Tektronix 502 series Instruction Manual Download Page 75

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(28U) C 480

[ D - 1 5 0 A D J

(27U) C 4 8 9

(27U) C 4 7 0

(21 U) C 4 1 0

(22U) C 4 4 0

(32) STABILITY ADJUST

G A IN ADJ

(20U ) .2 M V /C M G A IN ADJ

(29U ) FEEDBACK BAL

(17U) .2 V /C M DIFF BAL

(20U) .2 M V /C M G A IN ADJ

(16U) DC BAL

(19U ) .2 V / C M

(30) G A IN A D J FOR HO RIZ M O DE

NOTE

The numbers in parenthesis in the call-outs indicate the partic

ular step in the Recalibration Procedure when the control is set.

The letters L and U following the step number indicate whether

the adjustment is for the Upper-Beam Amplifier or for the Lower-

Beam Amplifier.

(23U ) C 4 0 6 A

(23U ) C 4 0 6 C

(24U) C 4 0 6 G

(24U) C 406J

(26U) C 4 ^

Fig 6-14 Type 502 Oscilloscope, right and left views show

ing the location of Recalibration controls.

Summary of Contents for 502 series

Page 1: ...INSTRUCTION MANUAL I TEKTRONIX IN C MANUFACTURERS OF CATHODE RAY AND VIDEO TEST INSTRUMENTS Sunset Highway and Barnes Road P O Box 831 Portland 7 Oregon U S A Phone CYpress 2 2611 Cables Tektronix IM 502 1 TYPE 5 0 2 SERIAL NUMBER ...

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Page 3: ...ou need repair parts for an instrument refer to the manual that belongs to that particular instrument This manual begins with a list of Specifications so that you will know the characteristics of your instrument The second section provides information on cooling and connecting the power trans former for various input voltages The third section gives you some of the principle ways in which you can ...

Page 4: ...ght 1959 by Tektronix Inc Portland Oregon Printed in the United States of America All rights reserved Contents of this publica tion may not be reproduced in any form without permission of the copy right owner ...

Page 5: ...y Functions Functional Des cription of Controls Indicators and Connectors CIRCUIT DESCRIPTION SECTION 4 Introduction Vertical Deflection Amplifiers Time Base Trigger Time Base Generator Power Supply CRT Circuit Calibrator MAINTENANCE SECTION 5 Preventive Maintenance Removal and Replace ment of Parts Replacement Parts Troubleshoot ing RECALIBRATION PROCEDURE SECTION 6 Introduction Equipment Require...

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Page 7: ...Fig 1 1 Type 502 Oscilloscope with accessories ...

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Page 9: ...ntial input rejection ratio The rejection ratios specified below apply if the signal voltage at the Input connector does not exceed specified limits The signal limits for dc coupling are 2 volts with respect to ground for settings of the SENSITIVITY con trol from 200 Av cm to 2v cm 20 volts with respect to ground for settings from 5v cm to 2v cm and 2 0 0 volts with re spect to ground for settings...

Page 10: ...ximately 70 f OTHER CHARACTERISTICS volts 50 60 cycles Power Approximately 300 watts Cathode ray tube Type T60P2 PI P7 and Pll phosphors op tional Accelerating potential 3 kv minimum Voltage calibrator Square wave output at approximately 1 kc Six calibrated voltage steps from 1 mv to 100 volts peak to peak Accuracy within 3 Graticule Edge lighted marked in 10 vertical and 10 horizontal 1 cm divisi...

Page 11: ...hen other nominal line voltage primary connections are made For maximum dependability and long life the voltage should be near the center of this range Voltages outside of these limits or poor line voltage waveforms may cause hum or jitter on the trace and may cause unstable operation Be sure to check for proper line voltage if indica tions such as these are present The Type 502 is equipped with a...

Page 12: ...irements fer m i k G Fost 0 j a cyc es us t f x g a s 1 w U g s o f o Conn c ot ed depend The manner jr C 0 A W g v For c ed 05 the tan s c non Vne H 0 2 o o y shown m Fig Pia 2 2lb r v U mP PREU wARY c n o H S ...

Page 13: ...he crt In the A B DIFF position the B input is algebraically subtracted from the A input and the difference is displayed This feature permits you to eliminate common mode signals and to observe a waveform which is peculiar to one input INPUT to A INPUT TO B liil m um l DISPLAYED WAVEFORM Fig 3 2 Rejection of a common mode signal by the differential amplifier The waveform applied to input connector...

Page 14: ...itivity When making amplitude measurements with an attenuator probe be sure to multiply the observed amplitude by the attenu ation factor of the probe marked on the probe Type P510A Probes are furnished as acces sories to the Typo 502 oscilloscope These probes are easily identified by their black molded plastic nose Connected to the input connectors of the oscilloscope these probes pre sent input ...

Page 15: ...f triggering in certain cases With external triggering the trig gering signal generally remains essentially con stant in amplitude and shape It is thereby possible to observe the shaping and amplifica tion of a signal by each stage of a circuit with out resetting the triggering controls for each observation Also time and phase relationships between the waveforms at different points in the circuit ...

Page 16: ... TRIGGER SELECTOR M A SWEEP TRIGGERS ON SLOPE TRIGGERING LEVEL Waveforms obtained with the TRIGGERING LEVEL control set in the UPPER REGION LOWER REGION TRIGGER SELECTOR UPPER REGION SWEEP TRIGGERS ON SLOPE Fig 3 4 Effects of TRIGGERING LEVEL and TRIGGER SELECTOR control settings When the TRIGGERING LEVEL control is set in the lower region the sweep is triggered on the lower por tion of the wavefo...

Page 17: ...lope If you wish to trigger the sweep on the rising positive slope portion of the triggering wave form place the TRIGGER SELECTOR switch at If you wish to trigger on the falling nega tive slope portion of the triggering waveform place the TRIGGERING SELECTOR switch at How to set the triggering level In the ac and dc triggering modes the TRIG GERING LEVEL control determines at which point on the tr...

Page 18: ...ified sweep rates are all calibrated with in 3 accuracy so long as their true time per centimeter is 1 microsecond or more Sweep speeds faster than this are uncalibrated and may be unlinear The SWEEP MAGNIFIER UNCALI BRATED indicator lamp lights whenever the maximum calibrated sweep speed is exceeded to indicate that the sweep is uncalibrated EXTERNAL HORIZONTAL INPUT On the Type 502 it is possibl...

Page 19: ...tiply the setting of the SENSITIVITY con trol by the distance measured to obtain the in dicated voltage 3 Multiply the indicated voltage by the atten uation factor of the probe you are using to obtain the true peak to peak voltage As an example of this method assume that using a 10X probe and a sensitivity of 1 volt per centimeter you measure a total vertical distance between peaks of 4 centimeter...

Page 20: ...fter setting the reference line at the bottom of the graticule you measure a distance of 8 centimeters to the point you wish to measure In this case then 8 centi meters times 2 volts per centimeter gives you an indicated voltage of 1 6 volts Since the voltage point is above the ground reference line the po larity is indicated to be positive The indicated voltage times the probes attenuation factor...

Page 21: ...ompensate for any dc unbalance in the verti cal amplifier This unbalance will be particularly noticeable on the high sensitivity ranges of the SENSITIVITY control To adjust the DC BAL con trol ground the oscilloscope input place the SENSITIVITY control at 20 VOLTS PER CM and rotate the TRIGGERING LEVEL control to the RECURRENT position Set the DC BAL control at mid range and position the sweep so ...

Page 22: ...red or from red to white by removing the graticule cover and inverting the graticule As a general rule white graticule lines are superior to red for photographic purposes Direct connection to crt plates In some applications it may be desirable to connect a signal directly to one or more sets of CLIPS TO DEFLECTION PLATE P IN S AMPLIFIER OUTPUT LEADS 1 M 1M 0 1 if NOTE TO A VO ID GROUNDING LEADS US...

Page 23: ...he hori zontal sweep is triggered This control also selects automatic triggering AUTOMATIC position or allow the sweep to free run RE CURRENT position TRIGGER SELECTOR slope Determines whether triggering occurs on the rising portion slope or on the falling portion slope of the triggering waveform TRIGGER SELECTOR Selects the triggering sig nal from the upper beam the lower beam the line or from an...

Page 24: ...ection plates SQUARE WAVE CALIBRATOR Controls the amplitude of the calibration voltage applied at the CAL OUT connector CAL OUT Output connector for the calibration voltage selected by the SQUARE WAVE CALIBRATOR switch HORIZ DEF PLATE SELECTOR In the TIME BASE AMP position this switch connects the output of the horizontal amplifier to the horizontal deflection plates for normal op eration When the...

Page 25: ...Vertical Deflection Ampli fiers It may be used to examine two waveforms simultaneously by applying input signals to both Vertical Amplifiers Both deflection amplifiers may be used in a differential mode to examine the difference between or the algebraic sum of two signals The Upper Beam Deflection Ampli fier can be connected to the horizontal deflec tion plates so that the instrument may be em plo...

Page 26: ...nce of the circuit that the attenuators become capacitance dividers For these frequencies the degree of attenuation is inversely proportional to the capacitance ratio In addition to providing the proper degree of attenuation the resistance values of the attenua tors are chosen so as to provide the same input resistance regardless of the setting of the SENSI TIVITY switch For example in the straigh...

Page 27: ...esistors With the grids of the Input Ampli fier at ground potential the cathodes will op erate very close to ground actually a couple of volts positive to bias the stage The approxi mately 150 volt drop across the 90 K cathode resistors R427 and R428 provides a constant supply of cathode current to stabilize the per formance of the 6AU6 Input Amplifier tubes In order for the Input Amplifier stage ...

Page 28: ...rigger Pickoff When internal triggering of the Time Base Generator is desired TRIGGER SELECTOR in either of the UPPER or LOWER positions a sample of the vertical output signal is used to develop the triggering pulse This sample ob tained from the plate circuit of V484B is coupled through a frequency compensated voltage di vider to V493 a cathode follower which drives the Time Base Trigger circuitr...

Page 29: ...signal must be of the same polarity as the origi nal signal at the input circuit However when it is desired to trigger the Time Base Generator on the rising or positive going portion of the triggering signal the signal at the grid of V45A must be opposite in polarity to that at the input circuit This is accomplished by placing the Slope switch in the position With this arrangement the grid of V24B...

Page 30: ...value that the tube will operate above the knee and thus over the linear region of its characteristic curve In the quiescent state the grid of the Miller Tube rests at about 2 volts There is about a 1 volt drop in the On Off Diodes about 25 volts bias on the Runup C F and about a 60 volt drop across the neon lamp This establishes a quies cent voltage of about f 32 volts at the plate of the Miller ...

Page 31: ...f and starts conducting As mentioned previously this is the action that initiates the re trace At the start of the retrace interval C l80 starts discharging through the Hold Off Resistor The time constant of this circuit is long enough however so that during the retrace interval and for a short period of time after the comple tion of the retrace Cl 80 holds the grid of V135A high enough so that it...

Page 32: ...he Vertical Amplifiers This illustrated in Fig 4 2 A nega tive feedback loop extends from the plate circuit of the Output Amplifier to the cathode circuit of the Input Amplifier The Output Amplifier on the other hand has a positive feedback loop be tween the plate circuit on one side and the grid circuit on the other The Input Amplifier is a cathode coupled para phase amplifier and converts the po...

Page 33: ...out 485 volts for the high voltage power supply for the crt It is unnecessary to regulate this supply as the high voltage power supplies have their own regulation circuits In addition to the three main power supplies a transistorized full wave supply furnishes a regu lated 6 2 volt output for the heaters in the In put Amplifier tubes in the Upper and Lower Beam Vertical Amplifiers Reference voltag...

Page 34: ...or the crt The main components of the Oscillator circuit are V800 and a portion of the primary of T801 tuned by C807 The two half wave rectifier circuits employ capacitor input filters Separate supplies are re quired for the grid and cathode circuits of the crt in order to provide dc coupled unblanking to the crt grids V822 supplies about 2900 volts for the cath odes of the crt V862 supplies about...

Page 35: ...onnector labeled CAL OUT It consists of a Multivibrator V873A V875 con nected so as to switch the cathode follower V873B between two operating states cutoff and conduction During the negative portion of the multivibra tor waveform the grid of V873B is driven well below cutoff and the cathode rests at ground potential During the positive portion of the waveform the grid rises to slightly less than ...

Page 36: ......

Page 37: ...it Therefore it is essential that you determine the cause of over heating before replacing scorched parts in order to prevent damage to the new components Recalibration The Type 502 Oscilloscope is a stable instru ment and will provide many hours of trouble free operation To insure the reliability of meas urements obtained on the 502 we suggest that you recalibrate the instrument after each 500 ho...

Page 38: ... 2 The method for removal and replacement of the crt unless they are actually defective Replacement or switching of tubes will many times necessitate recalibration of the instrument If tubes do re quire replacement it is recommended that they be replaced by previously checked high quality tubes Low noise tubes used in the instrument should be replaced by equivalent tubes Soldering Precautions In t...

Page 39: ...lace of the part ordered Your local Tektronix Field Engineering Office has knowledge of these changes and may call you if a change in your purchase order is necessary Replacement information sometimes accom panies the improved component to aid in its in stallation Duplicate Parts The Type 502 contains virtually identical verti cal amplifiers for the upper and lower beams Parts contained in both of...

Page 40: ...he Recalibration Procedure section of the manual A calibration check will not only correct any troubles due to improper calibration but will often also aid in isolating the faulty stage in cases where an actual trouble does exist After checking control settings and calibration if the trouble still exists you should then go to a more detailed troubleshooting analysis Specific troubleshooting proced...

Page 41: ...and cathode resistors These components can often be located by a visual in spection of the circuit If no damaged compo nents are apparent however it will be necessary to make measurements or other checks within the circuit to locate the trouble Troubleshooting The Low Voltage Power Supply Proper operation of every circuit in the Type 502 Oscilloscope depends on proper operation of the Low Voltage ...

Page 42: ... of the improper regulation is probably a change in value of one or more of the resistors or capacitors composing the voltage divider networks The resistance networks in the grid circuits of V746B V666B and V636A and the base circuit of V644 are particularly critical since they determine the output voltage of their respective power supplies Use resistance checks to isolate the defective part or pa...

Page 43: ...ot touch the metal frame of the instrument If possible stand on an insulated surface and use insulated tools and probes PART 1 CIRCUIT ISOLATION This portion of the Troubleshooting Procedure lists most of the troubles that can be caused by a circuit failure in the Type 502 Oscilloscope It also describes checks that can be made to isolate the faulty circuit or circuits In some cases simple front pa...

Page 44: ...e Generator connect a jumper from an input of the oscilloscope to pin 3 of V I61 being careful that the lead does not touch the chassis at any time Set the SENSI TIVITY control at 20 volts per cm and rotate the TRIGGERING LEVEL control fully clockwise to the RECURRENT position Set the TIME CM switch at 1 MILLISEC You should then obtain a stable diagonal trace This trace represents a plot of the ou...

Page 45: ...e sweep should appear on the crt If the sweep does not appear the trigger multivibrator is defective If the sweep does appear either the trigger amplifier or the trigger multivibrator may be at fault A check on the trigger amplifier circuit may be made as follows With the TRIGGERING LEVEL control still in the AUTOMATIC position measure the voltage at the plate pin 6 of V24B This voltage should be ...

Page 46: ...5A should be sufficient to reset the multivibrator more positive than 35 volts If this is so and the multivibrator still does not reset the trouble must lie in that stage Check the voltages at the plates of V135A V135B and V I45A and the resistors in the cathode circuit of V135B 2 Low voltage Low voltage at the plate of the Miller tube indicates that the tube is conducting quite heavily and is not...

Page 47: ...ies and the circuit is still not operat ing correctly check the voltage dividers which control the intensity and focus of the beams If these are also normal the trouble will likely be the crt itself or its cathode circuit Badly mis focused and distorted displays can be caused by Fig 5 5 Checking operation of the high voltage oscil lator circuit by means of a neon bulb placed in the field of the hi...

Page 48: ...l the Vertical Amplifier can usually be recalibrated for gain Refer to the Recalibration Procedure for this If the change in gain is more pronounced or if there is no vertical deflection at all the tubes should be first checked Then check for com ponents which will affect the gain of both sides of the amplifier without unbalancing the ampli fier Such parts are common cathode resistors in the diffe...

Page 49: ... the cathode and plate circuits For insufficient or no horizontal deflection If the gain of the Horizontal Amplifier de creases the trace will not extend to the left and right sides of the crt screen In addition the sweep timing will no longer be calibrated on any range of the TIME CM switch If the change in sweep timing and sweep length is slight it may be possible to correct this trouble by ad j...

Page 50: ......

Page 51: ... particular control is known it can often be adjusted without necessitating a recalibration of the entire instrument provided the control does not interact with other adjustments In such cases the control is adjusted in the normal man ner as described in the applicable step of the Recalibration Procedure It will be necessary however for you to refer to the recalibration steps immediately preceding...

Page 52: ...ts During recalibration periodically check the input voltage to the instrument and adjust the autotransformer as necessary to main tain the voltage at 117 or 234 volts except when the power supply regulation is being checked CAUTION Do not reset the 150 ADJ control unless the power supply voltages are actually out of tolerance or you are planning to perform a complete recalibration of the instrume...

Page 53: ...parallel to the horizontal divisions of the graticule Push the crt forward against the graticule and tighten the crt clamp 5 GEOM ADJ Place both Input Selector switches in the A DC position and connect 1 millisecond time markers to both A inputs Ro tate the TIME CM control to the 1 MILLISEC posi tion and the HORIZONTAL DISPLAY switch to the NORMAL XI position Adjust the two SENSITIVITY controls so...

Page 54: ...Set the HORIZONTAL DISPLAY switch at NORMAL XI and apply 1 millisecond markers to the upper beam vertical input Adjust the XI CAL control for one 1 millisecond marker per centimeter Disconnect the markers 10 NORM MAG REGIS Place the HORIZON TAL DISPLAY switch in the X20 position and posi tion the start of the upper trace under the verti cal centerline of the graticule Rotate the HORI ZONTAL DISPLA...

Page 55: ... trace does not shift vertically as the SENSITIVITY switch is rotated between the 5 VOLTS PER CM and 2 VOLTS PER CM positions A Fig 6 7 Adjustment of the 2M V CM If Ihe 2M V CM DIFF BAL control similar to waveform A will be obtain play obtained when the control is adju 16 DC BAL Leave the vertical input terminal grounded as in step 15 After adjusting the COARSE DC BAL control rotate the SENSITIVIT...

Page 56: ...ted to obtain waveforms having a minimum of distor tion Waveform C shows the display obtained with properly adjusted capacitors 21 C410 Apply 1 kc square waves from the Type 105 Square Wave Generator to input con nector A of the vertical amplifier through the CS47 Capacitance Standardizer Place the SENSITIVITY switch in the 2 VOLTS PER CM position Adjust C410 for an undistorted square wave 22 C440...

Page 57: ... least distorted square wave for both the A DC and B DC positions of the Input Selector switch 30 GAIN ADJ FOR HORIZ MODE Place the HORIZ DEF PLATE SELECTOR switch in the UPPER BEAM AMP position and place the UPPER BEAM SENSITIVITY switch in the 1 VOLTS PER CM position Place the Input Selector switch in the A DC position and connect 10 volts of Cali brator signal to the A input connector of the up...

Page 58: ...positions of the TRIGGER SELECTOR Slope switch Fig 6 12 Adjustment o f the STABILITY ADJUST con trol The STABILITY ADJUST control is set for a meter read ing that is midway between the reading obtained when the trace first appears and the reading obtained when the trace brightens 34 Lower Beam DC TRIG ADJ Leave the jumper connected as in step 33 Place the Lower Beam Input Selector switch in the A ...

Page 59: ...ed 500 v 5 283 534 C160C 4 5 25 f x x f Cer Var 500 v 281 010 C160D 001 f x f m i i Special Timing Series Manufactured by Tektronix L 1out n A O F U1f X 1 nf i V Order replacements from the factory or through 291 007 L 1 our C160G f X T 1 xf your Tektronix Field Engineer Cl 67 001 xf Cer Fixed 500 v 283 000 C180A 82 f x f x f Cer Fixed 500 v 10 281 528 C180B 001 xf PTM Fixed 600 v 285 501 C180C 01...

Page 60: ...5 C645 6 25 if EMT Fixed 300 v 2 0 50 290 025 C652 2x40 if EMC Fixed 450 v 2 0 50 290 043 C671 01 if PTM Fixed 400 v 285 510 C685 6 25 i f EMT Fixed 300 v 290 025 C686 6 25 if EMT Fixed 300 v 290 025 C722 2x40 if EMC Fixed 450 v 290 042 C751 01 if PTM Fixed 600 v 285 511 C757A B 2x20 if EMC Fixed 450 v 290 037 C765A B 2x20 if EMC Fixed 450 v 290 037 C800 001 if PTM Fixed 600 v 285 501 C805 01 if P...

Page 61: ... Comp 10 306 223 R39 400 k y2w Fixed Film i 309 126 R42 1000 Vi w Fixed Comp 10 302 101 R44 390 k Vi w Fixed Film i 309 056 R47 2 7 k y2w Fixed Comp 5 301 272 R48 680 0 y2w Fixed Comp 10 302 681 R 51 3 9 k y2w Fixed Comp 10 302 392 R ill 250 k 2 w Var Comp 311 032 R114 100 k y2w Fixed Comp 10 302 104 R126 100 k y2w Fixed Comp 10 302 104 R129 27 k V i w Fixed Comp 5 301 273 R130 47 k y2w Fixed Comp...

Page 62: ...R331A 50 k y2w Fixed Film 1 309 090 R331C 12 5 k y2w Fixed Film 1 309 228 R331E 5 55 k y2w Fixed Film 1 309 229 R331G 2 63 k y2w Fixed Film 1 309 230 R331J 16 69 k y2w Fixed Film 1 309 231 R331M 100 k y2w Fixed Comp 10 302 104 R331N 100 k y2w Fixed Comp 10 302 104 R334 154 k y2w Fixed Film 1 309 234 R336 56 5 k 1 w Fixed Film 1 310 065 R337 10 k 2 w Var Comp 20 311 0 6 R338 50 k 1 w Fixed Film 1 3...

Page 63: ...309 203 R408E 1 28 k y2w Fixed Film 1 309 241 R408F 2 63 k y2w Fixed Film 1 309 230 R408G 5 55 k Vi w Fixed Film 1 309 229 R408H 16 69 k Vi W Fixed Film 1 309 231 R408J 50 k Vi w Fixed Film 1 309 090 R408K 193 k y2w Fixed Film 1 309 243 R410 1 meg y2w Fixed Film 1 309 014 R411 1 k y2w Fixed Comp 10 302 102 R413 560 k y2w Fixed Comp 10 301 564 R414 150 k y2w Fixed Film 1 309 049 R420 1 2 meg Vi w F...

Page 64: ...73 R476t 18k y2w Fixed Comp 5 301 183 R477t 20 k 8 w Fixed WW 5 308 011 R480t 90 k y2w Fixed Film 1 309 195 R481t 1 k y2w Fixed Comp 10 302 102 R482t 22 k 1 w Fixed Comp 10 304 223 R483t 1 k y2w Fixed Comp 10 302 102 R484t 27 k 2 w Fixed Comp 5 305 273 R486t 18k y2w Fixed Comp 5 301 183 R488t 2 5 k 0 2 w Var Comp 20 311 120 R489 5k 0 2 w Var Comp 20 311 067 R490 68 k y2w Fixed Comp 10 302 683 R491...

Page 65: ...2w Fixed y2w Fixed y2w Fixed y2w Fixed 1 w Fixed 1 w Fixed y2w Fixed y2w Fixed y2w Fixed y2w Fixed 1w Fixed y2w Fixed y2w Fixed 20 w Fixed y2w Fixed y2w Fixed 1 w Fixed y2w Fixed y2w Fixed 2 w Fixed y2w Fixed y2w Fixed PARTS LIST Comp 10 Comp 10 Comp 10 Comp 10 WW 5 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Film 1 Film 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 10 Comp 1...

Page 66: ...862 2 meg 2 w Var Comp 311 043 R864 56 k y2w Fixed Comp 10 302 563 R866 1 meg y2w Fixed Comp 10 302 105 R868 1 meg Vi W Fixed Comp 10 302 105 R870 150 k Vi w Fixed Comp 10 302 154 R871 3 3 meg Vi w Fixed Comp 10 302 335 R872 1 k y2w Fixed Comp 10 302 102 R874 68 k y2w Fixed Comp 10 302 683 R875 2 2 meg y2w Fixed Comp 10 302 225 R876 1 k y2w Fixed Comp 10 302 102 R878 33 k 1 w Fixed Comp 10 304 333...

Page 67: ...art Number T602 L V Power Transformer 120 117 T801 H V Transformer 120 114 Tektronix VACUUM TUBES Part Number V24A B 6DJ8 154 187 V45A B 6DJ8 154 187 VI 35A B 6AN8 154 078 VI45A B 6AN8 154 078 V I52 6AL5 154 016 V I61A B 6AN8 154 0T6 VI 83A B 6DJ8 154 187 V324 6AU6 154 022 V354 6AU6 154 022 V364A B 6DJ8 154 187 V414t 6AU6 Selected 7 7 T54 056 V444t 6AU6 Selected j 7 T54 056 V454t 6AU6 154 022 V464...

Page 68: ...istor 151 001 V652 6BW4 154 119 V66A B 6AN8 154 078 V677 12B4 154 044 V722 5AR4 154 168 V746A B 6AN8 154 168 V747 12B4 154 044 V757 12B4 154 044 V800 6CZ5 154 167 V814A B 12AU7 154 041 V822 5642 154 051 V859 T66P2 CRT 154 144 V862 5642 154 051 V873A B 6AN8 154 078 V875 6AU6 154 022 PARTS LIST TYPE 502 7 10 ...

Page 69: ... Graticule cover Graticule 10 div vert x 10 div horiz double base line Graticule light filter green Graticule light shield Graticule mounting nut knurled Graticule spacer neoprene washer Ground strap CRT cathode Holder neon double Holder neon single Knob black TRIGGER SELECTOR HORIZONTAL DISPLAY HORIZ POSITION SQUARE WAVE CALIBRATOR VERT AC DC Knob black FOCUS INTENSITY SCALE ILLUM TRIGGERING LEVE...

Page 70: ... coax UHF modified A B CAL OUT 131 064 Receptacle insulator nylon 406 244 Receptacle washer fiber 210 812 Ring CRT alignment 354 066 Rod coupling 3 4 376 005 Rod extension alum 1 4 x9 15 16 384 545 Rod extension alum 4 x 12 7 16 384 546 Rod extension alum V4 x 14 384 547 Socket graticule light 136 035 Socket transistor 4 pin 136 050 Socket STM7G 7 pin 136 008 Socket 7 pin shielded 136 010 Socket S...

Page 71: ... Receptacle Neon Holders Fuse Holder Binding Posts and CRT Cathode Ground Strap l T T V V V Y V I T T n r r r r r r n r J V 124 066 124 065 124 071 124 012 124 016 129 009 rrrrrrri rrri Ceramic Strips and Ceramic Post MISC PARTS TYPE 502 7 13 ...

Page 72: ...CRT Alignment Ring Graticule Light CRT Tube and Transistor Sockets Grounding Assy Tips and Clip Assy for Probes Coax Receptacle Assy Control Rod Coupling and Shockmounts 7 14 MISC PARTS TYPE 502 ...

Page 73: ...or the Upper Beam Amplifier or for the Lower Beam Amplifier Fig 6 13 Type 502 Oscilloscope top and bottom views showing the location of Recalibration controls 23L C 4 0 6 C 23 L C 4 0 6 A 6 A 31 TRIG LEVE 24 L C406J 24L C 4 0 6 G 29L FEEDBACK BAL 17L 2 V C M DIFF BAL 18L 2 M V C M DIFF BAL 21L C410 26L C407J 34L DC TRIG ADJ 19L 2 V CM GAIN ADJ 20L 2 M V CM GAIN 22L C 4 4 0 27L C470 28L C480 ADJ 25...

Page 74: ... d 22L C440 11 EXT HORIZ AMPL DC BAL 10 NO RM M AG REGIS 35 SWP LENGTH 5 GEOM ADJ 6 ASTIG LOWER 6 ASTIG UPPER 31 TRIG LEVEL CENT I 9 X I CAL j 8 X20 CAL 12 C 311 7 INT BAL 3 H V ADJ Fig 6 13 Type 502 Oscilloscope top and bottom views showing the location of Recalibration controls TOP AND BOTTOM VlEW ...

Page 75: ...MODE NOTE The numbers in parenthesis in the call outs indicate the partic ular step in the Recalibration Procedure when the control is set The letters L and U following the step number indicate whether the adjustment is for the Upper Beam Amplifier or for the Lower Beam Amplifier 23U C 406A 23U C406C 24U C406G 24U C406J 26U C4 Fig 6 14 Type 502 Oscilloscope right and left views show ing the locati...

Page 76: ... J DC BAL DC BAL 23U C 406A 23 U C406C 24U C406G 24U C406J 26Uj 2 CAL ADJ 25U C 407A 25U C407C 13 C160C Fig 6 14 Type 502 Oscilloscope right and left views show ing the location of Recalibration controls SiDE VIEW ...

Page 77: ...0 0 TYPE 502 OSCILLOSCOPE A BLOCK DIAGRAM ...

Page 78: ... input resistance of 11 megohms The wave forms shown were reproduced from actual photo graphs There w ill be considerable variation between instruments because of normal manufacturing toler ances and vacuum tube characteristics Therefore the significance of any discrepancies observed should be determined by referring to the circuit diagram A ll readings are in volts unless otherwise specified Wher...

Page 79: ...INPUT A M PLIFIE R SECOND D R IV E R O UTPUT A M PLIFIE R C F S AM PLIFIE R X 10 X 100 ...

Page 80: ... the significance of any discrepancies observed should be determined by referring to the circuit diagram All readings are in volts unless otherwise specified W here two voltage readings are given they represent the voltage as read by a voltmeter under two sets of conditions and as such do not indicate the peak to peak excursion of voltage at the point CIO 01 C11 001 MODIFICATION NOTICE FOR TYPE 50...

Page 81: ... PIN 7 V 493 INTERNAL TRIG C F INTERNAL TRIli r r LOV ER BEAMVERT AMP L O AC j INPUT 1 Y MODIFIED INSi kUMENT The instrument for which this manual was prepared has bean modified A special sheet has been inserted in the manual containing information relative to this section TIME BASE TRIGGER TYPE 502 OSCILLOSCOPE A ...

Page 82: ...V722 type 502 o s c illo s c o p e HEATER WIRING DIAGRAM A POWER SUPPLY ...

Page 83: ...en instrum ents because of normal manufacturing toler ances and vacuum tube characteristics Therefore the significance of any discrepancies observed should be determined by referring to the circuit diagram All readings are in volts unless otherwise specified W here two voltage readings are given they represent the voltage as read by a voltmeter under two sets of conditions and as such do not indic...

Page 84: ...T801 TRANSFO RM ER CONNECTIONS Sea parts list for late o o rnp on en t va lue ch a n g e s TYPE 502 OSCILLOSCOPE A CRT CIRCUIT ...

Page 85: ...a u s e o f n o r m a l m a n u f a c t u r i n g t o l e r a n c e s a n d v a c u u m t u b d c h a r a c t e r i s t i c s T h e r e f o r e t h e s i g n i f i c a n c e o f a n y d i s c r e p a n c i e s o b s e r v e d s h o u l d b e d e t e r m i n e d b y r e f e r r i n g t o t h e c i r c u i t d i a g r a m A l l r e a d i n g s a r e i n v o l t s u n l e s s o t h e r w i s e s p e ...

Page 86: ...IC HORIZONTAL POSITION FO R LO W ER VOLTAGE READING S FU LL R IG H T FO R U P P E RVOLTAGE READINGS F U LL L E F T S E E ALSO 2F R TIM E BA SE GEN DIAG L S W E EPMAGNIFIER ON UNCALIBRATED r o l c 100 K j E X T VOLTS CM _____Ihorizontal I D IS PLA Y 1 S E E I SW ITCHING I detail R331 ATL E F T R33 M A G R E G IS 100V io I 150V o r POSITION 2R35 V364B a6DJ8 l j See parts list tor late co m p o n e n...

Page 87: ...n instrum ents because of normal m anufacturing toler ances and vacuum tube characteristics Therefore the significance of any discrepancies observed should be determined by referring to the circuit diagram All readings are in volts unless otherwise specified W here two voltage readings are given they represent the voltage as read by a voltmeter under two sets of conditions and as such do not indic...

Page 88: ...en instrum ents because of normal manufacturing toler ances and vacuum tube characteristics Therefore the significance of any discrepancies observed should be determined by referring to the circuit diagram All readings are in volts unless otherwise specified W here two voltage readings are given they represent the voltage as read by a voltmeter under two sets of conditions and as such do not indic...

Page 89: ...SW EEP GATING M ULTIVIBRATO R CO NTROL S E EALSO AUTOMATIC TRIGGERING CO NTROL TIM E BASETRIG DIAG TYPE 502 OSCILLOSCOPE ...

Page 90: ...M ILLE RRUNUP CIRCU IT 350 V 2 3 M ILUSEC TIME BASE GENERATOR 12 8 58 ...

Page 91: ...whitel Red on white 1 Orange on White Yellow on White R160E R160F R160G l C160A C160D R160A 3 F R 4 F R C180C Cl SOD R180A R180B Cl 81 C180A C180B Cl 60 Orange on white Cl 60E Yellow on white Cl60F Violet on White C l60G Green on White SW160 TIME CM SWITCH Right side View ...

Page 92: ... TIMING RESISTORS TIMING CAPACITORS H HOLD OFF CAPACITORS RESISTORS SW 160 TIME CM 4R 4F R TYPE 502 OSCILLOSCOPE A TIMING SWITCH ...

Page 93: ...w ill be considerable variation between instruments because of normal manufacturing toler ances and vacuum tube characteristics Therefore the significance of any discrepancies observed should be determined by referring to the circuit diagram A ll readings are in volts unless otherwise specified Where two voltage readings are given they represent the voltage as read by a voltmeter under two sets of...

Page 94: ...CALIBRATOR MULTIVIBRATOR TYPE 502 OSCILLOSCOPE A ...

Page 95: ...INGS WERE OBTAINED WITH CONTROLS SETAS FOLLOWS SQUARE WAVE CALIBRATOR 100 V VOLTAGE READINGS MAY VARY WITH CALIBRATOR DUTY CYCLE V873B V 2 6 A N 8 n P ICAL OUTI R899 See parts list for late component value changes CALIBRATOR 12 8 58 2 0 6 ...

Page 96: ...ed 2 7 k has a resistance of 2 00 ohms The symbol M stands for million For example a resistor marked 5 6 M has a resistance of 5 6 megohms Unless otherwise specified on the circuit diagram capacitance values mark ed with the number 1 and numbers greater than 1 are in ifxt For example a capacitor marked 3 3 would have a capacitance of 3 3 micromicrofarads Capacitance values marked with a number les...

Page 97: ...ible All Tektronix instrum ents are fully guaranteed against defective m aterials and workmanship for one year Should replacement parts be required whether at no charge under w arranty or at established net prices notify us promptly including sufficient details to identify the required parts W e will ship them pre paid via air if requested as soon as possible usually within 24 hours Tektronix tran...

Page 98: ...E IN P U T 10 M E G S H U N TE D BY Zjj jju W H E N C A B LE IS T E R M IN A T E D W IT H A O jJ JJ lr I 1 _ T I V Rp 9 M 1 _L r i Cp i zJJ JX C E R V A R 6 0 0 V Rp 9 M EG W F IX E D P R E C l 7o R B H 1 1 B 5 5 T E K T R O N I X T Y P E PE IOA P R O B E ...

Page 99: ...io range for example observing hum levels transducer pre amplifier and other low level applications where a gain of 1 0 0 is desired CHARACTERISTICS Voltage Gain Gain is 100 adjustable with screw driver calibration control Passband Within 3 db from 3 cycles to 25 kc Within 2 from 15 cycles to 6 kc Battery Powered A small mercury cell supplies the filament voltage and a miniature 30 v battery is th...

Page 100: ...f the gate Time marker intervals are 1 xsec 0 1 xsec 0 05 xsec and 0 005 H 200 per television line Amplitude is continuously variable from zero to 30 v Phase control permits posi tioning the markers on the trace To make use of the time marker output of the Type 124 the oscilloscope should have a positive gate output and a CRT cathode terminal VACUUM TUBE COMPLEMENT Trigger inverter and output C F ...

Page 101: ...o house both the Type 126 and the powered unit A Type 126 Power Supply combined with a Type 360 Indicator makes a practical compact slave unit for any Tektronix oscilloscope The oscilloscope has the neces sary sweep sawtooth and unblanking pulse for the Type 360 Indicator available at front panel connectors VACUUM TUBE COMPLEMENT Rectifiers 2 6BW4 Regulator am p lifier 6 AU6 Regulator amplifier an...

Page 102: ... Dimensions are I 8 V2 wide 39 high and 30 deep 97 50 The Tektronix Type 5 0 0 53 Scope Mobile is the Type 500 with a Type 53 Scope Mobile front panel installed This front panel has two supporting cradles to accommo date the Type 53 and 5 3 5 4 Plug In Preamplifiers used in the Type 530 and Type 540 Series Oscilloscopes In all other characteristics the Type 5 0 0 53 is identical to the Type 5 0 0 ...

Page 103: ...ratio 1 5 w 8 50 B52 75L Minimum loss pad 52 ohms to 75 o h m s 11 50 B52 170L Minimum loss pad 52 ohms to 170 oh m s 11 50 B52 T10 52 ohm T pad 10 to 1 voltage ratio 1 5 w 11 50 B75 R 75 ohm terminating resistor 1 5 w 8 50 011 023 75 ohm terminating resistor for Type 525 0 5 w 4 00 B75 L5 75 ohm T pad 5 to 1 voltage ratio 1 5 w 8 50 B75 L10 75 ohm L pad 10 to 1 voltage ratio 1 5 w 8 50 B75 T10 75...

Page 104: ...strength fiberglass reinforced alkyd and has an internal brass shield Two interchangeable Tek tips a straight tip and a hooked tip and an alligator clip assembly are furnished Probe has a 42 cable with co axial connector and is rated at 600 v peak to peak P 5 1 0 A 8 50 P170CF Cathode Follower Probe was developed for use with the Type 517 Oscilloscope The cathode fol lower tube is a 5718 triode wh...

Page 105: ... side pocket of Type 310 carrying case Tek no 01 6 0 1 0 3 50 DP 52 Deflection Plate Connector for Type 530 and 540 Series Oscilloscopes A convenient means of making a connection directly to the cathode ray tube vertical deflection plates Function of the vertical positioning control is still retained The connector is designed for use with a 52 ohm cable For instruments with serial numbers below 50...

Page 106: ...ed ance 42 lo n g 4 00 P93 Coaxial cable 93 ohms nominal imped ance 42 lo n g 4 00 P93A Coaxial output cable 93 ohms termin ated with variable attenuator 42 long 13 50 P93B Coaxial output cable 93 ohms termin ated with Vi watt 93 ohm resistor 42 long 5 00 PI 70 Coaxial cable 170 ohms nominal imped ance 42 lo n g 9 50 MISCELLANEOUS A100 Adapter clip lead 2 00 A510 Adapter binding post 2 00 FA160 Fr...

Page 107: ...y this portion should be used in tran sient response testing V A C U U M TUBE COMPLEMENT Multivibrator 6BQ7A A m p lifier 12BY7 Shaper am p lifier 12BY7 Driver am p lifier 12BY7 Output amplifier 6 AU6 Rectifiers 2 6BW4 Output voltage regulator OA2 CHARACTERISTICS Risetime Less than 3 millimicroseconds when the output 52 ohm cable is terminated Frequency Range A front panel control varies the frequ...

Page 108: ...he Type 530 and Type 540 Series Oscilloscopes to be operated partially out of its housing 5 00 013 005 EP53A Gain Set Adapter Permits an ex ternal calibrating signal to bypass the plug in preampli fier for calibrating the sensitivity of the main amplifier of Type 530 and 540 Series Oscilloscopes 5 00 011 021 CS 47 Input Capacitance Standardizer For use with Type 53 and Type 5 3 5 4 Plug In Preampl...

Page 109: ...ally for Type 5 7 0 1 50 CATHODE RAY TUBE LIGHT FILTERS 378 511 3 Amber for Type 310 and 3 6 0 50 378 509 3 Green for Type 310 and 3 6 0 50 378 510 3 Blue for Type 310 and 3 6 0 50 378 506 3 Amber for Type 3 1 5 D 50 378 505 3 Green for Type 315 D 50 378 507 3 Blue for Type 315 D 50 378 501 F510 3 5 Amber 90 378 503 F510 5 5 Green 90 378 504 F510 6 5 Blue 90 AC POWER CORDS 161 004 COP 16 8 No 16 w...

Page 110: ... 4 00 3 1 6 4 00 360 1 75 511A or 511 A D 2 75 512 2 75 513 or 513D 2 75 514 or 514D 2 75 514A or 514AD 3 00 515 4 00 517 or 517 A 4 50 524D or 524AD 5 00 525 4 50 531 4 50 532 4 50 535 5 00 536 5 00 541 4 50 545 5 00 53A or 5 3 5 4 A 1 50 53B or 5 3 5 4 B 1 50 53C or 5 3 5 4 C 1 50 53 54D 1 50 53 54E 1 50 53G or 5 3 5 4 G 1 50 53 54K 1 50 5 3 5 4 L 1 50 5 3 5 4 T 1 50 570 4 50 575 5 00 A l 2 T ek...

Page 111: ...72 24 49 22 7 190A 24 35 55 25 5 310 23 72 30 49 22 4 316 35 47 65 30 4 360 9 17 32 15 4 515 40 66 88 40 7 517A Indicator Unit 76 101 127 58 9 Power Supply 72 83 105 48 5 Scopemobile 42 62 67 30 7 524AD 61 84 117 53 8 Viewing Hood 174 4 11 5 1 525 54 86 101 46 9 531 61 72 80 105 48 8 532 52 73 94 43 8 535 65 85 110 50 8 536 57 83 103 47 8 541 61 72 80 103 47 8 545 65 85 m 50 8 53 54A 3 72 10 12 5 ...

Page 112: ...ng sufficient details to identify the required parts We will ship them transportation paid via air to meet emergencies if requested as soon as possible usually within 24 hours Requests for repairs or replacement parts should in clude type number and serial number and should be directed to the Tektronix Field Office or Representative in your area In an emergency please wire or phone Field Engineeri...

Page 113: ...elephone discussion with him will help you get your instru ment back into operation with minimum delay If yours is a large laboratory your Field Engineer can be of service to your maintenance engineers by conducting informal classes on test and calibration procedures trouble shooting techniques and general maintenance IM 7 T ektro nix Inc If you are responsible for the maintenance of a large quant...

Page 114: ...G e re n c ia 3 1 3 9 9 0 AUSTRALIA Electronic Industries Imports Pty Ltd 90 G rote St A d ela id e S A A u s t r a lia L A 5 2 9 5 Electronic Industries Imports Pty Ltd 52 Bowen St Brisbane Q ld A u s tr a lia B 6 4 6 2 Electronic Industries Imports Pty Ltd 139 1 43 Bouverie St C arlton N 3 M elb o u rn e A ustralia F J 4161 8 Electronic Industries Imports Pty Ltd 68 R ailw ay Pde W est Perth W A...

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Tektronix 502 series, Instruction Manual

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