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Tektronix Type M Instruction Manual
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Tektronix Type M Instruction Manual

Tektronix Type M Instruction Manual

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IISISTRUCTIO I S !
IV 1 A IN I U / \ L _
Tektronix, Inc.
S.W. Millikan W ay
Tektronix International A .G .
Terrassenweg 1A
•
070-295
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P. O . Box 500
•
Beaverton, Oregon
Zug, Switzerland
•
PH .0 4 2 -49 1 92
™ M
PLUG-IN UNIT
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Phone Ml 4-0161
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Cable: Tekintag, Zug Switzerland
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Cables: Tektronix
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Telex 53.574

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Summary of Contents for Tektronix Type M

  • Page 1 P. O . Box 500 • Beaverton, Oregon • Phone Ml 4-0161 • Cables: Tektronix S.W. Millikan W ay Tektronix International A .G . Terrassenweg 1A • Zug, Switzerland • PH .0 4 2 -49 1 92 • Cable: Tekintag, Zug Switzerland •...
  • Page 2 Calibration Section 6 Accessories Parts List and Diagrams Section 7 Copyright © 1962 by Tektronix, Inc., Beaverton, Oregon. Printed in the United States of America. All rights reserved. Contents of this publication may not be re­ produced in any form without permission...
  • Page 3 WARRANTY All Tektronix instruments are warranted against defective materials and workman­ ship for one year. Tektronix transformers, manufactured in our own plant, are w ar­ ranted for the life of the instrument. Any questions with respect to the w ar­...
  • Page 4 GAIN N O RM . PO SITIO N V A R . G A IN GAIN n o r m PO SITIO N CHO PPED a lternate SERIAL POSHANO. 0 R650N, TEKTRONIX, INC The Type M Plug-In Unit Type M...
  • Page 5 C H A R A C T E R I S T I C S General Information four channels are equal, accurate time comparisons can be made between signals. The Type Plug-In Unit preamplifier contains four In the chopped mode of operation, channel switching identical channels that can be used separately or electron­...
  • Page 6 Characteristics— Type M Operating Modes Input Impedance Channels A, B, C, or D, separately. 1 megohm ± 1 % paralleled by approximately 47 pf. Chopped— Sequential electronic switching of channels at approximately 1-mc rate. Maximum Allowable Combined DC and Peak Alternate—...
  • Page 7 M Unit as follows: * A Type 81 Adaptor required Tor use with Types 581 and 585 Fig. 2-1. Front-panel view of the Type M Plug-in Unit showing the Oscilloscopes. grouping of the controls and connectors for each channel.
  • Page 8 CRT Cathode Selector switch (located at the such test leads are used, you must also use a ground con­ rear of most Tektronix oscilloscopes) to the Dual-Trace nection between the M Unit or oscilloscope chassis ground Chopped Blanking position.] and the chassis of the equipment under test.
  • Page 9 Operating Instructions— Type M merit should work into a load impedance equal to that the CALIB. position. Serious errors in display measurements which it will see in actual use. may result if the setting of this control is unintentionally moved aw ay from this position.
  • Page 10 Operating Instructions— Type A A ALTERNATE/CHOPPED Switch mode (if your oscilloscope has these positions). For lower frequency signals, use the AC or AC Slow triggering mode. In the AC Fast or AC LF Reject position, an rc filter is in­ single-trace operation ALTERNATE/CHOPPED...
  • Page 11 Following are three categories of voltage measurements of 10 results in the true peak-to-peak voltage of 0.8 volt. that can be obtained with the Type M Unit: (1) peak-to-peak voltage of a displayed waveform, (2) dc level at some point DC level at some point on a signal.
  • Page 12 VOLTS/CM switch. This is use­ feature of the Type M Plug-In Unit. To make phase com­ ful for comparing signals with a given reference. The fol­...
  • Page 13 8 0 ° can be made using this method. Time-Delay Measurements The calibrated sweeps of Tektronix oscilloscopes cause any horizontal distance on the screen to represent a definite known interval of time. Using this feature in combination...
  • Page 14 (also serves to trigger the cords are connected as described earlier, the noise ampli­ sweep), and a Tektronix P6017 Probe connected with the tude equals about 20 millivolts on the 200-millivolt channel-B cable end to the channel B, C, or D input connector and the waveform.
  • Page 15 INI 3 AMPLIFIERS input signal increases, however, the impedance of the capacitors decreases and their effect in the circuit becomes more pronounced. Introduction For high-frequency signals the impedance of the capaci­ tors is low, compared to the resistance of the circuit, and The M Unit consists of four identical input amplifiers, a the attenuators become capacitive voltage dividers.
  • Page 16 Circuit Description— Type M input signal at the base of Q5324 to a push-pull output millivolts at the transistor collectors. The voltage range corresponds to about ± 1 0 centimeters positioning range signal between the two collector circuits. Push-pull gain at the crt since direct coupling is employed.
  • Page 17 Circuit Description— Type M The signal is taken from the junction of R5326 and R5327 (1) All channels off. With all MODE switches set to located in the common-emitter circuit of Q5324 and Q5334. the OFF position, the Ring Counter is placed as close as The R5326-R5327 junction is a convenient low-impedance possible to a quiescent or static condition.
  • Page 18 Circuit Description— Type M pin 16 of the interconnecting plug to the collecter circuit may also be used as a troubleshooting aid when it is nec­ of Q6350. The trigger is regenerated by the blocking essary to locate the cause of trouble in these circuits. Since...
  • Page 19 Circuit Description— Type M Fig. 3-1. Simplified diagram of the Switching B.O and Chopped Mode Blanking Amplifier when the ALTERNATE/CHOPPED switch is set to ALTERNATE. Currents, voltages and waveforms are shown for single-trace operation. (During single-trace operation the Switching B.O.
  • Page 20 Circuit Description— Type M A S S U M E ; T H IS 1 2 .6 V S U P P L Y I S L X A C T L Y 1 2 . 6 V Fig. 3-2. Simplified diagram of the Switching B.O. and Chopped Mode Blanking Amplifier.
  • Page 21 Circuit Description— Type M + 2 2 5 V IS E X A C T L Y l ^ . f e V Fig. 3-3. Simplified diagram of the Switching B.O. and Chopped Mode Blanking Amplifier. Currents, voltages and waveforms are shown for four-trace chopped operation.
  • Page 22 HEATER CIRCUIT to the base of Q6364. The heaters in the Type M Plug-In Unit are supplied with direct current from the + 100-volt regulated supply in the oscilloscope. This prevents the possibility of 60-cycle cathode...
  • Page 23 It may also be purchased nectors, improperly seated tubes or transistors, scorched or directly from Tektronix in one-pound rolls (order by part burned parts, and broken terminal strips. The remedy for number 251-514).
  • Page 24 Maintenance— Type M 6. Do not attempt to fill the notch on the strip with solder; instead, apply sufficient solder to cover the wire adequately and to form a slight fillet on the wire, as shown in Fig. 4-3. In soldering to metal terminals (interconnecting...
  • Page 25 Maintenance— Type M Ceramic Terminal Strips Tektronix since they are normally difficult or impossible to obtain from other sources. All parts can be obtained through your local Tektronix Field Engineering Office. To remove a ceramic terminal strip, unsolder all com­...
  • Page 26 Maintenance— Type M Fig. 4-7. Right-side view and left-rear portion of the M Unit showing the location of all test points.
  • Page 27 Maintenance— Type M CAUTION Substituting an M or CA Unit is suggested because either of these units aids in isolating such troubles as loss of sync Do not substitute tubes or Nuvistors when the M or improper chopped-mode blanking to either the oscillo­...
  • Page 28 Maintenance— Type M that unbalances the output voltage more than 0.2 volt may c. If trace appears when shorting the bases of the tran­ cause a loss of all traces. sistors together but disappears when jumper is re­ moved, check for trouble in the base circuits of Q5324 One cause of dc imbalance is improper adjustment of and Q5334.
  • Page 29 Maintenance— Type M operation, this indicates trouble in the Switching B.O. and all channels, a change in gain characteristics of the Output Chopped Mode Blanking Amplifier, or a loss of sync from Amplifier is indicated. If tubes are causing the trouble, it the oscilloscope time-base generator.
  • Page 30 (a) Distortion— Signal applied directly. Set the VOLTS/CM switch to .02. Apply a fast-rise squarewave from a low- impedance signal generator, such as a Tektronix Type 105 Square-Wave Generator, to the input connector. If it is nec­ essary to attenuate the signal use a resistive (non-capacitive) divider.
  • Page 31 Maintenance— Type M 17. Switching Transients Visible in Chopped Mode 16. Waveform Distortion, All Channels switching transients visible during multi­ If you note waveform distortion on all channels when the trace chopped-mode operation, trouble in the same fast-rise step signal is applied to each, you can assume Chopped Mode Blanking Amplifier Q6364 stage (if you are the distortion is produced in the Output Amplifier.
  • Page 32 Maintenance— Type M NOTES 4-10 ®...
  • Page 33 A complete procedure for checking the operational stand­ plete calibration of the Type M Plug-In Unit. ards and calibration of the Type M Plug-In Unit is provided (1) Oscilloscope, Tektronix Type 540-, 550-, or *580- in this section of the manual.
  • Page 34 Calibration— Type M 1— Screwdriver, for screwdriver-adjust potentiometers. 1— Alignment tool, consisting of a handle (Part No. 003-307), nylon insert with wire pin (Part No. 003-308), and a hexagonal core insert (Part No. 003-310). PRELIMINARY PROCEDURE Before installing the M Unit in the oscilloscope, make a careful visual inspection of the wire dress.
  • Page 35 Calibration— Type M TABLE 5-1 Nominal Resistances at Interconnecting Plug Resistance Polarity of Meter Lead Remarks to Ground Connected to Ground Number 9.4 k H.F. PEAKING control*-ccw + or — 11.3 k H.F. PEAKING control*-cw + or — Connected to ground.
  • Page 36 Calibration— Type M and 8 of V5383. Note the exact position of the trace; this is To make the check use three short patch cords (6" long) the vertical-system electrical center of the oscilloscope. to connect the four inputs together, and use a fourth patch cord to ground the inputs.
  • Page 37 Calibration— Type M 12. Check Variable G ain Control (A ll Channels) TABLE 5-2 VOLTS/CM Switch Attenuation Check This step checks the operation of the VAR. G A IN con­ trol for each channel. Oscilloscope Vertical Amplitude VOLTS/CM Deflection Increase the signal amplitude of the oscilloscope Ampli­...
  • Page 38 Calibration— Type M Fig. 5-4. Adjusting the input capacitance and attenuator compensation: (a ) proper adjustment; improper input-capacitance adjust­ ment; (c) attenuator over compensated. Sweep rate: 0.5 millisec/cm. Maintain approximately 3 centimeters of vertical deflec­ Set the A VOLTS/CM switch to .02 and increase the...
  • Page 39 Calibration— Type M TABLE 5-4 Connect another short patch cord between the " A ” Square-W ave Response Check SIGN AL O U T connector and the channel B input connector. If the channel B trace is displaced from the A trace, care­...
  • Page 40 Calibration— Type M ( a ) (c ) H H ■ (d ) ( b ) Fig. 5-5. Checking the high-frequency compensation of the M Unit. Sweep rate: 0.1 /rsec/cm. Peaking circuits properly adjusted, (b) L5363 and L5373 properly adjusted— H.F. PEAKING control rotated fully clockwise, (cl Rolloff and (d) overshoot, caused by mal­...
  • Page 41 Calibration— Type M two centimeters of deflection for the channel B waveform. display on the screen. Adjust the oscilloscope Triggering Measure the time interval between the 10% and 90% Level and Stability controls to obtain a stable A and B amplitude levels on the rising portion of the squarewave.
  • Page 42 Calibration— Type M NOTES 5 - 1 0...
  • Page 43 COAXIAL CABLES Description | Part Number PLUG-IN EXTENSION EP54 Two UHF plug connectors. 50 Q nom­ Maintenance of the Type M Plug-In Unit can be made inal impedance. 42" long. RG-58A/U. 012-001 easier by using the Plug-In Extension pictured here. Fits Two UHF plug connectors.
  • Page 44 UHF SYSTEM TERMINATIONS to be down between 0 and 1.2 db at 30 megacycles. Rise­ Fittings: One UHF Plug-One UHF Jack time of probe (measured with a Tektronix Type 541 Oscillo­ Description Part Number scope with Type K Plug-In Unit): 12 to 14 nanoseconds.
  • Page 45 Accessories — Type M P6017-Series Probes— The P6017-series of probes preserves the transient response of Tektronix fast-rise, dc to 30-mega­ cycle oscilloscopes. The 42-inch cable length of P6017 Probes provides uniform amplitude response with no over­ shoot or ringing. Average bandpass characteristics show the P6017 Probes, with 42-inch cables, to be down between 0 and 1.2 db at 30 megacycles.
  • Page 46 Accessories — Type M P6016 A C Current Probe Systems— The P6016 AC Current P6013 High Voltage Probe — This new probe provides a Probe and Type 131 Amplifier constitute a current detect­ means of observing waveforms of high amplitude. Voltage ing system for use with any oscilloscope.
  • Page 47 C-19 particularly suitable for applications requiring extremely high writing rates. Other lenses currently available from Tektronix may be used with the C-19. Binocular viewing of a 5 cm high by 10 cm wide screen area permits the oscilloscope display to be observed while...
  • Page 48 Accessories — Type M Type 107 Square-Wave Generator Type 181 Time-Mark Generator Risetime— Less than 3 nanoseconds with 50-ohm cable ter­ Time-Marks— 1, 10, 100, 1000, and 10,000 microseconds, plus mination. 10-mc sine wave. Frequency Range— Uncalibrated: approximately 400 kc to 1-mc Crystal-Controlled Oscillator is accurate within 0.03%.
  • Page 49 003-001 Jaco No. 125 insulated screwdriver with 7 " shank tools for adjusting variable inductors in Tektronix and metal bit. This tool is useful for hard-to- instruments.
  • Page 50 Accessories— Type M NOTES ®...
  • Page 51 D I A G R A M S ^ . 1 £l Y754> f7 „ : 4y»' ' f ■ggi *-?* — S2 ?tß i--~ ~ ' - ---- ^<_~^£öfT — C i ^ sfero m * 270 « J f *»«* v j $ 3 # g ' I 5C0 v...
  • Page 52 HOW TO ORDER PARTS Replacement parts are available through your local Tek­ tronix Field Office. Improvements in Tektronix instruments are incorporated as soon as available. Therefore, when ordering a replacement part it is important to supply the part number including any suffix, instrument type, serial number, plus a modification number where applicable.
  • Page 53 150 /x/xf Cer. 500 v C6353 281-543 270 /x/xf Cer. 500 v C6354 283-026 25 v 101-649 .2 /xf Discap C6354 283-003 150 v 650-up .01 /xf Discap C6364 500 v 281-536 1000 /x/xf Cer. ® PARTS LIST — TYPE M...
  • Page 54 Prec. R5325 A,B,C,D 302-333 33 k y2 w R5326A,B,C,D Use *311-297 2 1 5 0 Var. VAR. GAI R5327 A,B,C,D 318-066 50 0 Prec. y. w R5331 A,B,C,D 302-391 390 0 y2 w PARTS LIST — TYPE M ®...
  • Page 55 10.1 k Ve w R6317 301-202 R6318 308-212 R6319 316-470 47 0 ’A w R6316 301-681 680 0 R6320 315-103 ’A w R6322 318-018 2.94 k Prec. Vs w R6323 318-009 10.1 k Prec. Ve w PARTS LIST — TYPE M...
  • Page 56 2N1143 Q5334 A,B,C,D 151-067 2N1143 Q5344 151-062 N I 01 Q5354 151-063 PADT35 Q6315 151-076 2N2048 Q6325 151-076 2N2048 Q6335 151-076 2N2048 Q6345 151-076 2N2048 Q6350 151-076 2N2048 Q6364 151-076 2N2048 7 - 4 PARTS LIST — TYPE M ®...
  • Page 57 Part Number Description S/N Range Unwired Wired SW5300 A,B,C,D *260-401 *262-434 MODE SW5310 A,B,C,D *260-402 *262-435 VOLTS/CM SW6367 260-212 Slide, DPDT Electron Tubes V5323 A,B,C,D 154-306 7586 V5364 154-040 12AU6 V5374 154-040 12AU6 V5383 154-039D 12AT7 PARTS LIST — TYPE M...
  • Page 58 NUT, HEX 3 /8-32 x '/2 210-413 NUT, HEX y4- 2 8 x 3 /8 x 3 /32 210-455 NUT, 6-32 x 5 /1 6 210-457 NUT, HEX y4- 3 2 x 3 /8 x 3 /32 210-465 ® I PARTS LIST — TYPE M...
  • Page 59 9 /llS O D x .390 ID 210-840 W ASHER, POLYETH. .190 I D x 7 / u OD 210-894 W ASHER, IN SULATIN G (FOR 136-080) 210-895 W ASHER, BRASS FLAT # 1 4 210-905 PARTS LIST — TYPE M...
  • Page 61 MANUAL CHANGE INFORMATION A t Tektro nix, we co ntin ually strive to keep up with latest electronic developm ents by adding circuit and component improvements to our instruments as soon as they are developed and tested. Sometimes, due to printing and shipping require­...
  • Page 63 TY P E M M5573 Tent SN 900 V5364 change to *157-038 12AU6 V5374 * Matched pair, furnished as a unit.
  • Page 65 TYPE M MOD 5877 CAPACITORS C6350 Change to 100/ijLtf 350v 281-523 C6351 Delete C6352 Change to lOOjUjLlf 350v 281-523 C6353 Delete C6354 Delete C6355 Change to 27 ß iif 500v 281-515 C6362 Delete C6364 Change to .001ßf 500v 281-536 RESISTORS R6350 2.4k...
  • Page 66 + 2 2 5 V C H A N N E L S W I T C H I N G C I R C U I T...
  • Page 67 f vne Addendum To Mod. 5877 C6350 Change to 470]LtjLtf 281-580 Type 6075 152-075 D6352 Change to 2.5k 308-127 R5390 Change to 200k Prec 309-051 R6360 l/2w IN T E R C O N N E C T IN G PLUG (C H .