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Horizontal Operation

222PS Operator Manual

3Ć27

Actual

HighĆFrequency

Waveform

Apparent LowĆFrequency

Waveform Due to Aliasing

Sampled Points

Figure 3Ć11:ăAn Aliased Waveform

To avoid aliasing, make sure that your sample rate is fast enough for

the frequency of the signal you wish to view Ċ usually, at least twice

as fast as the highest frequency component of the signal.

TimeĆBase Mode

When you choose a seconds per division setting, the instrument

automatically selects the timeĆbase mode required to display the

resulting signal. The timeĆbase mode can also depend on the trigger

and acquisition modes. The 222PS uses four timeĆbase modes:

record, equivalentĆtime, scroll, and scrollĆscan.

Record

 Ċ For most seconds per division settings, the instrument

uses the timeĆbase mode you are most accustomed to:

record

. When

a trigger occurs, the 222PS acquires and displays a full screen of the

waveform in one pass.

EquivalentĆtime

 Ċ However, when the seconds per division setting

is too fast, the instrument cannot sample fast enough to capture all 512

samples and display them in one pass. Therefore, the instrument

depends on successive repetitions of the same waveform to fill the

display with samples.

Scroll and ScrollĆscan

 Ċ When the seconds per division setting is

very slow, the display takes too long to fill using record timeĆbase

mode. Therefore, the instrument uses one of scrolling timeĆbase

modes.

Horizontal Operation

222PS Operator Manual

3Ć27

Actual

HighĆFrequency

Waveform

Apparent LowĆFrequency

Waveform Due to Aliasing

Sampled Points

Figure 3Ć11:ăAn Aliased Waveform

To avoid aliasing, make sure that your sample rate is fast enough for

the frequency of the signal you wish to view Ċ usually, at least twice

as fast as the highest frequency component of the signal.

TimeĆBase Mode

When you choose a seconds per division setting, the instrument

automatically selects the timeĆbase mode required to display the

resulting signal. The timeĆbase mode can also depend on the trigger

and acquisition modes. The 222PS uses four timeĆbase modes:

record, equivalentĆtime, scroll, and scrollĆscan.

Record

 Ċ For most seconds per division settings, the instrument

uses the timeĆbase mode you are most accustomed to:

record

. When

a trigger occurs, the 222PS acquires and displays a full screen of the

waveform in one pass.

EquivalentĆtime

 Ċ However, when the seconds per division setting

is too fast, the instrument cannot sample fast enough to capture all 512

samples and display them in one pass. Therefore, the instrument

depends on successive repetitions of the same waveform to fill the

display with samples.

Scroll and ScrollĆscan

 Ċ When the seconds per division setting is

very slow, the display takes too long to fill using record timeĆbase

mode. Therefore, the instrument uses one of scrolling timeĆbase

modes.

Содержание 222PS

Страница 1: ...e information at the rear of this manual Second Edition December 1993 Last Revised September 29 1994 222PS PowerScout Power Systems Oscilloscope Operator Manual 070 8097 02 Please check for change information at the rear of this manual Second Edition December 1993 Last Revised September 29 1994 ...

Страница 2: ...s issued and pending The following are registered trademarks TEKTRONIX TEK TEKPROBE and SCOPEĆMOBILE Instrument Serial Numbers Each instrument manufactured by Tektronix has a serial number on a panel insert or tag or stamped on the chassis The first letter in the serial number designates the country of manufacture The last five digits of the serial number are assigned sequentially and are unique t...

Страница 3: ...RRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without char...

Страница 4: ...OPTIONS 222PS PowerScout POWER POWER SYSTEMS OSCILLOSCOPE AND ALL INSTALLED OPTIONS 222PS PowerScout Certificate of the Manufacturer Importer We hereby certify that the complies with the RF Interference Suppression requirements of Amtsbl ĆVfg 1046 1984 The German Postal Service was notified that the equipment is being marketed The German Postal Service has the right to reĆtest the series and to ve...

Страница 5: ... betrieben werden wenn die Voraussetzungen des Par 2 Ziff 1 7 1 der Vfg 1046 1984 eingehalten werden NOTICE to the user operator The German Postal Service requires that Systems assembled by the operator user of this instrument must also comply with Postal Regulation Vfg 1046 1984 Par 2 Sect 1 HINWEIS für den Benutzer Betreiber Die vom Betreiber zusammengestellte Anlage innerhalb derer dies Gerät e...

Страница 6: ......

Страница 7: ... Measuring Signals provides stepĆbyĆstep instructions to get you started making measurements quickly 222PS Operator Manual i Welcome This manual contains the following sections H Overview describes the 222PS PowerScout and provides safety information H At A Glance describes the controls and connectors for the 222PS H In Detail provides further detail on some aspects of the 222PS building on the in...

Страница 8: ...have never used an oscilloscope before please read the tutorial in Appendix A before using the 222PS Welcome ii H Remote Communication provides information on RSĆ232 commuĆ nication procedures between the 222PS and a PC H Performance Verification describes the procedures necessary to verify that the 222PS is performing according to specifications H Specifications provides complete specifications f...

Страница 9: ...on Modes 3Ć1 Kinds of Acquisition Modes 3Ć1 Normal Acquisition Mode 3Ć1 Average Acquisition Mode 3Ć1 222PS Operator Manual iii Contents List of Illustrations ix List of Tables xiii Overview About the 222PS PowerScout 1Ć1 Safety 1Ć2 Symbols and Terms 1Ć2 Specific Precautions 1Ć3 At a Glance Front Panel Controls 2Ć2 Vertical Controls 2Ć3 Trigger Controls 2Ć4 Horizontal Controls 2Ć5 The Display 2Ć6 R...

Страница 10: ...hipment 3Ć33 Power 3Ć35 Battery Operation 3Ć35 Connecting the Battery 3Ć35 Charging the Battery 3Ć37 Contents iv Envelope Acquisition Mode 3Ć2 Continuous Envelope Acquisition Mode 3Ć2 Selecting an Acquisition Mode 3Ć3 Auto Setup 3Ć5 Procedure 3Ć5 Parameter Effects 3Ć5 Channels 3Ć5 Vertical Scaling 3Ć6 Horizontal Scaling 3Ć6 Low and High Frequencies 3Ć6 Calibration 3Ć9 Running the SelfĆCalibration ...

Страница 11: ...oĆLevel 3Ć70 Trigger Position 3Ć70 Trigger Modes 3Ć71 Normal 3Ć72 AutoĆBaseline 3Ć72 AutoĆLevel 3Ć72 222PS Operator Manual v Charging the Battery Externally 3Ć37 Time Out 3Ć37 Replacing the Battery 3Ć39 Storing the Instrument 3Ć40 Deep Discharge 3Ć40 External Power Operation 3Ć41 AC Line Operation 3Ć41 Other Sources of External Power 3Ć42 Probes 3Ć43 Connecting the Probes 3Ć44 Configuring the Prob...

Страница 12: ...ptions AĆ30 Transfer to a Local PC AĆ30 Transfer via Modem AĆ30 RSĆ232 Interface Specifications AĆ32 Contents vi SingleĆSequence 3Ć73 Setting the Trigger Mode 3Ć73 Vertical Operation 3Ć75 Vertical Positioning 3Ć75 Volts per Division 3Ć76 Variable Volts per Division 3Ć76 XY Mode 3Ć79 Entering and Exiting XY Mode 3Ć79 Positioning XY Waveforms 3Ć80 Appendices Appendix A Tutorial AĆ1 The Screen AĆ1 Me...

Страница 13: ...sories AĆ79 Optional Accessories AĆ80 Instrument Options AĆ81 External Power AC Adapter Options AĆ81 222PS Operator Manual vii RSĆ232 Communication Parameters AĆ32 Baud Rates AĆ32 Levels AĆ33 Maximum Applied Voltage AĆ33 Plotter Printer Support AĆ33 Messages AĆ33 Optional Accessories AĆ33 CAT200 AĆ33 RSĆ232 Interconnection Cables AĆ34 Appendix C Quick Checks AĆ37 General Instructions AĆ37 Conventi...

Страница 14: ...Contents viii Glossary Index Glossary GĆ1 Index IĆ1 Contents viii Glossary Index Glossary GĆ1 Index IĆ1 ...

Страница 15: ...Side View Showing Probe Connectors Pouch Removed 3Ć44 Figure 3Ć19 ăThe Auxiliary Functions Menu 3Ć45 222PS Operator Manual ix List of Illustrations Figure 2Ć1 ă222PS Front Panel 2Ć2 Figure 2Ć2 ăVertical Controls 2Ć3 Figure 2Ć3 ăTrigger Controls 2Ć4 Figure 2Ć4 ăHorizontal Controls 2Ć5 Figure 2Ć5 ăVertical Readouts 2Ć7 Figure 2Ć6 ăSaved Waveform Readouts 2Ć8 Figure 2Ć7 ăTrigger and Horizontal Readou...

Страница 16: ...ure AĆ15 ăSetup for Probe Compensation Check AĆ55 Figure AĆ16 ăSetup for Analog Bandwidth Check AĆ56 Contents x Figure 3Ć20 ăThe Configuration Menu 3Ć46 Figure 3Ć21 ăThe Probe Menu 3Ć46 Figure 3Ć22 ăProbe and Accessories 3Ć48 Figure 3Ć23 ăSaved Waveforms Menu 3Ć52 Figure 3Ć24 ăSaved Waveform Parameters 3Ć53 Figure 3Ć25 ăThe Recall Waveforms Menu 3Ć54 Figure 3Ć26 ăThe Setup Menu 3Ć56 Figure 3Ć27 ăT...

Страница 17: ...cy Derating Curve AĆ67 Figure AĆ21 ăMaximum CommonĆMode Voltage Versus Frequency Derating Curve AĆ68 222PS Operator Manual xi Figure AĆ17 ăSetup for Horizontal Test AĆ58 Figure AĆ18 ăSetup for Trigger Checks AĆ61 Figure AĆ19 ăSetup for External Trigger Sensitivity Check AĆ63 Figure AĆ20 ăMaximum NormalĆMode Voltage Versus Frequency Derating Curve AĆ67 Figure AĆ21 ăMaximum CommonĆMode Voltage Versu...

Страница 18: ...Contents xii Contents xii ...

Страница 19: ...isticsĊPower System AĆ77 TableĂAĆ25 ăStandard Accessories AĆ79 TableĂAĆ26 ăOptional Accessories AĆ80 222PS Operator Manual xiii List of Tables TableĂ3Ć1 ă Auto Setup Settings 3Ć7 TableĂ3Ć2 ă TimeĆBase Modes 3Ć28 TableĂ3Ć3 ă AutoĆLevel Trigger Interval Time Limits 3Ć73 TableĂAĆ1 ăBUT Button Codes AĆ15 TableĂAĆ2 ăDAC Code and Value Data AĆ17 TableĂAĆ3 ăChannel Settings AĆ21 TableĂAĆ4 ăSecondsĆperĆDi...

Страница 20: ...Contents xiv TableĂAĆ27 ăInstrument Options AĆ81 TableĂAĆ28 ăExternal Power AC Adapter Options AĆ81 Contents xiv TableĂAĆ27 ăInstrument Options AĆ81 TableĂAĆ28 ăExternal Power AC Adapter Options AĆ81 ...

Страница 21: ...Overview Overview ...

Страница 22: ......

Страница 23: ...oduct catalog or in the U S call the Tektronix National Marketing Center tollĆfree at 1Ć800Ć426Ć2200 222PS Operator Manual 1Ć1 Overview This section summarizes the product features and safety precautions of the 222PS PowerScout About the 222PS PowerScout The Tektronix 222PS PowerScout is a portable digitizing oscilloscope It has two fully isolated independently floatable channels rated to 600 VACR...

Страница 24: ...r practices that could result in personal injury or loss of life These two terms appear on equipment Overview Overview 1Ć2 Safety You may be eager to begin using your Tektronix 222PS but please take a moment to review these safety precautions We provide them for your protection and to prevent damage to the 222PS PowerScout This safety information applies to all operators and service personnel WARN...

Страница 25: ...ropriate external power AC adapter Use only external power AC adapters specified for this instrument Overview 222PS Operator Manual 1Ć3 H CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself H DANGER indicates a personal injury hazard immediately accessiĆ ble as one reads the marking This symbol appear...

Страница 26: ...to a probe or connector on the 222PS that is outside the range specified for that probe or connector Overview Overview 1Ć4 Grounding the PowerScout Ċ The channel 1 and channel 2 measurement inputs of the 222PS are doubly insulated from each other and all other accessible portions of the instrument cabinet It is not necessary to ground the instrument to avoid electric shock Fuse Ċ The 222PS has no ...

Страница 27: ...At a Glance At a Glance ...

Страница 28: ......

Страница 29: ...led In Detail This section provides page references to the In Detail chapter for further information 222PS Operator Manual 2Ć1 At a Glance This chapter describes the controls connectors and display readouts of the 222PS PowerScout It is intended to help orient you and to provide basic information For more detailed operating instructions for various features see the appropriate section in the chapt...

Страница 30: ... the horizontal aspects of your signal See page 3Ć25 for more information on the horizontal controls At a Glance At a Glance 2Ć2 Front Panel Controls The front panel for the 222PS PowerScout appears as shown in Figure 2Ć1 1 6 5 4 3 2 Figure 2Ć1 ă222PS Front Panel 1 The display area includes the screen and associated buttons The screen shows signal traces readouts and menu items Buttons along the s...

Страница 31: ...towards the bottom of the screen For more information on setting the vertical position see page 3Ć77 At a Glance 222PS Operator Manual 2Ć3 5 AUTO SETUP allows you to set up the instrument with the push of a single button Press this button for a quick informative display of any signal between 20 Hz and 1 MHz See page 3Ć5 for more information on the AUTO SETUP button 6 The ON button toggles the inst...

Страница 32: ...hat allows you to specify the trigger mode For a complete explanation of trigger modes see page 3Ć72 At a Glance At a Glance 2Ć4 You can also use this knob to change the size of a signal to an arbitrary number of divisions To do so see page 3Ć78 3 The 222PS can display signals acquired through either or both of its two channels The channel selector buttons allow you to select the channel that is a...

Страница 33: ...the seconds per division Setting the seconds per division is disĆ cussed in more detail on page 3Ć26 At a Glance 222PS Operator Manual 2Ć5 3 When you push the button labeled SOURCE you invoke a menu that allows you to specify the trigger source For a complete explanation of trigger sources see page 3Ć64 4 The light labeled TRIG D turns on when the instrument is trigĆ gered See page 3Ć63 for more d...

Страница 34: ...the display The readouts on the left refer to channel 1 The readouts on the right refer to channel 2 At a Glance At a Glance 2Ć6 2 The inner knob sets the horizontal position of the signal Turn the knob clockwise to move the signal to the right Turn it counterĆ clockwise to move the signal to the left For more information on setting the horizontal position see page 3Ć25 You can also use this knob ...

Страница 35: ...row indicates that the channel is inverted For more information on inverting a channel see page 3Ć22 At a Glance 222PS Operator Manual 2Ć7 6 7 5 4 2 1 3 Figure 2Ć5 ăVertical Readouts 1 The indicates that the waveform is uncalibrated For more information on uncalibrated waveforms see page 3Ć78 2 The indicates AC coupling For more information on coupling see page 3Ć19 A indicates ground coupling 3 T...

Страница 36: ...ntal Readouts Ċ Figure 2Ć7 shows the horizontal and trigger readouts along the bottom of the display At a Glance At a Glance 2Ć8 Saved Waveform Readouts Ċ Figure 2Ć6 shows the saved waveform readouts above the bottom of the display The readouts refer to the last saved waveform displayed For more information on saved waveforms see page 3Ć51 5 4 3 2 1 Figure 2Ć6 ăSaved Waveform Readouts 1 This indic...

Страница 37: ...play you can select one of its items to perform an action Figure 2Ć8 illustrates the parts of a menu At a Glance 222PS Operator Manual 2Ć9 5 4 3 1 2 Figure 2Ć7 ăTrigger and Horizontal Readouts 1 The second from the left readout is the trigger slope A indiĆ cates that triggering occurs on a rising edge A indicates that triggering occurs on a falling edge For more information on trigger slope see pa...

Страница 38: ...on you can perform 4 The name of the menu appears at the top left of the display followed by a colon At a Glance At a Glance 2Ć10 CHOICE 1 NAME CHOICE 2 CHOICE 3 CHOICE 4 2 3 4 1 Figure 2Ć8 ăParts of a Menu 1 The button labeled CLEAR erases the menu from the display 2 The menu buttons are next to the screen along its right edge Pressing the button next to a menu item performs the action represente...

Страница 39: ...ify the acquisition mode of the instrument For more information about acquisition modes see page 3Ć1 At a Glance 222PS Operator Manual 2Ć11 Top Panel Controls The top panel for the 222PS PowerScout appears as shown in FigĆ ure 2Ć9 4 2 3 5 6 7 8 1 Figure 2Ć9 ă222PS Top Panel 1 Pressing this button invokes a menu that allows you to recall saved waveforms See page 3Ć53 2 Pressing this button toggles ...

Страница 40: ... See page 3Ć55 8 Pressing this button invokes a menu that allows you to save waveforms See page 3Ć51 At a Glance At a Glance 2Ć12 4 Pressing this button invokes a menu that allows you to specify whether to invert a channel display signals in XY mode or display signal readouts For more information about inverting channels see page 3Ć22 For more information about XY mode see page 3Ć81 For more infor...

Страница 41: ...e pouch when you are not using them You do not need to disconĆ nect the probes before you store them At a Glance 222PS Operator Manual 2Ć13 Side Connectors The right side of the 222PS PowerScout appears as shown in FigĆ ure 2Ć10 2 1 3 Figure 2Ć10 ăSide of 222PS Storage Pouch Removed 1 This is the probe connector for channel 1 2 This is the probe connector for channel 2 3 This is the battery connec...

Страница 42: ...ob focuses the 222PS screen Insert a small screwdriver into the slot and turn it to adjust the focus At a Glance At a Glance 2Ć14 Rear Panel Controls and Connectors The rear panel for the 222PS PowerScout appears as shown in FigĆ ure 2Ć11 2 3 4 5 8 7 6 1 Figure 2Ć11 ă222PS Rear Panel 1 This panel points to the probe inputs on the instrument s side and indicates the 222PS maximum input voltage rati...

Страница 43: ...e input to run the instrument from line voltage See page 3Ć41 for more information on external power At a Glance 222PS Operator Manual 2Ć15 5 This knob varies the brightness of the 222PS screen See page 3Ć23 for more information on screen brightness 6 This is the external trigger common reference connector To use a grounded reference with your external trigger source connect the reference signal h...

Страница 44: ... pull the tilt stand forward until the instrument rests on it Figure 2Ć12 ăThe 222PS With Tilt Stand At a Glance At a Glance 2Ć16 The Tilt Stand The 222PS PowerScout comes with a tilt stand so that you can view the frontĆpanel and screen more easily The tilt stand folds under the instrument when not in use To use it lift the instrument and pull the tilt stand forward until the instrument rests on ...

Страница 45: ...In Detail In Detail ...

Страница 46: ......

Страница 47: ...de In auto baseline trigger mode the instrument displays the last waveform acquired it is unaveraged 222PS Operator Manual 3Ć1 Acquisition Modes Acquiring signals involves accepting an analog electrical signal sampling it and producing a waveform The 222PS allows you to specify how the instrument acquires the signal and constructs a waveform This is the acquisition mode of the instrument Kinds of ...

Страница 48: ...t continuous envelope mode are the horizontal and vertical position knobs and the trigger level knob Acquisition Modes In Detail 3Ć2 Envelope Acquisition Mode In envelope mode the instrument displays the positive and negative peak signal values that occur during a display sample interval This mode is useful for detecting glitches such as unwanted peaks in a signal NOTE Envelope acquisition mode fu...

Страница 49: ...de takes effect and the menu disapĆ pears NORM ACQ ENV AVG CONT ENV Figure 3Ć2 ăThe Acquisition Menu Acquisition Modes 222PS Operator Manual 3Ć3 Figure 3Ć1 summarizes the effects of averaging and envelope modes on a signal Figure 3Ć1 ăNormal Average and Envelope Signals Selecting an Acquisition Mode To choose an acquisition mode follow these steps ĂĂStep 1 ăPress the ACQ button on the top panel to...

Страница 50: ...Acquisition Modes In Detail 3Ć4 Acquisition Modes In Detail 3Ć4 ...

Страница 51: ...on H If neither channel is receiving a signal the 222PS turns on chanĆ nel 1 and turns off channel 2 222PS Operator Manual 3Ć5 Auto Setup The 222PS allows you to obtain a readable display of a waveform by pushing a single button You can also set up the instrument in a specific way and then save the setting in memory see page 3Ć55 This section discusses various automatic ways to set up the instruĆ ...

Страница 52: ...ions to the seconds per division knob to get a useful display Table 3Ć1 shows all AUTO SETUP actions Auto Setup In Detail 3Ć6 Vertical Scaling The 222PS then determines the characteristics of the signal so it can produce a useful display The 222PS sets the vertical position to display the signal in the center of the screen If both channels have a signal the 222PS displays both signals The instrume...

Страница 53: ...al exists or if channel 2 has no signal NOTE AUTO SETUP does not disable the motor trigger selection Auto Setup 222PS Operator Manual 3Ć7 TableĂ3Ć1 ă Auto Setup Settings Control Setting After Auto Setup VOLTS DIV As determined by signal VOLTS DIV VAR Calibrated Coupling AC if in AC before and if a signal exists otherwise DC if a signal exists otherwise OFF Acquisition mode Normal STORE NONSTORE NO...

Страница 54: ...Auto Setup In Detail 3Ć8 Auto Setup In Detail 3Ć8 ...

Страница 55: ... on the top panel to display the auxiliary functions menu The display appears as shown in Figure 3Ć3 222PS Operator Manual 3Ć9 Calibration The 222PS has a vertical channel selfĆcalibration routine to maintain best balance and accuracy with temperature variations Running the SelfĆCalibration Routine To achieve the specified performance you should recalibrate the 222PS any time the ambient temperatu...

Страница 56: ...on Menu NOTE The PROBE selection on the SELF CAL menu is for use by qualified service personnel only Calibration In Detail 3Ć10 ALIGN AUX CONFIG SELF CAL MOTOR TRIG Figure 3Ć3 ăThe Auxiliary Functions Menu ĂĂStep 3 ăPress the menu button next to the SELF CAL menu item to access the calibration menu The display now appears as shown in Figure 3Ć4 CH1 SELF CAL EXT TRIG PROBE CH2 Figure 3Ć4 ăThe Calib...

Страница 57: ...on reference connector on the rear panel Use a jumper cable with a banana plug connector on each end Calibration 222PS Operator Manual 3Ć11 ĂĂStep 4 ăTo begin the selfĆcalibration routine for channel 1 press the menu button next to CH1 This routine takes about a minute to perform When it is finished the instrument displays PASS or FAIL If PASS appears on the screen channel 1 s recalibration was su...

Страница 58: ...lay as shown in Figure 3Ć5 CAL GND EXT TRIG Figure 3Ć5 ăThe Ground External Trigger Calibration Menu Calibration In Detail 3Ć12 NOTE To calibrate the external trigger input the TRIG COM connector must be connected to the EXT TRIG INPUT connector ĂĂStep 7 ăInvoke the menu again and press the menu button next to EXT TRIG A new menu appears on the display as shown in Figure 3Ć5 CAL GND EXT TRIG Figur...

Страница 59: ... are done press the CLEAR button above the menu buttons to return the instrument to normal operation Calibration 222PS Operator Manual 3Ć13 ĂĂStep 8 ăPress the menu button next to CAL to begin the calibraĆ tion Follow the procedure outlined in Step 4 ĂĂStep 9 ăWhen you are done press the CLEAR button above the menu buttons to return the instrument to normal operation ...

Страница 60: ...Calibration In Detail 3Ć14 Calibration In Detail 3Ć14 ...

Страница 61: ...ce Press the button labeled MODE on the front panel Press the menu button next to the menu item SSEQ 222PS Operator Manual 3Ć15 Capturing Random Events Capturing random electric events in circuits is difficult and timeĆconĆ suming You can use the 222PS s single sequence mode to make the task easier SingleĆsequence mode is one of four trigger modes you can use with the 222PS In singleĆsequence mode...

Страница 62: ...tion and displays the waveform with the captured trigger event until you press the INIT button again Capturing Random Events In Detail 3Ć16 ĂĂStep 8 ă Check that the sweep triggers each time the INIT button is pressed If it does not readjust the trigger level control slightly until the sweep triggers each time you press INIT The TRIG D indicator lights when the instrument triggers ĂĂStep 9 ăDiscon...

Страница 63: ...ng signals for two channels Channel 1 is selected 5mV 5V 46 7mV 2mS Figure 3Ć6 ăChannel One Selected 222PS Operator Manual 3Ć17 Channels The 222PS has two fully isolated input channels with which you can make floating measurements With signals of up to 600 VACRMS input you can make measurements as you would with a volt meter This section explains how to select a channel display the signal it acqui...

Страница 64: ...splay However until you select channel 1 for another purpose channel 2 is still the selected channel Channels In Detail 3Ć18 Displaying a Channel When a channel is on the 222PS displays any signal it acquires through that channel When a channel is off the 222PS does not display its signal If either channel is off the screen displays OFF instead of its voltsĆperĆdivision value Even when a channel i...

Страница 65: ...boxed it is already the selected coupling Press the CLEAR button to remove the menu from the display Channels 222PS Operator Manual 3Ć19 To display a channel you have turned off repeat the above procedure until you see the menu on the screen Then select the type of coupling you wish to use for the channel signal The following section describes how to select the channel coupling NOTE When a channel...

Страница 66: ...Channels In Detail 3Ć20 Channels In Detail 3Ć20 ...

Страница 67: ...play menu Figure 3Ć8 shows the display menu INV1 DISPLAY INV2 XY RO OFF Figure 3Ć8 ăThe Display Menu 222PS Operator Manual 3Ć21 The Display The 222PS display shows you menus signals and readouts This section explains how you can control the information displayed to you Readouts Readouts include volts per division for each signal seconds per division and trigger level The instrument also displays a...

Страница 68: ...se steps ĂĂStep 1 ăPress the DISPL button on the top panel to invoke the display menu See Figure 3Ć8 The Display In Detail 3Ć22 ĂĂStep 2 ăPress the menu button next to the bottom menu item RO OFF The menu disappears and the screen displays only the signal ĂĂStep 3 ăIf you wish to turn the readouts back on again repeat the above procedure The next time you access the display menu the RO OFF item ap...

Страница 69: ...rewdriver into the center slot of the knob and rotate the knob until the display appears as you wish The Display 222PS Operator Manual 3Ć23 ĂĂStep 2 ăPress the button next to the menu item corresponding to the channel you wish to invert INV1 OR INV2 After you press the menu button the menu disappears and the inverted signal if any reappears on the screen A small downĆ arrow appears in front of the...

Страница 70: ...The Display In Detail 3Ć24 The Display In Detail 3Ć24 ...

Страница 71: ...orm at the horizontal position presently in effect not the horizontal position at which it was saved 222PS Operator Manual 3Ć25 Horizontal Operation This section discusses controlling the horizontal aspects of your signal The knobs used to do this are at the bottom left of the front panel as shown in Figure 3Ć10 Figure 3Ć10 ăThe Horizontal Controls The horizontal controls affect signals acquired t...

Страница 72: ...liased waveform A common symptom of aliasing is an unstable display even when the TRIG D light is on Horizontal Operation In Detail 3Ć26 Seconds per Division The 222PS can display a signal with a range of 20Ăs to 50Ăns If magniĆ fication is on the instrument s range is 2Ăs to 5Ăns This means that the 222PS can display a waveform that represents as long a period as 200Ăseconds or as short a period ...

Страница 73: ...g to fill using record timeĆbase mode Therefore the instrument uses one of scrolling timeĆbase modes Horizontal Operation 222PS Operator Manual 3Ć27 Actual HighĆFrequency Waveform Apparent LowĆFrequency Waveform Due to Aliasing Sampled Points Figure 3Ć11 ăAn Aliased Waveform To avoid aliasing make sure that your sample rate is fast enough for the frequency of the signal you wish to view Ċ usually ...

Страница 74: ... 50Ăms Normal or Envelope Averaging or Continuous Envelope Scroll or ScrollĆscan RecordĊ slow update Horizontal Operation In Detail 3Ć28 The instrument uses scroll mode for slow time bases when either autoĆlevel or autoĆbaseline trigger mode is in effect The instrument uses scrollĆscan mode for slow time bases when normal or single sequence trigger mode is in effect Averaging and continuous envelo...

Страница 75: ...ment completely acquires the waveĆ form To turn off magnification push the horizontal POS knob again Horizontal Operation 222PS Operator Manual 3Ć29 Magnifying the Signal You can magnify waveforms by ten times To do so push the inner horizontal control knob labeled POS When magnification is on each division contains five data points horizontally instead of the normal 50 The secondsĆperĆdivision re...

Страница 76: ...Horizontal Operation In Detail 3Ć30 Horizontal Operation In Detail 3Ć30 ...

Страница 77: ...the top panel to access the auxiliary functions menu The display now appears as shown in Figure 3Ć12 222PS Operator Manual 3Ć31 Maintenance The 222PS is covered by a standard Tektronix threeĆyear warranty If it fails during the warranty period return it to Tektronix for free servicing subject to the conditions of the warranty statement To arrange for warranty service or get an estimate for outĆofĆ...

Страница 78: ...the display identifying the instrument as shown in Figure 3Ć14 The version number you see may differ Maintenance In Detail 3Ć32 ALIGN AUX CONFIG SELF CAL MOTOR TRIG Figure 3Ć12 ăThe Auxiliary Functions Menu ĂĂStep 2 ăPress the menu button next to ALIGN This calls up the XY Alignment Menu as shown in figure 3Ć13 XY ALIGN IDENT Figure 3Ć13 ăXY Alignment Menu ĂĂStep 3 ăPress the menu button next to I...

Страница 79: ... or its equivalent to protect the outside finish and keep harmful subĆ stances out of the instrument Maintenance 222PS Operator Manual 3Ć33 TEKĆ222PS VER x xx Figure 3Ć14 ăThe Firmware Version Repackaging for Shipment Remember to put the instrument in its carry case before repacking If the original packing materials are unfit or unavailable then repackage the instrument in the following manner 1 U...

Страница 80: ... industrial stapler or strapping tape 7 Call 1Ć800ĆTEKĆWIDE 1Ć800Ć835Ć9433 for shipping instructions Maintenance In Detail 3Ć34 5 Cushion the instrument on all sides with three inches of padding material or urethane foam tightly packed between the carton and the instrument 6 Seal the shipping carton with an industrial stapler or strapping tape 7 Call 1Ć800ĆTEKĆWIDE 1Ć800Ć835Ć9433 for shipping inst...

Страница 81: ... follow these steps ĂĂStep 1 ăPlace the oscilloscope on its left side as viewed from the front panel 222PS Operator Manual 3Ć35 Power You can operate the 222PS by using the internal battery or by plugĆ ging it into external power This section explains how to do both It also explains how to charge and change the battery when necessary Battery Operation The 222PS comes supplied with a battery for us...

Страница 82: ... possible charge the battery for three hours See the following instructions for charging the battery Power In Detail 3Ć36 ĂĂStep 2 ăOpen the probe pouch and disconnect the probes ĂĂStep 3 ăSlide the battery compartment cover and probe pouch toward the rear of the instrument to unlock the locking tabs ĂĂStep 4 ăLift the battery compartment cover and remove it The instrument now appears as shown in ...

Страница 83: ... turns itself off after two minutes of operating under battery power with no changes to the controls Power 222PS Operator Manual 3Ć37 Charging the Battery During periods of heavy use in a harsh environment you will need to recharge the battery after three hours of operation Under better circumstances it may need recharging less often The battery will last longer if you recharge the instrument afte...

Страница 84: ...shows the configuration menu TIME OUT CONFIG BAUD MODEM ON PROBE Figure 3Ć17 ăThe Configuration Menu Power In Detail 3Ć38 You can disable the timeĆout feature so that the instrument stays on for the life of the battery s charger You can also enable the timeĆout feature again when you wish To do so follow these steps ĂĂStep 1 ăPress the AUX FUNCT button on the top panel to display the auxiliary fun...

Страница 85: ...e on pageĂ3Ć35 ĂĂStep 7 ăRecharge the low battery as soon as possible See the procedure on page 3Ć37 Power 222PS Operator Manual 3Ć39 ĂĂStep 3 ăThe TIME OUT menu item appears boxed when the timeĆout feature is enabled To disable the timeĆout feature press the top menu button This menu item is a toggle Repeating this procedure reĆenables the timeĆout feature and boxes the menu item again ĂĂStep 4 ă...

Страница 86: ...he instrument and try again to charge it using a 20ĂV power supply that is currentĆlimited to 100ĂmA Power In Detail 3Ć40 Storing the Instrument When storing the instrument for a period shorter than two months leave the battery connected When the instrument is off the current drawn from the battery is less than 1ĂmA With the battery in place waveform settings and front panel setups remain in memor...

Страница 87: ...d of the External Power AC Adapter into the external power input on the rear panel of the instrument Power 222PS Operator Manual 3Ć41 ĂĂStep 3 ăDuring this operation check the power supply frequently for a currentĆlimited state If the battery recovers from its state of deep discharge it will cause the power supply to currentĆlimit Do not leave the battery connected to the external power supply wit...

Страница 88: ... the external power input above 42ĂV peak These inputs are not electrically isolated from each other Power In Detail 3Ć42 ĂĂStep 2 ăPlug the prong end of the External Power AC Adapter into an AC power source ĂĂStep 3 ăPress the ON button When the oscilloscope is operating under external power an external power indicator appears in the upper right corner of the display Other Sources of External Pow...

Страница 89: ...obe tip and earth ground between probe tip and probe common or between probe common and earth ground 222PS Operator Manual 3Ć43 Probes The 222PS comes with two P850 10X probes An additional 1X probe the P400 probe is available as an optional accessory The P850 probes provide high attenuation so that you can scale signals approaching 600 VACRMS for better display They are also useful for measuring ...

Страница 90: ...e pouch store them with the retractable hook tip attached to prevent unnecessary damage to the pouch Probes In Detail 3Ć44 Connecting the Probes The input connectors for the probes are inside the pouch over the battery compartment on the right side of the oscilloscope as you face the screen You must unzip or remove the pouch to access the conĆ nectors Probe Connectors Figure 3Ć18 ăSide View Showin...

Страница 91: ...he CONFIG menu item to access the configuration menu The display now appears as shown in Figure 3Ć20 Probes 222PS Operator Manual 3Ć45 Configuring the Probes To ensure that the 222PS is operating with the correct settings confiĆ gure the instrument to match the probes you are using To set the probe configuration follow these steps ĂĂStep 1 ăPress the AUX FUNCT button on the top panel to display th...

Страница 92: ...obe menu as shown in Figure 3Ć21 CH 1 1X PROBE CH 1 10X CH 2 1X CH 2 10X Figure 3Ć21 ăThe Probe Menu Probes In Detail 3Ć46 TIME OUT CONFIG BAUD MODEM ON PROBE Figure 3Ć20 ăThe Configuration Menu ĂĂStep 3 ăPress the menu button next to the PROBE menu item to access the probe menu as shown in Figure 3Ć21 CH 1 1X PROBE CH 1 10X CH 2 1X CH 2 10X Figure 3Ć21 ăThe Probe Menu ...

Страница 93: ... to the cable insert the connector at the end of the cable into the probe body until it seats firmly Probes 222PS Operator Manual 3Ć47 ĂĂStep 4 ăBoxes appear around the items that represent the current probe configuration The default configuration for the 222PS assumes 10X probes on both channels Therefore those menu items appear boxed unless you have already changed the probe configuration Press ...

Страница 94: ...Probes In Detail 3Ć48 Probe 1 3 4 2 Figure 3Ć22 ăProbe and Accessories Probes In Detail 3Ć48 Probe 1 3 4 2 Figure 3Ć22 ăProbe and Accessories ...

Страница 95: ...nts such as a component lead or test point connector This accessory frees your hands for other tasks Probes 222PS Operator Manual 3Ć49 1 You can use the detachable probe common lead shown in FigĆ ure 3Ć22 to connect the oscilloscope input common to the referĆ ence point of the circuit being tested The probe common lead is not chassis ground and you can connect it to an active circuit component You...

Страница 96: ...Probes In Detail 3Ć50 Probes In Detail 3Ć50 ...

Страница 97: ... display the waveform you wish to save ĂĂStep 3 ăPosition the waveform where you wish it to be saved 222PS Operator Manual 3Ć51 Saving and Recalling Data The 222PS has memory to store saved waveforms and frontĆpanel setups Data in this memory remains as long as the instrument has access to one of these power sources H a battery with a charge greater than 7 32ĂV see page 3Ć35 for a discussion of ba...

Страница 98: ...readouts of the parameters of the saved waveform at the bottom of the screen as shown in Figure 3Ć24 Saving and Recalling Data In Detail 3Ć52 ĂĂStep 4 ăPress the SAVE button on the top panel Acquisition stops the screen freezes and a menu appears as shown in Figure 3Ć23 1 SAVE CH1 WV 2 3 4 Figure 3Ć23 ăSaved Waveforms Menu If the waveform you are saving uses channel 1 the menu name is SAVE CH1 WV ...

Страница 99: ...w these steps ĂĂStep 1 ăPress the RCL button on the top panel A menu appears as shown in Figure 3Ć25 Saving and Recalling Data 222PS Operator Manual 3Ć53 In Figure 3Ć24 the waveform has been saved to memory locaĆ tion 1 and therefore named W1 Its vertical setting is 10 mV per division its coupling is DC as indicated by the and its horiĆ zontal setting is 10 ms per division 1 SAVE CH1 WV 2 3 4 W1 1...

Страница 100: ...orms ĂĂStep 5 ăTo erase a waveform from a memory location save another waveform to the same location Saving and Recalling Data In Detail 3Ć54 1 RECALL WVFRM 2 3 4 Figure 3Ć25 ăThe Recall Waveforms Menu ĂĂStep 2 ăPress the button next to the memory location that holds the waveform you wish to view The menu disappears and the 222PS displays the waveform at the same position in which it was saved wit...

Страница 101: ...h ĂĂStep 2 ăPress the SETUP button on the top panel to invoke the setup menu as shown in Figure 3Ć26 Saving and Recalling Data 222PS Operator Manual 3Ć55 Setups The 222PS can save four setups in its memory If you often use the same frontĆpanel setup to view certain signals you may wish to save the setup Saving a setup allows you to set the instrument up in the same way just by executing a menu ite...

Страница 102: ...hich you wish to save the setup Press the button next to the number representing the memory location Saving and Recalling Data In Detail 3Ć56 SAVE SET UP RECALL ERASE ERASE ALL Figure 3Ć26 ăThe Setup Menu ĂĂStep 3 ăPress the button next to the menu item SAVE A new menu appears as shown in Figure 3Ć27 1 SAVE SETUP 2 3 4 Figure 3Ć27 ăThe Save Setup Menu ĂĂStep 4 ăChoose the memory location to which ...

Страница 103: ...L A new menu appears as shown in Figure 3Ć28 1 RECALL SETUP 2 3 4 Figure 3Ć28 ăThe Recall Setup Menu Saving and Recalling Data 222PS Operator Manual 3Ć57 The 222PS saves the current instrument setup to the memory location you selected The menu disappears the display shows a signal again CAUTION If one of the numbers appears boxed as the number 1 does in Figure 3Ć27 the memory location already cont...

Страница 104: ... one setup press the button next to the menu item ERASE A new menu appears as shown in FigĆ ure 3Ć29 Saving and Recalling Data In Detail 3Ć58 ĂĂStep 3 ăMemory locations that contain instrument setups appear boxed Select one of the boxed memory locations to recall the setup you saved in it Press the button next to the number repreĆ senting the memory location The menu clears and the settings change...

Страница 105: ...NOTE If you choose a memory location without a setup in it the instrument beeps and the menu remains Saving and Recalling Data 222PS Operator Manual 3Ć59 1 ERA SETUPS 2 3 4 Figure 3Ć29 ăThe Erase Setups Menu ĂĂStep 3 ăMemory locations that contain instrument setups appear boxed Select the boxed memory location whose setup you wish to erase Press the button next to the number representing the memor...

Страница 106: ...Saving and Recalling Data In Detail 3Ć60 Saving and Recalling Data In Detail 3Ć60 ...

Страница 107: ...ter of the top panel This button is a toggle To take the instrument out of store mode press it again 222PS Operator Manual 3Ć61 Store Mode The 222PS can display signals in store and nonstore modes In store mode the instrument displays traces between trigger events In nonstore mode the 222PS displays traces only until the next display update about 30Ăms or until the next trigger If a trigger does n...

Страница 108: ...Store Mode In Detail 3Ć62 Store Mode In Detail 3Ć62 ...

Страница 109: ...ent may not trigger Readjust the volts per division setting so that your display amplitude is larger 222PS Operator Manual 3Ć63 Triggering The trigger controls are in the center of the front panel as shown in Figure 3Ć31 Figure 3Ć31 ăTrigger Controls This section explains how to control the various aspects of the trigger so that the instrument displays the waveform in the manner you require The Tr...

Страница 110: ...T specifies that the instrument use the signal from the external trigger input as the trigger source Triggering In Detail 3Ć64 Trigger Source The 222PS has the ability to use the signal from either channel as the trigger source An external signal from the external trigger input connector can also serve as the trigger source To set the trigger source follow these steps ĂĂStep 1 ăPress the SOURCE bu...

Страница 111: ...ference input to voltages greater than 42ĂV peak The trigger common reference input is not insulated Triggering 222PS Operator Manual 3Ć65 ĂĂStep 2 ăTo select the trigger source press the menu button next to the appropriate menu item You can also cycle through the menu choices by continuing to press the frontĆpanel SOURCE button The selected menu item appears boxed ĂĂStep 3 ăWhen you have selected...

Страница 112: ...when the instrument is triggered If you have trouble acquiring a trigger press the AUTOLVL PUSH knob Triggering In Detail 3Ć66 WARNING To avoid personal injury or damage to the 222PS or equipment connected to it do not float the external trigger common connector the RSĆ232 communications port or the external power input above 42ĂV peak These inputs are not electrically isolated from each other To ...

Страница 113: ...e motor trigger function suppresses stray trigger signals that result from line transients and noise Triggering 222PS Operator Manual 3Ć67 Motor Trigger Function The motor trigger function responds to pulse bursts such as those produced by uninterruptable power supplies UPS and variableĆfreĆ quency motor drives This function triggers on the first pulse that occurs in each burst if the interval bet...

Страница 114: ... Drive Signals Separated by a Low Region Figure 3Ć35 ăMotor Drive Signals Separated by a High Region Triggering In Detail 3Ć68 Figure 3Ć34 ăMotor Drive Signals Separated by a Low Region Figure 3Ć35 ăMotor Drive Signals Separated by a High Region ...

Страница 115: ...e outer knob clockwise raises the trigger level turning it counterclockwise lowers the trigger level Triggering 222PS Operator Manual 3Ć69 Trigger Coupling In the 222PS the coupling of the trigger source is the same as the coupling of the channel it is using An external trigger is always DCĆ coupled Trigger Slope To determine the trigger slope presently in use look at the bottom readouts At the le...

Страница 116: ...position when in nonstore mode the change will take effect when you put the instrument in store mode Triggering In Detail 3Ć70 AutoĆLevel You can also set the trigger level so that the instrument finds the peak values of the trigger signal and sets the trigger level at the midpoint This feature is called autoĆlevel It is useful for finding a trigger level quickly to trigger the display To do this ...

Страница 117: ...R Trigger Modes The 222PS has four trigger modes normal autoĆlevel auto baseline and singleĆsequence Triggering 222PS Operator Manual 3Ć71 To change the trigger position follow these steps ĂĂStep 1 ăPut the instrument in store mode by pressing the STORE button on the top panel ĂĂStep 2 ăPress the TRIG POS button on the top panel A menu appears on the display as shown in Figure 3Ć36 The trigger pos...

Страница 118: ...PUSH knob The instrument attempts to set the trigger level automatically when under three conditions Triggering In Detail 3Ć72 Normal When the instrument is in nonstore mode and normal trigger mode it behaves in a manner similar to that of an analog oscilloscope If a new trigger does not occur the instrument holds the waveform until the end of the update period Then the display is blanked until th...

Страница 119: ... menu appears as shown in Figure 3Ć37 The trigger mode presently in effect appears boxed in the menu Triggering 222PS Operator Manual 3Ć73 H when you first enter autoĆlevel trigger mode H when you push the AUTOLVL PUSH knob H when a trigger event has not occurred within a certain time period after the previous display of the trace The time the instrument waits after displaying the previous trace d...

Страница 120: ...ssing MODE repeatedly until the trigger mode you wish is selected Then press CLEAR to clear the menu Triggering In Detail 3Ć74 NORM TRIG MODE AUTOLVL AUTOBL SSEQ Figure 3Ć37 ăThe Trigger Mode Menu ĂĂStep 2 ăPress the menu button next to the menu item you wish to select The menu clears If the trigger mode you wish to use is already selected press CLEAR to clear the menu You can also cycle through t...

Страница 121: ...tical Positioning To position the selected channel signal vertically turn the inner knob labeled POS 222PS Operator Manual 3Ć75 Vertical Operation This section discusses controlling the vertical aspects of your signal The knobs you use to do this are at the top left of the front panel as shown in Figure 3Ć38 Figure 3Ć38 ăThe Vertical Controls These controls affect only the currently selected chann...

Страница 122: ...ected channel This symbol means the voltsĆ perĆdivision setting for that channel is now uncalibrated Vertical Operation In Detail 3Ć76 If the signal you are positioning is the trigger source the trigger point indicator a on the display follows the position of the signal If you position the signal off the screen the trigger point indicator remains at the top or the bottom of the screen to show the ...

Страница 123: ...appears from the readouts and you can now accurately determine the volts per division for the signal Vertical Operation 222PS Operator Manual 3Ć77 ĂĂStep 3 ăTo return the signal to a calibrated voltsĆperĆdivision readout press the POS knob in again ĂĂStep 4 ăHold the knob in while turning it clockwise slowly until you hear a beep The uncalibrated symbol disappears from the readouts and you can now...

Страница 124: ...Vertical Operation In Detail 3Ć78 Vertical Operation In Detail 3Ć78 ...

Страница 125: ...button next to the menu item XY The instruĆ ment clears the menu and displays its signals in XY mode 222PS Operator Manual 3Ć79 XY Mode When the 222PS is in XY mode it samples and digitizes the incoming signal just as it does when not in XY mode Therefore trigger level and secondsĆperĆdivision settings affect the XY display We recommend that before entering XY mode you set up your signals as you r...

Страница 126: ...ĂĂStep 3 ăSelect channel 2 ĂĂStep 4 ăRotate the vertical POS knob to position the trace verticalĆ ly XY Mode In Detail 3Ć80 NOTE Because XY mode depends on plotting one signal against another both channels must be on Therefore if either channel was off before you entered XY mode the instruĆ ment now turns it back on And when you are in XY mode neither channel can be turned off ĂĂStep 3 ăWhen you f...

Страница 127: ...Appendices Appendices ...

Страница 128: ......

Страница 129: ...n has five minor divisions Minor divisions are marked along the center vertical and horizontal lines 222PS Operator Manual AĆ1 Appendix A Tutorial This tutorial will get you started making basic signal measurements with the 222PS The Screen Making accurate measurements with an oscilloscope means determinĆ ing the voltage and timing of your signal from its size on the screen Therefore the screen of...

Страница 130: ...irst saved the waveform The scale factors in effect when you recall the waveform are unrelated to it Appendix A Tutorial Appendices AĆ2 Two horizontal dotted lines mark the 10 and 90 points of a signal that takes up six vertical divisions These lines can help you make riseĆ and fallĆtime measurements as explained on page AĆ7 Figure AĆ1 illustrates these markings Figure AĆ1 ăThe Screen Markings The...

Страница 131: ...tor is 0 2 volts per division Therefore the peakĆtoĆpeak voltage of the sine wave is 5 0 2 or 1Ăvolt Appendix A Tutorial 222PS Operator Manual AĆ3 Measuring PeakĆtoĆPeak Voltages To find the voltage of a waveform peakĆtoĆpeak follow these steps ĂĂStep 1 ăPosition the waveform so that either the lowest or the highest point peak is at the horizontal center of the screen In Figure AĆ2 the high peak i...

Страница 132: ...measurement point of the signal ĂĂStep 7 ăMultiply the number of divisions by the volts per division Appendix A Tutorial Appendices AĆ4 NOTE The voltsĆperĆdivision scale factor always refers to major divisions A minor division is oneĆfifth of a major division Using a Ground Reference Point To find the voltage of a waveform with respect to ground you must first set a ground reference level Then you...

Страница 133: ...the waveform are unrelated to it To measure the time a signal represents use the following procedure Appendix A Tutorial 222PS Operator Manual AĆ5 For example Figure AĆ3 shows a ground reference at the bottom of the screen The measurement point is the most negative voltage of the signal There are 3 5 major divisions between them 5 V Ground Reference Line Vertical Divisions Figure AĆ3 ăMeasuring Wi...

Страница 134: ... as indicated in the bottom right is 1Ăms per division Therefore one waveform period is 1 8 2 8 2Ăms Appendix A Tutorial Appendices AĆ6 ĂĂStep 1 ăPosition the waveform so that its center crosses the vertical center of the screen as shown in Figure AĆ4 Use the horizontal center line to help you ĂĂStep 2 ăCount the horizontal major and minor divisions occupied by one complete period of the waveform ...

Страница 135: ...hs of a division Multiplying 0 9 by a horizontal scale factor of 50Ăns gives us a rise time of 45Ăns Appendix A Tutorial 222PS Operator Manual AĆ7 Measuring RiseĆ or FallĆtime To measure the riseĆ or fallĆtime of a signal follow these steps ĂĂStep 1 ăPut the instrument in store mode Press the button labeled STORE on the top panel of the instrument ĂĂStep 2 ăSet the trigger position for the display...

Страница 136: ...time press the SLOPE button in the trigger controls area of the front panel and repeat the procedure Appendix A Tutorial Appendices AĆ8 10 90 5V 50 ns RiseĆTime SixĆdivision Signal Figure AĆ5 ăMeasuring RiseĆTime ĂĂStep 8 ăTo change from riseĆtime to fallĆtime press the SLOPE button in the trigger controls area of the front panel and repeat the procedure ...

Страница 137: ... 222PS to a PC using the RSĆ232 communications port located on the rear panel as shown in Figure AĆ6 222PS Operator Manual AĆ9 Appendix B Remote Communication This appendix provides detailed information on remote communication between a 222PS Digital Storage Oscilloscope and an IBM PC XT It contains the following subsections H Introductory Information H Setting the Baud Rate H Command Formats H Fr...

Страница 138: ...es both these possible arrangements Modem Modem Figure AĆ7 ăCommunication Between the 222PS and a PC Appendix B Remote Communication Appendices AĆ10 Figure AĆ6 ăRSĆ232 Communications Port You can connect the 222PS to a PC directly using the optional accesĆ sory cable If you connect the 222PS to a different model PC you may need a different cable You can also connect the 222PS to a PC through modem...

Страница 139: ... shown in FigĆ ure AĆ8 ALIGN AUX CONFIG SELF CAL MOTOR TRIG Figure AĆ8 ăThe Auxiliary Functions Menu Appendix B Remote Communication 222PS Operator Manual AĆ11 In either case the PC must run appropriate terminal emulation and communications software such as the CAT200 software package available from Tektronix or Procomm or a similar application If you are using the CAT200 software package from Tek...

Страница 140: ...Ć10 The selected baud rate appears boxed 9600 BAUD 1200 300 2400 Figure AĆ10 ăThe Baud Settings Menu Appendix B Remote Communication Appendices AĆ12 ĂĂStep 2 ăPress the menu button next to the menu item CONFIG to access the configuration menu as shown in Figure AĆ9 TIME OUT CONFIG MODEM ON PROBE BAUD Figure AĆ9 ăThe Configuration Menu ĂĂStep 3 ăPress the menu button next to the menu item BAUD This...

Страница 141: ...trument and the responses sent by the instrument Explanation for each is given in the following text Appendix B Remote Communication 222PS Operator Manual AĆ13 ĂĂStep 4 ăIf the baud rate currently selected is the rate you require press CLEAR Otherwise press the menu button next to the baud rate you require Then press CLEAR to remove the menu from the display Command Formats Commands front panel se...

Страница 142: ...ntĆpanel settings for the waveform data See Front Panel Encoding for the meanĆ ing of the characters Appendix B Remote Communication Appendices AĆ14 COMMANDS QUERIES RESPONSES CURV BUT DAC FP CURV ID TRG STA DAC FP CURV ID TRG READY DAC FP XXX Figure AĆ11 ăCommands Queries and Responses Commands Ċ The 222PS Digital Oscilloscope RSĆ232 interface supports these commands H CURV frame wfrm data This c...

Страница 143: ...able AĆ1 TableĂAĆ1 ăBUT Button Codes Code Simulated Button Press 1 CLEAR 2 Menu Item 0 3 Menu Item 1 Appendix B Remote Communication 222PS Operator Manual AĆ15 mode byte is composed of two characters that indicate the mode the 222PS requires to display a waveform Normally this byte will be 00 If the waveform is not completely filled which can happen at very high sweep speeds this byte will be 02 I...

Страница 144: ...and EXT and the variable vertical gain CH1 and CH2 See Table AĆ2 for the DAC code and DAC value data Appendix B Remote Communication Appendices AĆ16 TableĂAĆ1 ăBUT Button Codes Cont Code Simulated Button Press 4 Menu Item 2 5 Menu Item 3 6 OFF 9 Trigger SOURCE A Trigger MODE B Trigger SLOPE C CH 2 Select D Ch1 Select E AUTO SETUP 11 FrontĆPanel Setup Menu 12 Trigger Position Menu 13 Auxiliary Func...

Страница 145: ...ffected by the selected probe configuration in the 222PS instrument see Front Panel Encoding section Appendix B Remote Communication 222PS Operator Manual AĆ17 TableĂAĆ2 ăDAC Code and Value Data DAC DAC Code Range Scale Reference Horiz POSITION 00 0 1FFC 5 div Full left 0 CH 1 Trigger LEVEL 01 0 1FFC 30 div Center 0FFF CH 2 Trigger LEVEL 02 0 1FFC 30 div Center 0FFF EXT Trigger LEVEL 03 0 1FFC 2 3...

Страница 146: ...ive channel before it acquires a waveform the response you receive will contain unreliable wfrm data Appendix B Remote Communication Appendices AĆ18 Queries Ċ The 222PS Digital Storage Oscilloscope RSĆ232 interface supports the following queries H CURV frame This query requests waveform data The instrument sends waveĆ form data as hexĆencoded ASCII characters frame is one of six possible sources f...

Страница 147: ... is given in Tables AĆ3 through AĆ6 each table shows the decoding for one of the hexaĆ decimal bytes Appendix B Remote Communication 222PS Operator Manual AĆ19 Responses Ċ The following responses occur as a result of the associated query NOTE If the query or command is terminated by a semicolon responses will be terminated by a semicolon If the query or command is terminated by a carriage return t...

Страница 148: ...setup string when it is sent back to the oscilloscope The string sent back then is FP ACQ 27240C2112 Appendix B Remote Communication Appendices AĆ20 NOTE If you send fp data originally taken from a location where a setup had not yet been saved the resulting instrument setup will be unreliable possibly inducing a lock up condition NOTE REF1 through REF4 front panel volts can be affected by probe co...

Страница 149: ...S CLPG 5 4 BIT VAR 6 0 CAL d 1 UNCAL d BIT INVERT 7 0 OFF 1 ON Available for recalled waveforms only Appendix B Remote Communication 222PS Operator Manual AĆ21 TableĂAĆ3 ăChannel Settings 0 0 0 0 5 mV 0 0 0 1 10 mV 0 0 1 0 20 mV 0 0 1 1 50 mV 0 1 0 0 0 1 V 0 1 0 1 0 2 V 0 1 1 0 0 5 V 0 1 1 1 1 V 1 0 0 0 2 V 1 0 0 1 5 V 1 0 1 0 10 V 1 0 1 1 20 V 1 1 0 0 50 V 1 1 0 1 100 V 1 1 1 0 200 V CHAR 2 CHAR ...

Страница 150: ... 5 will also have to change from 0 to 1 in the setup example string while character 6 changes to a 1 Appendix B Remote Communication Appendices AĆ22 SEC DIV Setting Characters 5 and 6 from the example string are 0 and C In binary bits these characters are 0000 and 1100 respectively You can see from Table AĆ4 that the bits of character 5 define several settings of the front panel The example bit va...

Страница 151: ...R 5 BYTE 3 7 6 5 4 3 2 1 0 BITS BIT 7 RO OFF XY X10 MAG BIT 6 BIT 5 OFF ON 0 1 OFF ON 0 1 OFF ON 0 1 Appendix B Remote Communication 222PS Operator Manual AĆ23 TableĂAĆ4 ăSecondsĆperĆDivision and Misc Settings 4 3 2 1 0 0 0 0 0 0 50 ns 0 0 0 0 0 1 0 1 ms 1 0 0 0 1 0 0 2 ms 2 0 0 0 1 1 0 5 ms 3 0 0 1 0 0 1 ms 4 0 0 1 0 1 2 ms 5 0 0 1 1 0 5 ms 6 0 0 1 1 1 10 ms 7 0 1 0 0 0 20 ms 8 0 1 0 0 1 50 ms 9 ...

Страница 152: ...o VERT Trigger SOURCE The last three bits of character 8 are 001 and decode to AUTO LVL Trigger MODE Appendix B Remote Communication Appendices AĆ24 Trigger Positions Slope Source and Mode Settings Characters 7 and 8 of the frontĆpanel setup string define several of the trigger settings of the instrument Two bit values of the characters are used to define the Trigger SOURCE setting bit 4 of charac...

Страница 153: ...TS BITS 7 6 0 0 POST 0 1 MID 1 0 PRE TRIG SLOPE 0 0 VERT 0 1 CH 1 1 0 CH 2 1 1 EXT TRIG SRC BITS 4 3 Appendix B Remote Communication 222PS Operator Manual AĆ25 TableĂAĆ5 ăTrigger Position Slope Source and Mode Settings BIT 0 1 5 0 0 0 NORM 0 0 1 AUTO LVL 0 1 0 AUTOBL 0 1 1 SSEQ TRIG POS TRIG MODE 2 1 0 CHAR 8 CHAR 7 BYTE 4 7 6 5 4 3 2 1 0 BITS BITS 7 6 0 0 POST 0 1 MID 1 0 PRE TRIG SLOPE 0 0 VERT ...

Страница 154: ...as follows H The Acquisition MODE 2 bits is NORM H It is in STORE mode H AUTO TRIGGER is not enabled Appendix B Remote Communication Appendices AĆ26 Acquisition Mode and Miscellaneous Settings Characters 9 and 10 of the front panelĆsetup string define the remainĆ ing settings not defined by the other 8 characters Table AĆ6 shows setup state controlled by each bit The only twoĆbit setting is for Ac...

Страница 155: ... CHAR 10 CHAR 9 BYTE 5 7 6 5 4 3 2 1 0 7 0 YES 1 NO TIME OUT 6 5 VALID STORE STORE MODE BIT 1 NO YES Appendix B Remote Communication 222PS Operator Manual AĆ27 TableĂAĆ6 ăAcquisition Mode and Misc Settings BIT 0 CH2 1 CH1 BIT CHAN SEL 0 NO 1 YES BIT RCL D WFM 0 NO 1 YES 4 BIT 0 NONSTORE 1 STORE AUTO TRIG ENABLED BIT 0 0 1 0 0 NORM 0 1 ENV 1 0 AVG 1 1 C ENV ACQ MODE BITS 3 2 CHAR 10 CHAR 9 BYTE 5 7...

Страница 156: ... programming error 4 EEPROM calibration constant area error 8 Calibration error F Fatal system error Appendix B Remote Communication Appendices AĆ28 RSĆ232 Error Codes When you connect the instrument to a terminal or PC you can read RSĆ232 error codes There are two types of error codes Status mesĆ sages result from a command error diagnostic error codes result from errors that occur during normal ...

Страница 157: ...set search error 05 Offset range error 06 Offset gain error 07 Gain range error 08 Gain search error Appendix B Remote Communication 222PS Operator Manual AĆ29 x the channel affected by the error 1 Channel 1 2 Channel 2 0 Channel not specified yy the error code The value depends on the type of error 0 2 4 8 or F at the w position in the portion of the first code group wxyy as follows Error type 0 ...

Страница 158: ...may be used to control a remote instrument and to transfer waveforms between the instrument and a PC Appendix B Remote Communication Appendices AĆ30 09 Trigger search error 10 Trigger offset range error 11 Trigger gain error 12 Trigger hysteresis error 13 External trigger offset range error 14 External trigger hysteresis error 15 Clock delay error 16 Acquisition delay error Error type F 00 COP tim...

Страница 159: ...ity either by command or by exiting the terminal communications utility without hanging up the modem Appendix B Remote Communication 222PS Operator Manual AĆ31 The software utility program you have will determine the operations you need for controlling the modem If the software does not have a modem control routine you must first use a terminal communications utility to make the modem connection Y...

Страница 160: ...e on and RTS is ignored Baud Rates 300 1200 2400 9600 0 1 accuracy based on the microprocessor clock Appendix B Remote Communication Appendices AĆ32 ĂĂStep 3 ăThe PC operator is now in control of the instrument and may request waveforms from it Waveforms may be transferred from the reference memories and from the two vertical channels If the PC operator needs more waveforms the instrument operator...

Страница 161: ...he front panel under CAT200 programming NOTE You must use CAT200 Version 1 2 or above with the 222PS Appendix B Remote Communication 222PS Operator Manual AĆ33 Levels Compatible with RSĆ232ĆC Maximum Applied Voltage 25 V DC peak AC to any pin Plotter Printer Support There is no plotter printer support in the instrument Messages UserĆmessage displays on the instrument CRT are not supported The cont...

Страница 162: ...TO DTE PC AT 1 CD 6 DSR 8 CD 1 CD 2ă RX 2 TX 3 RX 2 RX 3ă TX 3 RX 2 TX 3 TX 4ă DTR 8 CD 20 DTR 4 DTR Appendix B Remote Communication Appendices AĆ34 RSĆ232 Interconnection Cables The optional accessory RSĆ232 interconnection cable supports attachĆ ment of the instrument with its DEĆ9 connector to a PC XT or compatĆ ible with a DBĆ25 connector see Figure AĆ12 For connection to other types of equipm...

Страница 163: ...DSR 6 DSR 7 RTS 5 CTS 4 RTS 7 RTS 8ă CTS 4 RTS 5 CTS 8 CTS 9 RI 22 RI 22 RI 9 RI Connection optional Appendix B Remote Communication 222PS Operator Manual AĆ35 TableĂAĆ7 ă222PS Interconnect Pin Assignments Cont DCE Male at the DSO TO DTE PC AT TO DTE PC XT TO DCE Modem 5 SGND 7 GND 7 GND 5 SGND 6ă DSR 20 DTR 6 DSR 6 DSR 7 RTS 5 CTS 4 RTS 7 RTS 8ă CTS 4 RTS 5 CTS 8 CTS 9 RI 22 RI 22 RI 9 RI Connect...

Страница 164: ...Appendix B Remote Communication Appendices AĆ36 Appendix B Remote Communication Appendices AĆ36 ...

Страница 165: ...Tests directly check warranted specifications but they require more time and specific test equipment 222PS Operator Manual AĆ37 Appendix C Quick Checks This subsection contains quickĆtoĆperform procedures that you can use to verify that the 222PS functions properly The Self Cal Tests procedure uses internal routines to confirm that both input channels can be calibrated and that the display is work...

Страница 166: ...ter screen The symbol above is accompanied by information you must read to do the procedure properly Appendix C Quick Checks Appendices AĆ38 Conventions Throughout these procedures the following conventions apply H Each test procedure uses the following general format Title of Test Equipment Required Prerequisites Procedure H Each procedure consists of many steps substeps and subparts as required ...

Страница 167: ...lug Item 7 External Power AC Adapter standard accessory Item 3 Prerequisites Initial Setup Procedure Appendix C Quick Checks 222PS Operator Manual AĆ39 Initial Setup Procedure This procedure connects the oscilloscope to external power and installs probes for the tests that follow Equipment Required See Table AĆ8 page AĆ45 P850 probe standard accessory Item 13 External Power AC Adapter standard acc...

Страница 168: ...hooting in the Maintenance section of the 222PS service manual for an explanation of the error codes Appendix C Quick Checks Appendices AĆ40 Procedure 1 Press the AUX FUNCT button to bring up the AUX menu 2 Select SELF CAL from the menu NOTE Disconnect both the Channel 1 and Channel 2 probes from any signal source before performing the selfĆcalibraĆ tion routines 3 Select CH1 from the SELF CAL sub...

Страница 169: ...t indiĆ cates that most of the instrument s major systems are operational and will perform correctly Appendix C Quick Checks 222PS Operator Manual AĆ41 If the failure persists further information about the nature of the failure may be found by connecting the RSĆ232 interface port to a terminal or host computer and rerunning the failed selfĆcalibration routine A coded error message is output when t...

Страница 170: ...Appendix C Quick Checks Appendices AĆ42 Appendix C Quick Checks Appendices AĆ42 ...

Страница 171: ...ce H You must perform and pass the selfĆcalibration routines and functional tests found on page AĆ39 222PS Operator Manual AĆ43 Appendix D Performance Tests This section contains a collection of procedures for checking that the 222PS Digital Storage Oscilloscope performs as warranted There are three primary performance verification sequences H Vertical Checks H Horizontal Checks H Trigger Checks T...

Страница 172: ...fication column to determine if any other available test equipment might be adequate to do the check Appendix D Performance Tests Appendices AĆ44 Related Information Read General Instructions and Conventions that start on page AĆ37 Equipment Required Table AĆ8 lists all the test equipment required to do the performance check procedure Test equipment specifications described are the minimum necessa...

Страница 173: ...oaxial 50 W 36 in maleĆ toĆmale BNC conĆ nectors Tektronix part number 012Ć0482Ć00 Signal connection Appendix D Performance Tests 222PS Operator Manual AĆ45 TableĂAĆ8 ăTest Equipment Item Number and Description Minimum Requirements Example Purpose 1 Adapter Connectors BNC maleĆtoĆdualĆbaĆ nanaĆjack Tektronix part number 103Ć0035Ć00 Signal connection 2 Calibration Generator StandardĆampliĆ tude sig...

Страница 174: ...part number 176Ć0120Ć00 Interconnect beĆ tween the BNCĆ toĆdualĆbanana jack and probe tip and ground Appendix D Performance Tests Appendices AĆ46 TableĂAĆ8 ăTest Equipment Cont Item Number and Description Purpose Example Minimum Requirements 7 Connector dualĆbanana BNC femaleĆtoĆ dualĆbanana plug Tektronix part number 103Ć0090Ć00 Signal coupling to External TrigĆ ger and ComĆ mon inputs 8 Connecto...

Страница 175: ...Power AC Adapter connected Power ON FrontĆPanel Controls AUTO SETUP Press for initial signal display Appendix D Performance Tests 222PS Operator Manual AĆ47 Preparation The performance verification procedure is divided into subsections to let you check individual sections of the instrument when it is not necessary to do the complete performance check An Equipment Required block at the beginning of...

Страница 176: ... Item 12 Prerequisites Self Tests and Autoset Tests starting on page AĆ39 Preliminaries on page AĆ47 Appendix D Performance Tests Appendices AĆ48 Procedure 1 Check Adjust Intensity Control a Adjust the INTEN control for a sharp display 2 Adjust FOCUS Control a Press the AUX FUNCT button on the top panel b Select the ALIGN menu choice then the XY menu choice These selections display a test pattern ...

Страница 177: ...CH 1 Coupling GND CH 1 Variable CAL Horizontal Area SEC DIV 1 ms X10 MAG OFF POS center the waveform Appendix D Performance Tests 222PS Operator Manual AĆ49 Output Sine Wave Generator Calibration Generator Figure AĆ13 ăInitial Setup for Vertical Checks Initial Control Settings Power and Display External Power External Power AC Adapter connected Power ON Vertical Area CH 2 VOLTS DIV 50 mV CH 2 Coup...

Страница 178: ...l Controls TRIG POS POST STORE STORE DISPL INV1 OFF INV2 OFF XY OFF RO OFF OFF not selected ACQ NORM Appendix D Performance Tests Appendices AĆ50 Trigger Area Trigger MODE AUTOBL Trigger SOURCE VERT Trigger SLOPE Top Panel Controls TRIG POS POST STORE STORE DISPL INV1 OFF INV2 OFF XY OFF RO OFF OFF not selected ACQ NORM ...

Страница 179: ...s a through n for channel 2 2 Check Input Coupling Set up the test equipment as shown in Figure AĆ14 Appendix D Performance Tests 222PS Operator Manual AĆ51 Procedure 1 Check Input Current DC Balance and Invert Balance a Connect the channel 1 ground lead to the probe tip b Press the CLEAR button to clear the display c Vertically position the channel 1 trace to the center horizontal graticule line ...

Страница 180: ...proximately vertical center screen f Set CH 2 Coupling CH2 OFF CH 1 Coupling DC CH 1 VOLTS DIV 0 5 V Appendix D Performance Tests Appendices AĆ52 Calibration Generator BNCĆtoĆBananaĆ Jack Adapter with Wire Leads Channel 2 Probe Figure AĆ14 ăSetup for Input Coupling Check a Set CH 2 Coupling DC SEC DIV 0 5 ms Trigger MODE AUTOLVL CH 2 VOLTS DIV 0 5 V b Set the Calibration Generator to a standardĆam...

Страница 181: ... 5 20 div 4 80 div 5 20 div 3 84 div 4 16 div 1 These ranges are available only with a P400 X1 probe Appendix D Performance Tests 222PS Operator Manual AĆ53 g Disconnect the channel 2 probe from the test equipment and connect the channel 1 probe h Repeat parts c d and e for channel 1 3 Check the VoltsĆperĆDivision Accuracy a Set Calibration Generator for a standardĆamplitude output signal of 0 2 V...

Страница 182: ...Check Probe Compensation Low Frequency Pulse Response a Set up the equipment as shown in Figure AĆ15 Appendix D Performance Tests Appendices AĆ54 TableĂAĆ9 ăVoltsĆperĆDivision Accuracy Settings Cont Volts Div Amplitude Limits Calibration Generator 1 V 2 V 5 V 5 V 10 V 20 V 4 80 div 5 20 div 4 80 div 5 20 div 3 84 div 4 16 div 10 V 20 V 50 V 50 V 100 V 100 V 4 80 div 5 20 div 4 80 div 5 20 div 1 92...

Страница 183: ...ertical graticule line g CHECK for 0 15 division or less of rolloff or overshoot at the front corner Appendix D Performance Tests 222PS Operator Manual AĆ55 Calibration Generator BNCĆtoĆBananaĆ Jack Adapter with Wire Leads Channel 1 Probe 50 W Termination Figure AĆ15 ăSetup for Probe Compensation Check b Set CH 2 Coupling OFF CH 1 Coupling DC CH 1 VOLTS DIV 50 mV SEC DIV 0 2 ms TRIG POS MID c Set ...

Страница 184: ... SEC DIV 5 ms b Set the Leveled Sine Wave Generator for a display amplitude of 6 divisions at 50 kHz Appendix D Performance Tests Appendices AĆ56 h Set CH 1 Coupling CH1 OFF CH 2 Coupling DC CH 2 VOLTS DIV 50 mV i Disconnect the channel 1 probe from the BNCĆtoĆbananaĆ jack adapter and connect the channel 2 probe j Repeat parts e g for channel 2 k Disconnect the channel 2 probe from the test equipm...

Страница 185: ... Item 12 Prerequisites Self Tests and Autoset Tests starting on page AĆ39 Preliminaries on page AĆ47 Appendix D Performance Tests 222PS Operator Manual AĆ57 c Set the SEC DIV control to 50 ns d Set the Leveled Sine Wave Generator output frequency to 10 MHz e CHECK that the display amplitude is at least 4 2 divisions f Return the Leveled Sine Wave Generator output frequency to 50 kHz g Set CH 2 Cou...

Страница 186: ... CH2 OFF CH 1 Coupling DC CH 1 VOLTS DIV 0 1 V CH 1 VAR CAL Horizontal Area SEC DIV 1 ms X10 MAG OFF Appendix D Performance Tests Appendices AĆ58 Time Mark Generator 50 W Termination BNCĆtoĆBananaĆ Jack Adapter with Wire Leads Channel 1 Probe Figure AĆ17 ăSetup for Horizontal Test Initial Control Settings Power and Display External Power External Power AC Adapter connected Power ON Vertical Area C...

Страница 187: ...l graticule line d Horizontally position the left time marker with the first vertical graticule line Appendix D Performance Tests 222PS Operator Manual AĆ59 Trigger Area Trigger MODE AUTOLVL Trigger SOURCE VERT Trigger SLOPE Top Panel Controls TRIG POS POST STORE STORE DISPL INV1 OFF INV2 OFF XY OFF RO OFF OFF not selected ACQ NORM Procedure 1 Check X1 SecondsĆperĆDivision Accuracy a Press the CLE...

Страница 188: ... Item 12 Prerequisites Self Tests and Autoset Tests starting on page AĆ39 Preliminaries on page AĆ47 Appendix D Performance Tests Appendices AĆ60 e CHECK the accuracy over the center 8 divisions Accuracy should be 0 16 divisions 2 f Disconnect the test equipment from the oscilloscope Trigger Checks The Trigger Checks procedures verify those characteristics that relate to the trigger systems and th...

Страница 189: ... Vertical Area CH 2 Coupling CH2 OFF CH 2 VAR CAL CH 1 Coupling DC CH 1 VOLTS DIV 50 mV CH 1 VAR CAL Appendix D Performance Tests 222PS Operator Manual AĆ61 Sine Wave Generator 50 W Termination BNCĆtoĆBananaĆ Jack Adapter with Wire Leads Channel 1 Probe Figure AĆ18 ăSetup for Trigger Checks Initial Control Settings Power and Display External Power External Power AC Adapter connected Power ON Verti...

Страница 190: ...enerator to 50 kHz and adjust for a 5 division display amplitude h Set the SEC DIV control to 0 2 ms Appendix D Performance Tests Appendices AĆ62 Horizontal Area X10 MAG OFF SEC DIV 50 ns Trigger Area Trigger MODE AUTOLVL Trigger SLOPE Trigger SOURCE VERT Top Panel Controls TRIG POS POST STORE STORE DISPL INV1 OFF INV2 OFF XY OFF RO OFF OFF not selected ACQ NORM Procedure 1 Check Trigger Sensitivi...

Страница 191: ...ĆtoĆdualĆbananaĆplug connector to the EXT TRIG INPUT and EXT TRIG COMM input jacks on the rear panel Appendix D Performance Tests 222PS Operator Manual AĆ63 i Press INIT to restart the acquisition j CHECK that the display fills completely in less than 10 s 2 Check External Trigger Sensitivity Set up the test equipment as shown in Figure AĆ19 50 W Termination Sine Wave Generator BNCĆT Connector BNC...

Страница 192: ... displayed square wave is between 2 0 and 3 0 ms g Disconnect the test equipment from the instrument Appendix D Performance Tests Appendices AĆ64 d Vertically center the display e Set the Leveled Sine Wave Generator to display 5 divisions of amplitude at 50 kHz f CHECK for a triggered display TRIG D indicator light on g Set the SEC DIV control to 50 ns h Set the Leveled Sine Wave Generator to disp...

Страница 193: ...ltage 6000 V for 250 ms or less P850 only derate with increased frequency accordĆ ing to Figure AĆ20 222PS Operator Manual AĆ65 Appendix E Specifications This section contains a collection of tables that list the various traits that describe the 222PS PowerScout This section is divided into three subsections one for each of three classes of traits nominal traits warranted characteristics and typic...

Страница 194: ...perĆdivision settings faster than 5 ms Div Storage Bandwidths are limited to 1 MHz max sampling rate Appendix E Specifications Appendices AĆ66 TableĂAĆ10 ăNominal TraitsĊVertical System Cont Name Description Maximum Input Voltage Probe Common to Chassis 850 V DC peak AC or 600 VAC rms1 Peak Surge Voltage 6000 V for 250 ms or less P850 only derate with increased frequency accordĆ ing to Figure AĆ21...

Страница 195: ...ency Voltage RMS P850 600 V Figure AĆ20 ăMaximum NormalĆMode Voltage Versus Frequency Derating Curve Appendix E Specifications 222PS Operator Manual AĆ67 P400 1000 100 10 0 1 MHz 1 MHz 10 MHz Frequency Voltage RMS P850 600 V Figure AĆ20 ăMaximum NormalĆMode Voltage Versus Frequency Derating Curve ...

Страница 196: ... control extends the maximum sweep speed to 5 ns div Record Length 512 points 50 points per division Appendix E Specifications Appendices AĆ68 600 100 kHz 1 MHz 10 kHz 60 6 1 kHz DC 10 MHz Chassis Floating Chassis Grounded 30 V Frequency Voltage RMS Figure AĆ21 ăMaximum CommonĆMode Voltage Versus Frequency Derating Curve TableĂAĆ11 ăNominal TraitsĊHorizontal System Name Description Range SampleĆRa...

Страница 197: ...ty CRT filter shield has an antiĆreflectance surface to aid viewing in high ambient light conditions Appendix E Specifications 222PS Operator Manual AĆ69 TableĂAĆ12 ăNominal TraitsĊTriggering System Name Description External Trigger MaxiĆ mum Input Voltage1 Input to Common Input to Earth Ground Common to Earth Ground 42 V DC peak AC 1The external trigger input is not intended for floating measurem...

Страница 198: ...f a risĆ ing edge on DTR will turn instrument power on Maximum Input Voltage Any Pin 25 V DC peak AC Appendix E Specifications Appendices AĆ70 TableĂAĆ14 ăNominal TraitsĊPower System Name Description Internal Battery Type Sealed leadĆacid External Power Input Voltage Range Pin to Pin DC 12 to 28 VDC AC 16 to 20 V AC 47 Hz to 400 Hz External Power Input Voltage Range Either Pin to EXT TRIG COM or R...

Страница 199: ...procedure Performance Verification found in Appendix C appear in boldface type under the column Name Appendix E Specifications 222PS Operator Manual AĆ71 TableĂAĆ16 ăNominal TraitsĊMechanical Name Description Cooling Method Conduction through cabinet walls there are no cooling vents Construction Material Cabinet chassis parts constructed of plastic with the internal surface coated with conductive ...

Страница 200: ...e Response AberraĆ tions Low Frequency 3 maximum 0 15 divisions with a 5 diviĆ sion signal displayed Appendix E Specifications Appendices AĆ72 As stated above this subsection lists only warranted characteristics A list of typical characteristics starts on page AĆ76 Performance Conditions The electrical characteristics found in these tables of warranted charĆ acteristics apply when the scope has be...

Страница 201: ...ion settings faster than 0 5 ms div repetitive bandwidth is limited to 10 MHz by the input amplifier Appendix E Specifications 222PS Operator Manual AĆ73 TableĂAĆ17 ăWarranted CharacteristicsĊVertical System Cont Name Description Rise Time Useful for ReĆ petitive Signals or 35 ns whichever is greater SECńDIVĄ Setting 1 6 50 1Useful repetitive bandwidth is limited to the frequency at which 10 displ...

Страница 202: ...the secondsĆperĆdivision setting is 2 ms or faster but may flash when the setting is 10 ms or slower Appendix E Specifications Appendices AĆ74 TableĂAĆ18 ăWarranted CharacteristicsĊHorizontal System Name Description Accuracy Displayed X1 Accuracy Displayed X10 2 with X1 magnification 5 with X10 magnification TableĂAĆ19 ăWarranted CharacteristicsĊTriggering System Name Description Jitter Trigger 2 ...

Страница 203: ... connector housing for the RSĆ232 connections and detach the probes or store them in the probe pouch Appendix E Specifications 222PS Operator Manual AĆ75 TableĂAĆ20 ăWarranted CharacteristicsĊ ąąąEnvironmental Safety and Reliability Name Description Atmospherics Temperature 15 to 55_ C operating 30 to 70_ C nonĆoperating Relative humidity 0 to 95 5 0 operating to 55_ C nonĆoperating to 60_ C Altit...

Страница 204: ...ition CH 1 and CH 2 12 divisions minimum Range Variable VOLTS DIV Increases deflection factor by 250 Appendix E Specifications Appendices AĆ76 Typical Characteristics This subsection contains tables that lists the various typical characteristics that describe the 222PS PowerScout Typical characteristics are described in terms of typical or average performance Typical characteristics are not warran...

Страница 205: ...g Time Three hours at 25_ C Battery Capacity Over Operating Temperature 15_ C 80 25_ C 100 55_ C 110 Appendix E Specifications 222PS Operator Manual AĆ77 TableĂAĆ22 ăTypical CharacteristicsĊHorizontal System Name Description Accuracy Sample Rate 0 01 Position Control Range Either end of waveform can be positioned past the center vertical graticule line Display Sweep Length 10 24 divisions TableĂAĆ...

Страница 206: ... battery Consumption Maximum 15 watts or 16 VA maximum power demand occurs when charging the battery Appendix E Specifications Appendices AĆ78 TableĂAĆ24 ăTypical CharacteristicsĊPower System Cont Name Description Current Demand 1 A Max when charging battery Consumption Maximum 15 watts or 16 VA maximum power demand occurs when charging the battery ...

Страница 207: ...accessory kit 020Ć1752Ć00 10X probe with accessories two each P850 Industrial Lead Set 2 012Ć1392Ć00 222PS Operator Manual AĆ79 Appendix F Accessories This appendix provides a list of standard and optional accessories for the 222PS with Tektronix part numbers To order an accessory determine its part number and contact your local Tektronix field office or representative In the United States you can...

Страница 208: ...uch Viewing hood Spare battery Cigarette lighter adapter power cable Accessory kit data sheet BAT200 Appendix F Accessories Appendices AĆ80 Optional Accessories You can order the following accessories TableĂAĆ26 ăOptional Accessories Accessory Part Number 222PS PowerScout Service Manual 070Ć8098ĆXX Spare battery 146Ć0075Ć00 Accessory pouch for spare battery or external power AC adapter 016Ć0993Ć01...

Страница 209: ...nal power AC adapter ĊĊĊĊĊĊĊ Option A1 Ċ European 220ĂV 120Ć1826Ć00 Option A2 Ċ UK 240ĂV 120Ć1827Ć00 Appendix F Accessories 222PS Operator Manual AĆ81 Instrument Options You can order the following options for the 222PS PowerScout TableĂAĆ27 ăInstrument Options Description Part Number Option 05 Ċ instrument supplied with CAT200 VirtuĆ al Instrument Software CAT200 Option 04 Ċ instrument supplied w...

Страница 210: ...Appendix F Accessories Appendices AĆ82 Appendix F Accessories Appendices AĆ82 ...

Страница 211: ...Glossary Index Glossary Index ...

Страница 212: ......

Страница 213: ...pends on the signals applied to channels 1 and 2 speedĆ ing the process of setting up the instrument 222PS Operator Manual GĆ1 Glossary AC Coupling A means to block the DC component of an input signal and to display only its AC component Acquisition Mode A manner of acquiring the signal and constructing a waveform The 222PS has four acquisition modes normal averaging envelope and continuous envelo...

Страница 214: ...esistance Display Sample Interval The time interval between two points of the waveform on the screen Glossary Glossary GĆ2 Averaging Acquisition Mode An acquisition mode in which the instrument displays a waveform that is the pointĆbyĆpoint average of the last four waveforms acquired Baud Rate The rate at which two connected electronic devices exchange data Brightness The intensity with which the ...

Страница 215: ...action such as placing the instrument in a specific mode or enabling or disabling a specific feature Glossary 222PS Operator Manual GĆ3 Envelope Acquisition Mode An acquisition mode in which the instrument displays the positive and negative peak values of the signal An enveloped waveform shows the maximum and minimum variations in the signal EquivalentĆTime TimeĆBase Mode The timeĆbase mode requir...

Страница 216: ...de used for most time bases When a trigger occurs a record of the waveform is acquired and displayed Glossary Glossary GĆ4 Menu Button One of four buttons alongside the right edge of the screen that can be associated with a menu item Pressing a menu button performs the action associated with the item next to it Menu Item One of four action choices printed at the right edge of the screen alongside ...

Страница 217: ...number of seconds or fractions of a second represented by each major division on the horizontal axis Glossary 222PS Operator Manual GĆ5 RSĆ232 A communication interface that can be used to control the instruĆ ment and capture data remotely from a computer Sample One point of the waveform Waveforms on the 222PS are made up of 512 samples Sample Interval See acquisition sample interval or display sa...

Страница 218: ...ode Possible timeĆbase modes are record equivalentĆtime scroll and scrollĆscan See those definitions Glossary Glossary GĆ6 Selected Channel The channel affected by changes to the frontĆpanel controls The readout associated with a selected channel appears boxed on the 222PS display SelfĆCalibration A procedure which fineĆtunes a system for increased accuracy The 222PS provides selfĆcalibration rout...

Страница 219: ...ns However after this manipulation the exact number of voltsĆperĆdivision for that signal is unknown Glossary 222PS Operator Manual GĆ7 TimeĆOut Feature A feature that shuts off the instrument after two minutes without changes to the controls when the instrument is running under battery power This feature prevents the battery from being discharged when the instrument is left unattended Trigger The...

Страница 220: ... the x horizontal axis and the signal acquired through channel 2 is displayed on the y vertical axis Glossary Glossary GĆ8 Vertical Axis The axis along which an oscilloscope measures the voltage of a signal in volts per division or fractions of a volt per division Volt V The unit of potential difference One volt is the amount of voltage needed to cause one ampere of current to pass through one Ohm...

Страница 221: ...ecting 2Ć13 3Ć35ć3Ć36 deep discharge of 3Ć40ć3Ć41 low charge indicator 3Ć37 operating with 3Ć35ć3Ć41 222PS Operator Manual IĆ1 Index Symbols sign readout 2Ć9 trigger slope 3Ć69 sign readout 2Ć9 trigger slope 3Ć69 sign readout 2Ć7 sign readout 2Ć7 3Ć76 sign readout 2Ć7 A AC coupling 3Ć19 definition GĆ1 readout 2Ć7 accessories ordering AĆ79 accessory pouch AĆ80 ACQ AĆ17 ACQ button 2Ć11 3Ć3ć3Ć4 acqui...

Страница 222: ...8 coupling menu 3Ć18 CTS AĆ32 CURV AĆ14 AĆ19 CURV AĆ18 cycle definition GĆ2 D DAC AĆ16 AĆ19 DAC AĆ18 Index Index IĆ2 recharging after deep discharge 3Ć40ć3Ć41 replacing 3Ć39 spare AĆ80 time out feature and 3Ć37 battery power slow time bases with 3Ć26 baud rate definition GĆ2 setting 2Ć12 AĆ11ćAĆ36 baud rates AĆ32 BNCĆfemaleĆtoĆdualĆbanana adaptĆ er AĆ80 BNCĆmaleĆtoĆdualĆbanana adapter AĆ80 brightn...

Страница 223: ...3Ć2 G glitch detecting 3Ć2 ground coupling 3Ć19 definition GĆ3 readout 2Ć7 ground symbol readout 2Ć7 Index 222PS Operator Manual IĆ3 DANGER statement on equipment 1Ć3 data bits AĆ32 DC coupling 3Ć19 definition GĆ2 readout 2Ć7 decoding acquisition mode settings AĆ26 miscellaneous AĆ26 SEC DIV setting AĆ22 trigger functions AĆ24 vertical settings AĆ20 deflection definition GĆ2 DISPL button 2Ć12 3Ć21...

Страница 224: ...obe 3Ć46 selfĆcalibration 3Ć11 trigger mode 3Ć73ć3Ć74 trigger position 3Ć71 trigger source 3Ć64ć3Ć65 Index Index IĆ4 H horizontal axis definition GĆ3 horizontal controls 2Ć5 3Ć25 horizontal position knob 2Ć6 of magnified signal 3Ć25 of stored waveforms 3Ć25 horizontal scale with AUTO SETUP 3Ć6 I ID AĆ19 ID AĆ18 INIT button 3Ć2 3Ć15 3Ć16 3Ć61 3Ć73 instrument accessories for AĆ79 calibration 3Ć9ć3Ć1...

Страница 225: ...80 menu 3Ć46 storing 2Ć13 R RCL button 2Ć11 3Ć53 readout sign 3Ć76 clearing 3Ć21ć3Ć22 definition GĆ4 Index 222PS Operator Manual IĆ5 messages AĆ33 minor division definition GĆ4 MODE button 2Ć4 3Ć73 modem activating 2Ć12 motor trigger 3Ć67 N nominal traits defined AĆ65 listed AĆ65 AĆ68 normal acquisition mode 3Ć1 definition GĆ4 normal trigger mode 3Ć28 definition GĆ4 O ON button 3Ć37 3Ć42 operator ...

Страница 226: ...27ć3Ć28 definition GĆ5 fast settings of 3Ć27 knob 2Ć5 readout 2Ć9 setting 3Ć26 slow settings of 3Ć27 Index Index IĆ6 displaying 3Ć21ć3Ć22 magnified signal 3Ć29 saved waveform 3Ć52ć3Ć54 store mode 3Ć61 stored waveform 2Ć8 trigger level 3Ć69 turning off 2Ć12 vertical 2Ć6 2Ć8 READY AĆ19 rear panel 2Ć14 recalling a setup button 2Ć12 recalling a stored waveform button 2Ć11 record timeĆbase mode 3Ć27 de...

Страница 227: ...Ć16 definition GĆ6 equivalentĆtime 3Ć27 record 3Ć27 scroll 3Ć27ć3Ć28 scrollĆscan 3Ć28 top panel 2Ć11 Index 222PS Operator Manual IĆ7 stored waveform 2Ć8 selected channel definition GĆ6 selecting an acquisition mode 3Ć3ć3Ć4 self cal tests AĆ39ćAĆ41 selfĆcalibration how to perform 3Ć9ć3Ć12 menu 3Ć11 when to perform 3Ć9 serial number 2Ć14 3Ć31 service manual AĆ80 servicing 3Ć13 3Ć31 setĆup 3Ć5ć3Ć8 se...

Страница 228: ...AĆ32 typical characteristics defined AĆ76 listed AĆ76 U uncalibrated channel 2Ć8 3Ć76 definition GĆ7 Index Index IĆ8 transfer options AĆ30 via cable AĆ30 via modem AĆ30 TRG AĆ19 TRG AĆ18 TRIG COM connector 2Ć15 3Ć66 TRIG POS button 2Ć12 3Ć71 trigger controls 2Ć4 3Ć63 coupling 3Ć69 definition GĆ7 definition GĆ7 external probe AĆ80 external source 2Ć15 level 2Ć5 3Ć15 and probe configuration 3Ć45 def...

Страница 229: ...Ć80 horizontal positioning in 3Ć80 magnified displays and 3Ć29 positioning waveforms 3Ć80 using 3Ć79 Index 222PS Operator Manual IĆ9 user messages AĆ33 V version number firmware 3Ć31 identifying 3Ć31ć3Ć33 vertical axis definition GĆ8 vertical controls 2Ć3 3Ć75 vertical position and trigger source 3Ć76 vertical scale with AUTO SETUP 3Ć6 virtual instrument software package AĆ11 AĆ80 volt definition ...

Страница 230: ...Index Index IĆ10 Index Index IĆ10 ...

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