More Signal Detail with the Delayed Timebase | Fluke PM3370B

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GETTING STARTED

3.14MORE SIGNAL DETAIL WITH THE DELAYED TIMEBASE

When you need to study a part of a signal in more detail, a second (delayed) timebase is available. This timebase has its own timebase settings and trigger level adjustment. Additional selections are made in the DELAYED TIMEBASE menu.

DISPLAY

MAGNIFY

	DELAYED TIMEBASE	DELAY	TRIGGER
	DELAYED TIMEBASE		POSITION
			POSITION
	DTB s TIME/DIV ns		TB MODE

1 2 3 4

ST6439

9303

Figure 3.11 Delayed timebase setup

Step 1 Press the STATUS key and TEXT OFF key at the same time for

STANDARD SETUP.

Then shift to trace to the upper half of the screen as indicated.

CH1 50mV

MTB 1.00ms

ch1

ST6690

Image 42

Fluke PM3370B More Signal Detail with the Delayed Timebase, Press the Status key and Text OFF key at the same time for

Contents

Qvwuxphqw Fluke Industrial B.V III Reference ManualReference Manual also contains Main Features Page Following parts should be included in the shipment Or model number VII Contents Getting Started -1 3.1 FRONT-PANEL Layout HOW to USE More Advanced FunctionsScreen Controls Auto Setup More Advanced Trigger Functions Contents Contents XII CH2 XiiiCH1 CH3 XIV MODLine DTB Gate CH1 Y-OUTMain TB Gate Ieee 488.2 BUS Option Safety Precautions Operators SafetyIntroduction Symbols Impaired Safety ProtectionMeasuring Earth Protective earthing Safety InstructionsInstallation Instructions Mains voltage cord, mains voltage range and fuses Rear View Front Cover Installation of batteriesMemory BACK-UP Batteries General information Handle Adjustment and Operating Positions of the Instrument Ieee 488.2/IEC 625 BUS Interface Option RS-232-C Serial Interface Rack MountingVersions FRONT-PANEL Layout Getting Started Switching on the Instrument Screen Controls Screen control area Auto Setup Connect the probe as shown in figure ST5952 Mode Switching Between Analog and Digital Operating Modes Signal Criteria Analog Mode Digital ModeOther Criteria Tude of 2 to 6.4 divi Getting Started Signal Criteria Analog Mode Digital ModeSignal with an ampli Sions Vertical Setup Reconnect the probe to the Probe Adjust signal for display AC Input Coupling Getting Started Timebase Setup Timebase setup Magnify Expand Direct Trigger Setup Direct trigger setup Summary PRE-TRIGGER View More Advanced Features Menu keys and softkeys Cursor Operation Vertical cursors ’’ or the horizontal cursors ’=’ 10 More advanced trigger setup More Advanced Trigger Functions More Signal Detail with the Delayed Timebase Standard SetupPress the Status key and Text OFF key at the same time for MTB1.00ms Ch1 Trace Storage Select Clear & Protect Select Clear ALL Here is how traces are stored in memory Press the Recall key HOW to USE the Instrument PM3394B 200 MHz Full Four Channel Oscilloscope PM3380B 100 MHz 2 Channel Oscilloscope PM3390B 200 MHz 2 Channel OscilloscopePM3384B 100 MHz Full Four-Channel Oscilloscope PM3370B 60 MHz 2 Channel Oscilloscope Front Panel Layout HOW to USE the Instrument Display Adjustment Display and Probe AdjustmentsRecall Standard Setting Simultaneously press the Status and Text OFF keys Display Layout Menus Text OFF Off TPress the Text OFF key three times CAL Signal and Probe Adjustment Repeat this adjustment for the second probe Analog and Digital Modes Autorange attenuator Not available Results in a An amplitude of 2 toDivisions Press the Autoset key for optimum signal display Standard SettingAnalog to Digital Mode Switching Press the Analog key again 12HOW to USE the Instrument Trace Storage RUN/STOPPress 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 coupling Vertical Position Press the AC DC GND key again to obtain ac input coupling Vertical Amplitude 16HOW to USE the InstrumentAdjust Ampl to 100 mV Press the upper key of the Ampl keys Press the Auto Range key Verticalauto RangeVertical Variable Amplitude Press the upper Ampl key once Press 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+CH2 Vertical 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 again Vertical Menu Vertical Probe Range IndicatorRemove the input signal from CH1 Connect the probe again Timebase TIME/DIV Signal is displayed with four periods on the screenHorizontal Deflection and Triggering Set the timebase to 200 μs Display of 2 to 6 waveform periods Timebaseauto RangeTimebase Main TB VAR Press one of the TIME/DIV keys Visible by turning the X POS control 24HOW to USE the InstrumentTimebase Magnify Press the right Magnify key Timebasex POS TriggeringTurn the X POS control clockwise 26HOW to USE the Instrument Trigger SourceTriggerslope Trigger Trigger Level Turn the Trigger Level control Trigger Trigger Position Press the Analog key to select the digital modeSet the delay to 0 with Trigger Position Turn the Trigger Position control counterclockwise Trigger Single Shot Digital Acquisition and Storage Advanced Vertical Functions 32HOW to USE the Instrument Acquire Average Acquire Envelope Acquire Peak Detection Advanced Horizontal and Trigger Functions Trigger ModePress the first softkey to select ’tv’ trigger mode Press the Trigger key Press 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 range Trigger Mode Roll Press the ’STOP on TRIGGER’ softkey to select ’yes’ 38HOW to USE the Instrument Slowly vary the frequency of the sine-wave input signalTrigger Line Press the ’yes’ confirm softkey Memory FunctionsTrace Storageclear & Protect Press the ’yes’ confirm softkey again Trace Storage Clear 40HOW to USE the InstrumentTrace Storage Save Select memory location ’m1’ Press the ’save’ softkey Trace Storage Copy Trace can be copied from one memory location to anotherPress the ’COPY’ softkey Turn the POSition control 42HOW to USE the InstrumentTrace Storage Recall Live trace shifts Press the softkey next to ’yes’ Trace Storage Saving Multiple TracesTrace Storage Recalling Multiple Traces Press the Recall menu key 44HOW to USE the Instrument Cursors FunctionsTime measurements. These can be done in digital Cursors ON/OFF Cursors Time 46HOW to USE the Instrument Cursors VoltCursors Amplitude & Time Cursors Readout Press the softkey next to ’READOUT’ΔV, V1, V2, ΔV-ratio for voltage measurements Cursors Readout ΔT-RATIO/PHASE 48HOW to USE the InstrumentAdjust the cursors to a distance of half a signal period Start with the standard setting.This ensures a correct start Measurement Functions Measure 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-FREQ 52HOW to USE the Instrument Measure Cursor Limit Procedure to set up for TOUCH, Hold and Measure is Measure TOUCH, Hold & Measure Processing Functions Mathematics Filter Press the softkey next to Math 1 to enter the Math 1 submenu 56HOW to USE the Instrument Switch Math 2 off againMathematics Multiply Display Functions Analog Display Defl 50Hz Remove the signal from channel Digital Display Use 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 Magnify Digital Display Interpolation Press the bottom softkey to select ’dots’Press 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 now Delayed Timebase DEL’DTB has two basic functions Delayed TimebaseDelayed Timebase Press the Text OFF button to turn off the menu 64HOW to USE the Instrument Press either key of the Del’dTB TIME/DIV keys Delayed Timebase Trace SEP Delayed Timebase TriggerStart with the Standard Setup Press the softkey to select the TRIG’D mode Press the Trig 1 key in the CH1 section a few times Delayed Timebase Trigger Level Delayed Timebase Coupling First set the instrument to the standard setting Hard Copy FacilitiesSET 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 copy Utility Plot Setup HP7475A, HP7470A, Hpgl = standard HPGL, PM8277 and PM8278 Autoset and Setup Utilities Autoset Standard Autoset User Programmable Setups72HOW to USE the Instrument Position the trace in the bottom of the screen This setup can be saved in memory as follows To recall a previously stored setting 74HOW to USE the Instrument Setup Text LabelSetup Recall a Sequence Autocal Other Features Function Reference Function Reference Acquisition Length Description Memory Expansion Key sequence Toggle key to switch the inverted display of CH2 CH4 on/off ADD Invert SubtractINV ADD Mathematics Mathematical descriptionResult = S1 + S2 Remote commands CPL QW Command to query a waveform Refer to for full details ALT/CHOP Analog Mode Toggle softkey to select ALTernate or CHOPped modeAlternate and chopped modes are shown in the figures below Analog Toggle key to switch between analog mode and digital modeAuto Range Auto Range Autoset CPL AS Command for Auto Setup Refer to for full detailsAutoset Key to start the autoset Autoset Sequence Vert Autoset UserprogUtilityautoset Trig CPL AS Command for an Auto Setup Refer to for full details Autoset Key to switch the Average function on or off Control to select the Average factor Effect of bandwidth limiter CPL CL Command for Calibrate Refer to for full details Calibration AutocalCAL CHANNEL/TRACE Selection Power on OFF Confidence Check Cursors Voltage measurements. When CursorsVolt cursors are used for More than one channel is on, Desired channel for voltage Function Reference Cursors Both Track Cursors Readout Time Measured Function Reference Cursors Readout Volt Event delay DelayFull description is given under Delayed Timebase Trigger position CH1 Slope Delay Measurement Delayed Timebase DEL’D TB Function of ’mtb+dtb’, Delay and Trace SEP Delay Digital Mode Toggle switch to switch between analog mode and digital mode Display Menu Interpolation Lines are drawn between sample points Display Text Display of signal with Amplitude variation AM Variation FM or jitter External Trigger 2 Channels Models only Trig ViewAmpl Filter Glitch Trigger Hold OFF Using Hold OFF to suppress double triggering Control to adjust Main TB hold off timeHold OFF Input Attenuator Manual + Automatic Function of key pair AMPL/VAR Auto Toggle key to switch the Auto Range function on/offInput Coupling Range AC/DC/GND Toggle key to switch a channel on/offInput Impedance 200 MHZ Models only AC/DC Logic Trigger 4 Channels Models only StatePattern Glitch To adjust t2Ift2 Refer to Glitch Trigger function Magnify Horizontal Function of the timebase magnifier and X POS control Function of vertical magnifier and Y POS control Magnify VerticalLeft side decreases the Magnify factor Control to select the vertical magnification Function of key pair TIME/DIV VAR Main Timebase Manual + Automatic46FUNCTION Reference VAR ns Mathematics Measure Menu Following measurements are available VoltPositive and negative, preshoot positive and negative Multiply Mathematics Result = S1 x S2 Peak Detection Toggle key to switch the peak detection on/off POS Power Supply Toggle key to switch the oscilloscope on/offPrinting and Plotting Interface Printer or plotterLayout 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 Status Remote Control RS-232 ParityOdd 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 Rotation Always Parity if 7 Bits Auto SettingScreen Messages Autocal Necessary KEY Inactive When Stopped Auto Setting UserprogramCalibration Error No Average in Roll Mode No Event DELAY, Dual Slope No DTB in Roll ModeNo Envelope in Roll Mode No Event Delay in TV Mode STD Setup = Recall only Setup EmptySetup Protected TIME/DIV Adjusted Setups Track Setups Sequence Standard Setup / Front Panel Reset Softkey to recall ’std’ settingsStd memory selection Status Screen Subtract mode is available in the digital mode of operation Subtract MathematicsResult = S1 S2 Control to select the Subtract process Timebase Modes Text OFF TRIGGER’ 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 location Time Measurements Function Reference Time TOUCH, Hold & Measure Mode Trigger Coupling Ac dc lf-rej Trigger hf-rej Delay Trigger DEL’D TB Toggle 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 Edge TV Trigger Key sequence Usertext Utility Maintenance Util Menu Utility Screen & Sound Volt Measurements Sn = nth sample j=n=k × S n Oversh Overshoot 100%Falling presh = Limit Deflection X-DEFL, X vs Y Toggle softkey to switch X vs Y on Commands CPL Protocol Data Separators AcknowledgeResponses Program data separator Example Program Frame Program frame Commands in Functional Order 4THE CPL Protocol Commands in Alphabetical Order Command Reference Name Command Response Acknowledge ARM Trigger 8THE CPL Protocol Calibrate Default Setup 10THE CPL Protocol GO to Local GO to Remote 12THE CPL Protocol Identification Identity string Example response Local Lockout Xonxoff Program Communication16THE CPL Protocol HWL Approx .5 sec after an acknowledge = 0 is received, Count Node Program Setup18THE CPL Protocol Pds Count Node Program Text PdsChar Char Character Description Examples of user text 22THE CPL Protocol Sample checksum Admin Pds CountProgram Waveform Pds Wavenr Action by Parameter Type Example Oscilloscope Notes Example Example program LSB = Sample and &HFF 26THE CPL Protocol Results is returned cancelling is possible by sending AsciiQuery Measurement Numerical values of an infinite number of measurement T2-trg Value Parameter specified Value,value Or Hz MeasvaluePoint notation, e.g E-09 Example of a single measurement Query Print Null 30THE CPL Protocol Example Written in Quick Basic Query Setup Count Number of strings to follow NodeOscilloscope, e.g =10 hex Complete setup query Example response PM3394 Query Text User text is returned Printed, e.g Admin Count Sample Checksum Query Waveform Wavenr The oscilloscope waveform source Parameter Type Example Input #1,NM$ Interpretation of waveform data SettingsSymbol Parameter Value Type Display Sn = Yz + Yn * Yr * Yu DefinitionsFormula’s Sensitivity Time base Time base = 50 * Xr * Xu/div Reset Instrument Recall Setup Pds Setup reg42THE CPL Protocol Save Setup Represents the setup register number, ranging from 1 Status 44THE CPL Protocol Example status Trigger Acquisition 46THE CPL Protocol Synchronization error Ok, normal situation Syntax errorExecution error Acknowledge Status Example program to investigate status Common horizontal settings SetupCommon vertical settings Main Timebase settings Cursor autosearch settings Hex Dec Meaning Events Trigger Delay settingsCursor settings Measurement 1 settings Measurement 2 settings Nnllxxxxxx.......xx Appendix a Acquire menu structure Acquire Menu Structure Appendix B Cursors menu structure Digital Cursors menu structure Appendix C Display menu structured Display Menu Structure Appendix D Mathematics menu structure Mathematics Menu Structure Measure Menu Structure Appendix F DTB DEL’D TB menu structure SAVE/RECALL Menu Structure Appendix H Setups menu structure Setups Menu Structure Appendix J TB Mode menu structure TB Mode Menu Structure Appendix K Trigger menu structure Div T Trigger menu structure Appendix L Utility menu structure Utility menu structure Vertical Menu Structure Vert Menu Vertical BW LimitOn off 50Ω CH1 50Ω CH2 50Ω CH3 50Ω CH4 CTS RS-232 Cable ConfigurationsRTS DTR Cable to printer/plotter with hardware handshake Cable to controller with hardware handshake Appendix P Channels Simultaneously Sampled AT 100 MS/s Channel Acquisitions Expansion and Interpolation Function Index see Chapter Function Index Function Index Index Display and Probe Adjustment Display Functions Display Menu TOUCH, Hold & Measure ModeDelayed Timebase Trigger DEL’D TB Measure Menu Time Measuremens Volt Measurements Util Maintenance Printing and Plotting Remote Control IeeeInstallation Instructions Appendix N Glitch Trigger GND Input Coupling Memory Functions CHANNEL/TRACE Selection SetupsPrinting and Plotting Remote Control RS-232 Memory BACK-UP Batteries Screen Messages Utility Screen & Sound Autoset and Setup Utilities Setups Setups SequenceTimebase Modes Delayed Timebase Timebase Modes Cursors Readout Measure Menu Volt Measurements 8FUNCTION IndexAdvanced Vertical Functions Display Menu Deflection