Tektronix 80E01, User Manual

Page 1: ...User Manual 80E01 80E02 80E03 80E04 80E06 Electrical Sampling Modules 071 0434 05 This document applies to firmware version 1 00 and above www tektronix com...

Page 2: ...nd pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektr...

Page 3: ...duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintena...

Page 4: ......

Page 5: ...nnel Selection 12 TEKPROBE Connector 13 TDR On Indicator 13 System Interaction 13 Commands From the Main Instrument Front Panel 13 Programmer Interface Commands 14 User Adjustments 14 Cleaning 14 Refe...

Page 6: ...TDR waveform of microstrip in Figure 12 28 Figure 14 TDR step and reflection short 29 Figure 15 TDR step and reflection 50 line terminated in 75 31 Figure 16 TDR step of undamaged sampling module 44...

Page 7: ...ound Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe All Terminal Ratings To avoid fire or shock hazard observe all ratin...

Page 8: ...result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING...

Page 9: ...educe the use of natural resources we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately The symbol shown t...

Page 10: ...Environmental Considerations vi 80E00 Electrical Sampling Modules User Manual...

Page 11: ...locate the document A printed version of this manual is also orderable see Optional Accessories on page 4 Manual Structure This manual is composed of the following chapters H Getting Started shows you...

Page 12: ...Preface viii 80E00 Electrical Sampling Modules User Manual...

Page 13: ...ng modules requires that the appropriate application software is installed on the main instrument In Table 1 each new release of software supports the additional electrical modules as well as all elec...

Page 14: ...mm K female4 Number of TDR channels N A N A N A 2 N A 1 The 80E01 module risetime is estimated using the formula risetime 0 35 bandwidth The 80E06 module risetime is estimated using the formula riseti...

Page 15: ...80E06 are single channel modules with a dedicated strobe drive and generator To main instrument To main instrument Figure 1 Sampling module block diagram TDR on indicator light red 80E04 Signal connec...

Page 16: ...ble Calibration for product at initial shipment Not Orderable 2 4 mm male to 2 92 mm K female adapter 80E01 and 80E06 only 1 015 0703 xx SMA male 50 termination one per channel 015 1022 xx Transit cas...

Page 17: ...CSA8000 TDS8000 Series Service Manual 071 0438 xx DSA8200 Service Manual 071 2049 xx Terminator ECL 015 0558 xx Connector saver 3 5 mm SMA 015 0549 xx 80E00 Electrical Sampling Module User Manual pri...

Page 18: ...le compartment Installing a large module in the right most slot disables the small module compartment that is second from the left Each instrument supports four large compartment channels two per samp...

Page 19: ...ge to the sampling module do not create an ESD antenna by leaving cables attached to the sampling module input with the other end of the cable open To prevent damage to the sampling module or instrume...

Page 20: ...to tighten the sampling module into place See Figure 4 CAUTION To prevent damage to the sampling module or instrument never install or remove a sampling module when the instrument is powered on or wh...

Page 21: ...ed from the Utilities menu when doing the following H Installing an 80E00 sampling module extender between the instrument and an 80E00 sampling module where none was used before H Removing an 80E00 sa...

Page 22: ...Getting Started 10 80E00 Electrical Sampling Modules User Manual...

Page 23: ...ide the Maximum Input Voltage see page 48 for your sampling module To prevent electrostatic damage to the instrument and sampling modules follow the precautions described in this manual and the manual...

Page 24: ...cable has a worn or damaged connector because you may damage the sampling mod ule connector Use extra care when attaching or removing a cable from the connectors Turn only the nut not the cable When a...

Page 25: ...dule is a part of a larger instrument system Most of the sampling module functions such as vertical and horizontal scale are controlled automatically by the main instrument You do not directly control...

Page 26: ...d by the main instrument To save recall or change any module settings use the instrument menus or front panel controls or consult the online help accessed from the main instrument Cleaning The case of...

Page 27: ...nectors Do not allow moisture inside the module Do not use abrasive compounds on any part of the chassis as they may damage it CAUTION To prevent damage avoid the use of chemical cleaning agents that...

Page 28: ...Operating Basics 16 80E00 Electrical Sampling Modules User Manual...

Page 29: ...r and adapter including protection against electrostatic discharge ESD cleaning connectors and the assembly and torquing of connectors H TDR Impedance Measuring describes the stand alone application t...

Page 30: ...nt to main instrument 50 10 mA DUT 10 mA Figure 7 Simplified schematic diagram of step generator positive polarity The following sections and Figures 8 10 describe the operation with a short circuit a...

Page 31: ...r Figure 9 Step generation with a 50 load When the diode switch opens reverse biased apparent resistance to ground at the acquisition point and at the channel connector is 25 because the internal term...

Page 32: ...to 500 mV At the acquisition point the time displayed from the first step to the second step is the round trip propagation time from the acquisition point to the open in the DUT and back See Figure 10...

Page 33: ...nated in ZL 2Zo Er Ei 3 Line terminated in Characteristic Zo ZL Zo Er 0 Short circuit termination ZL 0 Er Ei Line terminated in ZL Zo 2 Er Ei 3 Ei Line terminated in a series R L Ei Line terminated in...

Page 34: ...the main instrument user documentation or online help for scaling and acquisition setup Input 3 Connect the transmission line to the sampling module using proper probing connecting techniques for your...

Page 35: ...f the probe or cable Assuming the line to be tested is an open end microstrip on a circuit board and that your probe or cable is now connected to the line you will see the new open reflection to the r...

Page 36: ...ases You can select from seconds bits or distance The timebase scale and position controls adopt the units you select 13 If your application requires it you can also set either of the following contro...

Page 37: ...check box as indicated at the right to turn gating on and to display the gates on screen 21 Use the G1 Gate1 and G2 spin controls or click and type in values use the keypad or multipurpose knobs or t...

Page 38: ...o compute its slope dv dt 23 Press the SETUP DIALOGS button and select the Cursor tab 24 Select the Waveform cursor type 25 From the pop up list for each of Cursor 1 and Cursor 2 select your TDR sourc...

Page 39: ...idth of a circuit board trace causes a reflection with an amplitude related to the magnitude of the impedance change A Time Domain Reflectometer sends out a step on the cable circuit board or integrat...

Page 40: ...that point this is seen by a TDR TDR also displays changes in capacitance If you think of the TDR display in terms of bumps and dips it tends to make interpretation a lot easier A bump upward deflect...

Page 41: ...related are step amplitude step risetime and step width Step amplitude is the amount of voltage produced by the TDR step It is fixed for the 80E04 at 250 mV In general the higher the amplitude the fa...

Page 42: ...user documentation and online help for more information about distance scale operation All TDR impedance measurements are based on the ratio of transmitted voltage to reflected voltage As a result me...

Page 43: ...e device under test is about 0 4 division high These numbers equate to a reflection coefficient of 0 2 0 4 divisions divided by 2 divisions Plugging the known 50 level and the reflection coefficient i...

Page 44: ...enhance resolution Reference Impedance All TDR measurements are relative they compare an unknown impedance to a known impedance The accuracy of the results depends directly on the accuracy of the ref...

Page 45: ...R features of the 80E04 sampling module Overview To take a common mode or differential TDR measurement Control elements resources Prerequisites 1 Connect your wrist strap to the antistatic connector o...

Page 46: ...er TDR parameters 9 Adjust the Manual Step Deskew adjustment to set the time at which the step generator for the right channel asserts the TDR step relative to the left channel Notice that the second...

Page 47: ...ing Define C1 C2 Math Waveform On and OK Take a measurement 15 Take your measurement For more information see Take automatic measurements on page 25 or Take cursor measurements on page 26 Enable diffe...

Page 48: ...2 You can make forward and reverse Time Domain Transmission TDT measurements using the 80E04 To perform a TDT measurement connect one sampling module channel to the input of the device under test and...

Page 49: ...zero Device under test Adjust TDR step deskew 3 Then from the TDR setup window adjust the TDR Manual Step Deskew so that the propagation delay T0 between the incident edges is equal to the propagatio...

Page 50: ...en if you are uncertain about its conductivity 3 Always wear a grounded wrist strap having a 1 M resistor in series when handling components and devices or when making connections to the test set ESD...

Page 51: ...faces and inspecting the connector Overview To follow proper cleaning procedures Control elements resources Cleaning Precautions 1 Ground the hose nozzle to prevent ESD See Electrostatic Discharge on...

Page 52: ...wap is recommended 3 Clean the connector threads 4 After the alcohol evaporates blow the threads dry using low pressure compressed air or nitrogen Make sure the threads are completely dry before you r...

Page 53: ...hat all center conductors are within the observed pin depth values 5 For multiple connections always put the fixed wrench on the inside stationary half of a connection and apply torque to the outside...

Page 54: ...rotective connector to prevent or reduce damage to a connector Final connection 1 Use a torque wrench to make the final connection See Table 5 on page 42 for torque wrench information 2 Rotate only th...

Page 55: ...c discharge and overvoltages EOS to the input Damage can occur instantaneously Under most conditions when EOS damage occurs the trace will be flat It typically involves short period high current disch...

Page 56: ...recautions are not very effective for EOS damage prevention This is particularly true when the Device Under Test DUT is isolated from any reference voltage levels including the ground level To prevent...

Page 57: ...an 80E04 sampling module and your instrument has TDR capability attach a 50 termination to the channel input and perform a TDR measurement of the attached fitting 1 Select the TDR channel to turn it...

Page 58: ...eference 46 80E00 Electrical Sampling Modules User Manual trig d T 261 7 ns 2 s div 20 26 s div EOS signature 1 995 p 200 mp div 2 005 p Figure 18 Second example of EOS error showing cumulative effect...

Page 59: ...The oscilloscope must have been operating continuously for 20 minutes within the operating temperature range specified H The instrument must be in an environment with temperature altitude humidity and...

Page 60: ...04 2 n Input impedance 50 0 5 Vertical dynamic range 1 Vpp offset 500 mV Vertical operating range1 maximum 1 6 V Vertical nondestruct 2 Sampling module Maximum input range 2 Maximum input 80E01 80E06...

Page 61: ...3 and 80E04 3 or less over the zone 10 ns to 20 ps before step transition 10 5 or less for the first 300 ps following step transition 3 or less over the zone 300 ps to 5 ns following step transition 1...

Page 62: ...nal Ranges in IEEE std 1057 section 2 2 1 4 IEEE std 1057 section 4 8 2 Transition Duration of Step Response The 80E01 rise time is calculated from the 0 35 bandwidth risetime product The 80E06 rise t...

Page 63: ...for the first 400 ps following step transition 3 or less over the zone 400 ps to 5 ns following step transition 1 or less after 5 ns following step transition 1 IEEE std 1057 section 4 8 2 transition...

Page 64: ...25 mm 1 0 in Width 79 mm 3 1 in Depth 135 mm 5 3 in Does not include connectors connector savers connector covers push buttons or lock down hardware protruding from the front or rear panels Constructi...

Page 65: ...ured in cycles per second Digital bandwidth is measured in bits of information per second Channel A place to connect a signal or attach a network or transmission line to sampling modules Common Mode A...

Page 66: ...R step generators Also available at the front panel Internal Clock Output connector Rho When making TDR measurements the ratio of the incident step to the reflected step A value of one 1 indicates com...

Page 67: ...terface 14 Common mode 53 TDR 33 Common mode TDR measurements 18 33 35 Compensation 5 9 when installing moving sampling modules 9 Connector and Adapter Care 38 Connectors 12 Contacting Tektronix vi Cu...

Page 68: ...channel deskew 37 Calibration application 43 Cause of reflections 28 Changing graticule units 23 Common mode 32 35 Common mode measurements 33 database interface 43 differential and common mode measur...