I T ? : U N I T ?
Page 105: Common Command Group
* C L S * C L S Syntax *IDN? Function Clears the standard event register, extended Example *IDN?→YOKOGAWA,704420,0,F1.01 event register, and error queue. Description A reply is returned in the following form: Syntax *CLS manufacturer, model, serial number (always 0), Example *CLS firmware version.
Page 106 8.7 Commands * R S T * R S T * R S T * R S T * R S T Function Initializes the setup information. Syntax *RST Example *RST Description For details on initialization, see section 7.4. The GP-IB address is not initialized.
Page 107: Status Report
Status Report 8.8.1 About the Status Report Status Report The figure shows the status report that is read by serial polling. This status report is an extended version of the status report defined in IEEE 488.2-1992. Service request enable register &...
Page 108: Status Byte
8.8 Status Report 8.8.2 Status Byte Summary of the Registers and Queues Name (Function) Write Read Status Byte Status byte — Serial polling *STB?(MSS) Service request *SRE *SRE? 6 ESB MAV EES EAV 1 enable register (Status byte mask) Standard event register —...
Page 109: Standard Event Register
8.8 Status Report 8.8.3 Standard Event Register Status Byte Operation A service request is issued when bit 6 of the status Standard Event Register byte becomes a “ .” Bit 6 is set to “ ” when any of the other bits becomes a “...
Page 110: Extended Event Register
8.8 Status Report 8.8 Status Report Standard Event Register Operation Reading the Standard Event Register Standard event register is a register for the eight types *ESR? command can be used to read the contents of events that occur inside the instrument. When any of the standard event register.
Page 111: Output Queue And Error Queue
8.8 Status Report 8.8.5 Output Queue and Error Queue Output Queue The output queue stores response messages for the queries. As shown in the example below, data are stored in order and read from the oldest ones first. The output queue is also cleared for the following cases: •...
Page 112: Sample Program
Standard module used: Niglobal.bas and Vbib-32.bas Settings on the TA120E All sample programs given in this chapter use GP-IB address of “1” for the TA120E. Set the GP-IB address to “1” according to the procedure in section 8.4. 8.9.2 Sample Program Image...
Page 113: Initialization, Error, And Functions For Execution
8.9 Sample Program 8.9.3 Initialization, Error, and Functions for Execution —————————————————————————————————————————————————————————————————————————————————— Option Explicit Dim StartFlag As Integer 'Start Flag Dim addr As Integer 'GPIB Address Dim Timeout As Integer 'Timeout Dim Dev As Integer 'Device ID(GPIB) Dim CtsFlag As Integer 'CTS Flag Dim term As String 'Terminator Dim Query(12) As String...
Page 114 8.9 Sample Program ElseIf (ern = EOIP) Then " " ers = EOIP:I/O operation started before previous operation completed ElseIf (ern = ECAP) Then " " ers = ECAP:No capability for intended operation ElseIf (ern = EFSO) Then " " ers = EFSO:File system operation error ElseIf (ern = EBUS) Then...
Page 115 8.9 Sample Program ————————————————————————————————————————————————————————————————————— Private Sub Command3_Click() Dim sts As Integer If (StartFlag = 1) Then Exit Sub End If StartFlag = 1 " " Text1.Text = START List1.Clear Dummy = DoEvents() sts = GetStatistics 'Run Sample3 Get Statistics If (sts = 0) Then List1.AddItem Query(0) List1.AddItem Query(1) List1.AddItem Query(2)
Page 116: Setting Measurement Parameters Or Querying The Setting
8.9 Sample Program 8.9.4 Setting Measurement Parameters or Querying the Setting Sample1 Set/Get Parameter ——————————————————————————————————————————————————————— Private Function SetParameter() As Integer Dim msg As String 'Command buffer Dim qry As String 'Query buffer Dim sts As Integer msg = Space$(100) qry = Space$(100) sts = InitGpib 'Initialize GPIB If (sts <>...
Page 117 8.9 Sample Program " " msg = :SAMPLE:GATE:MODE EVENT + term 'Gate = Event(100000) sts = ilwrt(Dev, msg, Len(msg)) 'Send Command If (sts < 0) Then Call DisplayGPIBError(sts, msg) SetParameter = 1 Exit Function End If " " msg = :SAMPle:GATE:MODE? + term 'Get Gate Mode...
Page 118 8.9 Sample Program " " msg = :INPUT:DATA:POLARITY BOTH + term 'Data Polarity = Both sts = ilwrt(Dev, msg, Len(msg)) 'Send Command If (sts < 0) Then Call DisplayGPIBError(sts, msg) SetParameter = 1 Exit Function End If " " msg = :INPUT:DATA:POLARITY? + term 'Get Data Polarity...
Page 119 8.9 Sample Program " " msg = :INPUT:PLL:MODE ON + term 'PLL = On sts = ilwrt(Dev, msg, Len(msg)) 'Send Command If (sts < 0) Then Call DisplayGPIBError(sts, msg) SetParameter = 1 Exit Function End If " " msg = :INPUT:PLL:MODE? + term 'Get PLL...
Page 120: Executing Single Measurement
8.9 Sample Program 8.9.5 Executing Single Measurement Sample2 Single Measure —————————————————————————————————————————————————————— Private Function SingleMeasure() As Integer Dim msg As String 'Command buffer Dim qry As String 'Query buffer Dim sts As Integer msg = Space$(100) qry = Space$(100) sts = InitGpib 'Initialize GPIB If (sts <>...
Page 121: Querying The Measurement Statistics
8.9 Sample Program 8.9.6 Querying the Measurement Statistics Sample3 Get Statistics —————————————————————————————————————————————————————— Private Function GetStatistics() As Integer Dim msg As String 'Command buffer Dim qry As String 'Query buffer Dim sts As Integer msg = Space$(100) qry = Space$(100) sts = InitGpib 'Initialize GPIB If (sts <>...
Page 122 8.9 Sample Program " " msg = :CALCULATION:MAXIMUM? + term 'Get Maximum value sts = ilwrt(Dev, msg, Len(msg)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function End If sts = ilrd(Dev, qry, Len(qry)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function...
Page 123 8.9 Sample Program " " msg = :CALCULATION:JITTER? + term 'Get Jitter value sts = ilwrt(Dev, msg, Len(msg)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function End If sts = ilrd(Dev, qry, Len(qry)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function...
Page 124 8.9 Sample Program " " msg = :CALCULATION:SNUMBER? + term 'Get Sample Number value sts = ilwrt(Dev, msg, Len(msg)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function End If sts = ilrd(Dev, qry, Len(qry)) If (sts < 0) Then Call DisplayGPIBError(sts, msg) GetStatistics = 1 Exit Function...
Page 125: Ascii Character Code
8.10 ASCII Character Code The following table shows the ASCII character codes: ‘ ” & ’ < > (RUBOUT) Address Universal Listener Talker Secondary command command address address command Example Octal GP-IB code ASCII character code Hexadecimal Decimal 8-54 IM 704420-01E...
Page 126: Chapter 9 Troubleshooting And Maintenance
Noise appears on the display. Install the TA120E where there is no noise.3.2 Remove the noise. — The ambient temperature or humidity Install the TA120E in a place that meets is outside the specifications. thespecifications. Keys do not work. Key lock is ON.
Page 127: Error Code Description And Corrective Actions
This section will describe the meanings of the messages and the corrective actions. If the corrective action indicates servicing, please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. Error Codes and Error Messages Error codes are shown on the display.
Page 128 9.2 Error Code Description and Corrective Actions Code Message Description and Corrective Action Section Character data not allowed <CHARACTER DATA> cannot be used. Write in a data form other than {...|...|...}. String data error There is no delimiter to the right of <STRING DATA>.
Page 129 9.2 Error Code Description and Corrective Actions Error in communication query Code Message Description and Corrective Action Section Query INTERRUPTED Query transmission was aborted. Check the order of transmission and reception. Query UNTERMINATED There is no response that can be transmitted. Check the order of transmission and reception.
Page 130: Adjusting The Zero Position Of The Needle
Adjusting the Zero Position of the Needle Keys MEAS σ σ LOCK MEAS PHASE PRESET SCALE POWER Procedure Check that the power switch is turned OFF. Adjust the needle by turning the adjustment trimmer with a flat-head screwdriver so that the needle is exactly over the zero line. Explanation When the zero position of the needle goes off alignment, you can adjust the needle position using the adjustment trimmer...
Page 131: Performing A Self-Test
Removing the signal cable Remove all cables that are connected to the TA120E (input and output cables) excluding the power cable and GP-IB cable. Make sure that the TA120E is not in the remote mode at this point. For the procedure in switching from remote mode to local mode, see section 8.2.
Page 132 Press the < key once. The characters [tEST] appear on the display and the TA120E returns to the start condition in the maintenance mode. Note When you wish to perform measurement again after the self-test, reboot the TA120E. IM 704420-01E...
Page 133 When performing self-test, remove all cables that are connected to the TA120E (input and output cables) excluding the power cable and GP-IB cable. If the TA120E is in the remote mode at this point, self-test cannot be performed. Switch from remote mode to local mode.
Page 134: Performing Calibration (Changing The Factory Default Calibration Value)
Removing the signal cable Remove all cables that are connected to the TA120E (input and output cables) excluding the power cable and GP-IB cable. Make sure that the TA120E is not in the remote mode at this point. For the procedure in switching from remote mode to local mode, see section 8.2.
Page 135 If the calibration fails to complete normally, [CoPY] is displayed and then [FAiL] is displayed. In this case, servicing is required. Please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual for repairs. Checking each of the calibration results •...
Page 136 Perform calibration when the allowable range is exceeded in the performance test described in section 9.6 or when parts of the TA120E are replaced. If a problem is detected during the calibration operation, please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual for repairs.
Page 137 Please quote this number when contacting your nearest YOKOGAWA dealer for repairs. Rebooting the system After calibration, check that the TA120E starts up normally and that it is ready to make measurements. Calibration using the GP-IB command You can perform calibration using a GP-IB command. In this case, connect the GP-IB cable.
Page 138: Executing The Performance Test
YOKOGAWA OUTPUT TRIG DATA RF input connector Instrument settings • TA120E Measurement function: 3TCD Trigger mode: MAN • 7651 Output level: 4.000 V, 0 V, and –4.000 V Note If noise is present due to the influence from the outside environment, connect a 1-µF capacitor between the signal line and ground.
Page 139 VL. Set the trigger level of the TA120E to 3.900 V. Increase the trigger level of the TA120E in 1-mV steps. Gradually increase the trigger level and record the voltage at which the RF signal input indicator blinks as VH.
Page 140 • Check that the power switch is turned OFF on all instruments before connecting them. • Connect the output of the synthesized signal generator to the RF input connector of the TA120E through the 50-Ω terminator. TA120E Synthesized signal generator...
Page 141 Read the standard deviation σ and the average value. Confirm that the values are within the allowable range. Set the output level and frequency of the 8657B and the speed of the TA120E according to the table below, then perform the test in a similar fashion.
Page 142 • Check that the power switch is turned OFF on all instruments before connecting them. • Connect the output of the synthesized signal generator to the RF input connector of the TA120E through the 50-Ω terminator. TA120E Synthesized signal generator...
Page 143 Set the output level of the 8657B to 360 mVrms and the frequency to 720 kHz. Set the speed of the TA120E to [1.0] and the polarity of the data signal to Read the standard deviation σ and the average value. Confirm that the values are within the allowable range.
Page 144 • Connect the output of the synthesized signal generator to the RF input connector of the TA120E through the power divider and 50-Ω terminators. The cables used to connect the power divider to the RF input and clock input connectors of the TA120E must be the same length.
Page 145 Read the standard deviation σ. Confirm that the value is within the allowable range. Set the slope of the data signal of the TA120E, the slope of the clock signal, and the phase difference according to the table below, then perform the test in a similar fashion.
Page 146 • Check that the power switch is turned OFF on all instruments before connecting them. • Connect the output of the synthesized signal generator to the RF input connector of the TA120E through the 50-Ω terminator. TA120E Synthesized signal generator...
Page 147 Determine the ratio of the amplitude for 5.16 MHz and 10 MHz with respect to the amplitude for 300 kHz with the TA120E set to the equalizer test mode within the maintenance mode. Confirm that the ratios are within the allowable range shown in the table below.
Page 148 TA120E FG300 DATA TRIG OUTPUT RF input connector Instrument settings • TA120E • Measurement function: 3TCD(×N) • Polarity of the data signal: • Speed (N): 6.2 • Gate: 0.1 s • Trigger mode: MAN, AUTO • Slice level: 0.000 V •...
Page 149 σ. Confirm that the value is within the allowable range. The average value is reference value. Set the polarity of the data signal and the trigger mode of the TA120E according to the table below, then perform the test in a similar fashion.
Page 150 TA120E FG300 DATA TRIG OUTPUT RF input connector Instrument settings • TA120E • Measurement function: D-to-C • Polarity of the data signal: • Gate: 0.1 s • Trigger mode: AUTO • PLL: ON • FG300 • Output frequency: 74.04665 kHz •...
Page 151 • Set the frequency of the FG300 to 74.04665 kHz and confirm that the standard deviation σ (jitter) under the D-to-C jitter measurement of the TA120E is within the allowable range in the table. The average value is reference value.
Page 152: Adjusting The Equalizer
• Connect the output of the synthesized signal generator to the RF input connector of the TA120E through the 50-Ω terminator. • Connect the output of the monitor output connector (EQUALIZED RF/MONITOR OUT) of the TA120E to the spectrum analyzer. MS2601 TA120E...
Page 153 B. Turn the equalizer adjustment trimmer (EQLZ ADJUST) on the rear panel of the TA120E using a flat-head screwdriver and adjust the B value so that B – A is within 3.2 ± 0.1 dB. The equalizer adjustment trimmer is located inside the case.
Page 154: Circuit Breaker
For the position of the circuit breaker, see section 2.2. Circuit breaker operation If the TA120E becomes overloaded and over current flows through the internal circuits, the power is shut off. When the power is shut off, the reset button pops out (see figure below) and the white indicator section becomes exposed.
Page 155: Recommended Replacement Parts
(items which wear out), nor any other items. 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 Specifications and Recommended Replacement Period Equalizer relay Relay that operates on the ON/OFF condition of the equalizer.
Page 156: Chapter 10 Specifications
It cannot be applied to the clock signal that is regenerated by the built-in PLL circuit. *5 If the frequency characteristics of the equalizer is tested using the peak value measurement function of the TA120E as described in “Equalizer Test” in section 9.6, “Executing the Performance Test,” the value is 3.2 ± 0.7 dB.
Page 157: Measurement Function
Arming Arming source Internal arming The internal signal of the TA120E becomes the arming source. External arming The external signal applied to the external arming input connector (EXT ARM IN) becomes the arming source. For the specifications of the input connector, see section 10.6.
Page 158: Display
10.4 Display Item Specification Display type Meter (needle) 7-segment LED display (Function to turn ON/OFF the display of the measured results available).) Unit Meter: % Display: % (jitter ratio) or ns (jitter and average value). Meter scale Select 10% or 20% for the full scale (FS). Indication accuracy of the meter ±1.5% of FS Resolution of the display For % unit: 0.01%...
Page 159: Input/Output On The Rear Panel
10.6 Input/Output on the Rear Panel Item Specification External arming input (EXT ARM IN) Connector type Input impedance 10 kΩ (typical value Input coupling Input level TTL level Allowable input voltage –8 V to 13 V (DC+ACpeak) range Minimum pulse width 30 ns Setup time 0 ns (possible even when the external arming and data signals are simultaneous.)
Page 160: Gp-Ib Interface
10.7 GP-IB Interface Item Specification Electrical and mechanical Conforms to IEEE St’d.488-1978 (JIS C1901-1987). specifications Functional specifications SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, and C0 Protocol Conforms to IEEE St’d.488.2-1992. Code ISO (ASCII) code Mode Addressable mode Address 0 to 30 Clear remote mode...
Page 161: General Specifications
10.8 General Specifications Item Specification Standard operating conditions Ambient temperature 23±5°C Ambient humidity 50±10% RH Error in supply voltage and Within 1% of rating frequency Warm-up time Approx. 30 minutes. Storage conditions Temperature –20°C to 60°C Humidity 20% to 80% RH (no condensation) Operating conditions Temperature 5°C to 40°C...
Page 162: Dimensional Drawings
10.9 Dimensional Drawings Unit: mm Rear view 15.0 27.0 ±1 Mounting dimensions of the JIS rack mount ±1 Mounting surface ±1 ±1 Mounting surface Mounting dimensions of the EIA rack mount ±1 ±1 Mounting surface ±1 ±1 Mounting surface Caution: Make sure to have adequate support for the bottom of the instrument. Allow at least 80 mm of space around the instrument for ventilation.
Page 163 Index Symbols ×N speed ..............1-5, 4-2 D-to-C jitter ..............1-6, 4-2 3T jitter ................. 1-5, 4-2 data ................... 8-11 DATA key ................2-1 data signal output .............. 1-13 data signal output connector ..........2-2 dc hi ..................7-1 adjusting the phase difference .......... 1-11 dc Lo ...................
Page 164 Index monitor output ............1-13, 7-6 monitor output connector ............ 2-2 multi-line message .............. 8-6 handle ................. 2-1 multiplier ................8-12 header interpretation rule ..........8-10 name of part ................ 2-1 indicating the jitter ratio ............5-1 name plate ................2-2 indicator test ................
Page 165 Index safety precaution ............iv, 3-1 sample program ..............8-41 scale ..................5-1 SCALE key ................2-1 selecting 3T jitter ..............4-2 selecting D-to-C jitter ............4-2 self-test ................1-14 setting the numerical value ..........3-11 setup indicator ..............2-1 SHIFT key ................

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704420

YOKOGAWA TA120E User Manual

Chapter 1 Explanation of Functions

Chapter 2 Names and Uses of Parts

Chapter 3 Measurement Preparation and Common Operations

Chapter 4 Setting Measurement Conditions

Chapter 5 Displaying the Measured Results

Chapter 6 Storing and Recalling Setup Information

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

Chapter 8 Communication Function

Chapter 9 Troubleshooting and Maintenance

Chapter 10 Specifications

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