Tektronix 3B5 Instruction Manual Download Page 4

Page: 4 / 187

Fig.

1-1. Type 3B5 Automatic/Programmable Time Base unit.

Type

3B5

Summary of Contents for 3B5

Page 1: ...NSTRUCTION MANUAL Serial Number_____________ TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE Tektronix Inc S W Millikan Way P O Box 500 Beaverton Oregon 97005 Phone 644 0161 Cables Tektronix 070 0538 00 666...

Page 2: ...e all requests for repairs and re placement parts should be directed to the Tektronix Field Office or representative in your area This procedure will assure you the fastest possible service Please inc...

Page 3: ...ion 7 Electrical Parts List Mechanical Parts List Information Section 8 Mechanical Parts List I j Section 9 Diagrams Mechanical Parts List Illustrations Accessories this manual Abbreviations and symbo...

Page 4: ...Fig 1 1 Type 3B5 Automatic Programmable Time Base unit Type 3B5...

Page 5: ...ed for reference use and do not directly reflect the measurement capabilities of this instrument The Performance Check procedure given in Section 5 of this manual provides a convenient method of check...

Page 6: ...agnified with the Delayed Sweep Magnifier Calibrated DELAY control selects portion to be magnified Basic sweep rates between 5 s and 10 s can be magnified 100 times basic sweep rates between 5 s and 1...

Page 7: ...yed Sweep Magnifier OFF Terminal 33 X10 Terminal 34 X100 Terminal 36 Grounding zero volt digital logic to given terminal of PROGRAM connector activates function Magnifier Delay Analog current change b...

Page 8: ...ith the frequency varied from 10 50 10 c s in one minute cycles Hold at any resonant point for three minutes If no resonant points are found vibrate at 51 c s for three minutes on each axis Instrument...

Page 9: ...pe Whenever the Type 3B5 is transferred from one oscillo scope to another the sweep calibration should be checked and adjusted if necessary to provide accurate measurements with the complete system Se...

Page 10: ...Operating Instructions Type 3B5 Fig 2 1 Front panel controls and connectors of the Type 3B5 I I I I I I I I I I I I I I I I I 2 2...

Page 11: ...Seek Mode The instrument changes to the Seek Mode of operation when a seek command is received from the front panel SEEK button a remote seeking probe through the associated auto matic programmable a...

Page 12: ...y should be between two and five divisions vertically with two to six cycles displayed horizontally 9 Push the Type 3B5 MAN button and check the display for three complete cycles More or less cycles m...

Page 13: ...be stable Turn the LEVEL control throughout its range Note that the display disappears and the NOT TRIG D readout comes on after several degrees of rotation in either direction from the center point...

Page 14: ...tment selects a nominal range of opera tion and the exact number of cycles displayed for a particular signal will vary due to the sweep rate selected by the Seek Circuit The sweep rate always increase...

Page 15: ...Operating Instructions Type 3B5 TYPE 3B5 CONTROL SET UP CHART Fig 2 2 Control set up chart 2 7...

Page 16: ...ntrol clockwise until the display is triggered at the correct DC level on the displayed signal Auto Triggering The sweep is automatically triggered in the INT AUTO position of the Trigger Function swi...

Page 17: ...Operating Instructions Type 3B5 Fig 2 3 Effects of Trigger LEVEL control and CHANGE SLOPE button shown for internal triggering or external triggering from an in phase time related trigger signal 2 9...

Page 18: ...period The start of the magnified portion can be positioned with the DELAY dial or external program delay to magnify any portion after 0 to 10 divisions delay from the start of the trace Delayed Sweep...

Page 19: ...the single sweep position and press the reset button The reset light indicates when the Sweep Generator has been reset and the light goes out when the circuit is locked out at the end of the sweep Af...

Page 20: ...after the amplifier unit has completed its cycle The Type 3B5 does not seek when the seek button on the amplifier unit is pressed When the Type 3B5 receives a seek command the seek circuits first see...

Page 21: ...2 V 75 18 125 V 30 19 100V 1 Maximum available current when used with an amplifier unit which also draws maximum current Program logic Both digital and analog program logic levels are used in the Typ...

Page 22: ...0 5 second 5 6 24 0 2 second 3 6 24 0 1 second 2 6 24 50 millisecond 5 8 23 20 millisecond 3 8 23 10 millisecond 2 8 23 5 millisecond 5 8 24 2 millisecond 3 8 24 1 millisecond 2 8 24 0 5 millisecond 5...

Page 23: ...se the following procedure 1 Measure the time duration of one cycle of the signal as described in the previous application 2 Frequency of the signal is the reciprocal of the time duration of one cycle...

Page 24: ...channel signals may be of opposite polarity due to 180 delay if so take into account in final delay calculation 4 Set the volts division switches to produce four or five division displays 5 Set the Ty...

Page 25: ...tion is positioned to the start of the second pulse Again note the dial reading 8 Subtract the first DELAY dial reading from the second and multiply by the sweep rate indicated by the MANUAL TIME DIV...

Page 26: ...eform shows the area of interest magnified 10 times with the delayed sweep magnifier The DELAY dial has been adjusted so the magnifier starts just before the area of interest The display has been repo...

Page 27: ...ce if so take into account in final calculation 5 Set the volts division switches and the variable volts division controls so the displays are equal and about five divisions in amplitude 6 Set the Typ...

Page 28: ...agnified sweep rate is determined by dividing the sweep rate obtained previously by the magnification Example If the sweep rate were increased 10 times with the magnifier the magnified sweep rate woul...

Page 29: ...The sweep rate is controlled by the MANUAL TIME DIV switch for Manual Mode operation or by the Counter Circuit for Seek and External Mode operation The amount of delay before sweep magnification begin...

Page 30: ...se circuits which control external mode operation and Manual or Seek Mode operation is locked out Sweep rate delayed sweep mag nification delay horizontal position trigger mode source coupling slope a...

Page 31: ...Fig 3 1 Simplified block diagram of Type 3B5 To Oscilloscope Deflection Plates GO i GO Circuit Description Type 3B5...

Page 32: ...co k Fig 3 2 Manual Mode operation conventional time base Shaded blocks are operative To Oscilloscope Deflection Plates Circuit Description Type 3B5...

Page 33: ...Fig 3 3 Seek Mode operation automatic seeking Shaded blocks are operative To Oscilloscope Deflection Plates CO Ui Circuit Description Type 3B5...

Page 34: ...advances the Counter Circuit and the Delay and Timing Circuit to the next faster sweep rate and a sweep reset pulse resets the Sweep Generator so it starts over at the left side of the graticule at t...

Page 35: ...Fig 3 5 External Mode operation programmable Shaded blocks are operative To Oscilloscope Deflection Plates co SI Circuit Description Type 3B5...

Page 36: ...Q74 Q84 LEVEL Auto Trigger Multivibrator Q75 Q85 Trigger Shaper QI 04 D105 DI 15 Auto Trigger P P Level Q33 Q34 n _ CHANGE qI SLOPE SW50 Trigger Function TRIG LEVEL CENTERING r o o o Trigger Latch Cir...

Page 37: ...e triggered from either the negative going or positive going slope of the input signal by producing the trigger pulse from either the inverted signal at the collector of Q74 or the uninverted signal a...

Page 38: ...wer for explanation of how External Power is obtained Q85 is reverse biased by this negative voltage at its base and positive slope triggering is established Operation of the remainder of the circuit...

Page 39: ...ltage of the input signal across R25B at all times Due to some losses in the circuit this voltage will be slightly lower than the total this positive level When the signal goes negative D23 is peak to...

Page 40: ...s for cor rect triggering as set by front panel controls A Triggered 1 Trigger Latch Circuit remains on and unit operates as set by the front panel controls Stable CRT display presented 2 If the unit...

Page 41: ...he logic diodes for auto triggering The level control current from the front panel LEVEL control is shunted away from the Trigger Level Amplifier No connec tions are made to K3 or K4 so no control cur...

Page 42: ...ircuit operates as described for INT AC In the EXT DC position of SW50 the near ground potential at the collector of Q54 is connected to the anode of D45 Current flows through K4 and K4 1 closes to pr...

Page 43: ...ough D42 Fig 3 11 shows the condition of the logic diodes for external level control Zero volt logic to terminal 31 also raises the potential at the base of Q44 and it conducts The Auto Trigger light...

Page 44: ...ooth for horizontal sweep When the current flow through the Disconnect Diode is interrupted by the sweep gate signal the Timing Capaci tor begins to charge through the Timing Resistor The Timing Capac...

Page 45: ...m Logic Decade Logic a f Sweep to Horizontal Amplifier Sweep Out to Vertical Unit Unblanking Pulse to CRT Alternate Trace Sync Pulse to Vertical Unit Sweep Gate to Seek Circuit Sweep Out External Hold...

Page 46: ...and attempt to turn it off and turn Q235 back on However Q235 will not come back into conduction unless its base is near the level where it would normally turn on Then the positive pulse at the base o...

Page 47: ...ator circuit is automatically retriggered after the end of each holdoff period and a free running sweep is produced Since this trace free runs at the sweep rate produced by the Sweep Generator it is a...

Page 48: ...CO I o Fig 3 13 Delay and Timing Circuit logic block diagram Circuit Description Type 3B5...

Page 49: ...f Q346 at about 6 volts Now when the sawtooth starts to run up it must offset this extra current supplied by Q333 before Q346 can switch This will be near the positive peak of the sawtooth to turn on...

Page 50: ...ng group that is charging the Timing Capacitor as determined by the multiplier logic The timing current in the other two timing groups is shunted away from the timing capacitor For example Fig 3 15 sh...

Page 51: ...Circuit Description Type 3B5 Fig 3 14 Timing resistor for Xi magnification DLY D SWP MAG switch at OFF Sweep rate 1 millisecond division 3 23...

Page 52: ...Circuit Description Type 3B5 Fig 3 15 Timing resistor for X10 delayed swdep magnification Magnified sweep rate 0 1 millisecond division 3 24...

Page 53: ...Circuit Description Type 3B5 Fig 3 16 Timing resistor for X100 delayed swe p rr agnification Magnified sweep rate 10 microseconds division 3 25...

Page 54: ...near zero also Now as the X10 Magnifier Gate switches off the collector of Q374 rises positive to about zero volts The grid of the indicator oscilloscope CRT is raised more positive to provide a brig...

Page 55: ...23 to establish a negative bias level at the base of Q514 By adding cur rent through terminal 14 the desired external program hori zontal position can be established Notice that the front panel POSITI...

Page 56: ...mbination provide Manual Mode magnifier decoding For example when the MANUAL TIME DIV switch is in the 5 s position and the DLY D SWP MAG switch is set to X1 there is no output from the decade readout...

Page 57: ...Q473 remains off because the decade logic current is shunted by D471 This logic combination provides a readout of_____ ms DIV with the multiplier provided by the Multiplier Readout stage X100 delayed...

Page 58: ...I Circuit Description Type 3B5 Fig 3 19 Decade readout current for 1 2 and 5 millisecond sweep rates X1 sweep magnification I I I I I I I I I I I I I I I I I 3 30 I...

Page 59: ...Circuit Description Type 3B5 fi I I I I I I I I I I I I I 1 I I I I Fig 3 20 Decade readout current for 0 1 0 2 and 0 5 mil isecond magnified sweep rates X10 delayed sweep magnification 3 31...

Page 60: ...Circuit Description Type 3B5 Fig 3 21 Decade readout current for 10 20 and 50 microsecond magnified sweep rates X100 delayed sweep magnification I I I I I I I I I I I I I I 1 I I I I 3 32...

Page 61: ...GO i GO GO Fig 3 22 Seek Ciicuit Logic block diagram Circuit Description Type 3B5...

Page 62: ...applied 3B5 seeks to 0 2 ms DIV CYCLES SWEEP adjustment set according to Calibration procedure Input Signal Seek mono pulse at pin 8 of J400 Trigger pulse at junction of D105 and DI 15 and window gate...

Page 63: ...pulses at pin 11 of J400 5 volts div 50 ms div 5 volts div 50 ms div Resultant CRT display Repetition rate of these waveforms 4s a function of sweep range CYCLES SWEEP adjustment and holdoff time Fig...

Page 64: ...vels D640 and D641 comprise an and gate for the 1 multiplier and 0 1 s decade h logic levels When both of these logic levels are 12 volts the base of the Advance Gate stage goes negative and succeedin...

Page 65: ...from the Seek Circuit The first set of waveforms shows circuit conditions with a 1 kHz sine wave applied CYCLES SWEEP adjustment set according to Calibration Procedure The second set of wave forms sh...

Page 66: ...Circuit Description Type 3B5 Fig 3 24 Counter Ci cuit Logic block diagram Fig 3 25 Multiplier Counte circuit conditions for 5 output I I I I I I I I I I I I I I I I I I I 3 38...

Page 67: ...Circuit Description Type 3B5 Fig 3 26 Multiplier Counter circuit conditions for 2 output Fig 3 27 Multiplier Counter circuit conditions for 1 output 3 39...

Page 68: ...l change at its collector is coupled to the base of Q755 through C856 and R753 The collector of Q755 goes negative to lock out the remaining transistors in the B group The decade logic output on the 0...

Page 69: ...current of Q905 flows through B905 and the SEEK pushbutton lights up This bulb drops about six volts of the 12 volt level at the col lector of Q905 to provide current to the 6 volt output line Current...

Page 70: ...u k KJ Fig 3 29 Circuit conditions for Manual Mode operation Circuit Description Type 3B5...

Page 71: ...w K w Fig 3 30 Circuit conditions for Seek Mode operation Circuit Description Type 3B5...

Page 72: ...w I u U Fig 3 31 Circuit condition for External Mode operation Circuit Description Type 3B5...

Page 73: ...eration For External Mode operation the bias level is disconnected from Q944 and the circuit is controlled by external program magnifier logic through terminal 33 34 or 36 of J30 However circuit opera...

Page 74: ...ce there is no pull down resistor on the Xi00 magnifier logic line Readout Board The Readout Board circuit shown on diagram 10 shows the connection to this board and the bulbs which produce the readou...

Page 75: ...in narrow spaces or for cleaning ceramic terminal strips and circuit boards Lubrication The reliability of potentiometers rotary switches and other moving parts can be maintained if they are kept prop...

Page 76: ...es the wiring color code for the power supply voltages used in the Type 3B5 Resistor Color Code In addition to the brown composi tion resistors some metal film resistors identifiable by their gray or...

Page 77: ...ender Tektronix Part No 012 0078 00 Purpose Permits access to the circuit cards in this unit Troubleshooting Techniques This troubleshooting procedure is arranged in an order which checks the simple t...

Page 78: ...e used to take these readings see the test conditions in the Diagram section TABLE 4 3 Circuit Isolation T oubleshooting Guide Preliminary setup 1 Remove the Counter Card and Logic Card 2 Replace the...

Page 79: ...he resistance and voltage are correct the coil can be assumed to be correct check the reed relay position and continuity 4 If the resistance is incorrect take into account surrounding circuitry discon...

Page 80: ...ceramic terminal strips However if ordinary solder is used repeatedly or if excessive heat is applied the solder to ceramic bond may be broken Solder containing 3 silver is usually available locally...

Page 81: ...sitioned the pin connectors may be damaged Circuit Card Replacement If one of the plug in circuit cards is damaged and cannot be repaired it should be replaced with a new circuit card Replacement card...

Page 82: ...he same physical position as the old one 3 Position the leads correctly and solder the new reed relay to the solder posts old reed relay leads Avoid exces sive heat on the reed relay use a heat sink o...

Page 83: ...ront panel with one hand and slide the entire assembly to the rear as far as the cabling allows 6 Reverse the order of removal to reassemble the unit Guide the CAL adjustment extension into the front...

Page 84: ...Maintenance Type 3B5 Fig 4 5 Location of circuit boards and cards in ths Type 3B5 see Figs 4 6 to 4 13 for component location 4 10...

Page 85: ...I Maintenance Type 3B5 I I I I I I I I I I I I I I I I I Fig 4 6 Location of componerts on rear of Time Base circuit board I 4 11...

Page 86: ...nance Type 3B5 Fig 4 7 Location of components on Time Base circuit and Timing Circuit shown board partial Sweep Trigger I I I I I I I partial Operating Mode Power and partial Delay I I I I I I I I I I...

Page 87: ...Maintenance Type 3B5 Fig 4 8 Location of components on Time Base circuit board partial Partial Delay and Timing Circuit Sweep Generator and Horizontal Amplifier shown 4 13...

Page 88: ...Maintenance Type 3B5 Fig 4 9 Location of components on Logic Card 4 14...

Page 89: ...u Oi Fig 4 10 Location of components on Counter Card Maintenance Type 3B5...

Page 90: ...Maintenance Type 3B5 Fig 4 11 Location of ccmponents on Control Board I I I I I 1 1 1 I I I I I I I I I I I 4 16...

Page 91: ...Maintenance Type 3B5 fi I I I I I I I I I I I I I I I I I I Fig 4 13 Location of omponents on Readout Board 4 17...

Page 92: ...NOTES I...

Page 93: ...within 3 from 10 Hz to 2 MHz For example General Radio 1310 A Oscillator 6 Time mark generator Marker outputs 5 seconds to 20 nanoseconds accuracy within 0 1 Tektronix Type 184 Time Mark Generator re...

Page 94: ...l Range REQUIREMENT EXT AC checked as part of step 1 EXT DC at least and 10 volts a Set the LEVEL control to midrange b Set the low frequency sine wave generator for a two division CRT display 20 volt...

Page 95: ...CRT display starts on the negative slope of the signal see Fig 5 1 and the slope light is on g Set the Trigger Function switch to EXT DC h Press the CHANGE SLOPE button to provide slope triggering i T...

Page 96: ...nd slope triggering u Disconnect all test equipment Fig 5 2 Typical CRT display showing correct basic timing e CHECK CRT display for one marker each division between the first and ninth vertical grati...

Page 97: ...V within 3 of full scale at all other sweep rates includes incremental linearity NOTE See Section 6 steps 10 and 11 for verification of DELAY dial incremental linearity a Set the time mark generator f...

Page 98: ...t the leading edge of the applicable marker Check for 15 minor dial divi sions or less deviation between the major dial division and the dial setting which produces the correct display 3 of full scale...

Page 99: ...e POSITION control see Fig 5 7A d Set the MANUAL TIME DIV switch to 50 ns e CHECK Marker should remain within 1 division of the first graticule line see Fig 5 7B 13 Check Normal and Magnified Timing A...

Page 100: ...s DIV 5 s DIV 5 s DIV 1 3 10 s 10 s 1 s 0 1 s 10 is 10 s DIV 1 s DIV 1 s DIV 1 3 20 s 10 s 1 s 0 1 s 10 i s 20 s DIV 2 s DIV 2 s DIV 2 3 50 s 50 s 5 s 0 5 s 10 is 50 s DIV 5 zs DIV 5 s DIV 1 3 1 ms 0...

Page 101: ...programmable amplifier unit input connector b Connect the probe tip to the indicator oscilloscope calibrator output connector c Press the seek button on the remote seeking probe d CHECK Both the ampl...

Page 102: ...DLY D SWP MAG switch to OFF b Connect the 10X probe to the test oscilloscope input c Set the test oscilloscope for a vertical deflection of 0 05 volt division 0 5 volt division including 10X probe and...

Page 103: ...rminals 7 and 18 Caution 125 volts of the PROGRAM connector If using special circuit set switch to single sweep f CHECK A trace is not displayed but the NOT TRIG D readout remains off g Connect a jump...

Page 104: ...NOTES...

Page 105: ...x Type 191 Constant Amplitude Signal Generator recommended 5 Low frequency sine wave generator Frequency 10 Hz to 2 MHz output amplitude 0 5 to 40 volts peak to peak amplitude accuracy within 3 from 1...

Page 106: ...Calibration Type 3B5 Fig 6 1 Recommended calibration equipment...

Page 107: ...crosecond Timing C168 Page 6 13 Correct timing at 1 s DIV 15 Adjust 10 Microsecond Timing C315 Page 6 14 Correct timing at 10 s DIV 22 16 Adjust 0 1 Microsecond Timing C502 Page 6 15 Correct timing at...

Page 108: ...djustment is made To prevent recalibration of other circuits when performing a partial cali bration readjust only if the listed tolerance is not met How ever when performing a complete calibration bes...

Page 109: ...le Connect the output of the BNC T connector to the Type 3B5 EXT TRIG INPUT connector with a BNC cable c Set the low frequency sine wave generator for a four division CRT display 40 volts peak to peak...

Page 110: ...y clockwise g CHECK Stable CRT display for both and slope triggering h ADJUST Auto Trigger Centering adjustment R35 for stable CRT display of both 4 and slope triggering Fig 6 3 Location of TRIG LEVEL...

Page 111: ...k Set the Trigger Function switch to INT AUTO l CHECK Stable CRT display can be obtained with the LEVEL control for both 4 and slope triggering throughout the complete rotation of the LEVEL control 5...

Page 112: ...onnect the output of the BNC T connector to the Type 3B5 EXT TRIG INPUT connector with a 50 ohm BNC cable c Set the constant amplitude generator for a 0 5 division CRT display 0 5 volt peak to peak at...

Page 113: ...ction switch to EXT DC o CHECK Stable CRT display can be obtained with the LEVEL control for both and slope triggering p Without changing the output amplitude set the con stant amplitude generator to...

Page 114: ...for one millisecond markers d Position the second marker to the first graticule line with the POSITION control e CHECK CRT display for one marker each division between the first and ninth graticule li...

Page 115: ...k Sweep Length a Set the time mark generator for one millisecond and 0 1 millisecond marker output b Position the eleventh one millisecond marker to the cen ter vertical line with the POSITION control...

Page 116: ...Delay Dial Incremental Linearity and Accuracy a Set the DELAY dial to 2 00 and then rotate the dial as necessary so the magnified portion starts at the leading edge of the second marker b CHECK DELAY...

Page 117: ...ivision 3 parts or less per 10 000 see Fig 6 12B 13 Adjust One Second Timing a Set the time mark generator for one second markers b Change the following control settings DLY D SWP MAG MANUAL TIME DIV...

Page 118: ...15 Adjust 10 Microsecond Timing a Set the time mark generator for 10 microsecond markers b Set the MANUAL TIME DIV switch to 10 s c CHECK CRT display for one marker each division between the first and...

Page 119: ...TIME DIV switch to 0 1 s c Set the LEVEL control for a triggered display d CHECK CRT display for one marker each division between the first and ninth vertical graticule lines second and tenth marker...

Page 120: ...Calibration Type 3B5 A 0 1 s Cal C502 Fig 6 16 A Typical CRT display showing correct 0 1 microse ond timing IB Location of 0 1 s Cal adjustment Time Base Board NOTES 6 16...

Page 121: ...y Compensation NOTE The Type 3B5 must not be on an extender for steps 17 through 21 Also the amplifier unit must have a bandpass of at least 10 MHz to check these steps a Test equipment setup is shown...

Page 122: ...g out at the top of the waveform A typical test oscilloscope display is shown in Fig 6 18B NOTE This is a preliminary adjustment for optimum high frequency response Further adjustment to provide Time...

Page 123: ...DJUST 50 ns Cal adjustment R508 see Fig 6 20B for one marker each division h Set the time mark generator for 20 nanosecond markers i Set the MANUAL TIME DIV switch to 20 ns j Move the nearest marker t...

Page 124: ...Note readjust only if out side the tolerances listed in step b d If adjustments are made recheck step 19 21 Check Normal and Magnified Timing Accuracy a Connect the time mark generator trigger output...

Page 125: ...s 10 zs 1 s 0 1 ms 2 ms DIV 20 s DIV 2 s DIV 2 3 5 ms 0 5 ms 50 zs 5 s 0 1 ms 5 ms DIV 50 s DIV 5 s DIV 1 3 1 ms 1 ms 0 1 ms 10 s 1 ms 1 ms DIV 0 1 ms DIV 10 zs DIV 1 3 2 ms 1 ms 0 1 ms 10 s 1 ms 2 ms...

Page 126: ...and ninth graticule lines A typical CRT display is shown in Fig 6 22 CAUTION To prevent permanent damage to the CRT phos phor either reduce the trace intensity at slow sweep rates to a level which doe...

Page 127: ...ed g Press the EXT button momentarily h CHECK EXT button lights as long as it is held depressed i Release the EXT button j CHECK MAN button lights and a stable display is presented 23 Check Seek Mono...

Page 128: ...n the negative slope d Press the MAN button e CHECK Test oscilloscope display for a 1 8 division window gate signal see Fig 6 25B f ADJUST CYCLES SWEEP adjustment R650 see Fig 6 25C so the window gate...

Page 129: ...Check from 30 hertz to 2 megahertz e Disconnect the low frequency sine wave generator and connect the time mark generator to the amplifier unit through the 50 ohm BNC cable and the 50 ohm termination...

Page 130: ...s to about 12 volts at the start of each sweep h Set the DLY D SWP MAG switch to X100 i CHECK Test oscilloscope display for a trace near the zero volt level during the magnified sweep time 29 Check Sa...

Page 131: ...play for about three cycles of the sawtooth signal and a vertical deflection of one divi sion 0 1 division see Fig 6 29B 0 05 milliamp division 10 output from Type 3B5 30 Check Sawtooth Output to Ampl...

Page 132: ...nector see Fig 6 32 to chassis ground b CHECK Meter reading approximately 12 2 volts c Connect the DC voltmeter from terminal 18 of the PRO GRAM connector see Fig 6 32 to chassis ground d CHECK Meter...

Page 133: ...isplay when checking external horiiontal operation 33 Check External Horizontal Input a Connect a jumper lead wire from the indicator oscillo scope calibrator output connector to terminal 4 of the PRO...

Page 134: ...is given here for checking the external programmed operation of this unit If a Tektronix external programmer is used a complete checkout procedure for the programmable functions is given in the Instr...

Page 135: ...ystyrene EMC electrolytic metal cased prec precision EMT electrolytic metal tubular PT paper tubular ext external PTM paper or plastic tubular molded F 1 focus and intensity RHB round head brass FHB f...

Page 136: ...g information in your order Part number instrument type or number serial or model number and modification number if applicable If a part you have ordered has been replaced with a new or improved part...

Page 137: ...83 w red coating Incandescent 683 w red coating Incandescent 683 Incandescent 6835 Incandescent 6835 Incandescent 6835 Incandescent 6835 Incandescent 683 Incandescent 683 Incandescent 6835 Capacitors...

Page 138: ...18 00 47 pF Cer 500 V C252 281 0518 00 47 pF Cer 500 V 100 172X C253 283 0079 00 0 01 F Cer 250 V C255 281 0525 00 470 pF Cer 500 V C257 281 0543 00 270 pF Cer 500 V 10 100 172 C257 281 0605 00 200 pF...

Page 139: ...manium Tek Spec D45 152 0075 00 Germanium Tek Spec D46 152 0075 00 Germanium Tek Spec D52 152 0075 00 Germanium Tek Spec D54 152 0075 00 Germanium Tek Spec D56 152 0075 00 Germanium Tek Spec D62 152 0...

Page 140: ...ermanium Tek Spec D264 152 0061 00 Silicon Tek Spec D265 152 0119 00 Zener 1N969A 0 4W 22V 10 100 279 D265 152 0281 00 Zener 1N969B 0 4W 22 V 5 280 up D269 152 0061 00 Silicon Tek Spec D272 152 0071 0...

Page 141: ...00 Tunnel 1N3712 1mA D366 152 0076 00 Zener 1N4372 0 4 W 3 V 10 D367 152 0239 00 Silicon Tek Spec D368 152 0239 00 Silicon Tek Spec D369 152 0239 00 Silicon Tek Spec D371 152 0075 00 Germanium Tek Sp...

Page 142: ...152 D531 152 0243 00 Zener 1N965B 0 4 W 15 V 5 D532 152 0071 00 Germanium ED 2007 D572 152 0166 00 Zener N753A 0 4 W 6 2 V 5 D909 152 0107 00 Silicon Replaceable by 1N647 D911 152 0075 00 Germanium Te...

Page 143: ...260 0721 00 Reed Inductors L106 108 0215 00 1 1 H L139 108 0226 00 100 H L563 108 0165 00 4 7 mH L935 108 0359 00 100 H Transistors Q14 151 0155 00 Silicon Replaceable by 2N2925 Q23 151 0175 00 Silico...

Page 144: ...by 2N2925 Q364 151 0162 00 Silicon 2N3324 Q374 151 0162 00 Silicon 2N3324 Q404 151 0183 00 Silicon Selected from 2N2192 Q514 151 0190 00 Silicon 2N3904 Q534 151 0188 00 Silicon 2N3906 Q543 151 0190 00...

Page 145: ...0124 00 120 k W 5 R63 323 0366 00 63 4 k 1 2 W Prec 1 R69 315 0332 00 3 3 k W 5 R71 315 0332 00 3 3 k W 5 R71 315 0182 00 1 8 k W 5 R72 316 0564 00 560 k W R74 315 0163 00 16 k W 5 R75 315 0752 00 7 5...

Page 146: ...5 R174 315 0101 00 100 W 5 R175 303 0333 00 33 k 1 W 5 R176 315 0101 00 100 W 5 R179 315 0101 00 100 W 5 R181 315 0103 00 10 k W 5 R182 315 0103 00 10 k W 5 R183 315 0184 00 180 k W 5 R184 315 0154 00...

Page 147: ...0 3 9 k W 5 173 up R258 315 0102 00 1 k W 5 R259 315 0222 00 2 2 k W 5 R262 315 0821 00 820 W 5 R263 315 0562 00 5 6 k W 5 R265 301 0362 00 3 6 k 1 2 W 5 R268 310 0632 00 30 k 4W Prec 1 R272 315 0101...

Page 148: ...0 3 3 k W 5 R373 315 0563 00 56 k W 5 R374 308 0407 00 12 k 3 W WW 5 R381 309 0023 00 2 M 1 2 W Prec 1 R382 323 0418 00 22 1 k 1 2 W Prec 1 R383 324 0322 00 22 1 k 1 W Prec 1 R384 309 0093 00 4 M 1 2...

Page 149: ...31 00 301 k 1 8 W Prec 1 R542 315 0102 00 1 k W 5 R543 315 0104 00 100 k W 5 R544 310 0619 00 13 5 k 4W Prec 1 R546 323 0400 00 143 k 1 2 W Prec 1 R549 315 0181 00 180 W 5 R551 321 0277 00 7 5 k 1 8 W...

Page 150: ...EXT SW940 260 0776 00 Lever DLY D SWP MAG Transformers T140 120 0180 00 Toroid 4 turns trifilar T275 276 0557 00 Core Toroid Ferrite Electron Tubes VI63 157 0080 00 7586 aged V544 154 0047 00 12BY7 V...

Page 151: ...ermanium Tek Spec D425 152 0075 00 Germanium Tek Spec D427 152 0075 00 Germanium Tek Spec D428 152 0075 00 Germanium Tek Spec D431 152 0075 00 Germanium Tek Spec D432 152 0075 00 Germanium Tek Spec D4...

Page 152: ...00 Germanium Tek Spec D629 152 0075 00 Germanium Tek Spec D632 152 0075 00 Germanium Tek Spec D635 152 0075 00 Germanium Tek Spec D640 152 0075 00 Germanium Tek Spec D641 152 0075 00 Germanium Tek Sp...

Page 153: ...on Selected from 2N2192 Q925 151 0183 00 Silicon Selected from 2N2192 Resistors Resistors are fixed composition 10 unless otherwise indicated R411 315 0222 00 2 2 k W 5 R412 315 0222 00 2 2 k W 5 R413...

Page 154: ...641 315 0104 00 100 k W 5 R643 315 0224 00 220 k W 5 R645 315 0222 00 2 2 k W 5 R646 315 0333 00 33 k W 5 R653 315 0102 00 1 k W 5 R654 315 0122 00 1 2 k W 5 R655 315 0561 00 560 W 5 R657 315 0561 00...

Page 155: ...Cer 250 V C812 283 0026 00 0 2 F Cer 25 V C817 283 0079 00 0 01 F Cer 250 V C822 283 0026 00 0 2 F Cer 25 V C827 283 0079 00 0 01 F Cer 250 V C856 283 0079 00 0 01 F Cer 250 V C866 283 0079 00 0 01 F...

Page 156: ...ec D781 152 0075 00 Germanium Tek Spec D782 152 0075 00 Germanium Tek Spec D783 152 0075 00 Germanium Tek Spec D784 152 0075 00 Germanium Tek Spec D785 152 0075 00 Germanium Tek Spec D786 152 0075 00...

Page 157: ...151 0183 00 Silicon Selected from 2N2192 Q785 151 0183 00 Silicon Selected from 2N2192 Q815 151 0183 00 Silicon Selected from 2N2192 Q825 151 0183 00 Silicon Selected from 2N2192 Q855 151 0183 00 Sil...

Page 158: ...R771 315 0222 00 2 2 k W 5 R772 315 0222 00 2 2 k W 5 R773 315 0222 00 2 2 k W 5 R774 315 0104 00 100 k W 5 R775 315 0222 00 2 2 k W 5 R781 315 0222 00 2 2 k W 5 R782 315 0222 00 2 2 k W 5 R783 315 02...

Page 159: ...315 0222 00 2 2 k W 5 R864 315 0104 00 100 k W 5 R865 315 0222 00 2 2 k W 5 R871 315 0222 00 2 2 k W 5 R872 315 0222 00 2 2 k W 5 R873 315 0222 00 2 2 k W 5 R874 315 0104 00 100 k W 5 R875 315 0222 00...

Page 160: ......

Page 161: ...ust be purchased separately unless otherwise specified PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tek...

Page 162: ...Mechanical Parts List Type 3B5 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS Located behind diagrams FIG 1 FRONT SWITCHES FIG 2 CHASSIS REAR FIG 3 ACCESSORIES...

Page 163: ...0 0012 00 1 14 210 0840 00 1 15 210 0413 00 1 16 406 0023 00 1 17 211 0504 00 2 ROD extension ASSEMBLY coupling flexible assembly includes RING diameter x 0 172 inch long RING diameter x 0 437 inch lo...

Page 164: ...TCH unwired DLY D SWP MAG mojnting hardware not included w switch 35 220 0413 00 2 NUT hex 4 40 x 3 14 x 0 562 inch long 36 131 0106 00 1 CONNECTOR coaxial 1 contact BNC mojnting hardware not included...

Page 165: ...re not included w connector 61 210 0004 00 1 LOCKWASHER internal 4 210 0201 00 1 LUG solder SE 4 62 210 0406 00 2 NUT hex 4 40 x 3 16 inch 211 0099 00 X230 279 2 SCREW 4 40 x 5 i6 inch 211 0038 00 280...

Page 166: ...inch RESISTOR variable mounting hardware for each not included w resistor WASHER flat 4 IDx inch OD NUT hex 4 32xs u inch PLATE bulkhead slate includes SCREW 4 40 x 2 inch THS GFOMMET plastic 2 inch...

Page 167: ...x s w inch ASSEMBLY coupling flexible assembly includes RING 3 s diameter x 0 172 inch long COUPLING plastic SCREW set 4 40 x 3 14 inch HSS ROD extension ASSEMBLY circuit board CONTROL assembly inclu...

Page 168: ...board TIME BASE assembly includes SCCKET transistor 3 pin SCCKET transistor 3 pin SC CKET tube 9 pin SCCKET tube ceramic 9 pin SCCKET nuvistor 5 pin SCCKET transistor 6 pin CONNECTOR square pin CL P...

Page 169: ...nt Front side or rear panel control or connector Clockwise control rotation in direction of arrow Refer to indicated diagram Connection to circuit board made with pin connector at indicated pin Connec...

Page 170: ...e Type 3B5 chassis ground Recommended type as used for voltages on diagrams Simpson Type 262 Type 3B5 Conditions Line Voltage 115 volts Signal applied None Connectors No connections Trace position Cen...

Page 171: ...TER 0443 _ Q453 0473 TRIGGER LEVEL AMPLIFIER RANGE SLOPE IDELAYI DELAY COMPARATOR Q333 Q34 QS43 035 Q344 TIMING CIRCUIT 4 MAGNIFIER GATES Q324 Q3 4 D3 5 SAWTOOTH SWEEP GENERATOR VIG3 Qifcl QI93 QI74 E...

Page 172: ...12 2 V TRIGGER PULSE I25V DEC IOOV DEC V w TRIG LEVEL CENTERING H e DIO 5 4 TRIGGER FUNCTION I SW5O 7 COUNTER CIRCUIT OPERATING MODE POWER INTERCONNECTING DIAGRAM 2 SWEEP GENERATOR SEEK CIRCUIT EXT TR...

Page 173: ...__ 4125V I F q REG2 VOLTAGES and WAVEFORMS obtained under conditions given onDiagram except as follows TR GGER FUNCTION INT AC tHHlDLY D SWP MAG X10 or XIOO 1Z i AZ FROM COLL 7 55 11 2 4 4188V RIGS 0...

Page 174: ...RTIAL READOUT BOARO 0 FOR TYPES XI FROM VOLTAGE8 and WAVEFORMS obtained under eauttUons given an Diacram except ae follove DLY D 8WP MAO JC10 WLTD SWP MAG XIOO EXT IOOV PWR 12 2V 12 2V DELAY TIMING CI...

Page 175: ...MODE POWER INTERCONNECTING DIAGRAM SEE PARTS LIST FOR SEMICONDUCTOR TYPES R5SI _ OSSI 7 5KS 7 5 5 16 I RSS2 54 9K IOOV VOLTAGES and WAVEFORMS obtained under conditions given on Diagramexcept as follo...

Page 176: ...J400 RtADOUT BOARD 3B5 PLUG IN A READOUT...

Page 177: ...ns given on Diagram L except as follows KTRIGGER FUNCTION INT AC NOTE Operating waveforms for this circuit are shown in Section 3 _L CG3G z OI IOOK IOOV RG27 DG4O FROM 5W45O o iM K FROM CC I RG4I IOOK...

Page 178: ...ns given on DiagramrfS except aa follows MOK SEEK Signal Applied SOOHa sinewave seeks to lma DIV SEE PARTS UST FOR COUNTER CARD SEMICONDUCTOR TYPES II KH 0725 0715 R7I3 C7I9 O e 3 27 13 I2 5R7OI 0731...

Page 179: ...EXTERNAL POWER 12 2V B9O5 Q 7 EXTERNAL POWER 12 2V AD9OI R9 l 2 2K R9OA 2 2K yp9i9 man pwr 12 2V PARTIAL LOGIC CARD 0902 R9O2 2 2K R9O3 IK 12 2V 12 2V Q92S A LevPOW REFERENCE DIAGRAMS DELAY TIMING CI...

Page 180: ...FROM AV II5VAC AVAILABLE DEPENDING ON SERIAL NUMBER OF INDICATOR UNIT 10 12 JZ 3 o xz xz EXTERNAL LOCKOUT TO ICYCLES SWEEP SWEEP GATE FROM SH TRIG SIGNAL TO CC SWEEP FROM TO CRT RIGHT DEFLECTION PLATE...

Page 181: ...REFERENCE DIAGRAMS SWEEP GENERATOR DELAY 4 TIMING CIRCUIT READOUT LOGIC FROM DO FROM EE FROM 13 k______ I FROM FF TYPE 3B5 PLUG IN...

Page 182: ...397 R E A D O U T B O A R D 10 6b READOUT BOARD...

Page 183: ...R SWEEP GENERATOR DELAY 4 TIMING CIRCUIT HORIZONTAL AMPLIFIER 6 OPERATING MODE POWER INTERCONNECTING DIAGRAM SEE PARTS LIST FOR SEMICONDUCTOR TYPES TYPE 3B5 PLUG IN sit PARTS UST FOR EARUER VALUES AND...

Page 184: ...FIG 1 FRONT SWITCHES TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...

Page 185: ...FIG 2 CHASSIS REAR 3 GS to TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...

Page 186: ...OPTIONAL ACCESSORIES...

Page 187: ...al Model Eff No Disc Q t y Description 1 2 3 4 5 3 1 131 0422 00 i CONNECTOR 37 pin 2 200 0660 01 1 COVER plastic connector 3 213 0045 00 2 SCREW thread cutting 4 40 x 3 u inch 070 0538 00 2 MANUAL in...

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