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Fluke PM3370B Mode Switching Between Analog and Digital Operating Modes, Other Criteria

Models: PM3370B

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GETTING STARTED

3.5MODE SWITCHING BETWEEN ANALOG AND DIGITAL OPERATING MODES

You can use the yellow ANALOG key to switch from the analog mode to the digital mode and back at any time. The signal acquisition and display functions of both operating modes are very similar. However, the nature of the signals you are using may determine which operating mode you prefer to use. For more information, refer to the following table:

SIGNAL CRITERIA	ANALOG MODE	DIGITAL MODE
Repetitive signals of	Usable	Usable
30 Hz and higher
Repetitive signals	Causes display	Preferred
below 30 Hz	flickering
Single events	Displayed for the	Can capture and
	duration of	display for long
	the event	term display
Repetitive signals that are	Preferred	May cause alaising
amplitude modulated		Use Peak detect or
		Envelope mode
Repetitive signals that	Preferred	May cause aliasing.
are modulated in frequency		Use Envelope mode.
Long serial data streams	Preferred when	When using delayed
	Delayed sweep	sweep to observe
	is not used.	details, Digital mode
		provides better
		light output.
Video signals	Preferred when	When using delayed
	Delayed sweep	sweep to observe
	is not used.	details, Digital mode
		provides better
		light output.
OTHER CRITERIA
Need to see pretrigger	Not possible	Up to full acquisition
information		length

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Fluke PM3370B Mode Switching Between Analog and Digital Operating Modes, Signal Criteria Analog Mode Digital Mode

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 HOW to USE More Advanced Functions Screen Controls Auto SetupGetting Started -1 3.1 FRONT-PANEL Layout More Advanced Trigger FunctionsContents Contents XII Xiii CH1CH2 CH3MOD XIVLine CH1 Y-OUT Main TB GateDTB Gate Ieee 488.2 BUS OptionOperators Safety Safety PrecautionsIntroduction Impaired Safety Protection SymbolsMeasuring Earth Safety Instructions Installation InstructionsProtective earthing Mains voltage cord, mains voltage range and fusesRear View Installation of batteries Memory BACK-UP BatteriesFront Cover 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 Getting Started Signal Criteria Analog Mode Digital Mode Signal with an ampliTude of 2 to 6.4 divi 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 OscilloscopePM3390B 200 MHz 2 Channel Oscilloscope PM3384B 100 MHz Full Four-Channel OscilloscopePM3380B 100 MHz 2 Channel Oscilloscope PM3370B 60 MHz 2 Channel OscilloscopeFront Panel Layout HOW to USE the Instrument Display and Probe Adjustments Recall Standard SettingDisplay Adjustment 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 Standard Setting Analog to Digital Mode SwitchingPress the Autoset key for optimum signal display Press the Analog key againTrace Storage RUN/STOP 12HOW to USE the InstrumentPress the RUN/STOP key Vertical Deflection 14HOW to USE the Instrument Vertical Coupling AC, DC, GNDPress the AC DC GND key once for DC input coupling Press the AC DC GND key to obtain ground couplingVertical Position Press the AC DC GND key again to obtain ac input coupling16HOW to USE the Instrument Adjust Ampl to 100 mVVertical Amplitude Press the upper key of the Ampl keysVerticalauto Range Vertical Variable AmplitudePress the Auto Range key Press the upper Ampl key once18HOW to USE the Instrument Press the Analog key to switch to the Digital modePress the Analog key to return to the analog mode Vertical CH1+CH2Vertical Invert 20HOW to USE the Instrument Vertical Menu Bandwidth LimiterPress the ’BW LIMIT’ softkey to turn it on Press the ’BW LIMIT’ softkey to turn it off againVertical Probe Range Indicator Remove the input signal from CH1Vertical Menu Connect the probe againSignal is displayed with four periods on the screen Horizontal Deflection and TriggeringTimebase TIME/DIV Set the timebase to 200 μsTimebaseauto Range Timebase Main TB VARDisplay of 2 to 6 waveform periods Press one of the TIME/DIV keys24HOW to USE the Instrument Timebase MagnifyVisible by turning the X POS control 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 controlPress the Analog key to select the digital mode Set the delay to 0 with Trigger PositionTrigger 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 DetectionTrigger Mode Press the first softkey to select ’tv’ trigger modeAdvanced Horizontal and Trigger Functions Press the Trigger keyPress the ’level-pp’ softkey to turn it off Trigger Mode Triggered 36HOW to USE the InstrumentPress the TB Mode key 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 Memory Functions Trace Storageclear & ProtectPress the ’yes’ confirm softkey Press the ’yes’ confirm softkey again40HOW to USE the Instrument Trace Storage SaveTrace Storage Clear Select memory location ’m1’ Press the ’save’ softkeyTrace can be copied from one memory location to another Trace Storage CopyPress the ’COPY’ softkey 42HOW to USE the Instrument Trace Storage RecallTurn the POSition control Live trace shiftsTrace Storage Saving Multiple Traces Trace Storage Recalling Multiple TracesPress the softkey next to ’yes’ 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 Functions50HOW to USE the Instrument MEASUREMEAS1-PKPKMeasure MEAS1-RMS Press the second softkey to turn MEAS1 to ’on’Measure Delay Remove the Probe Adjust signal from channelPress the first softkey to select ’delay’ 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 Display60HOW to USE the Instrument Scope ’runs’ once and a signal appears on the screenUse the Track control to adjust Vert Magnify to Digital Display Vert MagnifyPress the bottom softkey to select ’dots’ Digital Display InterpolationPress the bottom softkey to select ’sine’ 62HOW to USE the Instrument Connect the Probe Adjust signal to channels 1 Press AutosetDigital Display Windows Screen displays two or four traces nowDelayed Timebase Delayed TimebaseDelayed Timebase DEL’DTB has two basic functions 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 Utility Print Setup 9600, 8, N, 3wire, XON/XOFF=ONTo set up the layout of the printer hard copy Now you are ready to make the hard copyUtility Plot Setup HP7475A, HP7470A, Hpgl = standard HPGL, PM8277 and PM8278Autoset and Setup Utilities Autoset StandardSetups 72HOW to USE the InstrumentAutoset User Programmable Position the trace in the bottom of the screenThis setup can be saved in memory as follows To recall a previously stored settingSetup Text Label Setup Recall a Sequence74HOW to USE the Instrument 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 Toggle key to switch between analog mode and digital mode Auto RangeAnalog Auto RangeCPL AS Command for Auto Setup Refer to for full details AutosetAutoset Key to start the autosetAutoset Sequence Autoset Userprog UtilityautosetVert 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 Cursors Volt cursors are used forVoltage measurements. When More than one channel is on, Desired channel for voltageFunction Reference Cursors Both TrackCursors Readout Time MeasuredFunction Reference Cursors Readout Volt Delay Full description is given under Delayed TimebaseEvent delay 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/VARToggle key to switch the Auto Range function on/off Input CouplingAuto RangeToggle key to switch a channel on/off Input Impedance 200 MHZ Models onlyAC/DC/GND AC/DCState Logic Trigger 4 Channels Models onlyPattern To adjust t2 Ift2Glitch Refer to Glitch Trigger functionMagnify Horizontal Function of the timebase magnifier and X POS controlMagnify Vertical Left side decreases the Magnify factorFunction of vertical magnifier and Y POS control Control to select the vertical magnificationMain Timebase Manual + Automatic 46FUNCTION ReferenceFunction of key pair TIME/DIV VAR 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 Remote Control Ieee Key to switch from remote to localControl to select the Ieee device address StatusParity Remote Control RS-232Odd Even LL Inhibits front key Status Local Refer to for full details RUN/STOP Rise time measurement using the graticule Screen Controls and GraticuleScreen controls and function Trace RotationAuto Setting Screen MessagesAlways Parity if 7 Bits Autocal NecessaryAuto Setting Userprogram Calibration ErrorKEY Inactive When Stopped No Average in Roll ModeNo DTB in Roll Mode No Envelope in Roll ModeNo Event DELAY, Dual Slope No Event Delay in TV ModeSetup Empty Setup ProtectedSTD Setup = Recall only 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 OFFFlows ‘through’ the screen from left to right. When Roll is Selected, the TB Mode menu provides a ‘STOP on TRIGGER’TRIGGER’ is set to ‘on’, the trace stops when the scope is 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 Function of Trigger Level and slope Trig Toggle key to select CH1, CH.. or Exttrig as Main TBSlope to change between positive and negative trigger 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 ProtocolAcknowledge ResponsesData Separators 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 Program Communication 16THE CPL ProtocolXonxoff HWLApprox .5 sec after an acknowledge = 0 is received, Program Setup 18THE CPL ProtocolCount Node Pds Count NodePds Program TextChar Char Character Description Examples of user text Sample checksum Admin Pds Count Program Waveform22THE CPL Protocol Pds WavenrAction by Parameter Type Example Oscilloscope Notes Example Example program LSB = Sample and &HFFResults is returned cancelling is possible by sending Ascii Query Measurement26THE CPL Protocol Numerical values of an infinite number of measurementT2-trg Value Parameter specified Value,valueMeasvalue Point notation, e.g E-09Or Hz 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$ Settings Symbol Parameter Value TypeInterpretation of waveform data DisplayDefinitions Formula’sSn = Yz + Yn * Yr * Yu 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 ProtocolOk, normal situation Syntax error Execution errorSynchronization error AcknowledgeStatus Example program to investigate status Setup Common vertical settingsCommon horizontal settings Main Timebase settingsHex Dec Meaning Events Trigger Delay settings Cursor settingsCursor autosearch 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 RS-232 Cable Configurations RTSCTS 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 TOUCH, Hold & Measure Mode Delayed Timebase Trigger DEL’D TBDisplay and Probe Adjustment Display Functions Display Menu Measure Menu Time Measuremens Volt MeasurementsPrinting and Plotting Remote Control Ieee Installation Instructions Appendix NUtil Maintenance Glitch Trigger GND Input CouplingCHANNEL/TRACE Selection Setups Printing and Plotting Remote Control RS-232Memory Functions Memory BACK-UP BatteriesAutoset and Setup Utilities Setups Setups Sequence Timebase Modes Delayed TimebaseScreen Messages Utility Screen & Sound Timebase Modes8FUNCTION Index Advanced Vertical FunctionsCursors Readout Measure Menu Volt Measurements Display Menu Deflection