Expansion and Interpolation | Fluke PM3370B guide

APPENDIX P

P - 3

EXPANSION AND INTERPOLATION

Sometimes there is a need to look at a single shot or low repetition rate signal at high timebase speed. This can be done by selecting the ‘real time sampling only’ mode in the Main Time Base menu. In this mode the scope never switches to random sampling.

In order to capture a longer time ‘window’ than would be accessible with the given time base speed, the Main Time Base mode menu allows you to select a longer acquisition length.

By means of horizontal magnification (2x, 4x, 8x, up to 32x) you can expand the signal, giving you a higher effective time base speed. In the DOTS mode, single samples become visible, and SINE and LINEAR interpolation can be used to reconstruct a true-to-life waveform. In four channel single shot mode with its maximum sample rate of 5 MS/s, a timebase speed close to 1 μs/div is no problem. The 8x magnified waveform is then reconstructed out of 62 samples.

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Fluke PM3370B user manual Expansion and Interpolation

Contents

Qvwuxphqw Fluke Industrial B.V Reference Manual IIIReference Manual also contains Main Features Page Or model number Following parts should be included in the shipment VII Contents Screen Controls Auto Setup HOW to USE More Advanced FunctionsGetting Started -1 3.1 FRONT-PANEL Layout More Advanced Trigger Functions Contents Contents XII CH1 XiiiCH2 CH3 MOD XIVLine Main TB Gate CH1 Y-OUTDTB Gate Ieee 488.2 BUS Option Operators Safety Safety PrecautionsIntroduction Impaired Safety Protection SymbolsMeasuring Earth Installation Instructions Safety InstructionsProtective earthing Mains voltage cord, mains voltage range and fuses Rear View Memory BACK-UP Batteries Installation of batteriesFront Cover General information Ieee 488.2/IEC 625 BUS Interface Option Handle Adjustment and Operating Positions of the Instrument Rack Mounting RS-232-C Serial InterfaceVersions Getting Started FRONT-PANEL Layout Switching on the Instrument Screen control area Screen Controls Connect the probe as shown in figure Auto Setup ST5952 Signal Criteria Analog Mode Digital Mode Mode Switching Between Analog and Digital Operating ModesOther Criteria Signal with an ampli Getting Started Signal Criteria Analog Mode Digital ModeTude of 2 to 6.4 divi Sions Reconnect the probe to the Probe Adjust signal for display Vertical Setup AC Input Coupling Getting Started Timebase setup Timebase Setup Magnify Expand Direct trigger setup Direct Trigger Setup Summary PRE-TRIGGER View Menu keys and softkeys More Advanced Features Cursor Operation Vertical cursors ’’ or the horizontal cursors ’=’ More Advanced Trigger Functions 10 More advanced trigger setup Standard Setup More Signal Detail with the Delayed TimebasePress the Status key and Text OFF key at the same time for MTB1.00ms Ch1 Select Clear & Protect Select Clear ALL Trace Storage Press the Recall key Here is how traces are stored in memory PM3394B 200 MHz Full Four Channel Oscilloscope HOW to USE the Instrument PM3384B 100 MHz Full Four-Channel Oscilloscope PM3390B 200 MHz 2 Channel OscilloscopePM3380B 100 MHz 2 Channel Oscilloscope PM3370B 60 MHz 2 Channel Oscilloscope Front Panel Layout HOW to USE the Instrument Recall Standard Setting Display and Probe AdjustmentsDisplay Adjustment Simultaneously press the Status and Text OFF keys Display Layout Off T Menus Text OFFPress the Text OFF key three times Repeat this adjustment for the second probe CAL Signal and Probe Adjustment Analog and Digital Modes An amplitude of 2 to Autorange attenuator Not available Results in aDivisions Analog to Digital Mode Switching Standard SettingPress the Autoset key for optimum signal display Press the Analog key again Trace Storage RUN/STOP 12HOW to USE the InstrumentPress the RUN/STOP key Vertical Deflection Vertical Coupling AC, DC, GND 14HOW to USE the InstrumentPress the AC DC GND key once for DC input coupling Press the AC DC GND key to obtain ground coupling Press the AC DC GND key again to obtain ac input coupling Vertical Position Adjust Ampl to 100 mV 16HOW to USE the InstrumentVertical Amplitude Press the upper key of the Ampl keys Vertical Variable Amplitude Verticalauto RangePress the Auto Range key Press the upper Ampl key once Press the Analog key to switch to the Digital mode 18HOW to USE the InstrumentPress the Analog key to return to the analog mode Vertical CH1+CH2 Vertical Invert Vertical Menu Bandwidth Limiter 20HOW to USE the InstrumentPress the ’BW LIMIT’ softkey to turn it on Press the ’BW LIMIT’ softkey to turn it off again Remove the input signal from CH1 Vertical Probe Range IndicatorVertical Menu Connect the probe again Horizontal Deflection and Triggering Signal is displayed with four periods on the screenTimebase TIME/DIV Set the timebase to 200 μs Timebase Main TB VAR Timebaseauto RangeDisplay of 2 to 6 waveform periods Press one of the TIME/DIV keys Timebase Magnify 24HOW to USE the InstrumentVisible by turning the X POS control Press the right Magnify key Triggering Timebasex POSTurn the X POS control clockwise Trigger Source 26HOW to USE the InstrumentTriggerslope Turn the Trigger Level control Trigger Trigger Level Set the delay to 0 with Trigger Position Press the Analog key to select the digital modeTrigger Trigger Position Turn the Trigger Position control counterclockwise Trigger Single Shot Digital Acquisition and Storage Advanced Vertical Functions Acquire Average 32HOW to USE the Instrument Acquire Peak Detection Acquire Envelope Press the first softkey to select ’tv’ trigger mode Trigger ModeAdvanced Horizontal and Trigger Functions Press the Trigger key Press the ’level-pp’ softkey to turn it off 36HOW to USE the Instrument Trigger Mode TriggeredPress the TB Mode key Move the indicator T- in and out of the signal range Press the ’STOP on TRIGGER’ softkey to select ’yes’ Trigger Mode Roll Slowly vary the frequency of the sine-wave input signal 38HOW to USE the InstrumentTrigger Line Trace Storageclear & Protect Memory FunctionsPress the ’yes’ confirm softkey Press the ’yes’ confirm softkey again Trace Storage Save 40HOW to USE the InstrumentTrace Storage Clear Select memory location ’m1’ Press the ’save’ softkey Trace can be copied from one memory location to another Trace Storage CopyPress the ’COPY’ softkey Trace Storage Recall 42HOW to USE the InstrumentTurn the POSition control Live trace shifts Trace Storage Recalling Multiple Traces Trace Storage Saving Multiple TracesPress the softkey next to ’yes’ Press the Recall menu key Cursors Functions 44HOW to USE the InstrumentTime measurements. These can be done in digital Cursors Time Cursors ON/OFF Cursors Volt 46HOW to USE the InstrumentCursors Amplitude & Time Press the softkey next to ’READOUT’ Cursors ReadoutΔV, V1, V2, ΔV-ratio for voltage measurements 48HOW to USE the Instrument Cursors Readout ΔT-RATIO/PHASEAdjust the cursors to a distance of half a signal period Measurement Functions Start with the standard setting.This ensures a correct start MEASUREMEAS1-PKPK 50HOW to USE the InstrumentMeasure MEAS1-RMS Press the second softkey to turn MEAS1 to ’on’ Remove the Probe Adjust signal from channel Measure DelayPress the first softkey to select ’delay’ Measure Meas 2-FREQ Measure Cursor Limit 52HOW to USE the Instrument Measure TOUCH, Hold & Measure Procedure to set up for TOUCH, Hold and Measure is Processing Functions Press the softkey next to Math 1 to enter the Math 1 submenu Mathematics Filter Switch Math 2 off again 56HOW to USE the InstrumentMathematics Multiply Analog Display Defl Display Functions 50Hz Digital Display Remove the signal from channel Scope ’runs’ once and a signal appears on the screen 60HOW to USE the InstrumentUse the Track control to adjust Vert Magnify to Digital Display Vert Magnify Press the bottom softkey to select ’dots’ Digital Display InterpolationPress the bottom softkey to select ’sine’ Connect the Probe Adjust signal to channels 1 Press Autoset 62HOW to USE the InstrumentDigital Display Windows Screen displays two or four traces now Delayed Timebase Delayed TimebaseDelayed Timebase DEL’DTB has two basic functions Press the Text OFF button to turn off the menu Press either key of the Del’dTB TIME/DIV keys 64HOW to USE the Instrument Delayed Timebase Trigger Delayed Timebase Trace SEPStart with the Standard Setup Press the Trig 1 key in the CH1 section a few times Press the softkey to select the TRIG’D mode Delayed Timebase Coupling Delayed Timebase Trigger Level Hard Copy Facilities First set the instrument to the standard settingSET Standard 9600, 8, N, 3wire, XON/XOFF=ON Utility Print SetupTo set up the layout of the printer hard copy Now you are ready to make the hard copy HP7475A, HP7470A, Hpgl = standard HPGL, PM8277 and PM8278 Utility Plot Setup Autoset Standard Autoset and Setup Utilities 72HOW to USE the Instrument SetupsAutoset User Programmable Position the trace in the bottom of the screen To recall a previously stored setting This setup can be saved in memory as follows Setup Recall a Sequence Setup Text Label74HOW to USE the Instrument Autocal Other Features Function Reference Function Reference Description Acquisition Length Key sequence Memory Expansion ADD Invert Subtract Toggle key to switch the inverted display of CH2 CH4 on/offINV Mathematical description ADD MathematicsResult = S1 + S2 CPL QW Command to query a waveform Refer to for full details Remote commands ALT/CHOP Toggle softkey to select ALTernate or CHOPped mode Analog ModeAlternate and chopped modes are shown in the figures below Auto Range Toggle key to switch between analog mode and digital modeAnalog Auto Range Autoset CPL AS Command for Auto Setup Refer to for full detailsAutoset Key to start the autoset Autoset Sequence Utilityautoset Autoset UserprogVert Trig Autoset CPL AS Command for an Auto Setup Refer to for full details Control to select the Average factor Key to switch the Average function on or off Effect of bandwidth limiter Calibration Autocal CPL CL Command for Calibrate Refer to for full detailsCAL CHANNEL/TRACE Selection Confidence Check Power on OFF Cursors Volt cursors are used for CursorsVoltage measurements. When More than one channel is on, Desired channel for voltage Track Function Reference Cursors Both Measured Cursors Readout Time Function Reference Cursors Readout Volt Full description is given under Delayed Timebase DelayEvent delay Trigger position CH1 Slope Delay Measurement Delayed Timebase DEL’D TB Delay Function of ’mtb+dtb’, Delay and Trace SEP Toggle switch to switch between analog mode and digital mode Digital Mode Interpolation Display Menu Lines are drawn between sample points Display Text Amplitude variation AM Variation FM or jitter Display of signal with Trig View External Trigger 2 Channels Models onlyAmpl Filter Glitch Trigger Hold OFF Control to adjust Main TB hold off time Using Hold OFF to suppress double triggeringHold OFF Function of key pair AMPL/VAR Input Attenuator Manual + Automatic Input Coupling Toggle key to switch the Auto Range function on/offAuto Range Input Impedance 200 MHZ Models only Toggle key to switch a channel on/offAC/DC/GND AC/DC State Logic Trigger 4 Channels Models onlyPattern Ift2 To adjust t2Glitch Refer to Glitch Trigger function Function of the timebase magnifier and X POS control Magnify Horizontal Left side decreases the Magnify factor Magnify VerticalFunction of vertical magnifier and Y POS control Control to select the vertical magnification 46FUNCTION Reference Main Timebase Manual + AutomaticFunction of key pair TIME/DIV VAR VAR ns Measure Menu Mathematics Volt Following measurements are availablePositive and negative, preshoot positive and negative Multiply Mathematics Result = S1 x S2 Peak Detection POS Toggle key to switch the peak detection on/off Toggle key to switch the oscilloscope on/off Power SupplyPrinting and Plotting Printer or plotter InterfaceLayout Real-time clock Toggle softkey to plot trace information Probe Utilities Key to switch from remote to local Remote Control IeeeControl to select the Ieee device address Status Parity Remote Control RS-232Odd Even LL Inhibits front key Status Local Refer to for full details RUN/STOP Screen Controls and Graticule Rise time measurement using the graticuleScreen controls and function Trace Rotation Screen Messages Auto SettingAlways Parity if 7 Bits Autocal Necessary Calibration Error Auto Setting UserprogramKEY Inactive When Stopped No Average in Roll Mode No Envelope in Roll Mode No DTB in Roll ModeNo Event DELAY, Dual Slope No Event Delay in TV Mode Setup Protected Setup EmptySTD Setup = Recall only TIME/DIV Adjusted Setups Track Setups Sequence Softkey to recall ’std’ settings Standard Setup / Front Panel ResetStd memory selection Status Screen Subtract Mathematics Subtract mode is available in the digital mode of operationResult = S1 S2 Control to select the Subtract process Text OFF Timebase Modes Selected, the TB Mode menu provides a ‘STOP on TRIGGER’ Flows ‘through’ the screen from left to right. When Roll isTRIGGER’ is set to ‘on’, the trace stops when the scope is Acquired waveform is stored in a different memory location Time Measurements Function Reference Time TOUCH, Hold & Measure Mode Trigger Coupling Ac dc lf-rej Trigger hf-rej Trigger DEL’D TB Delay Toggle softkey to switch DEL’D TB ’on’ Trigger Level control ranges in level-pp on and off Trigger Main TB Trig Toggle key to select CH1, CH.. or Exttrig as Main TB Function of Trigger Level and slopeSlope to change between positive and negative trigger Edge TV Trigger Key sequence Usertext Utility Maintenance Util Menu Utility Screen & Sound Sn = nth sample j=n=k Volt Measurements × S n 100% Oversh OvershootFalling presh = Limit Deflection X-DEFL, X vs Y Toggle softkey to switch X vs Y on CPL Protocol Commands Responses AcknowledgeData Separators Program data separator Program frame Example Program Frame 4THE CPL Protocol Commands in Functional Order Commands in Alphabetical Order Name Command Reference Acknowledge Command Response 8THE CPL Protocol ARM Trigger Calibrate 10THE CPL Protocol Default Setup GO to Local 12THE CPL Protocol GO to Remote Identity string Identification Example response Local Lockout 16THE CPL Protocol Program CommunicationXonxoff HWL Approx .5 sec after an acknowledge = 0 is received, 18THE CPL Protocol Program SetupCount Node Pds Count Node Pds Program TextChar Char Character Description Examples of user text Program Waveform Sample checksum Admin Pds Count22THE CPL Protocol Pds Wavenr Action by Parameter Type Example Oscilloscope Notes Example LSB = Sample and &HFF Example program Query Measurement Results is returned cancelling is possible by sending Ascii26THE CPL Protocol Numerical values of an infinite number of measurement Value Parameter specified Value,value T2-trg Point notation, e.g E-09 MeasvalueOr Hz Example of a single measurement Null Query Print Example Written in Quick Basic 30THE CPL Protocol Count Number of strings to follow Node Query SetupOscilloscope, e.g =10 hex Example response PM3394 Complete setup query User text is returned Query Text Printed, e.g Query Waveform Admin Count Sample Checksum Parameter Type Example Wavenr The oscilloscope waveform source Input #1,NM$ Symbol Parameter Value Type SettingsInterpretation of waveform data Display Formula’s DefinitionsSn = Yz + Yn * Yr * Yu Sensitivity Time base = 50 * Xr * Xu/div Time base Reset Instrument Pds Setup reg Recall Setup42THE CPL Protocol Represents the setup register number, ranging from 1 Save Setup 44THE CPL Protocol Status Example status 46THE CPL Protocol Trigger Acquisition Execution error Ok, normal situation Syntax errorSynchronization error Acknowledge Status Example program to investigate status Common vertical settings SetupCommon horizontal settings Main Timebase settings Cursor settings Hex Dec Meaning Events Trigger Delay settingsCursor autosearch settings Measurement 1 settings Measurement 2 settings Nnllxxxxxx.......xx Acquire Menu Structure Appendix a Acquire menu structure Digital Appendix B Cursors menu structure Cursors menu structure Display Menu Structure Appendix C Display menu structured Mathematics Menu Structure Appendix D Mathematics menu structure Measure Menu Structure Appendix F DTB DEL’D TB menu structure SAVE/RECALL Menu Structure Setups Menu Structure Appendix H Setups menu structure TB Mode Menu Structure Appendix J TB Mode menu structure Div T Appendix K Trigger menu structure Trigger menu structure Appendix L Utility menu structure Utility menu structure Vert Menu Vertical BW Limit Vertical Menu StructureOn off 50Ω CH1 50Ω CH2 50Ω CH3 50Ω CH4 RTS RS-232 Cable ConfigurationsCTS DTR Cable to controller with hardware handshake Cable to printer/plotter with hardware handshake Channels Simultaneously Sampled AT 100 MS/s Appendix P Channel Acquisitions Expansion and Interpolation Function Index Function Index see Chapter Function Index Index Delayed Timebase Trigger DEL’D TB TOUCH, Hold & Measure ModeDisplay and Probe Adjustment Display Functions Display Menu Measure Menu Time Measuremens Volt Measurements Installation Instructions Appendix N Printing and Plotting Remote Control IeeeUtil Maintenance Glitch Trigger GND Input Coupling Printing and Plotting Remote Control RS-232 CHANNEL/TRACE Selection SetupsMemory Functions Memory BACK-UP Batteries Timebase Modes Delayed Timebase Autoset and Setup Utilities Setups Setups SequenceScreen Messages Utility Screen & Sound Timebase Modes Advanced Vertical Functions 8FUNCTION IndexCursors Readout Measure Menu Volt Measurements Display Menu Deflection