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Tektronix TYPE L Instruction Manual
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Tektronix TYPE L Instruction Manual

Tektronix TYPE L Instruction Manual

Plug-in unit
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NSTRUCT ON
MANUAL
ektronix, Inc.
.W. Millikan Way
•
ektronix International A.G.
Terrassenweg 1A
•
Zug,
070-336
P. O. Box 500
•
Beaverton, Oregon
witzerland
•
PH. 042-49192
•
Phone Ml 4-0161
•
•
Cable: Tekintag, Zug
witzerland
Cables: Tektronix
•
Telex 53.574

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Summary of Contents for Tektronix TYPE L

  • Page 1 NSTRUCT ON MANUAL ektronix, Inc. .W. Millikan Way • P. O. Box 500 • Beaverton, Oregon • Phone Ml 4-0161 • Cables: Tektronix ektronix International A.G. Terrassenweg 1A • Zug, witzerland • PH. 042-49192 • Cable: Tekintag, Zug witzerland •...

  • Page 2: Warranty

    WARRANTY All Tektronix instrument s a re warranted against defective materials and workman ­ ship for one year. Tektronix transformers, manufactured in our own plant, are war ­ ranted for the life of the instrument. Any questions with respect to the war ­...
  • Page 3 CONTENTS Warranty ection 1 Characteristics ection 2 Operating Instructions ection 3 Circuit Description ection 4 Maintenance ection 5 Calibration Procedure ection 6 Parts List and chematics Type L ttp://manoman.sq ill.com...
  • Page 4 ttp://manoman.sq ill.com...
  • Page 5 01X1 1 CHARACTER ST CS In Unit, plus a fast-rise high-gain ac amplifier eneral Information which may be used to increase the sensitivity ype L Plug-In is a fast-rise, high by a factor of 10. gain, calibrated preamplifier designed for use his instrument was adjusted at the factory with the ektronix 530-, 540-, 550- and * 5 80-...
  • Page 6 DC and 10 nanoseconds in X10 GAIN AC. Input Impedance Characteristics able 1-1 summarizes risetimes and frequency ype L Plug-In Unit: 1 Megohm shunted by responses available when the L Unit is used in combination with various types of ektronix 20 picofarads.
  • Page 7 01X1 2 OPERAT NG NSTRUCT ONS 2. Set the front-panel controls as follows (con ­ Markings and Functions of Controls trols not mentioned may be in any position): he functions of the controls should be understood before operating the L Unit. Oscilloscope: section of the Instruction Manual is intended to aid in initially putting the instrument into...
  • Page 8 VARIABLE -- Control VOLT /CM — Nine - provides continuously position switch selects variable attenuation be ­ calibrated vertical sensitivities indicated on tween steps of VOLT / panel. Black numbers switch. Extends used for AC and DC; blue attenuation to provide numbers for x10 GAIN sensitivity to 50 V /cm i n AC and DC;...
  • Page 9 Beam Indicator neons are unlit, the trace of the VARIABLE control no longer affects is approximately centered. the position of the trace. Return the VARIABLE control to the CALIBRA ED position, fully 6. Rotate the IN ENSI Y control clockwise clockwise.
  • Page 10 However, it is often neither necessary nor a resistance of 1 Megohm shunted with a capacitance of 20 picofarads. With a few desirable to display the de component of the feet of shielded cable, the capacitance may input waveform. A capacitor which is in series well be increased to 100 picofarads.
  • Page 11 NCORRECT RECT NCORRECT Fig. 2-2. Waveforms for adjustment of probe compensation. ment to warm up (15 min.) after the POWER particular signal, the following method may has been turned ON. be used: 2. Connect the probe cable to the INPU con ­ 1.
  • Page 12 5. he final number is the voltage difference Adjust the oscilloscope triggering controls for a stable display. If the amplitude of the signal between the maximum and minimum peaks is inconveniently large or small, reset the of the input signal. DEFLEC ION x VOL S/CM VOL S/CM switch for a more suitable value ENUA ION = VOL AGE.
  • Page 13 SECT ON 3 C RCU T DESCR PT ON eneral he attenuators are frequency-compensated voltage dividers. At low frequencies, the capacitors have a high impedance and their ype L Plug-In Unit is a fast-rise effect in the circuit is negligible--the atten ­ preamplifier incorporating a fast-rise high- uators act as resistive dividers with the atten ­...
  • Page 14 he screen grid of the First Cathode Follower For proper operation of the X10 amplifier, is at 4-100 volts with only the main amplifier it is important that the Second Amplifier, V6042, of the unit in operation. When the X10 Ampli ­ be operated on a certain portion of its character ­...
  • Page 15 done with the VARIABLE A EN. BAL. con ­ results in a vertical displacement of the crt beam. trol, R6812, which adjusts the voltage on the control grid of V6342, thereby regulating current Minimum capacitive loading to the plate through the tube and setting the voltage on circuit of the Phase Inverter Stage is assured the cathode.

  • Page 16: Preventive Maintenance

    01X1 4 MA NTENANCE PREVENTIVE MAINTENANCE Switches If a switch is found to be defective and he L Unit is a stable instrument, and will require complete calibration very infrequently. needs to be repaired or replaced, use normal However, to be certain that the unit is operat ­ care in unsoldering and disconnecting leads ing properly at all times, the calibration of from the terminals.

  • Page 17: Replacement Parts

    chassis and remove the terminal strip. Screw chassis. Using a plastic or hard rubber mallet, tap the ceramic strip lightly above the mounting a #2-56 nut onto each bolt of the new strip, positioning the nut so that the distance between clips to drive the pins down through the spacers.

  • Page 18: Troubleshootin

    than required to obtain them from the factory. A schematic diagram of the L Unit is con ­ tained in the rear portion of this manual. Before purchasing a part, be sure to consult he reference designation of each component the Parts List to determine the tolerances and rating required.
  • Page 19 current. Shorted tubes will often overload Inverter Stage (V6242-V6342) to the Output plate-load and cathode resistors. Stage (V6632), a component failure anywhere between these two points can unbalance the amplifier and cause a loss of the trace. A Troubleshooting Procedures d c unbalance can be caused by defective tubes , It will be necessary to turn the oscilloscope defective cathode, screen or plate resistors,...
  • Page 20 stage, an open circuit ahead of the coupling be investigated to locate the defective components. capacitor will not affect the d c balance. When the grids of the Phase Inverter Stage If the trouble is originating in the main amplifier section, it can be isolated to either are shorted together, the effect of the vertical positioning controls must be considered.
  • Page 21 or two ranges, check the compensation of the ( he main amplifier is dc-coupled, and its input attenuators. If the distortion occurs on response is therefore flat down to de.) all ranges, first check the compensation of the probe used. In signal tracing for high- Low-frequency attenuation will produce the frequency distortion, consider the loading effect type of distortion illustrated in Fig.
  • Page 22 of distortion illustrated in Fig. 4-3(a). important in maintaining the proper risetime. An open condition in either capacitor will transconductance of the tubes is very important seriously affect the high-frequency response. in maintaining good high-frequency response. For this reason, the tubes themselves are he overshoot condition, illustrated in Fig.
  • Page 23 01X1 CAL BRAT ON PROCEDURE Introduction Equipment Required he following equipment or its equivalent is required to perform a complete calibration of the ype L Plug-In Unit. A complete procedure for checking the operational standards and calibration of the est Oscilloscope, ektronix 540- or 550- ype L Plug-In Unit is provided in this section Series.
  • Page 24 10. Plug-In Extension, ype EP54 (013-019) MA ISM and IN ENSI Y controls to obtain a sharp trace with adequate intensity. Allow 11. Low-capacitance insulated alignment tools. at least 15 minutes warm-up before making any adjustment changes. 12. Resistive shorting strap, approximately 16 inches long.
  • Page 25 at the interconnecting plug between pin 1 and no longer affected by the VARIABLE (VOL S/ ground, and between pin 3 and ground. CM) control. Return VARIABLE control to voltage should be between +65 and +70 volts CALIBRA ED position, on each pin.
  • Page 26 connector of the L Unit, and a 5X Attenuator With the AC-DC switch in X10 GAIN AC Apply a 1 kc signal on the Standardizer. position, check the voltage drop across R6072 with a P52 cable from a ype 105 Square- for exactly 55 volts.
  • Page 27 YPE L ext Correction (13) Replace the second paragraph of step 13 and the first paragraph of step 14 with the following. Remove the ype EP54 Plug-In Extension for this step. Now set the AC-DC switch in DC position and the VOL S/CM switch at .05. Install a 20 pf Input Capacitance Standardizer on the INPU connector of the L Unit, and 5X Attenuator on the Standardizer.
  • Page 28 C5222 C5292 C5272 C5362 C5342 CM12 C5S02 C5ftO2 V©rt. Kanjcr H6572 VeOU CathocW Current Adj, IW22 Low Freq Adj ROIB2 , 5-2. Lovailon of left -wide Internal adjustment* and Input attenuator adjuftmenta, connector of the ype L Unit. Apply a square Set the 1ME/CM switch at 50 MILLISEC, wave of approximately 450 kc from a ektronlx...
  • Page 29 waveform, with fastest risetime but no over ­ ype 190( ) for exactly three centimeters of shoot. vertical deflection. Without changing any other controls, Increase the output frequency of the 18. Check Frequency Response ype 190( ) until the vertical deflection is reduced to exactly 2.1 cm.
  • Page 30 PARTS L ST SCHEMAT CS ABBREV AT ONS Cer. Ceramic Nano or IO -9 Comp. Composition Electrolytic, metal cased Pico or 10- 12 Farad Paper, "Bathtub" Giga, or 10 ’ Paper, metal cased Guaranteed minmum value Poly. Polystyrene Henry Prec. Precision K or k Kilohms or kilo (1 0 3 )
  • Page 31 Parts List and Schematics — Type L HOW TO ORDER PARTS Replacement parts are available from or through your local Tektronix Field Office. Changes to Tektronix instruments are sometimes made to accommodate improved com ­ ponents as they become available, and to give you the benefit of the latest circuit im ­...
  • Page 32 Parts List — Type L PARTS L ST Values are fixed unless marked Variable. Capacitors Tolerance ±20% unless otherwise indicated. Tolerance of all electrolytic capacitors are as follows (with exceptions): - 50 V = -10% + 250% 51 V -350V= -10% + 100%...
  • Page 33 Parts List — Type L Capacitors (continu d) Tektronix Ckt. No. Part Number Description 40 μF C6002A 20 μF 475 v C6002B 290-063 10 μF C6002C .01 μF Discap 150 v C6062 283-003 C6072 3 x 75 μF 150 v 290-069 .005 μF...
  • Page 34 Parts List — Type L Resistors (continu d) Tektronix Ckt. No. Part Number Description /N Range R5112 309-148 1 meg '/ 2 w Prec. R5162 309-141 750 k '/ 2 w Prec. R5172 309-139 333 k '/ 2 w Prec.
  • Page 35 Parts List — Type L Resistors (continu d) Tektronix Description /N Range Ckt. No. Part Number 22 k R6132 305-223 R6142 302-470 47 0 y 2 w R6172 302 474 470 k y 2 w 101-1609 302-334 330 k y 2 w 161 0-up Low Freq.
  • Page 36 Parts List — Type L Switches Tektronix /N Range Ckt. No. Part Number Description Unwired Wired AC-DC XIO Gain W5002 * 2 60-173 Rotary Volts/CM W5052 * 2 60-172 * 2 62-133 Rotary Electron Tubes 56544 154-084 V5832 56544 V5942...
  • Page 37 Parts List — Type L Mechanical Parts List Type L Tektronbi Part Number BINDING PO T CAP 200-103 BINDING PO T ADAPTER 355-507 BRACKET, VERT. PO . RANGE 406-126 BRACKET, HF PEAKING 406-186 BRACKET, 2%x3 406-264 406-265 BRACKET, % x2 3 / 1(...
  • Page 38 Parts List — Type L Mechanical Parts List (continu d) Tektronix Part Number LOCKWA HER %x 1l / u INT. 210-013 LUG, OLDER 210-201 LUG, OLDER E6 w/2 holes 210-202 210-204 LUG, OLDER DE6 210-205 LUG, OLDER 210-207 LUG, OLDER Pot, %...
  • Page 39 Parts List — Type L Mechanical Parts List (continu d) Tektronix Part Number CREW 6-32 x 5 / 16 Pan H w/lockwasher 211-534 CREW, 8-32 x % BH 212-001 CREW 8-32 x '/ 2 FH Phillips 212-043 CREW 8-32 x'/ 2 RH...
  • Page 40 [<5372 K5652 R5292 -R5222 — 1(5162 — C5I72 1(5092 — R5042 (.15092 (15042 1(5052 1(5722 (15/ 22 R GHT S DE VOLTS/CM SW TCH 1(5652 1(5552 1(537 2 1(5462 1(5362 1(5002 1(5732 1(57 22 C5722 LEFT S DE VOLTS/CM SW TCH ttp://manoman.sq ill.com...
  • Page 41 SECOND FIRST AMPLIFIER SECOND C.E AMPLIFIER V6042 CATHODE -CURRENT ADJ. V6I3Z L6H2 V604Z 56S4 R6&32 c % ,,£ ■XKSfH J1 "' OUTPUT PHASE. INVERTER ■■ — STAGE — J-C6002C STAGE V594Z /Off 5654 LOW FREQ. (26042^ +100V +3&0V C6062 -±7 -■...