Acquire Average, 32HOW to USE the Instrument | Fluke PM3370B

4 - 32HOW TO USE THE INSTRUMENT

ACQUIRE

AVERAGE

The average function averages the input data over a number of successive acquisitions. The average function is used to reduce the influence of random noise in the input signal. There is no loss of bandwidth when the average function is activated, but the signal must be repetitive. The number of samples over which the average is calculated can be selected by the user.

-Use the probe to connect Ch1 to the Probe Adjust output.

-Press AUTOSET.

-Connect the second probe to channel 2, but do not connect it to a signal!

-Press the CH1+CH2 key to add Ch1 and Ch2 together.

-Press the mV key of the CH2 AMPL keys so that the noise picked up by the probe tip of the second probe appears on the CH1+CH2 trace.

-Press the AVERAGE key.

For maximum ease of use, the scope offers direct access to the important average feature.

The text ’Average = 8’ appears in the bottom of the screen to indicate that the function is active. The default value is 8. The indication changes into ’AVG’. Observe that the noise on the trace is reduced.

-To change the Average constant, press the ACQUIRE key.

-Turn the TRACK control clockwise.

The Average factor increases when the TRACK control is turned clockwise. Observe that this reduces noise on the trace even more.

	TRACK
Average=2	Average=256
AVG	AVG

ST6481

-Turn the TRACK control counterclockwise so that the Average factor is 8 again.

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Fluke PM3370B user manual Acquire Average, 32HOW to USE the Instrument

Contents

Qvwuxphqw Fluke Industrial B.V Reference Manual also contains IIIReference Manual 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 Line XIVMOD Main TB Gate CH1 Y-OUTDTB Gate Ieee 488.2 BUS Option Introduction Safety PrecautionsOperators Safety Measuring Earth SymbolsImpaired Safety Protection 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 Versions RS-232-C Serial InterfaceRack Mounting Getting Started FRONT-PANEL Layout Switching on the Instrument Screen control area Screen Controls Connect the probe as shown in figure Auto Setup ST5952 Other Criteria Mode Switching Between Analog and Digital Operating ModesSignal Criteria Analog Mode Digital Mode 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 Press the Status key and Text OFF key at the same time for More Signal Detail with the Delayed TimebaseStandard Setup 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 Press the Text OFF key three times Menus Text OFFOff T Repeat this adjustment for the second probe CAL Signal and Probe Adjustment Analog and Digital Modes Divisions Autorange attenuator Not available Results in aAn amplitude of 2 to Analog to Digital Mode Switching Standard SettingPress the Autoset key for optimum signal display Press the Analog key again Press the RUN/STOP key 12HOW to USE the InstrumentTrace Storage RUN/STOP 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 Turn the X POS control clockwise Timebasex POSTriggering Triggerslope 26HOW to USE the InstrumentTrigger Source 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 Trigger Line 38HOW to USE the InstrumentSlowly vary the frequency of the sine-wave input signal 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 Press the ’COPY’ softkey Trace Storage CopyTrace can be copied from one memory location to another 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 Time measurements. These can be done in digital 44HOW to USE the InstrumentCursors Functions Cursors Time Cursors ON/OFF Cursors Amplitude & Time 46HOW to USE the InstrumentCursors Volt ΔV, V1, V2, ΔV-ratio for voltage measurements Cursors ReadoutPress the softkey next to ’READOUT’ Adjust the cursors to a distance of half a signal period Cursors Readout ΔT-RATIO/PHASE48HOW to USE the Instrument 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 Mathematics Multiply 56HOW to USE the InstrumentSwitch Math 2 off again 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 ’sine’ Digital Display InterpolationPress the bottom softkey to select ’dots’ 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 Start with the Standard Setup Delayed Timebase Trace SEPDelayed Timebase Trigger 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 SET Standard First set the instrument to the standard settingHard Copy Facilities 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 INV Toggle key to switch the inverted display of CH2 CH4 on/offADD Invert Subtract Result = S1 + S2 ADD MathematicsMathematical description CPL QW Command to query a waveform Refer to for full details Remote commands ALT/CHOP Alternate and chopped modes are shown in the figures below Analog ModeToggle softkey to select ALTernate or CHOPped mode 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 CAL CPL CL Command for Calibrate Refer to for full detailsCalibration Autocal 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 Ampl External Trigger 2 Channels Models onlyTrig View Filter Glitch Trigger Hold OFF Hold OFF Using Hold OFF to suppress double triggeringControl to adjust Main TB hold off time 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 Pattern Logic Trigger 4 Channels Models onlyState 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 Positive and negative, preshoot positive and negative Following measurements are availableVolt Multiply Mathematics Result = S1 x S2 Peak Detection POS Toggle key to switch the peak detection on/off Printing and Plotting Power SupplyToggle key to switch the oscilloscope on/off Layout InterfacePrinter or plotter 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 Odd Even Remote Control RS-232Parity 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 Std memory selection Standard Setup / Front Panel ResetSoftkey to recall ’std’ settings Status Screen Result = S1 S2 Subtract mode is available in the digital mode of operationSubtract Mathematics 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 Falling presh = Oversh Overshoot100% 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 Char Program TextPds 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 Oscilloscope, e.g =10 hex Query SetupCount Number of strings to follow Node 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 42THE CPL Protocol Recall SetupPds Setup reg 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 On off 50Ω CH1 50Ω CH2 50Ω CH3 50Ω CH4 Vertical Menu StructureVert Menu Vertical BW Limit 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