Tektronix 211 Operator'S Manual Download | Manualshive

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Summary of Contents for 211

Page 1: ...TEKTRONIX 211 OSCILLOSCOPE OPERATORS MANUAL ...

Page 2: ...ca All rights reserved Contents of this publication may not be reproduced in any form without permission of the copyright owner U S A and foreign Tektronix products covered by U S and foreign patents and or patents pending Tektronix Inc P O Box 500 Beaverton Oregon 97005 070 1163 00 971 ...

Page 3: ... Operation AC Operation Battery Charging Operating Temperature Controls And Connectors General Operator s Adjustments General Vertical Gain Step Attenuator Balance Horizontal Gain Horizontal Timing Focus Auto Preset 211 0perators Manual Page 1 2 3 4 5 5 10 10 10 11 11 11 11 ...

Page 4: ...Trigger Source Trigger Coupling Trigger Slope Trigger Level Horizontal Sweep Rate External Horizontal Operation Applications General ii Peak To Peak Voltage Measurements AC DC Voltage Measurements Time Duration Measurements Determining Frequency Risetime Measurements 211 0perators Manual Page 12 13 13 13 14 14 16 17 18 18 19 20 21 22 25 28 31 32 ...

Page 5: ...llivolt at reduced bandwidth to 50 volts division at the tip of the integral high impedance probe The trigger circuits provide stable triggering over the full bandwidth capabilities of the vertical system The horizontal deflection system provides calibrated sweep rates from 200 milliseconds to five microseconds division A continuously variable sweep magnifier provides uncalibrated sweep rates to a...

Page 6: ... batteries depends on trace intensity charge temperature and discharge temperature Typical operating time from fully charged batteries at maximum trace intensity when charged and operated at 20 C to 30 C 68 F to 86 F is 4 5 hours Extended operating time is provided at lower trace intensity The BATTERY meter provides an indication of relative charge level When the meter indicates in the FULL range ...

Page 7: ...er Also when operated with fully charged batteries from an AC line below about 110 volts and at maximum true intensity the internal batteries slowly discharge approxi mately 36 hours of continuous operation can be obtained with fully charged batteries at maximum intensity and 104 volt line The internal batteries cannot be recharged while the instrument is operated from the AC line If the 21 1 is t...

Page 8: ...11 to the various power outlet receptacles Battery Charging The charging characteristics of the nickel cadmium N iCd cells used in th is instrument vary with the temperature at which they are charged Batteries charged at about 20 C to 30 C 68 F to 86 F will deliver more energy than when the same batteries are charged at a higher or lower temperature To charge the batteries connect the instrument t...

Page 9: ...nected to the AC line Operating Temperature The 211 can be operated where the ambient air temperature is between 15 C and 55 C 5 F and 131 F The batteries should be charged only in ambient temperatures between 0 C and 40 C 32 F and 104 F CONTROLS AND CONNECTORS General The controls and connectors for operation of the 211 are located on the right side of the instrument To make full use of the capab...

Page 10: ...factor variable con trol must be in CAL position for indicated deflection Calibrated position accuracy within 5 Vertical system bandwidth 1 mV div 100 kHz 2 mV div 200 kHz 5 mV div 400 kHz 10 mV div to 50 V div 500 kHz 6 211 0perators Manual ...

Page 11: ...ontrols the vertical position of the trace 5 Horizontal POSITION controls the horizontal position of the trace 6 VOLTS DIV VARiable prov ides continuously variable deflection factors between the calibrated settings of the VOLTS DIV switch Extends the maximum deflection factor to at least 150 volts div 7 HORIZontal MAGnifier provides continuously variable un calibrated sweep magnification to a maxi...

Page 12: ... center the sweep is triggered on the positive going slope of the trigger signal to the right of center on the negative going slope When the LEVEL SLOPE control is set to the AUTO PRESET detent the sweep is automatically triggered at a preset level on the positive going slope Stable triggering requires a minimum of 0 2 division internal or 1 0 volt external signal amplitude 8 211 0perators Manual ...

Page 13: ...f the input signal are passed to the vertical amplifier system input 16 POWER controls power to the instrument Does not interrupt charging current to the internal batteries when the instrument is connected to an AC line voltage 17 INT EXT selects the source of the trigger signal INTernal the sweep is triggered from a sample of the vertical deflection signal EXTernal the sweep is triggered from the...

Page 14: ...e fam ii iar with instrument operation before attempting to make these adjustments Vertical Gain Connect the 211 probe tip to an accurate 0 2 volt source such as a Tektronix 067 0502 01 Standard Amplitude Cali brator Set the VOLTS DIV switch to 50 m and set the VERT GAIN adjustment for exactly four divisions of deflection Step Attenuator Balance Obtain a free running trace with no signal applied t...

Page 15: ...e SEC DIV switch set to 1 m apply one millisecond t ime marks Adjust the TRIGGER controls for a stable display Adjust the SWP CAL adjustment for exactly eight divisions of deflection between the second and tenth time mark Focus Set the SEC DIV switch to 10 V and the INPUT COUPLING switch to GND With no signal applied to the EXT TRIG OR HORIZ INPUT banana jack adjust the FOCUS screwdriver adjustmen...

Page 16: ...ince the brightness of the CRT display affects the amount of current drained from the batteries the INTENSITY control should be set to the minimum level that provides a usable display This will allow the maximum operating time from the internal batteries The setting of the INTENSITY control may affect the correct focus of the display Slight re adjustment of the FOCUS may be necessary when the inte...

Page 17: ... signal is determined by the signal amplitude the setting of the VOLTS DIV switch and the setting of the VOLTS DIV VAR control The calibrated deflection factors indicated by the VOLTS DIV switch apply only when the VOLTS DIV VAR control is set to the CAL detent fully clockwise The VOLTS DIV VAR control provides variable uncali brated vertical deflection factors between the calibrated settings of t...

Page 18: ...external horizontal display If interference is excessive with unshielded leads use a coaxial cable with a suitable adapter Ground Considerations Reliable signal measurements cannot be made unless both the oscilloscope and the unit under test are connected together by a common reference ground lead in addition to the signal lead or probe The ground strap on the attached probe provides the best grou...

Page 19: ...e waves which have low frequency components The AC coupling position provides the best display of signals with a DC component which is much larger than the AC component The GND pos1t1on provides a ground reference at the input of the 211 without the need to externally ground the probe The signal applied to the probe is internally discon nected from the input circuit and connected to ground through...

Page 20: ...ore connecting the probe to a signal source with a large DC component set the INPUT COUPLING switch to GND Then connect the probe to the signal source 2 Wait several seconds for the input coupling capacitor to charge 3 Set the INPUT COUPLING switch to AC The display will remain on the screen so the AC component of the signal can be measured in the normal manner Trigger Source INT For most applicat...

Page 21: ...s wave shaping circuits etc The signal from a single point in the circuit under test can be con nected to the EXT TRIG OR HORIZ INPUT banana jack Then the sweep is triggered by the same signal at all times to allow amplitude time relationship or waveshape changes or signals at various points in the circuit to be examined without resetting the trigger controls Trigger Coupling For Normal triggering...

Page 22: ... on the selected slope particularly when the displayed waveform has a high repetition rate When several cycles of a signal appear in the display the selection of the trigger slope is often unimportant However if only a certain portion of a cycle is to be displayed correct setting of the LEVEL SLOPE control is important to provide a display which starts on the desired slope of the input signal Trig...

Page 23: ...ency signals or in the absence of an adequate trigger signal the sweep free runs to produce a reference trace When an adequate trigger signal is applied the free running condition ends and the sweep is triggered to produce a stabled isplay Horizontal Sweep Rate The SEC DIV switch provides 15 calibrated sweep rates ranging from 200 milliseconds to 5 microseconds division HORIZ MAG switch set to CAL...

Page 24: ...d not be used for making accurate time measurements Position the start of the timing area to the first division vertical line and set the SEC DIV switch so the end of the timing area falls between the first and ninth division vertical lines External Horizontal Operation In some applications it is desirable to display one signal versus another signal X Y rather than against time 20 211 0perators Ma...

Page 25: ...ce the X and Y channels of th is instrument are not time matched some inherent phase shift can be expected in the external horizontal display take this inherent phase shift into account when making measurements APPLICATIONS General The following information describes the procedures and techniques for making measurements with a 211 Oscilloscope These applications are not described in detail since e...

Page 26: ...e ground strap to provide a common ground 3 After several seconds set the INPUT COUPLING switch to AC NOTE For ow frequency signals below about 10 hertz use the DC position 4 Set the VOLTS DIV switch to display about five divisions of the waveform 5 Set the Triggering controls to obtain a stable display Set the SEC DIV switch to a position that displays several cycles of the waveform 22 211 0perat...

Page 27: ... the viewing area Move the display with the horizontal POS control so one of the upper peaks lies near the center vertical line see Fig 2 7 Measure the divisions of vertical deflection from peak to peak Make sure the VAR VOLTS DIV control is in the CAL position Vertical deflection Position to center vertical line Fig 2 Measuring peak to peak voltage of a waveform 211 0perators Manual 23 ...

Page 28: ...p 7 by the VOLTS DIV switch setting Example Assume a peak to peak vertical deflection of 4 6 divisions see Fig 2 using a VOLTS DIV switch setting of 5 Using the formula Volts Peak to Peak vertical deflection divisions Substituting the given values Volts Peak to Peak 4 6 X 0 5 V The peak to peak voltage is 2 3 volts 24 211 0perators Manual X VOLTS DIV setting ...

Page 29: ...graticule or other reference line If the voltage to be measured is negative with respect to ground position the trace to the top line of the graticule Do not move the vertical POS control after this reference line has been established NOTE To measure a voltage level with respect to another voltage rather than ground make the following changes in step 3 Set the INPUT COUPLING switch to DC and conne...

Page 30: ...V switch to a setting that displays several cycles of the signal 7 Measure the distance in divisions between the reference line and a point on the waveform at which the DC level is to be measured For example in Fig 3 the measure ment is made between the reference line and point A 8 Establish the polarity of the signal If the waveform is above the reference line the voltage is positive below the li...

Page 31: ...ltage with respect to a reference Example Assume that the vertical distance measured is 4 6 divisions see Fig 3 the waveform is above the reference line using a VOLTS DIV setting of 2 Using the formula Instantaneous Voltage vertical distance X 1 X VOLTS DIV po artty divisions setting 211 0perators Manual 27 ...

Page 32: ... AC power line RMS voltage is 117 V the maximum allowable potential on the probe common is 250 117 133 V RMS When battery operated with the AC power plug secured in its insulated cover the maximum safe potential between probe common and the 211 case exterior is 500 V RMS or 700 V DC peak AC Use the same measurement procedure given previously for Ground Reference Remember that the DC reference line...

Page 33: ... divisions of the waveform 3 Set the TRIGG ER controls to obtain a stable display 4 Set the SEC DIV switch to the fastest sweep rate that displays less than eight divisions between the time measure ment points see Fig 4 v J I II i l __Horizontal I distance I I I Fig 4 Measuring the time duration between points on a waveform 211 0perators Manual 29 ...

Page 34: ... control to center the dis play within the center eight divisions of the graticu le 7 Measure the horizontal distance between the time measurement points Be sure the HOR IZ MAG control is set to the calibrated position 8 Multiply the distance measured in step 7 by the setting of the SEC DIV switch Example Assume that the horizontal distance between the time measurement points is five divisions see...

Page 35: ... measurement technique can also be used to measure the frequency of a signal The frequency of a periodically recurrent signal is the reciprocal of the time duration period of one cycle Use the following procedure 1 Measure the time duration of one cycle of the wave form as described in the previous application 2 Take the reciprocal of the time duration to determine the frequency 211 0perators Manu...

Page 36: ...ent is made The following procedure gives the basic method of measuring risetime between the 10 and 90 points of the waveform Falltime can be measured in the same manner on the trailing edge of the waveform 1 Connect the probe tip to the signal source Use the probe ground strap to establish a common ground 2 Set the VOLTS DIV switch and VAR VOLTS DIV control to produce a display an exact number of...

Page 37: ...he rising portions and 10 down from the top of the rising portion 90 point Table 1 Risetime Measurement Points Vertical Divisions vertically display 10 and 90 between 10 divisions points 90 points 4 0 4 and 3 6 divisions 3 2 5 0 5 and 4 5 divisions 4 0 6 0 6 and 5 4 divisions 4 8 7 Adju st the horizontal POS control to move the 10 point of the waveform to the first graticule line For example with ...

Page 38: ...e 10 and 90 points Be sure the HOR IZ MAG control is set to the calibrated position 9 Multiply the distance measured in step 8 by the setting of the SEC DIV switch Example Assume that the horizontal distance between the 10 and the 90 points is four divisions see Fig 5 and the SEC DIV switch is set to 10 µS 34 211 0perators Manual ...

Page 39: ...he time duration formula to risetime Risetime Time Duration horizontal distance X SEC DIV divisions setting Substituting the given values Risetime 4 X 10 µS The risetime is 40 microseconds 211 0perators Manual 35 ...

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