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Tektronix 222PS Operator's Manual

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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

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Summary of Contents for Tektronix 222PS

  • Page 1 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...
  • Page 2 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 to each instrument.
  • Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
  • Page 4 Certificate of the Manufacturer/Importer 222PS PowerScout POWER We hereby certify that the SYSTEMS OSCILLOSCOPE AND ALL INSTALLED OPTIONS complies with the RF Interference Suppression requirements of Amtsbl. Vfg 1046/1984. The German Postal Service was notified that the equipment is being marketed.
  • Page 5 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 eingesetzt wird, muß...
  • Page 7 Overview describes the 222PS PowerScout and provides safety information. At A Glance describes the controls and connectors for the 222PS. In Detail provides further detail on some aspects of the 222PS, building on the information contained in At A Glance. The 15...
  • Page 8 222PS. Glossary defines various words used in the text. The Index helps you locate information quickly. NOTE If you have never used an oscilloscope before, please read the tutorial in Appendix A before using the 222PS. Welcome...

  • Page 9: Table Of Contents

    ......... . xiii Overview About the 222PS PowerScout ..... . Safety .
  • Page 10 Envelope Acquisition Mode ..... . Continuous Envelope Acquisition Mode ... Selecting an Acquisition Mode .
  • Page 11 ........3 72 222PS Operator Manual...
  • Page 12 Single Sequence ....... 3 73 Setting the Trigger Mode ......3 73 Vertical Operation .
  • Page 13 ....... . A 81 External Power AC Adapter Options ....A 81 222PS Operator Manual...
  • Page 14 Glossary & Index Glossary ..........Index .

  • Page 15: List Of Illustrations

    ......2 11 Figure 2 10: Side of 222PS, Storage Pouch Removed ..

  • Page 16: Figure 2 3: Trigger Controls

    Figure A 6: RS 232 Communications Port ....A 10 Figure A 7: Communication Between the 222PS and a PC A 10 Figure A 8: The Auxiliary Functions Menu .
  • Page 17 Figure A 21: Maximum Common Mode Voltage Versus Frequency Derating Curve ....... A 68 222PS Operator Manual...
  • Page 18 Contents...

  • Page 19: List Of Tables

    Table A 6: Acquisition Mode and Misc. Settings ... . A 27 Table A 7: 222PS Interconnect Pin Assignments ... A 34 Table A 8: Test Equipment .
  • Page 20 Table A 27: Instrument Options ......A 81 Table A 28: External Power AC Adapter Options .

  • Page 21: Overview

    Overview...

  • Page 23: About The 222Ps Powerscout

    If you need more information about your Tektronix 222PS PowerScout or other Tektronix products, contact the nearest Tektronix sales office or distributor, consult the Tektronix product catalog, or, in the U. S., call the Tektronix National Marketing Center toll free at 1 800 426 2200.

  • Page 24: Safety

    Overview 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.

  • Page 25: Specific Precautions

    Specific Precautions Observe all these precautions to ensure your personal safety and to prevent damage either to the 222PS or to equipment connected to it. Power Source The 222PS can use its self contained sealed lead acid battery as a power source. It can also operate using power supplied to the external power input.
  • Page 26 Do not operate the 222PS in an atmosphere of explosive gasses. Electric Overload Never apply a voltage to a probe or connector on the 222PS that is outside the range specified for that probe or connector. Overview...

  • Page 27: At A Glance

    At a Glance...
  • Page 29 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 chapter entitled In Detail.

  • Page 30: Front Panel Controls

    At a Glance Front Panel Controls The front panel for the 222PS PowerScout appears as shown in Figure 2 1. Figure 2 1: 222PS Front Panel The display area includes the screen and associated buttons. The screen shows signal traces, readouts, and menu items. Buttons along the side of the screen allow you to manipulate menus.

  • Page 31: Vertical Controls

    The inner knob sets the vertical position of the signal. Turn the knob clockwise to move the signal towards the top of the screen and counterclockwise to move the signal towards the bottom of the screen. For more information on setting the vertical position see page 3 77. 222PS Operator Manual...

  • Page 32: Trigger Controls

    For more information on channels, see page 3 17. Trigger Controls The trigger controls are on the front panel of the 222PS PowerScout. They appear as shown in Figure 2 3. Figure 2 3: Trigger Controls When you push the button labeled SLOPE, you toggle between a positive and negative trigger slope.

  • Page 33: Horizontal Controls

    For more information on the trigger level see page 3 70. Horizontal Controls The horizontal controls are on the front panel of the 222PS PowerSc out. They appear as shown in Figure 2 4. Figure 2 4: Horizontal Controls The outer knob sets the seconds per division.

  • Page 34: The Display

    Readouts are numeric or symbolic information associated with a signal. The 222PS displays readouts at three places on the screen: along the top, along the bottom, and slightly above the bottom. Readouts along the top show information associated with the vertical controls.

  • Page 35: Figure 2 5: Vertical Readouts

    NOTE If either channel is off, the volts per division number is replaced by an OFF. The downward pointing arrow indicates that the channel is inverted. For more information on inverting a channel, see page 3 22. 222PS Operator Manual...

  • Page 36: Figure 2 6: Saved Waveform Readouts

    At a Glance Saved Waveform Readouts Figure 2 6 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 3 51..

  • Page 37: Menus And Menu Buttons

    XY mode or turning off the time out feature. A number of buttons on the front and top panels of the 222PS invoke menus when pressed. When a menu is on the display, you can select one of its items to perform an action.

  • Page 38: Figure 2 8: Parts Of A Menu

    At a Glance NAME: CHOICE 1 CHOICE 2 CHOICE 3 CHOICE 4 Figure 2 8: Parts of a Menu The button labeled CLEAR erases the menu from the display. The menu buttons are next to the screen, along its right edge. Pressing the button next to a menu item performs the action represented by that item.

  • Page 39: Top Panel Controls

    At a Glance Top Panel Controls The top panel for the 222PS PowerScout appears as shown in Fig ure 2 9. Figure 2 9: 222PS Top Panel Pressing this button invokes a menu that allows you to recall saved waveforms. See page 3 53.
  • Page 40 For more information about setting the baud rate or activating the modem, see page A 11. For more information about configuring the 222PS for the correct probes, see page 3 45. You can enable or disable MOTOR TRIG, which places a...

  • Page 41: Side Connectors

    At a Glance Side Connectors The right side of the 222PS PowerScout appears as shown in Fig ure 2 10. Figure 2 10: Side of 222PS, Storage Pouch Removed This is the probe connector for channel 1. This is the probe connector for channel 2.

  • Page 42: Rear Panel Controls And Connectors

    At a Glance Rear Panel Controls and Connectors The rear panel for the 222PS PowerScout appears as shown in Fig ure 2 11. Figure 2 11: 222PS Rear Panel This panel points to the probe inputs on the instrument's side and indicates the 222PS maximum input voltage rating.
  • Page 43 At a Glance This knob varies the brightness of the 222PS screen. See page 3 23 for more information on screen brightness. This is the external trigger common reference connector. To use a grounded reference with your external trigger source, connect the reference signal here.

  • Page 44: The Tilt Stand

    At a Glance The Tilt Stand The 222PS PowerScout comes with a tilt stand so that you can view the front panel 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 it.

  • Page 45: In Detail

    In Detail...

  • Page 47: Acquisition Modes

    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.

  • Page 48: Envelope Acquisition Mode

    Acquisition Modes 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 functions only for time base settings between 20 ms and 20 s per division.

  • Page 49: Selecting An Acquisition Mode

    Step 2: Press the button next to the acquisition mode you wish to select. The acquisition mode takes effect, and the menu disap pears. ACQ: NORM CONT ENV Figure 3 2: The Acquisition Menu 222PS Operator Manual...
  • Page 50 Acquisition Modes In Detail...

  • Page 51: Auto Setup

    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 3 55).

  • Page 52: 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.

  • Page 53: Table 3 1: Auto Setup Settings

    Trigger position Post Trigger slope Plus Trigger level Midpoint of signal X10 MAG Readouts Selected channel Channel 1 if signal exists, or if channel 2 has no signal NOTE AUTO SETUP does not disable the motor trigger selection. 222PS Operator Manual...
  • Page 54 Auto Setup In Detail...

  • Page 55: Calibration

    Calibration The 222PS has a vertical channel self calibration routine to maintain best balance and accuracy with temperature variations. Running the Self Calibration Routine To achieve the specified performance, you should recalibrate the 222PS any time the ambient temperature has changed by more than 5°...

  • Page 56: Figure 3 3: The Auxiliary Functions Menu

    Calibration AUX: ALIGN SELF CAL CONFIG MOTOR TRIG Figure 3 3: The Auxiliary Functions Menu Step 3: Press the menu button next to the SELF CAL menu item to access the calibration menu. The display now appears as shown in Figure 3 4. SELF CAL: EXT TRIG PROBE...
  • Page 57 Step 6: Now recalibrate the external trigger input. Before you start the calibration, connect the external trigger input connector to the trigger common reference connector on the rear panel. Use a jumper cable with a banana plug connector on each end. 3 11 222PS Operator Manual...

  • Page 58: Figure 3 5: The Ground External Trigger Calibration Menu

    Calibration NOTE To calibrate the external trigger input, the TRIG COM connector must be connected to the EXT TRIG INPUT connector. Step 7: Invoke the menu again, and press the menu button next to EXT TRIG. A new menu appears on the display, as shown in Figure 3 5.
  • Page 59 Step 8: Press the menu button next to CAL to begin the calibra tion. Follow the procedure outlined in Step 4. Step 9: When you are done, press the CLEAR button above the menu buttons to return the instrument to normal operation. 3 13 222PS Operator Manual...
  • Page 60 Calibration 3 14 In Detail...

  • Page 61: Capturing Random Events

    Capturing Random Events Capturing random electric events in circuits is difficult and time con suming. You can use the 222PS's single sequence mode to make the task easier. Single sequence mode is one of four trigger modes you can use with the 222PS.
  • Page 62 Initialize the single sequence function and let the oscilloscope watch for the event. The 222PS acquires data continuously up to the trigger point. When the trigger event occurs, the instrument acquires the data it needs to fill the rest of the display.

  • Page 63: Channels

    Channels The 222PS has two fully isolated input channels with which you can make floating measurements. With signals of up to 600 VAC input, you can make measurements as you would with a volt meter. This section explains how to select a channel, display the signal it acquires, and choose the right channel coupling.

  • Page 64: Displaying A Channel

    Channels 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"...

  • Page 65: Setting Channel Coupling

    AC coupling. If the type of coupling you wish already appears boxed, it is already the selected coupling. Press the CLEAR button to remove the menu from the display. 3 19 222PS Operator Manual...
  • Page 66 Channels 3 20 In Detail...

  • Page 67: The Display

    Displaying and Clearing the Readouts Unless you explicitly turn off the readouts, the 222PS displays them. If you wish to turn the readouts off and view only the signals, follow these steps.

  • Page 68: Inverting The Display

    The Display Step 2: Press the menu button next to the bottom menu item RO OFF. The menu disappears and the screen displays only the signal. Step 3: If you wish to turn the readouts back on again, repeat the above procedure.

  • Page 69: Varying The Brightness

    Use the intensity control on the back panel (labeled INTEN) to adjust the display's brightness. To change the brightness, insert a small screwdriver into the center slot of the knob and rotate the knob until the display appears as you wish. 3 23 222PS Operator Manual...
  • Page 70 The Display 3 24 In Detail...

  • Page 71: Horizontal Operation

    3 29. The horizontal position control affects the position of a saved wave form. The 222PS displays a saved waveform at the horizontal position presently in effect, not the horizontal position at which it was saved.

  • Page 72: Seconds Per Division

    Horizontal Operation Seconds per Division The 222PS can display a signal with a range of 20 s to 50 ns. If magni fication is on, the instrument's range is 2 s to 5 ns. This means that the 222PS can display a waveform that represents as long a period as 200 seconds or as short a period as 50 ns (in the latter case, with magnification on).

  • Page 73: Time Base Mode

    Record For most seconds per division settings, the instrument uses the time base 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. Equivalent time...

  • Page 74: Table 3 2: Time Base Modes

    Horizontal Operation The instrument uses scroll mode for slow time bases when either auto level or auto baseline trigger mode is in effect. The instrument uses scroll scan mode for slow time bases when normal or single sequence trigger mode is in effect. Averaging and continuous envelope acquisition modes acquire several records of data before displaying a waveform.

  • Page 75: Magnifying The Signal

    Displays in XY mode cannot be magnified. When you magnify displays in scroll and scroll scan time base modes, they update only after the instrument completely acquires the wave form. To turn off magnification, push the horizontal POS knob again. 3 29 222PS Operator Manual...
  • Page 76 Horizontal Operation 3 30 In Detail...

  • Page 77: Maintenance

    Maintenance The 222PS is covered by a standard Tektronix three year 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 out of warranty repairs, call 1 800 TEK WIDE (1 800 835 9433).

  • Page 78: Figure 3 12: The Auxiliary Functions Menu

    Maintenance AUX: ALIGN SELF CAL CONFIG MOTOR TRIG Figure 3 12: The Auxiliary Functions Menu Step 2: Press the menu button next to ALIGN. This calls up the XY Alignment Menu as shown in figure 3 13. ALIGN: IDENT Figure 3 13: XY Alignment Menu Step 3: Press the menu button next to IDENT.

  • Page 79: Repackaging For Shipment

    Maintenance TEK 222PS VER: x.xx Figure 3 14: The 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:...
  • Page 80 Maintenance Cushion the instrument on all sides with three inches of padding material or urethane foam, tightly packed between the carton and the instrument. Seal the shipping carton with an industrial stapler or strapping tape. Call 1 800 TEK WIDE (1 800 835 9433) for shipping instructions. 3 34 In Detail...

  • Page 81: Power

    Power You can operate the 222PS by using the internal battery or by plug 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 use when portable operation is convenient.

  • Page 82: Figure 3 15: Side View Without Battery Cover

    Power Step 2: Open the probe pouch and disconnect the probes. Step 3: Slide the battery compartment cover and probe pouch toward the rear of the instrument to unlock the locking tabs. Step 4: Lift the battery compartment cover and remove it. The instrument now appears as shown in Figure 3 15.

  • Page 83: Charging The Battery

    An automatic time out feature prevents the battery from losing power when the instrument is unattended for a long period. When you enable the time out feature, the 222PS turns itself off after two minutes of operating under battery power with no changes to the controls.

  • Page 84: Figure 3 16: The Auxiliary Functions Menu

    Power You can disable the time out feature so that the instrument stays on for the life of the battery's charger. You can also enable the time out feature again when you wish. To do so, follow these steps. Step 1: Press the AUX FUNCT button on the top panel to display the auxiliary functions menu.

  • Page 85: Replacing The Battery

    NOTE Because the 222PS loses saved data after 30 s without power, have the spare battery handy before beginning this procedure. To replace the battery, follow these steps: Step 1: Open the battery compartment.

  • Page 86: Storing The Instrument

    Power 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 1 mA. With the battery in place, waveform settings and front panel setups remain in memory;...

  • Page 87: External Power Operation

    External Power Operation The 222PS has an external power input connector so that it need not use the battery power. You can connect the 222PS to a wall socket using the External Power AC Adapter or you can use your own exter nal power source.

  • Page 88: Other Sources Of External Power

    Other Sources of External Power You can operate the 222PS from your own external power source. The power source must supply at least 15 W or 16 volt amperes. An AC power source must provide 16-20 VAC at 47-400 Hz.

  • Page 89: Probes

    The optional P400 1X probe limits the maximum deflection factor of the 222PS to 50 volts per division. It decreases the probe tip input imped ance to 1 MW and is sufficient for minimal loading of sensitive circuits. The P400 probe also limits input frequency to 20 MHz.

  • Page 90: Connecting The Probes

    Probes 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 con nectors.

  • Page 91: Configuring The Probes

    Probes Configuring the Probes To ensure that the 222PS is operating with the correct settings, confi gure the instrument to match the probes you are using. To set the probe configuration, follow these steps. Step 1: Press the AUX FUNCT button on the top panel to display the auxiliary functions menu, as shown in Figure 3 19.
  • Page 92 Probes CONFIG: TIME OUT BAUD MODEM ON PROBE Figure 3 20: The Configuration Menu Step 3: Press the menu button next to the PROBE menu item to access the probe menu, as shown in Figure 3 21. PROBE: CH 1 1X CH 1 10X CH 2 1X CH 2 10X...

  • Page 93: Probe Accessories

    If the current probe settings are appropriate, you need not press any buttons. Step 5: After you have configured the 222PS for the correct probes, press the CLEAR button to remove the menu from the display.
  • Page 94 Probes Probe Figure 3 22: Probe and Accessories 3 48 In Detail...
  • Page 95 WARNING To avoid personal injury or damage to the 222PS or the probes, do not apply more than 850 V peak between probe tip and earth ground, between probe tip and probe common, or between probe common and earth ground.
  • Page 96 Probes 3 50 In Detail...

  • Page 97: Saving And Recalling Data

    Waveforms A saved waveform is a record of a single acquisition cycle. Think of it as a snapshot of a waveform. The 222PS lets you save up to four waveforms in memory. It can recall these at any time. Saving a Waveform Use these steps to save a waveform.
  • Page 98 NOTE You can save only one waveform to each memory location; the 222PS can store only four waveforms. If you choose a memory location that already holds a waveform, the instrument replaces it with the one you are presently saving.

  • Page 99: Recalling A Saved Waveform

    X10 magnification, or autolevel. Step 7: After clearing the menu, the 222PS continues to display the saved trace and its readout. To clear them, press the button labeled CLEAR again.
  • Page 100 Step 2: Press 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, with the same parameters in effect. The instrument also displays readouts of these parameters at the bottom of the screen.

  • Page 101: Setups

    Saving and Recalling Data Setups The 222PS can save four setups in its memory. If you often use the same front panel 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 item.
  • Page 102 Saving and Recalling Data SET UP: SAVE RECALL ERASE ERASE ALL Figure 3 26: The Setup Menu Step 3: Press the button next to the menu item SAVE. A new menu appears, as shown in Figure 3 27. SAVE SETUP: Figure 3 27: The Save Setup Menu Step 4: Choose the memory location to which you wish to save the setup.

  • Page 103: Recalling A Saved Setup

    Saving and Recalling Data 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 3 27, the memory location already contains a setup.

  • Page 104: Erasing A Saved Setup

    Saving and Recalling Data Step 3: Memory 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 repre senting the memory location. The menu clears and the settings change to the saved values.
  • Page 105 Press the button next to the number representing the memory location. The menu clears and the instrument erases the setup in that memory location. NOTE If you choose a memory location without a setup in it, the instrument beeps and the menu remains. 3 59 222PS Operator Manual...
  • Page 106 Saving and Recalling Data 3 60 In Detail...

  • Page 107: Store Mode

    INIT button to reacquire the signal. You can tell whether the instrument is in store or nonstore mode by looking at the bottom readouts. When the 222PS is in store mode, an symbol appears in the middle of the bottom readout. In nonstore mode, this space is blank.
  • Page 108 Store Mode 3 62 In Detail...

  • Page 109: Triggering

    The Trigger Light When the 222PS is triggered, the TRIG'D LED lights. NOTE If the amplitude of your signal is less than 1/2 division, the instrument may not trigger. Readjust the volts per division setting so that your display amplitude is larger.

  • Page 110: Trigger Source

    Triggering 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.

  • Page 111: External Triggering

    External Triggering The 222PS has the ability to trigger on an external signal, such as a clock pulse. The instrument acquires external trigger signals through the external trigger input and trigger common reference connectors on the rear panel.
  • Page 112 Triggering WARNING To avoid personal injury or damage to the 222PS or equipment connected to it, do not float the external trigger common connector, the RS 232 communications port, or the external power input above 42 V peak. These inputs are not electrically isolated from each other.

  • Page 113: Motor Trigger Function

    To trigger on 50/60 Hz line signals, toggle MOTOR TRIG on and set the other trigger controls to trigger either on the rising edge or the falling edge of the waveform. The motor trigger function suppresses stray trigger signals that result from line transients and noise. 3 67 222PS Operator Manual...
  • Page 114 Triggering Figure 3 34: Motor Drive Signals Separated by a Low Region Figure 3 35: Motor Drive Signals Separated by a High Region 3 68 In Detail...

  • Page 115: Trigger Coupling

    Triggering 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 DC coupled. Trigger Slope To determine the trigger slope presently in use, look at the bottom readouts.

  • Page 116: Auto Level

    You can also set the 222PS to perform a new auto level search each time the trigger is lost. To do so, see the section on trigger modes on page 3 71.

  • Page 117: Trigger Modes

    You can also cycle through the choices by pressing TRIG POS repeatedly until the selection you want appears boxed. Then press CLEAR. Trigger Modes The 222PS has four trigger modes: normal, auto level, auto baseline, and single sequence. 3 71 222PS Operator Manual...

  • Page 118: Normal

    Triggering 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.

  • Page 119: Single Sequence

    Step 1: Press the button labeled MODE to the right of the trigger control area on the front panel. A menu appears, as shown in Figure 3 37. The trigger mode presently in effect appears boxed in the menu. 3 73 222PS Operator Manual...
  • Page 120 Triggering TRIG MODE: NORM AUTOLVL AUTOBL SSEQ Figure 3 37: The Trigger Mode Menu Step 2: Press 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.

  • Page 121: Vertical Operation

    Changes you make to a signal from a channel that is off take effect as soon as you turn the channel back on. Vertical Positioning To position the selected channel signal vertically, turn the inner knob labeled POS. 3 75 222PS Operator Manual...

  • Page 122: Volts Per Division

    Volts per Division The vertical axis of the 222PS display has eight divisions. The 222PS can display a signal with a range of 50 mV to 500 V per division. (If you are using 1X probes, the range is 5 mV to 50 V per division.) A wave form as large as 850 V peak to peak can fit entirely on the display.
  • Page 123 Step 4: Hold the knob in while turning it clockwise slowly until you hear a beep. The uncalibrated symbol disappears from the readouts and you can now accurately determine the volts per division for the signal. 3 77 222PS Operator Manual...
  • Page 124 Vertical Operation 3 78 In Detail...

  • Page 125: Xy Mode

    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 seconds per division settings affect the XY display. We recommend that before entering XY mode you set up your signals as you require.

  • Page 126: Positioning Xy Waveforms

    XY menu item appears boxed to indicate that XY mode is se lected. Step 4: Press the button next to the menu item XY again to take the instrument out of XY mode. The 222PS clears the menu and displays the signals against a horizontal time base. Positioning XY Waveforms...

  • Page 127: Appendices

    Appendices...

  • Page 129: Appendix A: Tutorial

    The 222PS provides a variety of aids to help you determine the exact size and location of your signal on the screen. You can read the volts per division and seconds per division scale factors directly from the on screen readouts.

  • Page 130: Measuring Voltage

    Appendix A: Tutorial 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 rise and fall time measurements, as explained on page A 7. Figure A 1 illustrates these markings. .

  • Page 131: Measuring Peak To Peak Voltages

    For example, Figure A 2 shows a sine wave that is five major divisions high. As the readout at the top left indicates, the vertical scale factor is 0.2 volts per division. Therefore, the peak to peak voltage of the sine wave is 5 0.2, or 1 volt. 222PS Operator Manual...

  • Page 132: Using A Ground Reference Point

    Appendix A: Tutorial NOTE The volts per division scale factor always refers to major divisions. A minor division is one fifth 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.

  • Page 133: Measuring Time

    The scale factors in effect when you recall the waveform are unrelated to it. To measure the time a signal represents, use the following procedure. 222PS Operator Manual...
  • Page 134 Appendix A: Tutorial Step 1: Position the waveform so that its center crosses the vertical center of the screen, as shown in Figure A 4. Use the horizontal center line to help you. Step 2: Count the horizontal major and minor divisions occupied by one complete period of the waveform from the time it crosses the center line in the positive direction until it again...

  • Page 135: Measuring Rise Or Fall Time

    For example, for the signal in Figure A 5, the horizontal distance between the 10% signal crossover point and the 90% crossover point is about nine tenths of a division. Multiplying 0.9 by a horizontal scale factor of 50 ns gives us a rise time of 45 ns. 222PS Operator Manual...
  • Page 136 Appendix A: Tutorial > .5V ........

  • Page 137: Appendix B: Remote Communication

    Introductory Information You can connect the 222PS to a PC using the RS 232 communications port located on the rear panel, as shown in Figure A 6. 222PS Operator Manual...
  • Page 138 You can connect the 222PS to a PC directly, using the optional acces 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 modems that can communicate over a telephone line. Fig ure A 7 illustrates both these possible arrangements.

  • Page 139: Setting The Baud Rate

    The 222PS gives you the choice of four baud rates: 9600, 2400, 1200, or 300. Determine the appropriate baud rate by checking the baud rate of your modems.
  • Page 140 Appendix B: Remote Communication Step 2: Press the menu button next to the menu item CONFIG to access the configuration menu, as shown in Figure A 9. CONFIG: TIME OUT BAUD MODEM ON PROBE Figure A 9: The Configuration Menu Step 3: Press the menu button next to the menu item BAUD.

  • Page 141: Command Formats

    Commands, Queries, and Responses Figure A 11 shows the set of commands and queries sent to the instrument and the responses sent by the instrument. Explanation for each is given in the following text. A 13 222PS Operator Manual...
  • Page 142 Commands The 222PS Digital Oscilloscope RS 232 interface supports these commands. CURV <frame>: <wfrm data>; This command loads waveform data into the specified 222PS reference memory (REF1-REF4). The waveform data must be sent as hex encoded ASCII characters. NOTE Waveforms may be written back to channel 1 and channel 2, but the next acquisitions into those memories will overwrite any previously saved waveforms.

  • Page 143: Table A 1: But Button Codes

    Appendix B: Remote Communication <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.
  • Page 144 Appendix B: Remote Communication Table A 1: BUT Button Codes (Cont.) Code Simulated Button Press Menu Item 2 Menu Item 3 Trigger SOURCE Trigger MODE Trigger SLOPE CH 2 Select Ch1 Select AUTO SETUP Front Panel Setup Menu Trigger Position Menu Auxiliary Function Menu Display Mode Menu Save Waveform Menu...

  • Page 145: Table A 2: Dac Code And Value Data

    See Tables A 3 through A 6 to encode and decode <fpdata>. NOTE REF1-REF4 front panel volts can be affected by the selected probe configuration in the 222PS instrument (see Front Panel Encoding section). A 17 222PS Operator Manual...
  • Page 146 Appendix B: Remote Communication Queries The 222PS Digital Storage Oscilloscope RS 232 interface supports the following queries: CURV? <frame>; This query requests waveform data. The instrument sends wave form data as hex encoded ASCII characters. <frame> is one of six possible sources for curve data (CH1, CH2, REF1, REF2, REF3, or REF4).
  • Page 147 This response is in the same form as the FP command. The byte decoding (by bit) for the front panel settings is given in Tables A 3 through A 6; each table shows the decoding for one of the hexa decimal bytes. A 19 222PS Operator Manual...

  • Page 148: Front Panel Encoding

    NOTE REF1 through REF4 front panel volts can be affected by probe configuration in the 222PS (see the Front Panel Encoding section). Front Panel Encoding Tables A 3 through A 6 show how the ten ASCII characters of the logical front panel hexadecimal bytes are encoded.

  • Page 149: Table A 3: Channel Settings

    3 2 1 0 20 mV 50 mV 0.1 V 0.2 V 0.5 V 10 V 20 V 50 V 100 V 200 V Available for recalled waveforms only. BITS CLPG CH OFF CAL'd UNCAL'd INVERT A 21 222PS Operator Manual...

  • Page 150: Sec/Div Setting

    Appendix B: Remote Communication 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 A 4 that the bits of character 5 define several settings of the front panel.

  • Page 151: Table A 4: Seconds Per Division And Misc. Settings

    2 1 0 SEC/DIV BITS VALUE 50 ns 0.1 ms 0.2 ms 0.5 ms 1 ms 2 ms 5 ms 10 ms 20 ms 50 ms 0.1 s 0.2 s 0.5 s 10 s 20 s A 23 222PS Operator Manual...

  • Page 152: Trigger Positions, Slope, Source, And Mode Settings A

    Appendix B: Remote Communication Trigger Positions, Slope, Source, and Mode Settings Characters 7 and 8 of the front panel 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 character 7 and bit 1 of character 8).
  • Page 153 Table A 5: Trigger Position, Slope, Source, and Mode Settings CHAR 7 CHAR 8 BYTE 4 2 1 0 BITS TRIG MODE NORM AUTO LVL AUTOBL SSEQ BITS TRIG VERT CH 1 CH 2 TRIG SLOPE BITS TRIG POST A 25 222PS Operator Manual...

  • Page 154: Acquisition Mode And Miscellaneous Settings

    Appendix B: Remote Communication Acquisition Mode and Miscellaneous Settings Characters 9 and 10 of the front panel setup string define the remain ing settings not defined by the other 8 characters. Table A 6 shows setup state controlled by each bit. The only two bit setting is for Acquisition MODE.

  • Page 155: Table A 6: Acquisition Mode And Misc. Settings

    Table A 6: Acquisition Mode and Misc. Settings AUTO TRIG CHAR 9 CHAR 10 ENABLED BYTE 5 2 1 0 STORE MODE NONSTORE STORE BITS MODE NORM C ENV VALID STORE BIT RCL'D BIT CHAN TIME A 27 222PS Operator Manual...

  • Page 156: Rs 232 Error Codes

    Appendix B: Remote Communication RS 232 Error Codes When you connect the instrument to a terminal or PC, you can read RS 232 error codes. There are two types of error codes. Status mes sages result from a command error; diagnostic error codes result from errors that occur during normal operation or when running the calibra tion routine.
  • Page 157 02 = Mid position search error 03 = Mid position range error 04 = Offset search error 05 = Offset range error 06 = Offset gain error 07 = Gain range error 08 = Gain search error A 29 222PS Operator Manual...

  • Page 158: Transfer Options

    The zzzz values are meaningful only when error type 2 and error type 4 codes are given. Transfer Options There are two ways to transfer data between the 222PS Digital Storage Oscilloscope and a PC: local transfer and transfer via modem. Transfer to a Local PC...
  • Page 159 When the remote modem answers, the PC operator can exit the communications utility and start the instrument control utility (either by command or by exiting the terminal communications utility without hanging up the modem). A 31 222PS Operator Manual...

  • Page 160: Rs 232 Interface Specifications

    Appendix B: Remote Communication Step 3: The 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 must move the probes to new test points or make other adjust ments to gather new waveforms.

  • Page 161: Levels

    Optional Accessories CAT200 This is a Tektronix software product. It provides a virtual front panel (a graphical interface with mouse input facilities) on the PC screen that allows you to fully control 222PS functions from the PC. Waveforms...

  • Page 162: Rs 232 Interconnection Cables

    PC/XT 222PS DB 25 RS 232 C DE 9 Figure A 12: RS 232 Interconnection Cable Pin Wiring Table A 7: 222PS Interconnect Pin Assignments (DCE) Male at the DSO (DCE) Modem (DTE) PC/XT (DTE) PC/AT A 34...
  • Page 163 Appendix B: Remote Communication Table A 7: 222PS Interconnect Pin Assignments (Cont.) (DCE) Male at the DSO (DCE) Modem (DTE) PC/XT (DTE) PC/AT SGND SGND *Connection optional A 35 222PS Operator Manual...
  • Page 164 Appendix B: Remote Communication A 36 Appendices...

  • Page 165: Appendix C: Quick Checks

    The only test equipment required is a patch cord. The Autoset Tests procedure uses the automatic setup feature of the 222PS to verify the acquisition system, trigger circuits and waveform display capability. The standard accessory probes, included with this oscilloscope, are the only equipment needed.

  • Page 166: Conventions

    Appendix C: Quick Checks Conventions Throughout these procedures the following conventions apply: Each test procedure uses the following general format: Title of Test Equipment Required Prerequisites Procedure Each procedure consists of many steps, substeps, and subparts as required to do the test. Steps, substeps, and subparts are sequenced as follows: First Step First Substep...

  • Page 167: Initial Setup Procedure

    Press the ON button of the oscilloscope to toggle it into the operating mode. Self Cal Tests This procedure uses internal routines to verify that this 222PS functions and can properly perform self calibration of both input channels. This procedure also guarantees the highest accuracy state for the Perform ance Tests that follow.
  • Page 168 If a self calibration step fails, the currently stored calibration constants are not changed. Run the failed routine again. Refer to the Trouble shooting in the Maintenance section of the 222PS service manual for an explanation of the error codes.

  • Page 169: Autoset Tests

    Autoset Tests The autoset test procedure, while simple and easy to perform, will check 90% of the functionality of your 222PS Digital Storage Oscillo scope. Equipment Required (See Table A 8) P850 probe (standard accessory, Item 13)
  • Page 170 Appendix C: Quick Checks A 42 Appendices...

  • Page 171: Appendix D: Performance Tests

    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: Vertical Checks Horizontal Checks Trigger Checks These performance check procedures verify the performance require ments of the instrument as listed in Appendix D: Specification.

  • Page 172: Equipment Required

    Appendix D: Performance Tests Related Information Read General Instructions and Conventions that start on page A 37. Equipment Required Table A 8 lists all the test equipment required to do the performance check procedure. Test equipment specifications described are the minimum necessary to provide accurate results.

  • Page 173: Table A 8: Test Equipment

    BNC input, 011 0049 01 tween genera male BNC output tors and probes 6 Cable, 50 W 50 W, 36 in, male Tektronix part Signal Coaxial to male BNC con number connection nectors 012 0482 00 A 45 222PS Operator Manual...
  • Page 174 Table A 8: Test Equipment (Cont.) Item Number Minimum Example Purpose and Description Requirements 7 Connector; BNC female to Tektronix part Signal coupling dual banana dual banana plug number to External Trig 103 0090 00 ger and Com mon inputs...

  • Page 175: Preparation

    ......Front Panel Controls AUTO SETUP ....Press for initial signal display A 47 222PS Operator Manual...

  • Page 176: Vertical Checks

    Appendix D: Performance Tests Procedure Check/Adjust Intensity Control Adjust the INTEN control for a sharp display. Adjust FOCUS Control Press the AUX FUNCT button on the top panel. Select the ALIGN menu choice, then the XY menu choice. These selections display a test pattern on the CRT. Adjust the FOCUS control for the best definition of the pattern.
  • Page 177 ........... . . center the waveform A 49 222PS Operator Manual...
  • Page 178 Appendix D: Performance Tests Trigger Area Trigger MODE ....AUTOBL Trigger SOURCE ....VERT Trigger SLOPE .
  • Page 179 Set channel 2 coupling to GND. Turn off channel invert by pressing the DISPL button and selecting INV1. Repeat steps a through n for channel 2. Check Input Coupling (Set up the test equipment as shown in Figure A 14.) A 51 222PS Operator Manual...
  • Page 180 Appendix D: Performance Tests Calibration Generator BNC to Banana Jack Adapter with Wire Leads Channel 2 Probe Figure A 14: Setup for Input Coupling Check Set: CH 2 Coupling SEC/DIV 0.5 ms Trigger MODE AUTOLVL CH 2 VOLTS/DIV 0.5 V Set the Calibration Generator to a standard amplitude mode output signal of 2.0 V.

  • Page 181: Table A 9: Volts Per Division Accuracy Settings

    3.84 div - 4.16 div 0.1 V 0.5 V 4.80 div - 5.20 div 0.2 V 4.80 div - 5.20 div 0.5 V 3.84 div - 4.16 div These ranges are available only with a P400 X1 probe. A 53 222PS Operator Manual...
  • Page 182 Appendix D: Performance Tests Table A 9: Volts per Division Accuracy Settings (Cont.) Volts/Div Calibration Generator Amplitude Limits 4.80 div - 5.20 div 10 V 4.80 div - 5.20 div 20 V 3.84 div - 4.16 div 10 V 50 V 4.80 div - 5.20 div 20 V 100 V...
  • Page 183 Vertically position the top of the square wave on the second horizontal graticule line above the center. Position the rising edge at the trigger position to the center vertical graticule line. CHECK for 0.15 division or less of rolloff or overshoot at the front corner. A 55 222PS Operator Manual...
  • Page 184 Appendix D: Performance Tests Set: CH 1 Coupling CH1 OFF CH 2 Coupling CH 2 VOLTS/DIV 50 mV Disconnect the channel 1 probe from the BNC to banana jack adapter and connect the channel 2 probe. Repeat parts e - g for channel 2. Disconnect the channel 2 probe from the test equipment.

  • Page 185: Horizontal Check

    BNC to banana jack Adapter (Item 1) External Power AC Adapter (Item 3) 2 P850 probes (Item 11) Wire Leads (Item 12) Prerequisites Self Tests and Autoset Tests starting on page A 39 Preliminaries on page A 47 A 57 222PS Operator Manual...
  • Page 186 Appendix D: Performance Tests Time Mark Generator 50 W Termination BNC to Banana Jack Adapter with Wire Leads Channel 1 Probe Figure A 17: Setup for Horizontal Test Initial Control Settings Power and Display External Power ....External Power AC Adapter connected Power...
  • Page 187 Set the Time Mark Generator to output 1 ms time markers. Vertically position the baseline of the time mark signal to the center horizontal graticule line. Horizontally position the left time marker with the first vertical graticule line. A 59 222PS Operator Manual...

  • Page 188: Trigger Checks

    Appendix D: Performance Tests CHECK the accuracy over the center 8 divisions. Accuracy should be ± 0.16 divisions (2%). Disconnect the test equipment from the oscilloscope. Trigger Checks The Trigger Checks procedures verify those characteristics that relate to the trigger systems and that are listed as checked under Warranted Characteristics in Appendix D: Specifications.
  • Page 189 ....50 mV CH 1 VAR ......A 61 222PS Operator Manual...
  • Page 190 Appendix D: Performance Tests Horizontal Area X10 MAG ......SEC/DIV ......50 ns Trigger Area Trigger MODE...
  • Page 191 Connect the other side of the BNC T connector via a 50 W coaxial cable and BNC to dual banana plug connector to the EXT TRIG INPUT and EXT TRIG COMM input jacks on the rear panel. A 63 222PS Operator Manual...
  • Page 192 Appendix D: Performance Tests Vertically center the display. Set the Leveled Sine Wave Generator to display 5 divisions of amplitude at 50 kHz. CHECK for a triggered display (TRIG'D indicator light on). Set the SEC/DIV control to 50 ns. Set the Leveled Sine Wave Generator to display 5 divisions of amplitude at 10 MHz.

  • Page 193: Appendix E: Specifications

    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 typical characteristics.
  • Page 194 Appendix E: Specifications Table A 10: Nominal Traits Vertical System (Cont.) Name Description Maximum Input Voltage, 850 V (DC + peak AC) or 600 VAC rms ; Peak Probe Common to Surge Voltage: 6000 V for 250 ms or less (P850 Chassis only);...
  • Page 195 Appendix E: Specifications 1000 P850 600 V P400 Voltage (RMS) 0.1 MHz 1 MHz 10 MHz Frequency Figure A 20: Maximum Normal Mode Voltage Versus Frequency Derating Curve A 67 222PS Operator Manual...

  • Page 196: Table A 11: Nominal Traits Horizontal System

    Appendix E: Specifications Voltage (RMS) Chassis Floating Chassis Grounded 30 V 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz Frequency Figure A 21: Maximum Common Mode Voltage Versus Frequency Derating Curve Table A 11: Nominal Traits Horizontal System Name Description Range, Sample Rate...

  • Page 197: Table A 12: Nominal Traits Triggering System

    Single graticule: 8 divisions high by 10 divisions Graticule wide, where divisions are 0.5 cm by 0.5 cm (0.2 in by 0.2 in) CRT Reflectivity CRT filter shield has an anti reflectance surface to aid viewing in high ambient light conditions A 69 222PS Operator Manual...

  • Page 198: Table A 14: Nominal Traits Power System

    Appendix E: Specifications Table A 14: Nominal Traits Power System Name Description Internal Battery, Type Sealed lead acid External Power, Input DC: 12 to 28 VDC Voltage Range AC: 16 to 20 V AC, 47 Hz to 400 Hz Pin to Pin External Power, Input -0.5 to 28 V (DC + peak AC) Voltage Range...

  • Page 199: Table A 16: Nominal Traits Mechanical

    Probe Length, Detachable 2.0 m (78.7 in), P850 Warranted Characteristics This subsection lists the various warranted characteristics that describe the 222PS PowerScout. Included are electrical and environmental characteristics. Warranted characteristics are described in terms of quantifiable performance limits that are warranted.

  • Page 200: Table A 17: Warranted Characteristics Vertical System

    Appendix E: Specifications As stated above, this subsection lists only warranted characteristics. A list of typical characteristics starts on page A 76. Performance Conditions The electrical characteristics found in these tables of warranted char acteristics apply when the scope has been adjusted at an ambient temperature between +15 C and +35 C and is operating at an...
  • Page 201 For example at 10 ms per division the useful repetitive bandwidth is 500 kHz. At seconds per division settings faster than 0.5 ms/div, repetitive bandwidth is limited to 10 MHz by the input amplifier. A 73 222PS Operator Manual...

  • Page 202: Table A 19: Warranted Characteristics Triggering System

    Appendix E: Specifications Table A 18: Warranted Characteristics Horizontal System Name Description Accuracy, Displayed ±2% with X1 magnification (X1) Accuracy, Displayed ±5% with X10 magnification (X10) Table A 19: Warranted Characteristics Triggering System Name Description Jitter, Trigger 2 ms/div to 50 ns/div: 1/50 division ±2 ns in X1 magnification 1/5 division ±2 ns in X10 magnification Sensitivity, CH 1 and...

  • Page 203: Table A 20: Warranted Characteristics Environmental, Safety, And Reliability

    One 10.6 cm (4 in) or balance point drop per corner To ensure compliance use the specified shielded cable and connector housing for the RS 232 connections and detach the probes or store them in the probe pouch. A 75 222PS Operator Manual...

  • Page 204: Table A 21: Typical Characteristics Vertical System

    Appendix E: Specifications 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 warranted. This subsection lists only typical characteristics. A list of warranted characteristics starts on page A 72.

  • Page 205: Table A 22: Typical Characteristics Horizontal System

    Battery, Excessive Instrument operation automatically interrupted Discharge Protection when battery voltage drops to 7.32 VDC Battery, Minimum Three hours at 25 Operating Time Battery, Capacity Over C: 80% Operating Temperature C: 100% C: 110% A 77 222PS Operator Manual...
  • Page 206 Appendix E: Specifications Table A 24: Typical Characteristics Power 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) A 78 Appendices...

  • Page 207: Table A 25: Standard Accessories

    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 also call the Tektronix National Marketing Center toll free at 1 800 426 2200.

  • Page 208: Table A 26: Optional Accessories

    Appendix F: Accessories Optional Accessories You can order the following accessories. Table A 26: Optional Accessories Accessory Part Number 222PS PowerScout Service Manual 070 8098 XX Spare battery 146 0075 00 Accessory pouch (for spare battery or external 016 0993 01...

  • Page 209: Instrument Options

    Appendix F: Accessories Instrument Options You can order the following options for the 222PS PowerScout. Table A 27: Instrument Options Description Part Number Option 05 instrument supplied with CAT200 Virtu CAT200 al Instrument Software Option 04 instrument supplied with WP200 Intelli...
  • Page 210 Appendix F: Accessories A 82 Appendices...
  • Page 211 Glossary & Index...
  • Page 213 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 envelope. (See those definitions.) Acquisition Sample Interval The time between each sample the instrument acquires from the input signal.
  • Page 214 Glossary Averaging Acquisition Mode An acquisition mode in which the instrument displays a waveform that is the point by point 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 phosphor glows on the screen.
  • Page 215 Major Division One mark dividing the screen either horizontally or vertically for measurement purposes. The 222PS has eight major vertical divisions and ten major horizontal divisions. Memory The ability of the instrument to store data such as waveforms, front panel settings, and configurations.
  • Page 216 Minor Division Subdivisions of major divisions for more accurate measurement. Minor divisions are seen as marks along the horizontal and vertical center lines. The 222PS has five minor divisions in each major division in both directions. Normal Acquisition Mode The most commonly used acquisition mode, in which the instru ment displays one sample point for each point it acquires.
  • Page 217 A communication interface that can be used to control the instru 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 sample interval.
  • Page 218 222PS display. Self Calibration A procedure which fine tunes a system for increased accuracy. The 222PS provides self calibration routines for both channels, the external trigger source, and display alignment. Setup A specific configuration of front and top panel control settings.
  • Page 219 Trigger Position The location of the trigger event relative to the waveform on the display. When the 222PS is in store mode, the trigger position can be at the beginning, in the middle, or at the end of the waveform.
  • Page 220 Glossary 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 of resistance.
  • Page 221 2 13, 3 35 3 36 aliasing, 3 26 3 28 deep discharge of, 3 40 3 41 definition, G 1 low charge indicator, 3 37 amplitude operating with, 3 35 3 41 and triggering, 3 76 222PS Operator Manual...
  • Page 222 Index recharging after deep discharge, coupling, setting, 3 19 3 20 3 40 3 41 DC coupling, 3 19 replacing, 3 39 definition, G 2 spare, A 80 displaying, 3 18 3 19 time out feature and, 3 37 ground coupling, 3 19 battery power, slow time bases with, inverting, 2 7, 3 22 3 23 3 26...
  • Page 223 3 2 EXT TRIG INPUT connector, 2 15, ground coupling, 3 19 3 66 definition, G 3 external battery charger, A 80 readout, 2 7 external power ground symbol, readout, 2 7 connecting, 2 15, 3 41 222PS Operator Manual...
  • Page 224 Index horizontal axis, definition, G 3 magnifying a signal, 3 29 3 30 horizontal controls, 2 5, 3 25 and time base modes, 3 29 horizontal position horizontal position of, 3 25 knob, 2 6 in XY mode, 3 29 of magnified signal, 3 25 knob, 2 6 of stored waveforms, 3 25...
  • Page 225 RCL button, 2 11, 3 53 teristics readout performance check, procedures, A 43 > sign, 3 76 performance tests, A 43 A 64 clearing, 3 21 3 22 equipment required, A 44 A 46 definition, G 4 222PS Operator Manual...
  • Page 226 Index displaying, 3 21 3 22 definition, G 5 magnified signal, 3 29 RT, A 32 saved waveform, 3 52 3 54 RX, A 32 store mode, 3 61 stored waveform, 2 8 trigger level, 3 69 turning off, 2 12 vertical, 2 6, 2 8 READY, A 19 safety, symbols, 1 3...
  • Page 227 3 13, 3 31 set up, 3 5 3 8 setup definition, G 6 erasing, 3 58 Tektronix National Marketing Center, recalling, 2 12, 3 57 3 60 1 1, A 79 saving, 2 12, 3 39, 3 51, temperature...
  • Page 228 Index transfer options, A 30 position, A 7 button, 2 12 via cable, A 30 definition, G 7 via modem, A 30 in magnified signals, 3 29 TRG, A 19 in store mode, 3 70 3 71 TRG?, A 18 menu, 3 71 TRIG COM connector, 2 15, 3 66 MID, 3 70 3 71...
  • Page 229 3 1, 3 3 enveloped, 3 2 3 3 frequency, 3 26 3 27 inverting, 3 22 3 23 normal, 3 1, 3 3 recalling, 3 53 3 60 saving, 2 12, 3 51 3 54 222PS Operator Manual...
  • Page 230 Index I 10 Index...

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