Input Coupling, Auto, Range | Fluke PM3370B manual

5 - 40	FUNCTION REFERENCE
AUTO	Toggle key to switch the AUTO RANGE function on/off
RANGE	Toggle key to switch the AUTO RANGE function on/off

AMPL

Toggle key to switch between two vertical input sensitivities of the External Trigger input channel.

INPUT COUPLING

Description:

The characteristics of the oscilloscope’s inputs can be selected for each channel. A channel can be switched on/off with the toggle key ON. Display of the External Trigger input signal is switched on/off with the toggle key TRIG VIEW. CH1 is always switched on when all other channels are switched off.

In the dc coupled mode the complete signal including dc components and extremely low frequencies (<10 Hz) are displayed. In the ac coupled mode, dc components are suppressed. This results in a display of the ac components (≥10 Hz).

Ground coupling (GND) interrupts the input signal. The position of the trace is at the 0 volt level. A continuous ground level indication for each channel can also be activated. Refer to the description of the UTILITY>>SCREEN&SOUND MENU function.

The selections are made with the toggle keys AC/DC/GND for the channel inputs, or AC/DC for the External Trigger input.

The type of coupling is given in the readout area using the symbols (ac), = (dc) and ⊥ (GND).

0dB

−3dB

0dB

AC-COUPLING −3dB

DC-COUPLING

10Hz	FULL BANDWITH			DC	FULL BANDWITH
			FREQ.				FREQ.
			FREQ.				FREQ.

MAT4219

Effect of ac/dc input coupling

Image 160

Fluke PM3370B Input Coupling, Toggle key to switch the Auto Range function on/off, Effect of ac/dc input coupling

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 number VII Contents HOW to USE More Advanced Functions Screen Controls Auto SetupGetting Started -1 3.1 FRONT-PANEL Layout More Advanced Trigger Functions Contents Contents XII Xiii CH1CH2 CH3 MOD XIVLine CH1 Y-OUT Main TB GateDTB Gate Ieee 488.2 BUS Option Operators Safety Safety PrecautionsIntroduction Impaired Safety Protection SymbolsMeasuring Earth Safety Instructions Installation InstructionsProtective earthing Mains voltage cord, mains voltage range and fuses Rear View Installation of batteries Memory BACK-UP BatteriesFront Cover General information Handle Adjustment and Operating Positions of the Instrument Ieee 488.2/IEC 625 BUS Interface Option Rack Mounting RS-232-C Serial InterfaceVersions FRONT-PANEL Layout Getting Started Switching on the Instrument Screen Controls Screen control area Auto Setup Connect the probe as shown in figure ST5952 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 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 Standard 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 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 PM3390B 200 MHz 2 Channel Oscilloscope PM3384B 100 MHz Full Four-Channel OscilloscopePM3380B 100 MHz 2 Channel Oscilloscope PM3370B 60 MHz 2 Channel Oscilloscope Front Panel Layout HOW to USE the Instrument Display and Probe Adjustments Recall Standard SettingDisplay Adjustment Simultaneously press the Status and Text OFF keys Display Layout Off T Menus Text OFFPress the Text OFF key three times CAL Signal and Probe Adjustment Repeat this adjustment for the second probe Analog 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 again Trace 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 coupling Vertical Position Press the AC DC GND key again to obtain ac input coupling 16HOW to USE the Instrument Adjust Ampl to 100 mVVertical Amplitude Press the upper key of the Ampl keys Verticalauto Range Vertical Variable AmplitudePress the Auto Range key Press the upper Ampl key once 18HOW 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+CH2 Vertical 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 again Vertical Probe Range Indicator Remove the input signal from CH1Vertical Menu Connect the probe again Signal is displayed with four periods on the screen Horizontal Deflection and TriggeringTimebase TIME/DIV Set the timebase to 200 μs Timebaseauto Range Timebase Main TB VARDisplay of 2 to 6 waveform periods Press one of the TIME/DIV keys 24HOW to USE the Instrument Timebase MagnifyVisible 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 Trigger Trigger Level Turn the Trigger Level control Press the Analog key to select the digital mode Set the delay to 0 with Trigger PositionTrigger 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 Trigger Mode Press the first softkey to select ’tv’ trigger modeAdvanced Horizontal and Trigger Functions Press the Trigger key Press 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 range Trigger 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 again 40HOW to USE the Instrument Trace Storage SaveTrace 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 42HOW to USE the Instrument Trace Storage RecallTurn the POSition control Live trace shifts Trace Storage Saving Multiple Traces Trace Storage Recalling 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 ON/OFF Cursors Time 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 Start with the standard setting.This ensures a correct start Measurement Functions 50HOW 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-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 Switch Math 2 off again 56HOW to USE the InstrumentMathematics Multiply Display Functions Analog Display Defl 50Hz Remove the signal from channel Digital Display 60HOW 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 Magnify Press 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 now Delayed Timebase Delayed TimebaseDelayed Timebase DEL’DTB has two basic functions 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 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 times Delayed Timebase Trigger Level Delayed Timebase Coupling Hard 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 copy Utility Plot Setup HP7475A, HP7470A, Hpgl = standard HPGL, PM8277 and PM8278 Autoset and Setup Utilities Autoset Standard Setups 72HOW to USE the InstrumentAutoset User Programmable Position the trace in the bottom of the screen This setup can be saved in memory as follows To recall a previously stored setting Setup Text Label Setup Recall a Sequence74HOW to USE the Instrument Autocal Other Features Function Reference Function Reference Acquisition Length Description Memory Expansion Key sequence ADD 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 details ALT/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 Range CPL AS Command for Auto Setup Refer to for full details AutosetAutoset Key to start the autoset Autoset Sequence Autoset Userprog UtilityautosetVert 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 Calibration Autocal CPL CL Command for Calibrate Refer to for full detailsCAL CHANNEL/TRACE Selection Power on OFF Confidence Check Cursors Cursors Volt cursors are used forVoltage measurements. When More than one channel is on, Desired channel for voltage Function Reference Cursors Both Track Cursors Readout Time Measured Function Reference Cursors Readout Volt Delay Full description is given under Delayed TimebaseEvent delay 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 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 Input Attenuator Manual + Automatic Function of key pair AMPL/VAR Toggle key to switch the Auto Range function on/off Input CouplingAuto Range Toggle key to switch a channel on/off Input Impedance 200 MHZ Models onlyAC/DC/GND AC/DC State Logic Trigger 4 Channels Models onlyPattern To adjust t2 Ift2Glitch Refer to Glitch Trigger function Magnify Horizontal Function of the timebase magnifier and X POS control Magnify Vertical Left side decreases the Magnify factorFunction of vertical magnifier and Y POS control Control to select the vertical magnification Main Timebase Manual + Automatic 46FUNCTION ReferenceFunction of key pair TIME/DIV VAR VAR ns Mathematics Measure Menu Volt 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 POS 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 Remote Control Ieee Key to switch from remote to localControl 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 Rise time measurement using the graticule Screen Controls and GraticuleScreen controls and function Trace Rotation Auto Setting Screen MessagesAlways Parity if 7 Bits Autocal Necessary Auto Setting Userprogram Calibration ErrorKEY Inactive When Stopped No Average in Roll Mode No DTB in Roll Mode No Envelope in Roll ModeNo Event DELAY, Dual Slope No Event Delay in TV Mode Setup Empty Setup ProtectedSTD 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 Timebase Modes Text OFF Flows ‘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 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 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 Edge TV 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 Protocol Acknowledge ResponsesData Separators 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 Program Communication 16THE CPL ProtocolXonxoff HWL Approx .5 sec after an acknowledge = 0 is received, Program Setup 18THE CPL ProtocolCount Node Pds Count Node Pds Program TextChar Char Character Description Examples of user text Sample checksum Admin Pds Count Program Waveform22THE CPL Protocol Pds Wavenr Action by Parameter Type Example Oscilloscope Notes Example Example program LSB = Sample and &HFF Results is returned cancelling is possible by sending Ascii Query Measurement26THE CPL Protocol Numerical values of an infinite number of measurement T2-trg Value Parameter specified Value,value Measvalue Point notation, e.g E-09Or Hz Example of a single measurement Query Print Null 30THE CPL Protocol Example Written in Quick Basic Count Number of strings to follow Node Query SetupOscilloscope, 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$ Settings Symbol Parameter Value TypeInterpretation of waveform data Display Definitions Formula’sSn = Yz + Yn * Yr * Yu Sensitivity Time base Time base = 50 * Xr * Xu/div Reset Instrument Pds Setup reg Recall Setup42THE CPL Protocol Save Setup Represents the setup register number, ranging from 1 Status 44THE CPL Protocol Example status Trigger Acquisition 46THE CPL Protocol Ok, normal situation Syntax error Execution errorSynchronization error Acknowledge Status Example program to investigate status Setup Common vertical settingsCommon horizontal settings Main Timebase settings Hex Dec Meaning Events Trigger Delay settings Cursor settingsCursor autosearch 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 Vert Menu Vertical BW Limit Vertical Menu StructureOn off 50Ω CH1 50Ω CH2 50Ω CH3 50Ω CH4 RS-232 Cable Configurations RTSCTS 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 TOUCH, Hold & Measure Mode Delayed Timebase Trigger DEL’D TBDisplay and Probe Adjustment Display Functions Display Menu Measure Menu Time Measuremens Volt Measurements Printing and Plotting Remote Control Ieee Installation Instructions Appendix NUtil Maintenance Glitch Trigger GND Input Coupling CHANNEL/TRACE Selection Setups Printing and Plotting Remote Control RS-232Memory Functions Memory BACK-UP Batteries Autoset and Setup Utilities Setups Setups Sequence Timebase Modes Delayed TimebaseScreen Messages Utility Screen & Sound Timebase Modes 8FUNCTION Index Advanced Vertical FunctionsCursors Readout Measure Menu Volt Measurements Display Menu Deflection