Tektronix 2335 Instruction Manual Download Page 30

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OPERATING CONSIDERATIONS

This section contains basic operating information and

techniques that should be considered before attempting
any measurements.

GRATICULE

The graticule is internally marked on the faceplate of

the crt to enable accurate measurements w itho ut parallax

error (see Figure 8). It is marked w ith eight vertical and ten
horizontal major divisions. In addition, each major division

is divided into five subdivisions. The vertical deflection

factors  and  horizontal  tim ing  are calibrated to the graticule
so  that  accurate  measurements  can  be  made  directly  from
the  crt.  Also,  percentage  marks for the  measurement o f  rise

and fall times are located on the left side o f the graticule.

GROUNDING

The most reliable signal measurements are made when

the 2335 and the u nit under test are connected by a

2335 Operators

Figure 8. Graticule measurement markings.

Summary of Contents for 2335

Page 1: ...Tektronix Inc P O Box 500 Beaverton Oregon 97077 070 4115 00 ...

Page 2: ...Tektronix COMMITTED TO EXCELLENCE PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL INSTRUCTION MANUAL First Printing DEC 1980 Serial Number _______________________Revised JUL 1981 ...

Page 3: ... of Tektronix Inc Products of Tektronix Inc and its subsidiaries are covered by U S and foreign patents and or pending patents TEKTRONIX TEK SCOPE MOBILE and I l f are reg istered trademarks of Tektronix Inc TELEQUIPMENT is a registered trademark of Tektronix U K Limited Printed in U S A Specification and price change privileges are reserved ...

Page 4: ...C A L 7 HORIZONTAL 10 A T R IG G E R 12 REAR P A N E L 15 Page OPERATING CONSIDERATIONS 17 GRATICULE 17 GROUNDING 17 SIGNAL CONNECTIONS 18 INPUT COUPLING CAPACITOR PRECHARGING 18 INSTRUMENT C O O LIN G 19 INSTRUMENT FAM ILIAR IZATIO N 20 INTRODUCTION 20 EQUIPMENT REQ UIRED 20 NORMAL SWEEP DISPLAY 21 DISPLAYING A SIGNAI 22 OPERATOR S CHECKS AND ADJUSTMENTS 32 INTRODUCTION 32 TRACE ROTATIO N 32 PROB...

Page 5: ...7 Amplitude Comparison 49 Time Comparison 51 DELAYED SWEEP MAGNIFICATION 53 Magnified Sweep Runs After Delay 53 Pulse Jitter Time Measurement 55 Page DELAYED SWEEP TIME MEASUREMENTS 55 Time D uration 56 Rise T im e 57 Time Difference Between Repetitive Pulses 59 Time Difference Between Two Time Related Pulses 61 OPTIONS 63 OPTION 0 3 63 SPECIFICATION 64 ACCESSORIES 87 STANDARD ACCESSORIES INCLUDED...

Page 6: ...trols connectors and indicators and calibrator output Horizontal controls and indicator Trigger controls connector and indicator Rear panel connectors Graticule measurement m arkings Initial setup for instrument familiarization procedure Probe compensation Vertical display accuracy Peak to peak waveform voltage Instantaneous voltage measurement Algebraic addition Common mode rejection Time duratio...

Page 7: ...solution phase difference 49 21 Delayed sweep magnification 54 22 Pulse jitte r 55 23 Time duration using delayed sweep 56 24 B DELAY TIME POSITION controlsettings 57 25 Rise time differential time method 58 26 Time difference between repetitive pulses 60 27 Time difference between two time related pulses 62 iv 2335 Operators ...

Page 8: ... 2 Option 03 Line Voltage and Fuse Selection 4 3 Equipment Required for InstrumentFamiliarization Procedure 21 4 Electrical Characteristics 65 5 Environmental Characteristics 83 6 Physical Characteristics 85 7 Option Electrical Characteristics 86 2335 Operators V ...

Page 9: ...tements identify conditions or practices that could result in personal injury or loss of life A This symbol indicates where applicable cautionary or other information is to be found For maximum input voltage see Table 4 Symbols as Marked on Equipment Terms as Marked on Equipment CAUTION indicates a personal injury hazard not immediately accessible as one reads the markings or a DANGER High voltage...

Page 10: ...oss of the protective ground connection all accessible conductive parts including knobs and controls that may appear to be insulating can render an electric shock Use the Proper Power Cord Use only the power cord and connector specified for your product Use only a power cord that is in good condition For detailed information on power cords and con nectors see Figure 2 Use the Proper Fuse To avoid ...

Page 11: ......

Page 12: ...r division along with delayed sweep features thus accommodating accurate relative time measurements A X10 magnifier circuit extends the maxi mum sweep speed to 5 ns per division when the SEC DIV switch is set to 0 05 fis per division The instrument is shipped with the following standard accessories 2 Probe packages 1 Accessory pouch 1 Operators manual 1 Service manual 1 Accessory pouch zip lock 1 ...

Page 13: ... if the wrong line fuse is installed LINE VOLTAGE SELECTION The 2335 operates from either a 115 V or a 230 V nominal ac power input source with a line frequency ranging from 48 Hz to 440 Hz Before connecting the power cord to a power input source verify that the LINE VOLTAGE SELECTOR switch located on the rear panel see Figure 1 is set for the correct nominal ac power input source voltage To conve...

Page 14: ...ED PERSONNEL FOB CONTINUED fffiE PROTECTION REPUTE ONLY WTH SPECIFIES TYPE AND RATED FUSE DISCONNECT POWER INPUT BEFORE REPLACING FUSE CAUTION TO AVOID ELECTRIC SHOCK THE POWER COffl PROTECTIVE GROUNDING CONDUCTOR FAUST BE CONNECTED TO GROUND UNE VOLTAGE SELECTOR RANGE mv asy lEKIMWX INC BEAVERTON OREGON USA r rr LINE FUSE CORD SET SECURING CLAMP 4115 15 Figure 1 LINE VOLTAGE SELECTOR switch line ...

Page 15: ...inal 200 to 250 V ri c a orr w r 1 Press in the fuse holder cap and release it with a 0 5 A 250 V Fast blow u k ___ shaht counterc ockwise rotation Table 2 Option 03 Line Voltage and Fuse Selection 2 Pul the cap with the attached fuse inside out of _ thp fi isp holder Line Voltage Selector Switch Position Voltage Range Fuse Data 100 V Nominal 90 to 115 V 3 Verify proper fuse value see Tables 1 and...

Page 16: ... manual Contact your Tektronix representative or local Tektronix Field Office for additional power cord information NOTE See Appendix A at the back o f this manual for further power input information P lu g Configuration Usage Nominal Line Voltage AC Reference Standards Option North American 120V 15A 120V ANSI 073 11 NEMA 5 15 P EC 33 Standard ir Universal Euro 240V 10 16A 240V CEE 7 II IV V lld i...

Page 17: ... ON press again for OFF jP TRACE ROTATION Control Screwdriver control used to align the crt trace with the horizontal grati cule lines T FOCUS Control Adjusts for optimum display definition T Internal Graticule Eliminates parallax viewing error between the trace and graticule lines Rise time amplitude measurement points are indicated at the left edge of the graticule T ASTIG Control Screwdriver co...

Page 18: ... the inputs of the vertical deflection system or for an X Y display In the X Y mode the signal connected to the CH 1 OR X connector provides horizontal deflection and the signal connected to the CH 2 OR Y connector provides vertical deflection T f Input Coupling Switches AC GND DC Select the method of coupling input signals to the vertical deflection system AC Input signal is capacitiveiy coupled ...

Page 19: ...itches Select the vertical deflection factor in a 1 2 5 sequence VAR control must be in detent to obtain a calibrated deflection factor IX PROBE Indicates the deflection factor selected when using either a IX probe or coaxial cable 10X PROBE Indicates the deflection factor selected when using a 10X probe K y VAR Controls Provide continuously variable uncal ibrated deflection factors between the ca...

Page 20: ...th Channel 1 and Channel 2 vertical inputs at sweep speeds from 0 5 ms per division to 0 5 s per division ADD Selects the algebraic sum of the Channel t and Channel 2 input signals for display CH 2 Selects only the Channel 2 input signal for display AUTO Press in both ALT and CHOP buttons The A Sweep circuitry automatically selects the most useful switching method ALT or CHOP for dual displays X Y...

Page 21: ...witch Press in and hold this push button to display a sample of the signal present in the A Trigger amplifier for all A TRIGGER SOURCE switch settings except VERT MODE All other signal displays are removed while the TRIG VIEW push button is held in HORIZONTAL Refer to Figure 5 for location of items 20 through 26 55 B DELAY TIME POSITION Control Selects the amount of delay time between the start of...

Page 22: ...4115 Figure 5 Horizontal controls and indicator ...

Page 23: ...ut the VAR knob and rotate it counterclockwise out of the detent 23 UNCAL Indicator LED Illuminates to indicate that the A Sweep speed is uncalibrated when the TIME PULL VAR control is rotated out of the calibrated detent 24 HORI2 MODE Switches Three push button switches that select the mode of operation for the horizontal deflection system A Horizontal deflection is provided by the A Sweep genera...

Page 24: ...s both coarse and fine control action Reverse the direction of rotation to actuate fine positioning feature When X Y VER TICAL MODE is selected the Horizontal POSITION control moves the display horizontally X axis A TRIGGER Refer to Figure 6 for location of items 27 through 34 2 SLOPE Switch Selects the slope of the signal that triggers the sweep plus When push button is released out sweep is trig...

Page 25: ...tes down to approximately 10 Hz Sweep free runs and provides a baseline trace either in the absence of an adequate trigger signal or when the repetition rate of the trigger signal is below approximately 10 Hz NORM Sweep is initiated when an adequate trigger signal is applied In the absence of a trigger signal no baseline trace will be present SGL SWP Press in the spring return push button momentar...

Page 26: ...ce voltage EXT Permits triggering on signals applied to the External Trigger Input connector A EXT EXT MO External trigger signals are attenuated by a factor of 10 32 A EXT Connector Provides a means of applying external signals to the trigger circuit 33 COUPLING Switch Determines the method used to couple the trigger signal to the input of the trigger circuit AC Signals above 20 Hz are capacitive...

Page 27: ...ely 50 kHz are attenuated This position is useful for providing a stable display of the low frequency components of a complex waveform DC All components of the signal are coupled to the A Trigger circuitry This position is useful for displaying low frequency or low repetition rate signals TRIG HOLDOFF PUSH VAR Control Provides continuous control of hoi doff time between sweeps This control improve...

Page 28: ...als to the Z axis amplifier to intensity modulate the crt display Applied signals do not affect display waveshape Signals with fast rise time and fall time provide the most abrupt intensity change Positive going signals decrease the intensity and a 5 V p p signal will produce noticeable modulation Z axis signals must be time related to the display to obtain a stable presentation on the crt 2335 Op...

Page 29: ...NTENSITY CAUTION OO NOT REMOVE COVERS REFER SERVICING TO OUAOFtED PERSONNEL FOR CONTINUED FIRE PROTECTION REFUGE ONLY WITH SPECIFIED TYPE AND RATED FUSE DISCONNECT POWER INPUT BEFORE REPLACING FUSE USE VOLTAGE SEIHTTCWS 1 B 0 V T 3 W a c v z s e v POWER MAX WATTS SO MAX VA 75 FREQ 48 WSHz TEKTRWK INC BEAVERTON OREGON USA 353BB wsMiii 4115 14 Figure 7 Rear panei connectors 16 2335 Operators ...

Page 30: ... ten horizontal major divisions In addition each major division is divided into five subdivisions The vertical deflection factors and horizontal timing are calibrated to the graticule so that accurate measurements can be made directly from the crt Also percentage marks for the measurement of rise and fall times are located on the left side of the graticule GROUNDING The most reliable signal measur...

Page 31: ...displayed waveform To maintain the original frequency characteristics of an applied signal only high quality low loss coaxial cables should be used Coaxial cables should be terminated at both ends in their char acteristic impedance If this is not possible use suitable impedance matching devices INPUT COUPLING CAPACITOR PRECHARGING When the input coupling switch is set to GND the input signal is co...

Page 32: ...r shells o f the A EXT CH 7 OR X and CH 2 OR Y connectors are attached to the 2335 chassis ground 6 Set the AC GND DC switch to AC The display will remain on the screen and the ac component of the signal can be measured in the normal manner 2 Touch the probe tip to the oscilloscope chassis ground INSTRUMENT COOLING 3 Wait several seconds for the input coupling capacitor to discharge To maintain ad...

Page 33: ... the available ac power input source voitage Refer to the Preparation for Use instructions in this manual for this information Verify that the POWER switch is OFF push button out then plug the power cord into the ac power input source outlet If during the performance of these procedures an improper indication or instrument malfunction is noted first verify correct operation of associated equipment...

Page 34: ...etition rate 1 to 100 kHz rise time ASTIG Midrange 1 ns or less signal amplitude 100 mV to FOCUS Midrange 1 V aberrations 2 Dual Input Coupler VeriiCdi DOin I I ulio v i 8 Z IT spp C3Di6 Connectors bnc female to duai bnc male AC GND DC AC VOLTS DIV 50 m IX Cable 2 required Impedance 50 Q length 42 in VOLTS DIV VAR Calibrated detent fully connectors bnc counterclockwise VERTICAl MODE Rplprt OH 1 Ad...

Page 35: ...screen NOTE Normally the resulting trace w ill be parallel with the center horizontal graticule line and should not require adjustment I f trace alignment is required see the Trace Rotation adjustment procedure under Operator s Checks and Adjustments push button out Midrange Select AUTO AC VERT MODE Fully clockwise and pushed in DISPLAYING A SIGNAL After obtaining a Norma Sweep Display baseline tr...

Page 36: ...AMPL OUTPUT 4 115 26 Figure 9 initial setup for instrument familiarization procedure 2335 Operators 23 ...

Page 37: ...nt procedure under Operator s Checks and Adjust ments The ASTIG adjustment is used in conjunction with the FOCUS control to initially obtain a well defined display over the entire trace length Once set the ASTIG control usually requires little or no adjustment 7 Move the display off the screen using the Channel 1 POSITION control 8 Press in and hold the BEAM FIND push button the display should rea...

Page 38: ...LTS DIV VAR control is fully clockwise 10 Rotate the CH 1 VOLTS DIV VAR control fully counterclockwise to its calibrated detent 11 Select CH 2 VERTICAL MODE and perform preceding steps 1 through 10 using Channel 2 controls Performance should be similar to Channel 1 12 Set both Channel 1 and Channel 2 AC GND DC switches to DC Ensure that both CH 1 and CH 2 VOLTS DIV switches are set to 0 1 for 2 di...

Page 39: ...isplayed on the crt screen for every A TRIGGER COUPLING switch position and for every A TRIG GER SOURCE switch position except VERT MODE 23 Still holding in the TRIG VIEW push button rotate the A TRIGGER LEVEL control between its maximum clockwise and counterclockwise positions 24 Observe that maximum signal amplitude and most stable display occurs when the displayed signal is at the approximate c...

Page 40: ...the higher sweep speeds indicated by the segmented trace 33 Select AUTO VERTICAL MODE by simultaneously pressing in both ALT and CHOP push buttons 34 Rotate the A SEC DIV switch throughout its range Note that a dual trace display is present at all sweep speeds 35 Select CH 1 VERTICAL MODE and set Channel 1 AC GND DC switch to DC Recenter the display on the screen Using the Horizontal Section 1 Ret...

Page 41: ...ontrol to its cali brated detent fully clockwise and push in the knob Using the Deiayed Sweep Controls 1 Set the A SEC DIV switch to 1 ms and the B SEC DIV switch to 0 1 ms 2 Select the A INTEN HORIZ MODE and ensure that the B DELAY TIME POSITION control is set to 0 fully counterclockwise 3 Observe that the intensified zone is approximately 1 division in length at the start of the display 4 Rotate...

Page 42: ...d signal 5 Select the A TRIGGER NORM mode 6 Rotate the A TRIGGER LEVEL control between its maximum clockwise and counterclockwise positions Observe that the display is presented when correctly triggered 7 Set the A TRIGGER COUPLING switch to DC and the A TRIGGER SOURCE switch to VERT MODE 8 Rotate the Channel 1 POSITION control until the display becomes unstable Note that changing the vertical POS...

Page 43: ...L control for a stable display 18 Set the A TRIGGER SOURCE switch to EXT MO 19 Observe that adjustment of the A TRIGGER LEVEL control provides a triggered display over a narrower range than in preceding step 17 indicating trigger signal attenuation Using the X Y Mode 1 Remove the calibration signal from the A EXT input connector and reconnect it to the CH 2 input connector Set the A TRIGGER SOURCE...

Page 44: ...ive peaks of the waveform are blanked indicating intensity modulation adjust INTEN control as necessary 5 Disconnect the 50 12 bnc cable from the Z AXIS INPUT connector and disconnect the dual input coupler from the CH 1 input connector Using the Bandwidth Limit Switch 1 Connect a fast rise output calibration signal through a 42 inch 50 12 cable and a 50 12 termination to the CH 1 input connector ...

Page 45: ...itch is OFF push button out then plug the power cord into the ac power input source outlet Push in the POWER switch ON to apply power to the instrument and allow sufficient time for warm up before starting these checks and adjustments Warm up time required to meet all the instrument s specification is 20 minutes TRACE ROTATION 1 Preset instrument controls and obtain a Norma Sweep Display refer to ...

Page 46: ... connected to the Channel 1 input connector to the AMPL CAL output 5 Using the approximately 1 kHz AMPL CAL square wave signal as the input obtain a display of the signal refer to Instrument Familiarization 6 Set the A SEC D1V switch to display several cycles of the AMPL CAL signal Use the Channel 1 POSITION control to vertically center the display 7 Check the waveform presentation for overshoot a...

Page 47: ... signal 6 Slowly adjust the FOCUS control to its optimum setting best defined display If the ASTIG adjustment is correctly set all portions of the trace will come into sharpest focus at the same position of the FOCUS control ASTIGMATISM 1 Preset instrument controls and obtain a Normal Sweep Display refer to Instrument Familiarization NOTE The setting o f the ASTIG adjustment should be correct for ...

Page 48: ...both DC 3 Connect a 10X probe to the Channel 1 input con nector and connect the probe tip to the AMPL CAL output 4 Adjust the INTEN control for desired brightness and adjust the FOCUS control for best defined display 5 Adjust the A TRIGGER LEVEL control for a stable display of the AMPL CAL signal 6 Adjust the Channel 1 POSITION control to vertically center the display 7 Check for a vertical displa...

Page 49: ...urement use the following procedure NOTE This procedure may also be used to make voltage measurements between any two points on the waveform 1 Preset instrument controls and obtain a Normal Sweep Display 2 Apply the ac signal to either vertical channel input connector and set the VERTICAL MODE switch to display the channel used 3 Set the appropriate VOLTS DIV switch to display about five divisions...

Page 50: ...te value can be obtained by measuring from the top o f a peak to the top o f a valley This will eliminate trace thickness from the measurement 9 Calculate the peak to peak voltage using the follow ing formula vertical VOLTS DIV probe Volts p p deflection x switch x attenuation divisions setting factor EXAMPLE The measured peak to peak vertical deflec tion is 4 6 divisions see Figure 12 with a VOLT...

Page 51: ...ERT switch is in its noninverting mode push button out 6 Set the AC GND DC switch to GND and position the baseline trace to a convenient reference line using the Vertical POSITION control For example if the voltage to be measured is positive position the baseline trace to the bottom graticule line If a negative voltage is to be measured position the baseline trace to the top graticule line Do not ...

Page 52: ...ge vertical deflection divisions polarity or VOLTS DIV x switch x setting probe attenuation factor EXAMPLE The measured vertical deflection from the reference line is 4 6 divisions see Figure 13 the wave form is above the reference line the VOLTS DIV switch is set to 2 and a 10X attenuator probe is being used Substituting the given values Instantaneous Voltage 4 6 div x 1 x 2 V div x 10 92 V Algeb...

Page 53: ...itch setting of 0 5 the voltage applied to that channel should not exceed approximately 4 volts c Use Channel 1 and Channel 2 POSITION control settings which most nearly position the signal on each channel to midscreen when viewed in either CH 1 or CH 2 VERTICAL MODE This ensures the greatest dynamic range for ADD mode operation d To attain similar response from each channel set both the Channel 1...

Page 54: ...d to display signals that contain undesirable frequency components These undesir able components can be eliminated through common mode rejection The precautions given under the preceding Algebraic Addition procedure should be observed EXAMPLE The signal applied to the Channel 1 input connector contains unwanted ac input power source frequency components see Figure 15A To remove the undesired compo...

Page 55: ...the Channel 2 input 4 Select ALT VERTICAL MODE and press in the CH 2 INVERT push button 5 Adjust the Channel 2 VOLTS DIV switch and VAR control so that the Channel 2 display is approxi mately the same amplitude as the undesired portion of the Channel 1 display see Figure 15A 6 Select ADD VERTICAL MODE and slightly readjust the Channel 2 VOLTS DIV VAR control for maxi mum cancellation of the undesi...

Page 56: ... A SEC DIV switch to display one complete period of the waveform Ensure that the TIME PULL VAR control is in the calibrated detent 5 Position the display to place the time measurement points on the center horizontal graticule line see Fig ure 16 6 Measure the horizontal distance between the time measurement points 7 Calculate time duration using the following formula horizontal A SEC DIV distance ...

Page 57: ...veform EXAMPLE The signal in Figure 16 has a time duration of 16 6 ms Calculating the reciprocal of time duration Frequency r 1 1 time duration 16 6 ms 60 Hz 2 Apply the signal to either vertical channel input connector and set the VERTICAL MODE switch to display the channel used 3 Set the A TRIGGER SLOPE switch to plus Use a sweep speed setting that displays several complete cycles or events if p...

Page 58: ...int on the waveform intersects the second vertical graticule line see Figure 17 point A 8 Measure the horizontal distance between the 10 and 90 points and calculate the time duration using the following formula horizontal SEC DIV distance x switch divisions setting Rise Time magnification factor EXAMPLE The horizontal distance between the 10 and 90 points is 5 divisions see Figure 17 and the A SEC...

Page 59: ... signals or select AUTO VERTICAL MODE if automatic selection is desired 7 If the two signals are of opposite polarity press in the CH 2 INVERT push button to invert the Channel 2 display signals may be of opposite polarity due to 180 phase difference if so note this for use later in the final calculation 8 Adjust the A TRIGGER LEVEL control for a stable display 9 Set the A TIME DIV switch to a swe...

Page 60: ...ing procedure Figure 18 Time difference between two time related pulses 1 Preset instrument controls and obtain a Normal Sweep Display then set the A TRIGGER SOURCE switch to CH 1 2 Set both AC GND DC switches to the same position depending on the type of coupling desired 3 Using either probes or coaxial cables with equal time delays connect a known reference signal to the Channel 1 input and the ...

Page 61: ...ust the TIME PULL VAR control so that one reference signal cycle occupies exactly 8 horizontal graticule divisions at the 50 rise time points see Figure 19 Each division of the graticule now represents 45 of the cycle 360 4 8 divisions and the horizontal graticule calibration can be stated as 45 per division 10 Measure the horizontal difference between corre sponding points on the waveforms at a c...

Page 62: ...e Difference 6 div x 4 5 div 27 Amplitude Comparison In some applications it may be necessary to establish a set of deflection factors other than those indicated by the VOLTS D1V switch settings This is useful for com paring unknown signals to a reference signal of known amplitude To accomplish this a reference signal of known amplitude is first set to an exact number of vertical divisions by adju...

Page 63: ...cal deflection to make an accurate measure ment Do not readjust the VOLTS DIV VAR control 6 Establish an arbitrary deflection factor using the following formula Arbitrary vertical VOLTS DIV Deflection conversion x switch Factor factor setting 7 Measure the vertical deflection of the unknown signal in divisions and calculate its amplitude using the following formula 4 Establish a vertical conversio...

Page 64: ...rocedure is as follows 1 Set the time duration of the reference signal to an exact number of horizontal divisions by adjusting the A SEC DIV switch and TIME PULL VAR control Arbitrary Deflection 1 5 x 1 V div 1 5 V div Factor 2 Establish a horizontal conversion factor using the following formula reference signal time duration must be known The amplitude of the unknown signal can then be deter mine...

Page 65: ...itrary deflection factor is then determined by substituting values in the formula Time Duration arbitrary deflection factor horizontal x distance divisions Arbitrary Deflection 1 37 x 50 jus div 68 5 jus div Factor 6 Frequency of the unknown signal can then be deter mined by calculating the reciprocal of its time duration The time duration of the unknown signal can then be computed by substituting...

Page 66: ...ient to place the B Sweep interval at any location within the A Sweep interval When the A INTEN HORIZ MODE is selected the B SEC DIV switch setting determines the B Sweep speed and concurrently sets the length of the intensified zone on the A trace Using delayed sweep magnification may produce a display with some slight horizontal movement pulse jitter Pulse jitter includes not only the inherent u...

Page 67: ...DIV switch to a setting which inten sifies the full portion of the A trace to be magnified The intensified zone will be displayed as the B trace The start of the intensified zone remains as previously positioned in step 5 7 Select the B HORIZ MODE to magnify the inten sified portion of the A Sweep see Figure 21B 8 The apparent sweep magnification can be calculated from the following formula Appare...

Page 68: ...INTENSIFIED ZONE A A INTENSIFIED TRACE 4 1 1 5 2 0 Figure 21 Delayed sweep magnification ...

Page 69: ... 2 Referring to Figure 22 measure the difference between Point A and Point B in divisions and calculate the pulse jitter time using the following formula Pulse horizontal B SEC DIV Jitter difference x switch Time divisions setting DELAYED SWEEP TIME MEASUREMENTS Operating the 2335 Oscilloscope with HORIZ MODE set to either A INTEN or B will permit time measurements to be made with a greater degree...

Page 70: ...form for which time duration is to be measured 5 For the most accurate measurements set the B SEC DIV switch to the fastest sweep speed that provides a usabie visible intensified zone 6 Adjust the B DELAY TIME POSITION control to move the start of the intensified zone so that it just touches the intersection of the signal and the center horizontal graticule line see Figure 23 Point A 7 Record the ...

Page 71: ...Duration 9 53 1 20 2 ms 16 66 ms Rise Time Rise time measurements use the same methods as time duration except that the measurements are made between the 10 and 90 points on the leading edge of the wave form Fail time is measured between the 90 and 10 points on the trailing edge of the waveform Figure 24 B DELAY TIME POSITION control settings 1 Preset instrument controls and obtain a Normal Sweep ...

Page 72: ...the A INTEN HORIZ DISPLAY and set the B SEC DIV switch to the fastest sweep speed that provides a usable visible intensified zone 8 Adjust the B DELAY TIME POSITION control to move the start of the intensified zone left hand edge until it just touches the intersection of the signal and the 10 graticule line see Figure 25 Point A 9 Record the B DELAY TIME POSITION control dial setting 10 Adjust the...

Page 73: ...ce a display of approximately 5 divisions in amplitude and vertically center the display 4 Set the A SEC DIV switch to display the measure ment points of interest within the graticule area 5 Select the A INTEN HORIZ MODE and set the B SEC DIV switch to the fastest sweep speed that provides a usable visible intensified zone 6 Adjust the B DELAY TIME POSITION control to move the intensified zone to ...

Page 74: ...dial setting 11 Calculate the time difference using the same formula listed in the Time Duration measurement procedure EXAMPLE For the pulses illustrated in Figure 26 the first B DELAY TIME POSITION dial setting is 1 31 and the second B DELAY TIME POSITION dial setting is 8 81 with the A SEC DiV switch set to 0 2 ps Substituting the given values in the time difference formula Time Difference 8 8 1...

Page 75: ...itch to the fastest sweep speed that provides a usable visible intensified zone 7 Adjust the B DELAY TIME POSITION control to move the intensified zone to the first pulse see Figure 27A Point A 8 Select the B HORIZ MODE and adjust the B DELAY TIME POSITION control to move the rising portion of the first pulse reference signal to a convenient vertical refer ence line see Figure 27B 9 Record the B D...

Page 76: ...surement procedure EXAMPLE With the A SEC DIV switch set to 50 fis the B DELAY TIME POSITION dial reading for the reference pulse Channel 1 is 2 60 and the dial reading for the comparison pulse Channel 2 is 7 10 Substituting the given values in the time difference formula Time Difference 7 10 2 60 50 jus 225 jus 62 2335 Operators ...

Page 77: ... see your Tektronix Catalog or contact your Tektronix Field Office or representative OPTION 03 Option 03 100 V 200 V Power Transformer permits operation of the instrument from either a 100 V or a 200 V nominal ac power input source at a line frequency from 48 Hz to 440 Hz This option does not affect the basic instrument operating instructions presented in this manual 2335 Operators 63 ...

Page 78: ...imits while items listed in the Supplemental Information column are either explanatory notes calibration setup descriptions performance characteristics for which no absolute limits are specified or characteristics that are impractical to check Environmental characteristics of the 2335 are given in Table 5 All environmental tests performed meet the requirements of M1L T 28800B Type III Class 3 equi...

Page 79: ...Uncalibrated VAR Range Continuously variable between VOLTS DiV switch settings Reduces deflection factor at least 2 5 to 1 on all VOLTS DIV switch settings Reduces deflection factor to at least 2 mV per division with VOLTS DIV switch set to 5 mV Frequency Response 6 division reference signal from a 25 f2 source centered vertically with VOLTS DIV VAR control in cali brated detent 15 C to 40 C Dc to...

Page 80: ...t 2 mV per division 3 Ac Coupled Lower 3 dB Point IX Probe 10 Hz or less 3 10X Probe 1 Hz or less 3 Step Response 5 division reference signal dc coupled at all deflection factors from a 25 0 source centered vertically with VOLTS DIV VAR control in cali brated detent BW LIMIT push button must be out for full bandwidth operation Performance requirement not checked in manual 66 2335 Operators ...

Page 81: ...40 C 3 5 ns or less Rise time is calculated from the formula f 0 35 Rise Time BW in MHz 40 C to 55 C 4 15 ns or less 3 Aberrations Positive Going Step Excluding ADD Mode 5 mV per division to 0 2 V per division 3 3 3 p p or less Negative Going Step Add 2 to all positive going step specifications checked at 5 mV per division Performance requirement not checked in manual 2335 Operators 67 ...

Page 82: ...han 5 5 5 p p checked at 5 mV per division Temperature Effect Add 0 15 per C deviation to aber rations specifications from 25 C Common Mode Rejection Ratio A t least 10 to 1 at 50 MHz for common mode signals of 6 divisions or less VAR control adjusted for best CMRR at 10 mV per division at 50 kHz checked at 10 mV per division Channel 2 Invert Trace Shift Less than 0 4 division from center screen w...

Page 83: ...0 nA or less 3 0 8 division trace shift when moving input Coupling switch from GND to AC at 5 mV per division Attenuator Isolation CH 1 to CH 2 At least 100 to 1 With one vertical input set at 0 5 V per division apply 4 V p p 25 MHz signal set the other vertical input to 10 mV per division Check for less than 4 divisions of signal POSITION Control Range At least 12 and 12 divisions from graticule ...

Page 84: ...otated from 5 mV per division to 5 V per division Double for each 10 C deviation from 25 C Chop Frequency 250 kHz 25 Input Characteristics Resistance 1 2 a Capacitance 20 pF 10 a Maximum Input Voltage DC Coupled 400 V dc peak ac or 500 V p p ac at 1 kHz or less 3 AC Coupled 400 V dc peak ac or 500 V p p ac at 1 kHz or less 3 Performance requirement not checked in manual 70 2335 Operators ...

Page 85: ... REJ Coupled Signal 0 3 division internal or 50 mV external from 50 kHz 10 kHz to 20 MHz increasing to 1 1 divisions internal or 150 mV external at 100 MHz Attenuates signals below 50 kHz 10 kHz 3 dB at 50 kHz HF REJ Coupled Signal 0 3 division internal or 50 mV external from 20 Hz 4 Hz to 50 kHz 10 kHz Attenuates signals below 20 Hz 4 Hz and above 50 kHz 10 kHz 3 dB at 20 Hz and 50 kHz DC Coupled...

Page 86: ... and at the rated trigger sensitivity VOLTS DIV VAR control must be in calibrated detent External Trigger Inputs Maximum Input Voltage 400 V dc peak ac or 500 V p p ac at 1 kHz or less 3 Input Resistance 1 MLi 10 3 Input Capacitance 20 pF 30 a LEVEL Control Range EXT A t least 1 V 2 V p p EXT r 10 A t least 10 V 20 V p p a Performance requirement not checked in manual 72 2335 Operators ...

Page 87: ...ng of Trigger Point Within 1 division of center screen Bandwidth To at least 80 MHz 4 division reference signal from a 25 0 source centered vertically Delay Difference 3 ns 2 ns 5 division signal with 5 ns rise time or less from 25 0 source centered vertically equal cable length from signal source to vertical channel and external trigger inputs terminated in 50 O at each input 2335 Operators 73 ...

Page 88: ... ns per division B Sweep 50 ms per division to 0 05 fis per division in a 1 2 5 sequence X10 MAG extends maximum sweep speed to 5 ns per division Accu racy 20 C to 30 C Unmagnified Magnified Accuracy specification applies over the full 10 divisions with X10 MAG on and off Exclude the first and last 40 ns of the sweep on all sweep speeds with X10 MAG on and off 2 3 15 C to 55 C 3 a 4 a Performance ...

Page 89: ... calibrated settings of the SEC DIV switches Extends maximum A Sweep speed to at least 1 25 s per division A Sweep Length 10 5 to 11 5 divisions Checked at 1 ms per division A Trigger Holdoff VAR A t least 2 5 times the minimum holdoff at any sweep speed 3 Magnifier Registration 0 2 division from graticule center X10 MAG onto X10 MAG off POSITION Control Range Start of sweep must position to right...

Page 90: ...05 fxs per division Exclude the first 0 25 division on all A Sweep speeds 15 C to 55 C 1 5 0 015 major dial division 3 Delay Time Jitter 0 005 of 10 times the A SEC DIV switch setting less than one part in 20 000 over the full delay time range Calibrated Delay Time Continuous from 0 05 fis to at least 5 s after start of the delaying sweep X Y OPERATION Deflection Factor Range 5 mV per division to ...

Page 91: ...st 2 MHz Y Axis Dc to at least 100 MHz Input Characteristics Resistance i ma 2 a Capacitance 20 pF 10 a Phase Difference Between X and Y Axis Amplifiers 3 from dc to 200 kHz Accuracy X Axis 0 C to 40 C 5 of indicated deflection 15 C to 55 C 8 of indicated deflection 3 Performance requirement not checked in manual 2335 Operators 77 ...

Page 92: ...lemental Information CALIBRATOR Waveshape Positive going square wave Duty Cycle 50 10 Output Voltage 0 C to 40 C 0 2 V 1 15 C to 55 C 0 2 V 1 5 a Repetition Rate 1 kHz 25 Output Impedance 200 2 1 Performance requirement not checked in manual 78 2335 Operators ...

Page 93: ...ay at normal intensity Positive going signal decreases intensity negative going signal increases intensity Usable Frequency Range Dc to 20 MHz Input Resistance 10kft 6 input Capacitance Less than 15 pF Maximum Input Voltage 25 V dc peak ac dc to 10 MHz derate above 10 MHz a V dc peak ac f in MHz Input Coupling Dc Performance requirement not checked in manual 2335 Operators 79 ...

Page 94: ...ges AC rms 115 V Nominal 100 V to 132 V 230 V Nominal 200 V to 250 V a Line Frequency 48 Hz to 440 Hz a Power Consumption Typical 35 W at 115 V 60H z a Maximum 60 W at 132 V 48 H z a Measured at worst case load and frequency VA Maximum 75 VA a Performance requirement not checked in manual 80 2335 Operators ...

Page 95: ...e 8 Trace Rotation Range Adequate to align trace with horizontal graticule lines Standard Phosphor P31 a Raster Distortion Geometry Less than 0 1 division of bowing or tilt horizontal and vertical Nominal Accelerating Voltage 18 kV a Electrode Voltages to Ground Heater Voltage Between CRT Pins 1 and 14 6 3 Vrms 0 3 V elevated to 1960 V Performance requirement not checked in manual 2335 Operators 8...

Page 96: ...um p p Ripple High Voltage Oscillator Frequency p p Ripple Low Vo Itage Supply Accuracy 20 C to 30 C 1 0 V 1 2 1 mV 5 V 0 9 1 mV 5 V 0 7 1 mV 10 V 0 9 1 mV 40 V 0 2 1 mV 102 V 2 0 1 V High Voltage Supply Accuracy 20 C to 30 C 1960 V cathode 1 0 2 V 400 mV 16 kV anode 4 0 5 V 500 mV 82 2335 Operators ...

Page 97: ...rature decreased 1 C per 1 000 ft above 5 000 ft Nonoperating Storage To 50 000 ft Humidity Operating and Nonoperating 5 cycles 120 hours referenced to Ml L T 28800B Paragraph 3 9 2 2 Vibration Operating 15 minutes along each of 3 major axes at a total displacement of 0 025 inch p p 4 g at 55 Hz with frequency varied from 10 Hz to 55 Hz to 10 Hz in 1 minute sweeps Hold 10 minutes at each major res...

Page 98: ...ocks per axis in each direction for a total of 18 shocks EMI Will meet MIL STD 461A requirements using procedures outlined in MiL STD 462 except where 10 V m is used in place of 1 V m Transportation Meets the limits of National Safe Transit Association test procedure 1A B with a 36 inch drop 84 2335 Operators ...

Page 99: ...cessories and Accessory Pouch 7 7 kg 17 0 lb Shipping Weight Domestic 10 7 kg 23 5 lb Export 14 8 kg 32 5 lb Height With Feet and Pouch 210 mm 8 3 in Without Pouch 135 mm 5 3 in Width With Handle 315 mm 12 4 in Without Handle 274 mm 10 8 in Depth With Front Cover 432 mm 17 0 in With Handle Extended 527 mm 20 8 in 2335 Operators 85 ...

Page 100: ...ORMER OPTION 03 Voltage Ranges AC rms 100 V Nominal 90 V to 115 V a 200 V Nominal 180 V to 230 V a Line Frequency 48 Hz to 440 Hz a Power Consumption Typical 35 Wat 100 V 60 Hz a Maximum 60 W at 115 V 48 Hz a Measured at worst case load and frequency VA Maximum 75 VA a Performance requirement not checked in manual 86 2335 Operators ...

Page 101: ...1 0104 07 1 Accessory Pouch Zip Lock 016 0537 00 Option A3 2 5 meter length 161 0104 05 1 Operators Manual 070 4115 00 Option A4 2 5 meter length 161 0104 08 1 Service Manual 070 4116 00 2 Fuses 1 0 A AGC Fast Blow 159 0022 00 1 Fuse 0 5 A AGC Fast Blow 159 0025 00 1 Crt Filter Blue Plastic installed 337 2760 00 1 Crt Filter Clear Plastic 337 2781 00 1 Detachable Power Cord installed 161 0104 00 2...

Page 102: ...115 V 230V 230 V 200 V to 250 V OPTION A2 UK 240 V 13 A 0 5 A 5 X 20 mm 5 X 20 mm 115 V 230 V 230 V 200 V to 250 V OPTION A3 AUSTRALIA 240 V 10 A 0 5 A 5 X 20 mm 5 X 20 mm 115 V 230 V 230 V 200 V to 250 V OPTION A4 NORTH AMERICA 240 V 15 A 0 5 A FB AGC 3AG AGC 3AG 115 V 230 V 230 V 200 V to 250 V OPTION 03 JAPAN STANDARD 100 V 1 0 A FB AGC 3AG AGC 3AG 100 V 200 V marked on cabinet 100 V 90 V to 11...

Page 103: ......

Page 104: ...NOTES ...

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Tektronix 2335, Instruction Manual, Page: 30 / 104

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Summary of Contents for 2335

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