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5-2 Maintenance

KJM6710

5.4

Troubleshooting

The symptoms listed below may not necessarily mean a malfunction.

Check the KJM6710 before requesting repairs.
If the remedy does not solve the problem or if your case does not

match any of the items, contact your Kikusui agent.

Table 5-1

Symptom

Check Items

Description

The KJM6710
does not oper-
ate even when
the power
switch is
turned on.

Is the line voltage
correct?

The allowable line voltage range is
14.5 V to 15.5 V. The line voltage may
drop if the power supply capacity is
insuf

cient.

Is the DC voltage polarity
correct?

For safety reasons, the fuse is
designed to blow when the DC voltage
polarity is reversed. If the fuse is
blown, request for repairs.

Cannot make
measurements.

Is the input amplitude
adequate?

The input impedance must be 50

Ω

and the input amplitude must be at
least 0.2 Vp-p. 1-M

Ω

probes cannot

be used.

Is the output impedance
correct?

Check that the output impedance of
the connected device and the cable
impedance are 50

Ω

Is the duty cycle of clock
signal outside the speci

cations?

The duty cycle speci

cation of the

clock signal is 45:55 to 50:50.

PLL does not
lock.

If the frequency correct?

The PLL of the KJM6710 can lock to
fundamental clock frequencies
between 25 MHz to 30 MHz.

Is the amount of jitter too
large?

The PLL of the KJM6710 can lock up
to 17 %.

Содержание KJM6710

Страница 1: ...KJM6710 Part No Z1 003 052 IA003141 Jan 2004 OPERATION MANUAL Time Interval Jitter Meter ...

Страница 2: ... be provided for a fee In either case please contact Kikusui distributor agent and provide the Kikusui Part No given on cover This manual has been prepared with the utmost care however if you have any ques tions or note any errors or omissions please contact Kikusui distributor agent Microsoft and Visual Basic are registered trademarks of Microsoft Corp U S A Reproduction and reprinting of this op...

Страница 3: ...nly after you make sure that no voltage is output here Indicates an imminently hazardous situation which if ignored will result in death or serious injury Indicates a potentially hazardous situation which if ignored could result in death or serious injury Indicates a potentially hazardous situation which if ignored may result in damage to the product and other property Shows that the act indicated...

Страница 4: ... injury may result Be sure to handle it under supervision of qualified personnel those who have electrical knowledge This product is not designed or produced for home use or use by general consumers Purposes of use Do not use the product for purposes other than those described in the operation manual Input power Use the product with the specified input power voltage Cover There are parts inside th...

Страница 5: ... the AC power cord or stop applying power before performing maintenance or checking To maintain performance and safe operation of the product it is recommended that peri odic maintenance checking cleaning and calibration be performed Service Internal service is to be done by Kikusui ser vice engineers If the product must be adjusted or repaired contact Kikusui agent distributor Do not disassemble ...

Страница 6: ...category II Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation Examples of such equipment are appliances portable tools and other household and similar loads If such equipment is subjected to special requirements with regard to reliability and availability overvoltage category III applies Overvoltage category III Equipment of overvoltage c...

Страница 7: ...JM6710 Overvoltage category V Switchboard Overvoltage category IV Overvoltage category III Overvoltage category II Overvoltage category I Transformer Equipment Drop wire Indoor wiring AC line Receptacle ...

Страница 8: ...VI Overvoltage category KJM6710 ...

Страница 9: ... 1 2 1 Front Panel 2 1 2 2 Rear Panel 2 2 Chapter 3 Operation 3 1 3 1 Connecting the Signal 3 1 3 2 Function Setup 3 7 3 3 Trigger Edge Selection 3 8 3 4 Symmetry and Slice Level 3 10 3 5 Delay Adjustment 3 13 Chapter 4 RS 232C Control 4 1 4 1 Cable Connection and Initial Setup 4 1 4 2 Messages and Terminators 4 2 4 2 1 Messages 4 2 4 2 2 Terminator 4 2 4 3 Device Messages 4 3 4 4 Sample Program 4...

Страница 10: ...VIII Contents KJM6710 Chapter 6 Specifications 6 1 6 1 Electrical Specifications 6 1 6 2 General Specifications 6 3 6 3 External Dimensions 6 4 ...

Страница 11: ...e jitters of DVDs It can measure the RF to CLOCK jitter by the time interval method The KJM6710 can be used for the development adjustment and inspection of optical pickups It is a compact unit for embedded applications that is designed to maximize the work efficiency on the production line To provide the KJM6710 at low cost the item to be measured has been limited to DVDs and meters and panel swi...

Страница 12: ...P 2 Preface KJM6710 ...

Страница 13: ...n Fig 1 1 gives a list of accessories If any of the accessories are damaged or missing contact your Kikusui agent or distributor Fig 1 1 Accessories We recommend that all packing materials be saved in case the product needs to be transported at a later date Stand 2 pcs E7 000 002 Operation manual 1 pc Z1 003 052 Attachment screws 4 pcs M3 012 021 DC plug 1 pc 91 82 1610 K J M 6 7 1 0 Pa rt N o Z 1...

Страница 14: ...s the precautions to be taken when installing the KJM6710 Make sure to observe them Do not use the KJM6710 in a flammable atmosphere To prevent the possibility of explosion or fire do not use the KJM6710 near alcohol thinner or other combustible materials or in an atmosphere containing such vapors Avoid locations where the KJM6710 is exposed to high temperature or direct sunlight Do not place the ...

Страница 15: ... containing sulfuric acid mist etc This may cause corrosion of various conductors and bad contacts of connectors inside the KJM6710 leading to malfunction and failure or in the worst case a fire Do not place the KJM6710 in a dusty location Accumulation of dust can lead to electric shock or fire Do not place the KJM6710 on an inclined surface or location subject to vibrations The KJM6710 may fall o...

Страница 16: ...e KJM6710 falling during transportation If you need pack ing materials contact your Kikusui agent or distributor 1 4 Connecting the DC Power Supply Using the DC plug provided connect a 15 V DC power supply to the DC INPUT connector on the rear panel Input line voltage range 14 5 VDC to 15 5 VDC Be sure the polarity of the connector is correct If the polarity is reversed the internal fuse will blow...

Страница 17: ...r up Error detection LED This LED illuminates when an error occurs such as when the RF signal is not connected when the signal amplitude is insufficient or when the clock frequency is not correct This LED illuminates for approximately 1 s for self testing at power up If an error is detected during the self test the LED changes to blinking In addition the LED illuminates for a certain period when a...

Страница 18: ...sured value 0 2 V The output impedance is approximately 600 Ω Outputs the jitter sampling waveform before it is converted to rms values The output impedance is approximately 600 Ω DC INPUT connector Used to connect the input power cable Compatible plug EIAJ RC 6705 These switches are used to set the functions of the KJM6710 Connector for external control D SUB 9 pin attachment screws M2 6 9 5 1 5 ...

Страница 19: ...o connect the DUT to the KJM6710 and set the functions according to the input signal 1 Time interval jitter measurement using sliced RF signal and regen erated clock signal measurement method compliant with the DVD Book 1 1 DVD Specifications for Read Only Disc ver 1 0 Aug 1996 2 Do not turn both RF EDGE switches to ON Fig 3 1 Function setup switches EQ OFF PLL OFF SYMMETRY MANUAL CLOCK EDGE Any R...

Страница 20: ...k signal 1 Use RS 232C control 2 Do not turn both RF EDGE switches to ON Fig 3 2 Function setup switches EQ OFF PLL OFF SYMMETRY AUTO or AUTO OFST 1 CLOCK EDGE Any RF EDGE 2 positive either negative DVD player etc KJM6710 Clock signal Equalized RF signal Clock regeneration circuit Slicer Equalizer Pickup ...

Страница 21: ...k signal 1 Use RS 232C control 2 Do not turn both RF EDGE switches to ON Fig 3 3 Function setup switches EQ ON PLL OFF SYMMETRY AUTO or AUTO OFST 1 CLOCK EDGE Any RF EDGE 2 positive either negative DVD player etc KJM6710 Clock signal Pickup output signal Clock regeneration circuit Slicer Equalizer Pickup ...

Страница 22: ...nly sliced RF signal 1 Do not turn both RF EDGE switches to ON Fig 3 4 Function setup switches EQ OFF PLL ON SYMMETRY MANUAL CLOCK EDGE Any RF EDGE 1 positive either negative DVD player etc KJM6710 Sliced RF signal Clock regeneration circuit Slicer Equalizer Pickup ...

Страница 23: ...nal 1 Use RS 232C control 2 Do not turn both RF EDGE switches to ON Fig 3 5 Function setup switches EQ OFF PLL ON SYMMETRY AUTO or AUTO OFST 1 CLOCK EDGE Any RF EDGE 2 positive either negative DVD player etc KJM6710 Equalized RF signal Clock regeneration circuit Slicer Equalizer Pickup ...

Страница 24: ...nal 1 Use RS 232C control 2 Do not turn both RF EDGE switches to ON Fig 3 6 Function setup switches EQ ON PLL ON SYMMETRY AUTO or AUTO OFST 1 CLOCK EDGE Any RF EDGE 2 positive either negative DVD player etc KJM6710 Pickup output signal Clock regeneration circuit Slicer Equalizer Pickup ...

Страница 25: ... indicated in the table is set to AUTO and SYMMETRY LEVEL when set to SYMMETRY MANUAL is set to 0 V The BPS baud rate switch setting takes effect the next time the KJM6710 is powered up Other switch settings take effect immediately All settings except the BPS baud rate setting can be configured using RS 232C command messages The settings that actually take effect are those specified last SW Operat...

Страница 26: ...he rising edge of the clock signal and determines the jitter Measures the time difference from the rising edge of the RF signal to the falling edge of the clock signal and determines the jitter Measures the time difference from the rising edge of the RF signal to the rising edge of the clock signal as well as the time difference from the falling edge of the RF signal to the rising edge of the cloc...

Страница 27: ...ct the edge that is synchronized to the latch time of the RF signal sliced by the DVD player drive etc If the RF signal to be measured is already converted to one edge be sure to set the trigger edge of the RF signal of the KJM6710 to rising or falling to match the signal Measure ment is not possible if both edges are selected Fig 3 8 In the above case set the trigger edge of the RF signal of the ...

Страница 28: ... when the RF signal is binary coded the signal after slicing will have a DC component The RF signal symmetry level refers to the level at which the signal after slicing will not have a DC component when the RF signal is sliced Operation when SYMMETRY mode is set to AUTO The KJM6710 is equipped with a function that automatically controls the slice level to follow the symmetry level of the RF signal...

Страница 29: ...rol may fail especially when the duty cycle of the signal is not 50 Therefore when a sliced signal is input the symmetry level must be made not to follow up the slice level To disable the follow up function of the symmetry level set SYM METRY mode to MANUAL Fig 3 10 Fig 3 10 shows the circuit when SYMMETRY mode is set to MAN UAL When set to MANUAL the feedback control is cut off and the slice leve...

Страница 30: ... 3 12 a DC offset is generated when the input is AC coupled In the example given in Fig 3 12 the duty cycle of the input signal is 25 75 Thus after the signal is AC coupled the signal shifts up by 25 Therefore when slicing the signal at the center of the peak to peak amplitude of the signal you must use the SYM OFFS LEV message to set the slice level approximately to 150 If the duty cycle is not 5...

Страница 31: ...ibuted over the range of 0 to 360 as shown in Fig 3 13 However the distribution crosses 0 and 360 in Fig 3 14 resulting in a large sigma value Proper jitter measurements are not possible in such conditions Therefore adjust ment must be made so that the average phase difference between the two signals is 180 The delay circuit is used to make this adjustment The delay circuit places an appropriate d...

Страница 32: ...ELAY MODE message and set the MANUAL delay through the RS 232C interface 2 Send a DELAY CONTROL message through the RS 232C interface 3 Vary the value of the command so that the DC voltmeter reading is as close to 0 as possible The phase difference is at the optimum value when the voltmeter reading is 0 V ...

Страница 33: ... setting is read during power up Configure the settings on the PC to match the interface specifications below Baud rate 9600 or 19200 bps Data length 8 bits Parity NONE Stop bit 1 bit Flow control Xon Xoff control Send request is ASCII 11H and stop request is ASCII 13 H Fig 4 1 9 pin AT type connector 1 CD carrier detect 2 RXD receive data 3 TXD transmit data 4 DTR data terminal ready 5 GND signal...

Страница 34: ...ge is complete the KJM6710 sends a response message to the computer referred to as an acknowl edge message in response to each program message sent to the KJM6710 Below are the messages sent by the KJM6710 When a command message is sent OK is returned upon successful completion ERROR is returned when an error occurs syntax error for example When a query message is sent A response message for the q...

Страница 35: ...s is the abbreviated form of the device message name Response messages are returned in the abbreviated form Special symbols and characters Special symbols and characters used in this manual to describe pro gram messages and response messages are defined as shown in Table 4 1 Table 4 1 Definitions of special symbols and characters Symbol and Character Description Denotes program data Do not include...

Страница 36: ...he model name of the KJM6710 is returned as shown in the following example Manufacturer KIKUSUI model KJM6710 and version 1 00 Fig 4 2 Response message to IDN RST Resets the device to factory default settings This is equivalent to setting all the function setup switches to OFF Program message Syntax Command message RST Example Reset to factory default settings RST KIKUSUI ELECTRONICS CORP KJM6710 ...

Страница 37: ... input trigger edge polarity to POS CLOC TRIG EDG POS Response message Returns the current setting in response to CLOC TRIG EDG in characters POS or NEG DELAY CONTROL DEL CON Sets the level when the delay is set to MANUAL Or queries the current setting Program message Syntax Command message DELAY CONTROL_ value DEL CON_ value Query message DELAY CONTROL DEL CON Program data Data format Integer Val...

Страница 38: ...e Set the delay mode to AUTO DEL MOD AUT Response message Returns the current setting in response to DEL MOD in charac ters AUT or MAN EQ Turns on off the equalizer circuit Or queries the current setting Program message Syntax Command message EQ_ ON OFF Query message EQ Program data Data format Characters Values ON Equalizer circuit on OFF Equalizer circuit off Example Turn on the equalizer circui...

Страница 39: ...rror is a syntax error Returns 11 IMR Queries the measured value Program message Syntax Query message IMR Response message Returns the measured value 0 or 1 in response to IMR Message Code Error Description 0 NO ERROR 11 Syntax error 12 Out of range error 13 Invalid keyword 15 Invalid instruction 18 Error queue overflow 19 Errors other than the above Message Code Description 0 Above 20 1 Less than...

Страница 40: ...er value being measured in percentages in response to JIT Example When the jitter value is 12 34 Returns 12 34 JITTER TIME JIT TIM Queries the jitter value being measured in ns Range of measured values 0 00 ns to 11 1 ns If measurement is not possible such as when there is no signal input or the clock frequency is outside the specifications 100 0 is returned Program message Syntax Query message JI...

Страница 41: ...urn on the PLL PLL ON Response message Returns the current setting in response to PLL in characters ON or OFF PLL STATUS PLL STAT Queries the PLL circuit status Program message Syntax Query message PLL STATUS PLL STAT Response message Returns the PLL circuit status LOCK or UNLOCK in response to PLL STAT Message Code Description LOCK The PLL circuit is locked to the input signal UNLOCK The PLL circ...

Страница 42: ...s Values POS Rising NEG Falling EIT Rising or falling Example Set the trigger edge polarity to POS RF TRIG EDG POS Response message Returns the current setting in response to RF TRIG EDG in char acters POS NEG or EIT SYMMETRY MODE SYM MOD Sets the symmetry mode Or queries the current setting Program message Syntax Command message SYMMETRY MODE AUTO OFFSET MANUAL SYM MOD_ AUT OFFS MAN Query message...

Страница 43: ...lice level depending on the symmetry mode Program message Syntax Command message SYMMETRY OFFSET LEVEL_ value SYM OFFS LEV_ value Query message SYMMETRY OFFSET LEVEL SYM OFFS LEV Program data Data format Integer Values 128 to 127 Resolution 1 Example Set the symmetry offset or slice level to 32 SYM OFFs LEV 32 Response message Returns the current setting in response to SYM OFFS LEV in integers 128...

Страница 44: ...x Command message TIME CONST 0 01 0 1 1 TIM CON 0 01 0 1 1 Query message TIME CONST TIM CON Program data Data format Real number Values 0 01 0 1 or 1 Example Set the time constant for conversion into rms values to 0 1 TIM CON 0 1 Response message Returns the current setting in response to TIM CON in real num bers 0 01 0 1 or 1 UIS Queries whether measurements cannot be made Program message Syntax ...

Страница 45: ...tion Explicit The Global Resource Manager GRM component object Public m_rm As VisaComLib ResourceManager VISA I O session that is represented as IMessage VISA COM interface Public m_session As VisaComLib IMessage Const MSG You need open the instrument with a valid VISA I O resource Private Sub Form_Initialize Create Resource Manager RM Select the VISA library to be used On Error Resume Next Set m_...

Страница 46: ...trVisaCode VISA Error 0x Hex Err Number MsgBox Err Description vbExclamation strVisaCode End Sub Private Sub Form_Load Model information is checked Maker Model name Version Dim strModelInfo As String Call SendMessage m_session IDN strModelInfo ReceiveMessage m_session If strModelInfo Then Call CloseVisaResource Exit Sub End If Measurement setup Dim strAck As String Call SendMessage m_session PLL O...

Страница 47: ...erNs As String Do Call SendMessage m_session IMR Get the measurement status strImr ReceiveMessage m_session Loop Until strImr 1 Wait until the measured value is less than or equal to 20 Call SendMessage m_session JIT Get the jitter value strJitterPct ReceiveMessage m_session Call SendMessage m_session JIT TIM Get the jitter value ns strJitterNs ReceiveMessage m_session Display the JITTER value Msg...

Страница 48: ...scription vbExclamation strVisaCode End Function Function ReceiveMessage session As IMessage As String Check if the VISA session is correctly opened If session Is Nothing Then MsgBox MSG vbExclamation Exit Function End If Receives the response message from the instrument Dim strRd As String On Error GoTo ERROR_HANDLER strRd session ReadString 256 CR LF Removed strRd Left strRd InStr 1 strRd vbLf 2...

Страница 49: ...olvents such as thinner or ben zine They may discolor the surface or erase the printed characters 5 2 Inspection DC plug Check for ruptures in the covering play or cracks in the plug and so on Breaks in the insulation coating may cause electric shock If a break is found stop using it immediately To purchase accessories contact your Kikusui agent or distributor 5 3 Calibration The KJM6710 is calibr...

Страница 50: ...correct For safety reasons the fuse is designed to blow when the DC voltage polarity is reversed If the fuse is blown request for repairs Cannot make measurements Is the input amplitude adequate The input impedance must be 50 Ω and the input amplitude must be at least 0 2 Vp p 1 MΩ probes cannot be used Is the output impedance correct Check that the output impedance of the connected device and the...

Страница 51: ...dge logic of the RF signal and clock sig nal correct The edge of the RF signal after both edges have been detected cannot be measured on both edges If the edge of other signals is not correct measure ments may not be made correctly Check the edge settings See Rec ommended setup on page 3 9 After power on the ERROR LED blinks at 1 s intervals Is the RF signal discon nected Internal data error has o...

Страница 52: ...5 4 Maintenance KJM6710 ...

Страница 53: ...Signal voltage range 0 2 Vp p to 2 Vp p Input impedance 50 Ω Maximum input voltage 4 V DC AC peak Input connector BNC CLOCK input Input signal Clock frequency 18 MHz to 60 MHz Duty cycle 45 55 to 50 50 Signal voltage range 0 2 Vp p to 2 Vp p Input impedance 50 Ω Maximum input voltage 4 V DC AC peak Input connector BNC Measurement range 0 to 20 or 0 ns to 11 1 ns Spec guaranteed range 4 to 15 of th...

Страница 54: ...hase difference with the RF signal by delaying the CLOCK signal AUTO or MANUAL switchable MANUAL adjustment range 0 to 360 Frequency characteristics 5 16 MHz 3 2 0 3 dB Amplitude ratio with respect to 10 kHz 10 3 MHz 2 8 1 0 dB Amplitude ratio with respect to 10 kHz Group delay characteristics Maximum group delay deviation 6 ns Frequency range 0 7 MHz f 6 7 MHz Synchronizable signal 8 16 modulatio...

Страница 55: ...XOFF control Allowable line voltage range 14 5 V to 15 5 V DC Maximum power consumption 20 W maximum Spec guaranteed temperature and humidity range Temperature 15 C to 35 C Humidity 20 RH to 85 RH no condensation Operating temperature and humidity range Temperature 0 C to 40 C Humidity 20 RH to 85 RH no condensation Storage temperature and humidity range Temperature 20 C to 60 C Temperature 90 RH ...

Страница 56: ...6 4 Specifications KJM6710 6 3 External Dimensions Unit mm 175 MAX15 210 5 MAX240 191 161 29 2 14 5 4 M3 4 M3 24 10 5 21 133 45 ...

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Страница 60: ...TIME INTERVAL JITTER METER KJM6710 OPERATION MANUAL ...

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