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Fluke PM3370B user manual Cursors Readout Time, Measured

Models: PM3370B

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MAT4210

Δ

-POSITIONΔ CURSOR ON NEGATIVE SLOPE OF PULSE

ch ... :ΔT=25%

5 - 22

FUNCTION REFERENCE

CURSORS READOUT

Description:

The cursors offer a wide variety of voltage and time readouts. For comparison of signal details the ratio mode is very suitable. When in analog mode time or volt cursors have been selected, only the relevant readouts are displayed in the READOUT menu. In digital mode all readouts are displayed at the same time.

The various readout selections for time, volt and ’both’ are reached via the key sequence ’CURSORS >> READOUT’.

CURSORS READOUT

TIME

Three time interval readouts can be selected:

-ΔT: Gives the time between the cursors.

-1/ΔT: This results is a frequency readout. The readout is correct when the distance between the cursors equals one signal period.

-ΔT-ratio: The readout is a percentage

that can be reset by using the	ch ... :ΔV=100%
that can be reset by using the
’ΔT=100 %’ softkey. This mode can be
used for time comparisons. The figure
shows an example of a duty cycle
measurement. First the cursors are
positioned at the period and the readout
is set to 100%. Then the pulse width is			-POSITION CURSORS
measured.	TRACK	Δ	ON 1 SIGNAL PERIOD
			-PRESS ΔT=100%

-Phase (ph): The readout is a number of

degrees that can be reset using the ’ΔT=360 °’ softkey.

-T-trg (time to trigger): The readout gives the time between the trigger point and each time cursors.

Image 142

Fluke PM3370B user manual Cursors Readout Time, Measured

Contents

Qvwuxphqw Fluke Industrial B.V Reference Manual IIIReference Manual also contains Main Features Page Following parts should be included in the shipment Or model numberVII Contents Getting Started -1 3.1 FRONT-PANEL Layout HOW to USE More Advanced FunctionsScreen Controls Auto Setup More Advanced Trigger FunctionsContents Contents XII CH2 XiiiCH1 CH3MOD XIVLine DTB Gate CH1 Y-OUTMain TB Gate Ieee 488.2 BUS OptionOperators Safety Safety PrecautionsIntroduction Impaired Safety Protection SymbolsMeasuring Earth Protective earthing Safety InstructionsInstallation Instructions Mains voltage cord, mains voltage range and fusesRear View Front Cover Installation of batteriesMemory BACK-UP Batteries General informationHandle Adjustment and Operating Positions of the Instrument Ieee 488.2/IEC 625 BUS Interface OptionRack Mounting RS-232-C Serial InterfaceVersions FRONT-PANEL Layout Getting StartedSwitching on the Instrument Screen Controls Screen control areaAuto Setup Connect the probe as shown in figureST5952 Signal Criteria Analog Mode Digital Mode Mode Switching Between Analog and Digital Operating ModesOther Criteria Tude of 2 to 6.4 divi Getting Started Signal Criteria Analog Mode Digital ModeSignal with an ampli SionsVertical Setup Reconnect the probe to the Probe Adjust signal for displayAC Input Coupling Getting Started Timebase Setup Timebase setupMagnify Expand Direct Trigger Setup Direct trigger setupSummary PRE-TRIGGER View More Advanced Features Menu keys and softkeysCursor Operation Vertical cursors ’’ or the horizontal cursors ’=’ 10 More advanced trigger setup More Advanced Trigger FunctionsStandard Setup More Signal Detail with the Delayed TimebasePress the Status key and Text OFF key at the same time for MTB1.00ms Ch1 Trace Storage Select Clear & Protect Select Clear ALLHere is how traces are stored in memory Press the Recall keyHOW to USE the Instrument PM3394B 200 MHz Full Four Channel OscilloscopePM3380B 100 MHz 2 Channel Oscilloscope PM3390B 200 MHz 2 Channel OscilloscopePM3384B 100 MHz Full Four-Channel Oscilloscope PM3370B 60 MHz 2 Channel OscilloscopeFront Panel Layout HOW to USE the Instrument Display Adjustment Display and Probe AdjustmentsRecall Standard Setting Simultaneously press the Status and Text OFF keysDisplay Layout Off T Menus Text OFFPress the Text OFF key three times CAL Signal and Probe Adjustment Repeat this adjustment for the second probeAnalog and Digital Modes An amplitude of 2 to Autorange attenuator Not available Results in aDivisions Press the Autoset key for optimum signal display Standard SettingAnalog to Digital Mode Switching Press the Analog key againTrace Storage RUN/STOP 12HOW to USE the InstrumentPress the RUN/STOP key Vertical Deflection Press the AC DC GND key once for DC input coupling 14HOW to USE the InstrumentVertical Coupling AC, DC, GND Press the AC DC GND key to obtain ground couplingVertical Position Press the AC DC GND key again to obtain ac input couplingVertical Amplitude 16HOW to USE the InstrumentAdjust Ampl to 100 mV Press the upper key of the Ampl keysPress the Auto Range key Verticalauto RangeVertical Variable Amplitude Press the upper Ampl key oncePress the Analog key to return to the analog mode 18HOW to USE the InstrumentPress the Analog key to switch to the Digital mode Vertical CH1+CH2Vertical Invert Press the ’BW LIMIT’ softkey to turn it on 20HOW to USE the InstrumentVertical Menu Bandwidth Limiter Press the ’BW LIMIT’ softkey to turn it off againVertical Menu Vertical Probe Range IndicatorRemove the input signal from CH1 Connect the probe againTimebase TIME/DIV Signal is displayed with four periods on the screenHorizontal Deflection and Triggering Set the timebase to 200 μsDisplay of 2 to 6 waveform periods Timebaseauto RangeTimebase Main TB VAR Press one of the TIME/DIV keysVisible by turning the X POS control 24HOW to USE the InstrumentTimebase Magnify Press the right Magnify keyTriggering Timebasex POSTurn the X POS control clockwise Trigger Source 26HOW to USE the InstrumentTriggerslope Trigger Trigger Level Turn the Trigger Level controlTrigger Trigger Position Press the Analog key to select the digital modeSet the delay to 0 with Trigger Position Turn the Trigger Position control counterclockwiseTrigger Single Shot Digital Acquisition and Storage Advanced Vertical Functions 32HOW to USE the Instrument Acquire AverageAcquire Envelope Acquire Peak DetectionAdvanced Horizontal and Trigger Functions Trigger ModePress the first softkey to select ’tv’ trigger mode Press the Trigger keyPress the ’level-pp’ softkey to turn it off Press the TB Mode key Trigger Mode Triggered36HOW to USE the Instrument Move the indicator T- in and out of the signal rangeTrigger Mode Roll Press the ’STOP on TRIGGER’ softkey to select ’yes’Slowly vary the frequency of the sine-wave input signal 38HOW to USE the InstrumentTrigger Line Press the ’yes’ confirm softkey Memory FunctionsTrace Storageclear & Protect Press the ’yes’ confirm softkey againTrace Storage Clear 40HOW to USE the InstrumentTrace Storage Save Select memory location ’m1’ Press the ’save’ softkeyTrace can be copied from one memory location to another Trace Storage CopyPress the ’COPY’ softkey Turn the POSition control 42HOW to USE the InstrumentTrace Storage Recall Live trace shiftsPress the softkey next to ’yes’ Trace Storage Saving Multiple TracesTrace Storage Recalling Multiple Traces Press the Recall menu keyCursors Functions 44HOW to USE the InstrumentTime measurements. These can be done in digital Cursors ON/OFF Cursors TimeCursors 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 Start with the standard setting.This ensures a correct start Measurement FunctionsMeasure MEAS1-RMS 50HOW to USE the InstrumentMEASUREMEAS1-PKPK Press the second softkey to turn MEAS1 to ’on’Press the first softkey to select ’delay’ Measure DelayRemove the Probe Adjust signal from channel Measure Meas 2-FREQ52HOW to USE the Instrument Measure Cursor LimitProcedure to set up for TOUCH, Hold and Measure is Measure TOUCH, Hold & MeasureProcessing Functions Mathematics Filter Press the softkey next to Math 1 to enter the Math 1 submenuSwitch Math 2 off again 56HOW to USE the InstrumentMathematics Multiply Display Functions Analog Display Defl50Hz Remove the signal from channel Digital DisplayUse the Track control to adjust Vert Magnify to 60HOW to USE the InstrumentScope ’runs’ once and a signal appears on the screen Digital Display Vert MagnifyPress the bottom softkey to select ’dots’ Digital Display InterpolationPress the bottom softkey to select ’sine’ Digital Display Windows 62HOW to USE the InstrumentConnect the Probe Adjust signal to channels 1 Press Autoset Screen displays two or four traces nowDelayed Timebase DEL’DTB has two basic functions Delayed TimebaseDelayed Timebase Press the Text OFF button to turn off the menu64HOW to USE the Instrument Press either key of the Del’dTB TIME/DIV keysDelayed Timebase Trigger Delayed Timebase Trace SEPStart with the Standard Setup Press the softkey to select the TRIG’D mode Press the Trig 1 key in the CH1 section a few timesDelayed Timebase Trigger Level Delayed Timebase CouplingHard Copy Facilities First set the instrument to the standard settingSET Standard To set up the layout of the printer hard copy Utility Print Setup9600, 8, N, 3wire, XON/XOFF=ON Now you are ready to make the hard copyUtility Plot Setup HP7475A, HP7470A, Hpgl = standard HPGL, PM8277 and PM8278Autoset and Setup Utilities Autoset StandardAutoset User Programmable Setups72HOW to USE the Instrument Position the trace in the bottom of the screenThis setup can be saved in memory as follows To recall a previously stored setting74HOW to USE the Instrument Setup Text LabelSetup Recall a Sequence AutocalOther Features Function Reference Function ReferenceAcquisition Length DescriptionMemory Expansion Key sequenceADD Invert Subtract Toggle key to switch the inverted display of CH2 CH4 on/offINV Mathematical description ADD MathematicsResult = S1 + S2 Remote commands CPL QW Command to query a waveform Refer to for full detailsALT/CHOP Toggle softkey to select ALTernate or CHOPped mode Analog ModeAlternate and chopped modes are shown in the figures below Analog Toggle key to switch between analog mode and digital modeAuto Range Auto RangeAutoset CPL AS Command for Auto Setup Refer to for full detailsAutoset Key to start the autosetAutoset Sequence Vert Autoset UserprogUtilityautoset TrigCPL AS Command for an Auto Setup Refer to for full details AutosetKey to switch the Average function on or off Control to select the Average factorEffect of bandwidth limiter Calibration Autocal CPL CL Command for Calibrate Refer to for full detailsCAL CHANNEL/TRACE Selection Power on OFF Confidence CheckCursors Voltage measurements. When CursorsVolt cursors are used for More than one channel is on, Desired channel for voltageFunction Reference Cursors Both TrackCursors Readout Time MeasuredFunction Reference Cursors Readout Volt Event delay DelayFull description is given under Delayed Timebase Trigger positionCH1 Slope Delay Measurement Delayed Timebase DEL’D TB Function of ’mtb+dtb’, Delay and Trace SEP DelayDigital Mode Toggle switch to switch between analog mode and digital modeDisplay Menu InterpolationLines are drawn between sample points Display Text Display of signal with Amplitude variation AM Variation FM or jitterTrig 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 Input Attenuator Manual + Automatic Function of key pair AMPL/VARAuto Toggle key to switch the Auto Range function on/offInput Coupling RangeAC/DC/GND Toggle key to switch a channel on/offInput Impedance 200 MHZ Models only AC/DCState Logic Trigger 4 Channels Models onlyPattern Glitch To adjust t2Ift2 Refer to Glitch Trigger functionMagnify Horizontal Function of the timebase magnifier and X POS controlFunction of vertical magnifier and Y POS control Magnify VerticalLeft side decreases the Magnify factor Control to select the vertical magnificationFunction of key pair TIME/DIV VAR Main Timebase Manual + Automatic46FUNCTION Reference VAR nsMathematics Measure MenuVolt Following measurements are availablePositive and negative, preshoot positive and negative Multiply Mathematics Result = S1 x S2 Peak Detection Toggle key to switch the peak detection on/off POSToggle 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 Control to select the Ieee device address Remote Control IeeeKey to switch from remote to local StatusParity Remote Control RS-232Odd Even LL Inhibits front key Status Local Refer to for full details RUN/STOP Screen controls and function Rise time measurement using the graticuleScreen Controls and Graticule Trace RotationAlways Parity if 7 Bits Auto SettingScreen Messages Autocal NecessaryKEY Inactive When Stopped Auto Setting UserprogramCalibration Error No Average in Roll ModeNo Event DELAY, Dual Slope No DTB in Roll ModeNo Envelope in Roll Mode No Event Delay in TV ModeSTD Setup = Recall only Setup EmptySetup Protected TIME/DIV AdjustedSetups 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 Timebase Modes Text OFFTRIGGER’ is set to ‘on’, the trace stops when the scope is Flows ‘through’ the screen from left to right. When Roll isSelected, the TB Mode menu provides a ‘STOP on TRIGGER’ Acquired waveform is stored in a different memory locationTime Measurements Function Reference Time TOUCH, Hold & Measure Mode Trigger Coupling Ac dc lf-rej Trigger hf-rej Delay Trigger DEL’D TBToggle softkey to switch DEL’D TB ’on’ Trigger Level control ranges in level-pp on and off Trigger Main TB Slope to change between positive and negative trigger Function of Trigger Level and slopeTrig Toggle key to select CH1, CH.. or Exttrig as Main TB EdgeTV Trigger Key sequence Usertext Utility Maintenance Util Menu Utility Screen & Sound Volt Measurements Sn = nth sample j=n=k× S n 100% Oversh OvershootFalling presh = Limit Deflection X-DEFL, X vs Y Toggle softkey to switch X vs Y on Commands CPL ProtocolData Separators AcknowledgeResponses Program data separatorExample Program Frame Program frameCommands in Functional Order 4THE CPL ProtocolCommands in Alphabetical Order Command Reference NameCommand Response AcknowledgeARM Trigger 8THE CPL ProtocolCalibrate Default Setup 10THE CPL ProtocolGO to Local GO to Remote 12THE CPL ProtocolIdentification Identity stringExample response Local Lockout Xonxoff Program Communication16THE CPL Protocol HWLApprox .5 sec after an acknowledge = 0 is received, Count Node Program Setup18THE CPL Protocol Pds Count NodePds Program TextChar Char Character Description Examples of user text 22THE CPL Protocol Sample checksum Admin Pds CountProgram Waveform Pds WavenrAction by Parameter Type Example Oscilloscope Notes Example Example program LSB = Sample and &HFF26THE CPL Protocol Results is returned cancelling is possible by sending AsciiQuery Measurement Numerical values of an infinite number of measurementT2-trg Value Parameter specified Value,valueOr Hz MeasvaluePoint notation, e.g E-09 Example of a single measurementQuery Print Null30THE CPL Protocol Example Written in Quick BasicCount Number of strings to follow Node Query SetupOscilloscope, e.g =10 hex Complete setup query Example response PM3394Query Text User text is returnedPrinted, e.g Admin Count Sample Checksum Query WaveformWavenr The oscilloscope waveform source Parameter Type ExampleInput #1,NM$ Interpretation of waveform data SettingsSymbol Parameter Value Type DisplaySn = Yz + Yn * Yr * Yu DefinitionsFormula’s SensitivityTime base Time base = 50 * Xr * Xu/divReset Instrument Pds Setup reg Recall Setup42THE CPL Protocol Save Setup Represents the setup register number, ranging from 1Status 44THE CPL ProtocolExample status Trigger Acquisition 46THE CPL ProtocolSynchronization error Ok, normal situation Syntax errorExecution error AcknowledgeStatus Example program to investigate status Common horizontal settings SetupCommon vertical settings Main Timebase settingsCursor autosearch settings Hex Dec Meaning Events Trigger Delay settingsCursor settings Measurement 1 settings Measurement 2 settingsNnllxxxxxx.......xx Appendix a Acquire menu structure Acquire Menu StructureAppendix B Cursors menu structure DigitalCursors menu structure Appendix C Display menu structured Display Menu StructureAppendix D Mathematics menu structure Mathematics Menu StructureMeasure Menu Structure Appendix F DTB DEL’D TB menu structure SAVE/RECALL Menu Structure Appendix H Setups menu structure Setups Menu StructureAppendix J TB Mode menu structure TB Mode Menu StructureAppendix K Trigger menu structure Div TTrigger 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 CTS RS-232 Cable ConfigurationsRTS DTRCable to printer/plotter with hardware handshake Cable to controller with hardware handshakeAppendix P Channels Simultaneously Sampled AT 100 MS/sChannel Acquisitions Expansion and Interpolation Function Index see Chapter Function IndexFunction Index Index Display and Probe Adjustment Display Functions Display Menu TOUCH, Hold & Measure ModeDelayed Timebase Trigger DEL’D TB Measure Menu Time Measuremens Volt MeasurementsUtil Maintenance Printing and Plotting Remote Control IeeeInstallation Instructions Appendix N Glitch Trigger GND Input CouplingMemory Functions CHANNEL/TRACE Selection SetupsPrinting and Plotting Remote Control RS-232 Memory BACK-UP BatteriesScreen Messages Utility Screen & Sound Autoset and Setup Utilities Setups Setups SequenceTimebase Modes Delayed Timebase Timebase ModesCursors Readout Measure Menu Volt Measurements 8FUNCTION IndexAdvanced Vertical Functions Display Menu Deflection