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Содержание 511A-AD

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Страница 3: ...E 511A AD SERIAL NUMBER _________________________ INSTRUCTION MANUAL 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 ...

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Страница 5: ...uator Frequency compensated RC type with attenuation ratios of 2 4 and 8 Vertical Deflection Sensitivity Without amplifier 27 V per cm maximum 200 V per cm minimum DC or peak to peak AC 1 Stage 2 7 V per cm maximum 40 V per cm mini mum 2 Stages 27 V per cm maximum 4 V per cm mini mum Sensitivity is reduced by a factor of 10 when probe is used In no case should the combined AC and DC input voltages...

Страница 6: ...EED MULT Decade control plus vernier control setting sweep speed and duration within range indicated by SWEEP RANGE VERT POSITION Twin potentiometers controlling aver age potentials of vertical deflection plates and therefore the image posi tion EXT SWEEP ATTEN Potentiometer controlling the fraction of the voltage applied to EXT SWEEP INPUT binding post which will reach the grid of the sweep ampli...

Страница 7: ... grid of V4 in the multivibrator circuit This bias determines whether the sweep will operate recurrently or must be triggered DEFLECTION POLARITY Switch determining source and polari ty of trigger voltage Potentiometer controlling the bias ap plied to the trigger amplifier tube V2 and thereby determining the ampli tude of trigger signals applied to the multivibrator Binding post connecting externa...

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Страница 9: ...sine wave appears The oscilloscope is now observing the 50 60 cycle power line waveshape clipped by the calibrator cir cuits To observe other waveshapes connect them to the SIG NAL INPUT binding post turn the SIGNAL CALIBRATE switch to SIGNAL select the appropriate sweep speed etc SWEEP CIRCUIT ADJUSTMENTS The sweep circuit of the Type 511A is different from the gas tube type usually employed in p...

Страница 10: ...y different tubes etc by a screwdriver adjustment inside the case Procedure for adjustment of this control is described in Section IV Recurrent Sweep In case it is desirable to have a sweep without using any sort of trigger merely advance the SWEEP STABILI TY control until a stable sweep is obtained This sweep is the conventional sawtooth variety as used in most oscilloscopes Single Sweep The trig...

Страница 11: ...le if desired by in creasing L6 and readjusting L7 L8 L9 and L10 but overshoot will occur on steep wave fronts With opti mum transient response the rise time 10 to 90 of full amplitude is 04 microseconds or better At the low frequency end of the band the top of a 10 000 micro second square pulse will not depart by more than 5 from flatness The deflection sensitivity is approximately 2 7 V per cm p...

Страница 12: ...e is now equal to the signal amplitude CAUTION IF THE INPUT PROBE ATTEN 10X IS USED THE SIGNAL AMPLITUDE IS EQUAL TO TEN TIMES THE CALIBRA TION VOLTAGE The scale on the CAL VOLTAGE potentiometer is calibrated in peak to peak volts If a sine wave is being measured this may be converted to R M S by dividing by 2 828 CAUTION DO NOT OVERLOAD THE AMPLIFIERS WHEN MAKING AMPLI TUDE MEASUREMENTS Another m...

Страница 13: ...2 7 0 180 120 6 0 DEGREES OF PHASE SHIFT FREQUENCY TEKTRONIX JNC 12 28 50 ...

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Страница 15: ... TRIGGER SEL switch is in the INT or EXT positions signals are taken off the cathode of VI and do not change in polarity Therefore a positive impulse must be supplied by the external source or vertical amplifier as the case may be With the TRIGGER SEL in the INT or EXT positions signals are taken off the plate and reversed in polarity thus providing the required positive output from negative trigg...

Страница 16: ...the beam linearly across the tube and return it to its starting point During the waiting period the 6AG7 tube V9 is held fully conducting since it has no bias and therefore its plate is about at ground potential When a trigger occurs the negative pulse from the multivibrator cuts the grid of V9 off very rapidly The plate therefore rises in exponential fashion at a rate depending upon R20D R20D1 9 ...

Страница 17: ...st est sweeps C24 and C25 are shunted across them to transmit these frequencies VERTICAL DEFLECTION SYSTEM The vertical deflection system provides the means of attenuating or amplifying input signal amplitudes so that they may present a convenient image on the cath ode ray tube Signals may be attenuated as much as 8 times or amplified as much as 100 times without ap preciable change in shape Probe...

Страница 18: ... PEAK VOLTS NOT RMS MULTIPLY RMS BY 2 828 TO CONVERT TO PEAK TO PEAK The calibrator waveform is derived from the line fre quency voltage of a 280 volt T1 secondary winding The positive peak is clipped limited by the diode connected section of a 12AT7 V16 1 The point of limit ing is determined by the setting of the CAL ADJ poten tiometer R75 4 Since the voltage across R75 4 is ob tained from the 22...

Страница 19: ... and V26 is used This regulator oper ates in the same manner as the 225 supply using the regulated 225 as reference voltage Thus if the 225 is not set ats its correct value the 450 volt output will also be in error In order to provide the and 1500 volts neces sary to operate the CRT an oscillator type supply is used Since the input power to the oscillator comes from the regulated 225 volts its out...

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Страница 21: ...uld be checked for serious discoloration which would indicate excessive dissipation and there fore faulty operation A moderate amount of discolora tion is normal 3 Connections Loose screws or nuts should be tightened This is especially important when the screw serves as an electrical connection Corrosion of the chassis and electronic components is unlikely under normal conditions It should be remo...

Страница 22: ...rol centered the HOR POSITION control clockwise the SWEEP STABILITY control counter clockwise and no vertical input signal measure the voltage between each CRT deflection plate and ground which should be within 60 volts The average potential of both horizontal X plates or both vertical Y plates should be within 40 volts of ground when measured under the above conditions Abnormal potential on the h...

Страница 23: ...f V9 fig 21 is not If the sawtooth amplitude is low slow sweep speed V9 is known to be good and circuit volt ages appear normal remove V9 and measure the volt age at terminal 4 of V9 socket which should be between 5 and 30 volts This measurement is made with the SWEEP STABILITY control fully counter clockwise Error in sweep speed on one range only may be due to a defective timing capacitor C15A B ...

Страница 24: ...ttenuator section If satisfactory waveshape cannot be obtained try another 6AG7 2 C39 C51 These electrolytic capacitors are em ployed in the low frequency compensating circuits and should be replaced if the range of R99 and R116 be comes insufficient to properly compensate the amplifier It is necessary that the actual capacity be within the limits specified in the Parts List section 3 R111 R111 1 ...

Страница 25: ...NT Centered AVERAGE TUBE SOCKET VOLTAGES Measured at 117 volt line DC voltmeter sensitivity 20 000 ohms per volt Tube Pin To Voltage V1 1 2 Gnd 0 3 5 Gnd 15 5 4 Gnd 7 50 volt scale 6 Gnd 187 7 Gnd 6 5AC 8 Gnd 177 V2 1 2 Gnd 0 3 5 Gnd 10 TRIGGER AMPL clockwise 3 5 Gnd 0 TRIGGER AMPL counter clockwise 4 Gnd 0 TRIGGER AMPL clockwise 4 Gnd 20 TRIGGER AMPL counter clockwise 50 volt scale 6 Gnd 225 7 Gn...

Страница 26: ...ise 8 Gnd 3 2 SWEEP STABILITY counter clockwise V10 3 Gnd 0 4 Gnd 6 5AC 5 Gnd 225 6 Gnd 65 SWEEP STABILITY clockwise 6 Gnd 3 2 SWEEP STABILITY counter clockwise 7 Gnd 70 SWEEP STABILITY clockwise 7 Gnd 16 SWEEP STABILITY counter clockwise V11 1 Gnd 156 MAGNIFIER POSITION out 1 Gnd 145 MAGNIFIER POSITION clockwise 2 Gnd 135 MAGNIFIER POSITION out 2 Gnd 110 MAGNIFIER POSITION clockwise 3 Gnd 0 4 Gnd...

Страница 27: ... scale 6 Gnd 160 DEFLECTION POLARITY up 6 Gnd 195 DEFLECTION POLARITY center 6 Gnd 165 DEFLECTION POLARITY down 7 Gnd 0 8 Gnd 190 DEFLECTION POLARITY up 8 Gnd 150 DEFLECTION POLARITY center 8 Gnd 110 DEFLECTION POLARITY down V19 1 5 Gnd 32 DEFLECTION POLARITY up and center 1 5 Gnd 29 DEFLECTION POLARITY down 2 Gnd 6 5AC 3 Gnd 0 4 Gnd 23 DEFLECTION POLARITY up 50 volt scale 4 Gnd 20 DEFLECTION POLA...

Страница 28: ...V22 pin 8 5 2AC 4 6 Gnd 280AC 8 Gnd 325 V23 2 V23 pin 8 5 2AC 4 6 Gnd 280AC 8 Gnd 325 V24 1 6 Gnd 335 3 V24 pin 4 6 5AC 4 7 Gnd 280AC V25 1 450 18 2 3 Gnd 450 4 V25 term 3 6 5AC 5 6 Gnd 680 V26 1 225 1 3 2 7 225 0 3 V26 pin 4 6 5AC 5 450 18 6 225 46 V27 1 4 225 38 2 5 Gnd 325 3 6 Gnd 225 7 Gnd 6 5AC 8 Gnd 0 V28 1 Gnd 87 2 7 Gnd 89 3 Gnd 0 4 Gnd 6 5AC 5 225 38 6 Gnd 137 V29 1 Gnd 89 4 Gnd 0 V30 2 G...

Страница 29: ...Gnd 0 5 6 V2 pin 8 0 7 225 10K V4 1 Gnd 0 2 Gnd 0 3 Gnd 0 4 Gnd 75K 4 225 75K 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 9 5K V5 1 Gnd 0 2 Gnd 0 3 Gnd 0 4 Gnd 200K 4 Gnd 2 2M 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 4 5K 8 V4 pin 4 80K V6 1 5 140 35M 2 3 7 Gnd 0 4 Gnd 0 V7 1 1 7 225 14 7K A B 2 140 65K 2 225 70K 3 4 5 Gnd 0 6 450 0 8 Gnd 47K V8 1 2 225 10K 3 Gnd 0 SWEEP SWEEP TRIGGER AMPL clockwis...

Страница 30: ... 3 Gnd 0 4 Gnd 0 6 7 Gnd 0 1 V12 pin 5 180 2 7 140 1 IK 2 7 V14pin2 900 3 Gnd 0 4 Gnd 0 5 6 450 25K 1 Gnd 0 HOR POSITION clockwise 1 Gnd 90K HOR POSITION counter clockwise 2 7 140 11K 3 Gnd 0 4 Gnd 0 5 6 450 25K 1 450 0 2 3 450 2 4 450 0 5 450 0 6 450 240K to 480K depending on setting of R 42 6 450 0 with SWEEP RANGE set at 1 microsec 7 V9 pin 8 200K SWEEP SPEED MULT 1 0 7 V9 pin 8 2 2M SWEEP SPEE...

Страница 31: ... access panel 0 14 V20 pin 1 2 V21 1 T1 term 7 0 2 3 7 T1 term 11 0 4 T1 term 10 0 6 T1 term 9 0 V22 2 T1 term 13 0 4 6 T1 term 14 0 8 225 IK V23 2 V22 pin 2 0 4 6 T1 term 16 0 8 V22 pin 8 0 V24 1 6 140 4 5K 3 T1 term 17 0 4 7 T1 term 16 0 V25 1 V25 pin 5 470K 2 3 T1 term 6 0 4 450 0 5 6 V21 pin 7 0 SIGNAL CALIBRATE switch in SIGNAL position SIGNAL CALIBRATE switch in 100 v position INPUT CHAN SEL...

Страница 32: ...tting of R165 2 V32 1 3 4 5 6 7 8 Gnd 50M 2 V32 pin I 1 Cap V33 pin 3 0 V33 1 3 4 5 6 7 8 Gnd 1 3K 2 V33 pin 1 1 Cap Gnd 9M TRANSFORMER CONTINUITY T1 Measured with leads disconnected Terminals Ohms Resistance 20 C 1 to 3 1 7 2 to 4 1 7 5 to 6 3 7 to 8 147 8 to 9 150 10 to 11 27 12 to 13 03 14 to 15 10 8 15 to 16 10 9 16 to 17 21 18 to 19 025 20 to 21 6 1 22 to 23 42 24 to 25 25 T2 Measured with V3...

Страница 33: ... in control settings of the 511 A under test 6 Line voltage variations DEFLECTION POLARITY SELECTOR WAVEFORMS Normal operation of this circuit for observation of pulses is shown in the following photographs The saw tooth pulse has a duration of 1 millisecond and a 60 cycle repetition rate Fig 2 Same pulse with DEFLECTION POLARITY switch in center position Note that position of the step is unchange...

Страница 34: ...Amplitude 15 volts Fig 8 Waveform at V31 plate Amplitude 350 volts Fig 7 High voltage supply oscillator waveform at V31 grid Amplitude 75 volts SWEEP AND TRIGGER CIRCUIT WAVEFORMS Fig 10 Multivibrator waveform at V4 plate controls set for 10 µsec recurrent sweep Amplitude volts Fig 9 Multivibrator waveform at V4 grid with con trols set for 10 µsec recurrent sweep Amplitude 70 volts TYPE 511 A 511 ...

Страница 35: ...e 45 volts Fig 15 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 16 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 18 Unblanking pulse at V7 cathode 10 µsec re current sweep Amplitude 65 volts Fig 17 Unblanking pulse at V7 cathode 1000 µsec recurrent sweep Amplitude 70 volts Fig 20 Waveform at V9 grid 10 µsec recurrent sweep Amplitude 50 volts Exposure m...

Страница 36: ...et ting of SWEEP MAGNIFIER POSITION control Amplitude 30 volts Fig 24 Amplified sweep sawtooth at XI deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 26 1 µsec negative pulse at V1 grid from either video amplifier or TRIGGER INPUT Amplitude 5 volt Fig 25 Amplified sweep sawtooth at X2 deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 27 The same pulse at V2 grid Nega...

Страница 37: ...e square wave when low frequency compensation is insufficient also in dicating need for L F adjustment Fig 33 Response to 1 megacycle square wave showing overshoot due to excessive high frequency com pensation Readjustment is indicated Fig 34 Response to 1 megacycle square wave showing the effect of insufficient high frequency compen sation Fig 35 Normal response to 1 kilocycle square wave Fig 36 ...

Страница 38: ...ly clipped sine wave at pins 2 6 and 7 of Calibrator Limiter V16 1 Amplitude ap proximately 300 volts depending upon line voltage Fig 37 2 Positively and negatively clipped sine wave at pin 3 of Calibrator Limiter V16 1 Ampli tude 100 volts as set by potentiometer R75 4 CAL ADJ TYPE 511 A 511 AD SECTION 4 PAGE 18 ...

Страница 39: ...ERN The RC compensated attenuator used in the Type 511A is really two attenuators in parallel one a re sistive divider and the other a capacity divider The ratio of the resistive divider is maintained by the use of accurate resistors Since the stray capacities are not negligible compared to the values used in the capacity divider each divider incorporates a variable ceramic trimmer capacitor in on...

Страница 40: ... electrolytic condensers it may be occasionally necessary to cor rect for a change in their capacity This is easily done by observing the response to a low frequency square wave 30 60 cycles and making the following adjust ments 1 With the INPUT CHAN SEL at 1 STAGE adjust R116 the rear LF ADJ so that the best waveshape is obtained 2 Move to the 2 STAGES position and adjust R99 the front LF ADJ BE ...

Страница 41: ...Fig 41 Input Probe disassembled SECTION 4 PAGE 21 TYPE 511 A 511 AD ...

Страница 42: ...Fig 42 Interior view right front side TYPE 511 A 511 AD SECTION 4 PAGE 22 ...

Страница 43: ...Fig 43 Interior view left side SECTION 4 PAGE 23 TYPE 511 A 511 AD ...

Страница 44: ...TYPE 511 A 511 AD SECTION 4 PAGE 24 ...

Страница 45: ...Tf S 4 t C15C C15D ...

Страница 46: ...R30 1 SECTION 4 PAGE 25 TYPE 511 A 511 AD ...

Страница 47: ...1 1 Fig 46 Video Amplifier top C51 Fig 47 Video Amplifier bottom TYPE 511 A 511 AD SECTION 4 PAGE 26 ...

Страница 48: ...SECTION 4 PAGE 27 TYPE 511 A 511 AD ...

Страница 49: ...11 A 511 AD SECTION 4 PAGE 28 TOP VIEW OUT BOTTOM VIEW Fig 51 Vertical Attenuator bottom Fig 50 Vertical Attenuator top RI23 RI2O 2 RI20 I RI2O R119 1 RII9 Fig 52 Deflection Polarity Switch and Terminal Board ...

Страница 50: ...SECTION 4 PAGE 29 TYPE 511 A 511 AD L24 ...

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Страница 52: ...0 400 WVDC C12 Fixed Mica or Cer 47 µµf 10 400 WVDC C13 Fixed PT 01 µf 20 600 WVDC C14A B Fixed EMC 2x20 µf 20 50 450 WVDC C15AA Fixed Mica or Cer 12 µµf 10 400 WVDC C15A Var Cer 7 45 µµf 500 WVDC C15B Fixed PT 920 µµf 1 Selected 400 WVDC 27 C15C Fixed PT 01 µf 1 Selected 400 WVDC 27 C15D Fixed PT 1 µf 1 Selected 400 WVDC 37 C15E Fixed PBT 1 µf 1 Selected 400 WVDC 2 55 C17 Fixed PT 1 µf 10 400 WVD...

Страница 53: ...C C50 Fixed PT 1 µf 20 400 WVDC C51A B Fixed EMC 2x20 µf 10 450 WVDC 2 38 C52A B Fixed PBT 2x 05 µf 20 400 WVDC C53 Fixed PT 1 µf 20 400 WVDC C54 Fixed Cer 1000 µµf GMV 500 WVDC C55 1 Fixed PT 1 µf 20 400 WVDC C56 Fixed PT 1 µf 20 400 WVDC C58 Fixed PT 1 µf 20 2000 WVDC C59 Fixed PT 1 µf 20 2000 WVDC C60 Fixed PT 1 µf 20 400 WVDC C65 Fixed EMC 40 µf 2x20 20 50 450 WVDC C66 Fixed EMC 40 µf 2x20 20 ...

Страница 54: ...p 1 watt 15 K 10 R15 Fixed Comp 1 2 watt 47 ohm 10 R16 Var Comp 1 4 watt 100 K 20 R17 Fixed Comp 1 2 watt 100 K 10 R18 Fixed Comp 1 2 watt 220 K 10 R19 Fixed Comp 1 2 watt 47 ohm 10 R20C Var Comp 2 watt 220 K 20 R20D Var Comp 2 watt 220 K 20 R20C D replacement furnished only with hand calibrated sweep speed dial 8 38 R20C1 to 9 Fixed Comp 1 2 watt 220 K 10 R20D1 to 9 Fixed Prec 1 2 watt 200 K 1 ea...

Страница 55: ...1 2 watt 10 meg 10 R56 2 Fixed Comp 1 2 watt 22 meg 10 R57 Var Comp 1 4 watt 100 K 20 R58 Fixed Comp 1 2 watt 4 7 K 10 R59 Fixed WW 10 watt 25 K 5 Inductive R60 Fixed Comp 1 2 watt 180 ohm 10 R61 Fixed Comp 2 watt 4 7 K 10 R62 Fixed Comp 1 watt 1 2 K 10 R63 Fixed WW 10 watt 25 K 5 Inductive R64 Fixed Comp 1 2 watt 180 ohm 10 R65 Fixed Comp 1 2 watt 560 ohm 10 R66 Fixed Comp 1 2 watt 560 ohm 10 R67...

Страница 56: ...220 K 10 R99 Var Comp 1 4 watt 500 K 20 R100 Fixed Comp 1 2 watt 220 K 10 R101 Fixed Comp 1 2 watt 10G ohm 10 R102 Fixed Prec 1 2 watt 1 meg 1 40 R103 Fixed Comp 1 2 watt 68 K 10 R104 Fixed Comp 2 watt 680 ohm 10 R105 Fixed WW 5 watt 2 K 5 R106 Fixed Comp 2 watt 820 ohm 10 R107 Var Como 1 4 watt 500 ohm 10 Limited Rotation R108 Fixed Comp 1 2 watt 150 ohm 10 R109 Fixed Comp 1 2 watt 1 meg 10 R110 ...

Страница 57: ...ed Comp 1 2 watt 1 5 meg 10 R137 Fixed Comp 1 2 watt 1 0 meg 10 R138 Fixed Comp 1 2 watt 120 K 10 R139 Fixed Comp 2 watt 4 7 meg 10 R140 Var Comp 1 4 watt 2 meg 20 R141 Fixed Comp 1 2 watt 1 5 meg 10 R142 Var Comp 1 4 watt 500 K 20 R149 Fixed WW 25 watt 1 K 5 R150 Fixed Comp 1 2 watt 470 K 10 R151 Fixed Comp 1 2 watt 150 K 10 R152 Fixed Comp 1 2 watt 47 K 10 R153 Fixed Comp 1 watt 220 K 10 R154 Fi...

Страница 58: ...170 V tapped at 25 V approx 2 KC Secondaries 280 0 280V 250 ma 260 0 260V 30 ma insulated for 700 VDC 5 V 4 A insulated for 500 VDC 6 3 V 6A insulated for 500 VDC 6 3V 6A insulated for 650 VDC 6 3 V 6A insulated for 350 V R M S 6 3 V 3A insulated for 250 VDC 6 3 V 6A insulated for 1500 VDC 6 3 V 11 A ground 35 4 V R M S ground 30 50 Secondaries 1250 V at 1 ma 1 4 V 2A connected to 1250 V winding 1...

Страница 59: ...VR150 High Voltage Oscillator 6AQ5 High Voltage Rectifier 1B3GT 8016 High Voltage Rectifier 1B3GT 8016 MISCELLANEOUS A510 Binding Post Adapter 1 88 B24 Binding Post bakelite 49 B21 Binding Post ground 34 Fl15 Filter green plastic 90 FSB4 3 Fuse 4AG 3 amp slow blowing 15 GR511A Graticule clear plastic 1 50 GC510 Graticule cover 50 KNF22 Knob 11 16 10 KNS48 Knob 1 1 2 skirted 39 NG12 Nut graticule 0...

Страница 60: ...SECTION VI DIAGRAMS See also additional informations and enlarged dia grams inside back cover TYPE 511 A 511 AD ...

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Страница 62: ...EXT BLOCK DIAGRAM OF TYPE 5IIA CATHODE RAY OSCILLOSCOPE 7 13 51 ...

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Страница 64: ...SWEEP MAGNIFIER SWEEP AMPLIFIER ...

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Страница 66: ...E 225V 140V 511A OSCILLOSCOPE TYPE VERTICAL AMPLIFIER TO SIA INY SYNC R76 2 X 13 2K AVERAGE SUPPLY CURRENT AT CHASSIS TERMINAL BLOCK 140V SUPPLY 0 6MA 225V SUPPLY 125 MA CAPACITOR ______ _ ____ ARE IN PICOFARADS lO FARADS VALUES LESS THAN I ARE IN MICROFARADS IO 6FARADS UNLESS OTHERWISE STATED R05 500K VW S 9 VI9 6AG7 NETWORK j IN AD s 2 MODELS 1600V jCSIA Tsmf V16 I I2AT7 1C39B R98 220K C45B RIO ...

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Страница 68: ...K NOTE 20 21 IN SERIAL NO 2867 8 ABOVE fr 6 6 3V II bi 3V TO S7 VIA TERMINAL STRIP 0068 RI7I 820K RI72 82OK TO 24 25 TI 0 I800V 0 I500V 6JV CRT FH_ O 600V 6 3V O 450V 0 2 25V O I40V O6 3V 0X10 CAL O S7 O AVERAGE CURRENT AT TERMINAL STRIP 225V SUPPLY I90MA 140V SUPPLY 28 MA POWER SUPPLY TYPE 511A CATHODE RAY OSCILLOSCOPE 6 20 5U ...

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Страница 70: ...eeded it may be re moved from the circuit by means of a rotary switch operated from the front panel ADJUSTMENT AND MAINTENANCE If the Vert Ampl Atten potentiometer R107 or the limiting resistor R108 are replaced it may be necessary to change the delay network shunt resistance so that the correct termination is maintained To check for proper termination set the sweep speed at 3 to 10 microseconds a...

Страница 71: ... Ceramic 1 5 7 mmf 10 500 WVDC INDUCTORS L1 to L23 Fixed L24 Variable RESISTORS R1 Fixed Composition watt 270 ohm 10 R2 Fixed Composition watt Selected SWITCH S1 l AD 25 in out DPDT Rotary RELAY Type l D 25 Only RL1 l D 25 Type 227A DPDT 32VDC 1000 ohm NOTE L l TO L 12 INCLUSIVE ARE COAXIALLY WOUND ON THE SAME COIL FORM L I3TOL 23 ti TYPE 511 A 511 AD SECTION 7 PAGE 2 ...

Страница 72: ... under this warranty is limited to the repair or replacement of the instrument or any part thereof fail ure of which is not due to abuse For service under this warranty promptly advise the factory of all details pertinent to the failure Replace ment parts will be shipped via air transportation upon request prepaid to any point within the continental United States or Canada Should it be more conven...

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