Tektronix 315D Series Instruction Manual
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Tektronix 315D Series Instruction Manual

Tektronix 315D Series Instruction Manual

Cathode-ray oscilloscope
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CATHODE-RAY OSCILLOSCOPE
TYPE 315D
SERIAL N U M B E R _______________
INSTRUCTION
MANUAL
M A N U FA C T U R E R S O F CATHODE-RAY A N D V ID E O TE ST I N S T R U M E N T S
Sunset Highway and Barnes Road • P. O. Box 831 • Portland 7, O regon, U. S. A.
Phone: CYpress 2-2611
• Cables: Tektronix

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  • Page 1 M A N U FA C T U R E R S O F CATHODE-RAY A N D V ID E O TE ST I N S T R U M E N T S Sunset Highway and Barnes Road • P. O. Box 831 • Portland 7, O regon, U. S. A. Phone: CYpress 2-2611 • Cables: Tektronix...

  • Page 2: General Description

    General Description Accommodates slowest sweeps. athode Flat-faced high definition three-inch tube. The TEKTRONIX Type 315D cathode-ray oscil­ loscope is a small compact and portable high-perform­ ance laboratory instrument particularly designed to raticule occupy minimum space. The vertical bandwidth ex­...
  • Page 3 Functions of Front-Panel Terminals 5X MAGNIFIER Two-position switch turns time- (Red label, base magnifier on in clockwise po­ and Controls red knob) sition, returns time base to normal in counterclockwise position. ertical mplifier CALIBRATOR Five-position switch selects four fixed peak-to-peak squarewave M ULTIPLIER Four-position switch to multiply voltages of 0.1, 1, 10, or 100 volts.
  • Page 4 AMPLITUDE and the MULTI­ PLIER scale readings. The TEKTRONIX Type 315 Oscilloscope may be In the most counter-clockwise position of the operated in any indoor location or in the open if it is MULTIPLIER selector, a continuously-variable gain protected from moisture.
  • Page 5 one microsecond, the TRIGGER SELECTOR should HORIZ. POSITIO N ......CENTER be placed in one of the SLOW RISE positions of the VERT. POSITIO N ......CENTER scale. In these positions of the control, a regenera­ tive trigger generator produces sharp triggers suitable TIME BASE M ULTIPLIER......
  • Page 6 generator, which is determined by the gain between put triggers is dependent on the differentiated rise 01 halves of this generator. There is no front-panel con­ the triggering waveform. For slow-rising waveforms, trol of this gain, but there is an internal screwdriver therefore, the output trigger will be too small to trip adjustment which should not be changed, however, the time-base generator.

  • Page 7: Circuit Description

    regenerative transition in either direction for the slow­ SECTION III est risetime signals. The sharp trigger signal is capacitance coupled into V203, a cathode-coupled stage whose output is direct coupled through cathode follower V204A to the junc­ tion of the plate of V211A and the cathode of V211B of the cascode Eccles-Jordan multivibrator.
  • Page 8 the grid of V220 at about —3 volts through diode V21S Miller tube, V220, where the plate voltage is directly during the quiescent state of the multivibrator. The proportional to the grid voltage. The relationship of negative step from the multivibrator cuts off the 50 volts plate to —3 volts grid voltage is therefore cathode follower and the cathode falls, disconnecting determined by the grid to plate relationship of the...
  • Page 9 VERT POSITION, connected between ground and ertical mplifier +100 volts. R65 and R66 limit the positioning range. VI is a twin-triode with the two sections operated R90, a part of the coupling between cathodes of in parallel. The signal is taken from the common cathode connection of VI and applied to the cathode V10, V ll and V12, V13, is a screwdriver adjustable of V2A.
  • Page 10 positioning occurs when the multiplier switch connects paralleled for 117-volt operation, but they are ar­ larger of smaller resistors between them. ranged to be easily reconnected in series for 234-volt operation. Four selenium full-wave bridge rectifiers, each sup­ plied with ac from a separate section of the trans­ alibrator former secondary, provide dc to four electronic volt­...
  • Page 11 negative tendency. C404, bypassing R407, R409, and at the regulated bus. C461 increases the regulator ac part of R410, improves the ac gain of the comparator gain to reduce ripple. circuit and reduces ripple. R410 is adjustable by a R412, a front-panel control labeled SCALE ILLUM, screwdriver adjustment labeled 150 V ADJ on the is a variable resistor in series with the graticule illumi­...
  • Page 12 by the unblanking pulse. This arrangement provides will rise carrying V801B grid up with it. Plate cur­ dc coupling of the unblanking waveform to the con­ rent in V801B will increase, its plate will drop carry­ trol grid, thereby making it possible to use as slow a ing the screen of oscillator V803 down with it, thereby reducing the gain of this tube so that the oscillation sweep as desired.

  • Page 13: Maintenance And Adjustment

    Most of the components used in the construction of zvith a stream of hot water or steam. TEKTRONIX instruments are standard parts obtain­ ) If load is too heavy for treatment in ( ) above, able from any well-equipped parts distributor.
  • Page 14 TEKTRONIX instruments as soon as possible. As a proximately % turn to the left, and lift off the case. results of constant improvement TEKTRONIX in­ The power cord is not removable so it must be fed struments are always built as good as we can build through the hole as the cabinet is removed.
  • Page 15 amplifier. Also best results will be obtained change from one to the other if the need should arise. if the adjustments are made in the following If wired for the 60-cycle motor, the motor wires (grey) order: should go to terminals 1 and 3. If wired for universal line frequency, the wires should go to terminals 14 Amplifier Gain Adjustment and 17.
  • Page 16 .04 microseconds. A Adjust TEKTRONIX Type 104A or Type 105 Square-wave 3. Turn the M ULTIPLIER to the 10-1 posi­ Generator will provide a suitable signal. All connec­...
  • Page 17 Amplitude of Test Signal ing methods of adjustment will give satis­ factory results: 2. Apply a square wave of 750 kc to 1 me to the input of the Type 315 oscilloscope. Adjust the ampli­ Delay Network Test Signal tude of the square wave so that it causes a deflection 1.
  • Page 18 TEKTRONIX, INC., and be replaced as a group. the point where the oscillations just disappear. When ordering replacement parts be sure to men­...
  • Page 19 (V224 and V223) rately calibrated oscillator is required. A should be changed. suitable instrument is the TEKTRONIX TYPE 180 TIME-MARK GENERATOR. Mag. Centering 9. With the same setup as in step 7, position the Check (Constant-Current Tube) trace to the right with the HORIZ POSITION con­...
  • Page 20 Then the following procedure should be followed in marker generator for five-microsecond marks. Ob­ the sequence listed: serve the linearity of the sweep. Readjust C290, if necessary, so that each time mark has the same spac­ A. Set the TIME BASE RANGE to 10 MICRO- ing, without regard to timing.

  • Page 21: Front Panel

    ! ! ! ! ! i m m i h m •••••••••••••■••••••■•••I** a a a a a a a a a a a a a a a a f a a a i a a a a a a ---- •...
  • Page 22 MULTIPLIER TIME/DIVISION CALIBRATOR VOITS, PEAK TO PEAK TRIGGER AMPLITUDE DISCRIMINATOR - 1 0 4 1 0 CAL. O UT G N D . SERIAL TEKTRONIX, IN C ., PORTLAND, O R E G O N , U. S. A .
  • Page 23 ABBREVIATIONS Cer. ceramic milli or 10'3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10"6 watt H fi micromicro or 10*12...
  • Page 24 + 225V + 225V R603 820K CALIBRATOR TYPE 315 CATHODE-RAY OSCILLOSCOPE...
  • Page 25 ABBREVIATIONS Cer. ceramic milli or 10'3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10'6 watt micromicro or 10*12 fifi...
  • Page 26 TYPE 315 CATHODE-RAY OSCILLOSCOPE...
  • Page 27 £(U P 3 -1 6 -5 3 TIME BASE RANGE 8 MULTIPLIER SWITCH DETAIL Figure 3...

  • Page 28: Time Base

    ABBREVIATIONS Cer. ceramic milli or 10*3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10'6 watt micromicro or 10"12 wire wound...
  • Page 29 Resistors (Cont.) R253 100 k Fixed Comp. R254 50 k Var. Comp. 20% M ULTI STABILITY R255 120 k Fixed Prec. R260 700 k Fixed Prec. R261 50 k Var. Comp. 20% SW E E P LENGTH R262 47 k Fixed Comp.

  • Page 30: Vacuum Tubes

    Inductors L246 Fixed Wound on R246 Vacuum Tubes V203 6BQ7 Trigger Amplifier V204A Trigger Cathode Follower 546BQ7 V204B J46BQ7 Sweep Holdoff Cathode Follower V205A J412AT7 Clamp Diode V205B J412AT7 Sweep Holdoff V210A H6BQ7 Unblanking Cathode Follower V210B K6BQ7 Buffer Cathode Follower V211 Cascode Multivibrator 6BQ7...
  • Page 31 TIME BASE...
  • Page 32 ABBREVIATIONS Cer. ceramic milli or 10‘3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10"6 watt micromicro or 10'12 wire wound...
  • Page 33 Resistors (Cont.) 610 k Fixed Prec. Unassigned 4.3 k Fixed Comp. 5.6 k Fixed Comp. 5.6 k Fixed Comp. Fixed Comp. 47 0 Fixed Comp. 27 k Fixed Comp. 33 k Fixed Comp. 150 0 Fixed Comp. 100 0 Fixed Comp.
  • Page 34 1 0 0 ♦ ON p o w e n SUPPLY IW PUT PR.EAMP i-is-sa .» H T Y P E C A T H O D E - R A Y O S C IL L O S C O P E Figure 5...

  • Page 35: Power Supply

    ABBREVIATIONS milli or 10‘3 Cer. ceramic composition Comp. paper, metal cased electrolytic, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision paper tubular henry working volts dc kilohm or 103 ohms megohm or 106 ohms Var. variable micro or IQ'6 watt micromicro or 10'12 wire wound...
  • Page 36 Resistors (Cont.) R462 150 k Fixed Comp. R463 1.8 meg 54 w Fixed Comp. R464 1.8 meg Fixed Comp. R465 1.5 k 25 w Fixed R467 1.8 meg Fixed Prec. R468 750 k Fixed Prec. Switches SW401 Single Pole Single Throw Toggle P O W E R Vacuum Tubes...
  • Page 37 POWER SUPPLY TYPE 315 CATHODE-RAY OSCILLOSCOPE Figure 8...

  • Page 38: Vertical Am Plifier

    ABBREVIATIONS Cer. ceramic milli or 10'3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10'6 watt micromicro or 10"12 wire wound...
  • Page 39 Resistors (Cont.) Fixed Comp 12 0 Comp. 47 0 Fixed Comp. 47 0 Fixed 12 k Fixed Comp. 470 k Fixed Comp. Comp. 12 k Fixed 220 k Fixed Prec. 22 k Fixed Comp. 22 k Fixed Comp. 20% VERT. PO SIT IO N 250 k Var.
  • Page 40 I — ----aswpj _ C5IIE _ C B 2 I A _ , C $ O t A _ L C 5 9 2 6 » 02 C _ L C 5 0 2 D J _ C * 0 2 t C ftllA „...
  • Page 41 ABBREVIATIONS Cer. ceramic milli or lO"3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 103 ohms working volts dc megohm or 106 ohms Var. variable micro or 10'6 watt micromicro or 10' wire wound...
  • Page 42 s w e o i c s w e o io s w e o u s w e o i e s w e o ie V — - h ^ - , TRIGGER ^ELECTOR s e l e c t o r ! ---------------------------------------------- TYPE 315 CATHODE-RAY OSCILLOSCOPE SHAPER F i g u r e 2...
  • Page 43 ABBREVIATIONS Cer. ceramic milli or 10‘3 Comp. composition electrolytic, metal cased paper, metal cased farad Poly. polystyrene guaranteed minimum value Prec. precision henry paper tubular kilohm or 10s ohms working volts dc megohm or 106 ohms Var. variable micro or 10"6 watt H fi micromicro or 10'12...
  • Page 44 + 330V +350V UNRE6. +35 0 V C802 .001 TYPE 315 CATHODE-RAY OSCILLOSCOPE...

  • Page 45: High Voltage

    + 350 V HIGH VOLTAGE AND C R T CIRCUITS...

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