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Tektronix TYPE Z PLIG-IN Instruction Manual
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Tektronix TYPE Z PLIG-IN Instruction Manual

Tektronix TYPE Z PLIG-IN Instruction Manual

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S
70
^7
V
1 1 \ 1 S "rR U O T IO IN I
M A N U A L
IN
Tektronix, Inc.
S .W . M illikan W a y
•
P. O . Box 500
•
Beaverton, O regon
•
Phone Ml 4-0161
•
C a b le s: Tektronix
070-251

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Summary of Contents for Tektronix TYPE Z PLIG-IN

  • Page 1 1 1 \ 1 S "rR U O T IO IN I M A N U A L Tektronix, Inc. S .W . M illikan W a y • P. O . Box 500 • Beaverton, O regon • Phone Ml 4-0161 • C a b le s: Tektronix 070-251...
  • Page 2 WARRANTY All Tektronix instruments are 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 ranty mentioned above should be taken up with your Tektronix Field Engineer.

  • Page 3: Table Of Contents

    CONTENTS Warranty Specifications Section 1 Operating Instructions Section 2 Circuit Description Section 3 Maintenance Section 4 Calibration Section 5 Parts List and Diagrams Section 6...
  • Page 4 TYPE Z PLUG-IN UNIT i J*E8 24 p f J COMPARISON VOLTAGE *v ( V c ) tOQV tJS% VOLTS/CM i*!*ü V A R . ATTEN A - V c ms« to ONLY ptSCOMNICt TEST DIFF ~ ' ^ S ß D,FF B AI, V c - *...
  • Page 5 0.05 volt per centimeter of deflection. Table 1-1 summar­ izes the risetimes and bandwidths available when the Z Maximum Allowable Combined DC and Peak AC Unit is used in combination with various types of Tektronix Input oscilloscopes. 600 volts, ac-coupled.

  • Page 6: Specifications

    Specifications — Type Z Comparison Voltage Accuracy Measurement Resolution Resolution accuracy, at 100-volts comparison voltage— Within 5 millivolts (0.5%) on the = + = 1 -volt range. 0.005%. Within 20 millivolts (0.2% ) on the ± 10-volt range. Maximum resolution— 5millivolfs per millimeter. Within 150 millivolts (0.15% ) on the ±100-volt range.
  • Page 7 © © O P E R A T I N G © © © © o o I N S T R U C T I O N S l : o © Front Panel ate any square-wave response (that is, to obtain a straight- line appearance of the trace).

  • Page 8: Operating Instructions

    Operating Instructions — Type Z V A R . A T T E N .— V a rie s the v e rti­ P o la rity — Selects co m p ar­ cal d e fle ctio n facto rs betw een ison vo lta g e p o la rity .
  • Page 9 Operating Instructions — Type Z Conventional Preamplifier Operation When the Z Unit is used for conventional preamplifier operation, the Mode switch should be placed in either the A O N LY or the — B O N LY position. Input signals should then be connected to the corresponding input connector.
  • Page 10 Operating Instructions — Type Z matching between A and B input circuits is necessary, one Differential operation between the two inputs is obtained input dc blocking capacitor may be “ padded" with a small when the Mode switch is in the A-B DIFF. position. Maximum additional capacitance, generally less than 0.001 /tfd.
  • Page 11 Operating Instructions — Type Z form could be seen but not easily measured. With a 5. Either input signal alone may be viewed without switch­ common-mode rejection of 40,000 to 1, the hum would be ing back to the A O N LY or — B O N LY positions of the reduced to 0.5 mm and the desired signal alone could be Mode switch by depressing the PUSH TO DISCONNECT accurately observed and measured.
  • Page 12 Operating Instructions — Type Z 1. DC Voltage Measurements. The voltage difference between the two points is read from the Helidial and the setting of the Range switch. When the Z Unit is used to make any dc voltage measure­ AC-DC Voltage Measurements Exceeding ±100 ments, it is first necessary to establish a reference line on Volts.
  • Page 13 Operating Instructions — Type Z Checking Attenuation Accuracy of VOLTS/CM divider resistor R1 is the 1-meg input resistor in the oscil­ loscope, R2 is the resistor in the probe. The procedure which Switches follows describes a method for checking a 10X attenuator probe.
  • Page 14 ■ l|——Ci) I > • l|— (? ) I - Fig. 3-1. Type Z Plug-In Unit block diagram.
  • Page 15 C I R C U I T D E S C R I P T I O N BLOCK DIAGRAM DESCRIPTION DETAILED CIRCUIT DESCRIPTION Fig. 3-1 shows the block diagram for the Type Z Unit. Comparison Voltage Regulator Signals applied to A Input and B Input connectors pass through the VOLTS/CM Attenuator switches to the grids Regulation of both the and —...

  • Page 16: Circuit Description

    Circuit Description — Type Z drop across V7689 and the zener diodes is slightly more circuit, the cathode swings about 1 /30 of the plate swing. than 100 volts, R7684 and R7685 (if needed) reduce the Therefore the grid-cathode swing of V7618A is approxi­ potential to the exact amount required.
  • Page 17 Circuit Description — Type Z sistor, Q8672. The bias of V7618A is the collector-to-base As in the Input Cathode Follower stage, the screen volt­ voltage of Q7618 plus the drop across Q8672. age for the Differential Amplifier stage is “ bootstrapped” 140 volts above the cathode.
  • Page 18 NOTES Type Z...

  • Page 19: Maintenance

    O INI 4 M A I N T E N A N C E PREVENTIVE MAINTENANCE disconnecting leads from the terminals. To remove some switches, such as the AC-DC, Polarity, and Range, the front overlay panel must be removed first to obtain access The Z Unit is a stable instrument, and will require com­...
  • Page 20 Maintenance — Type Z TH RU ST S P R IN G (S h o w n rotated FR A M E C O N T A C T S 1 8 0 ° ,ro m co rrec‘ Fig. 4-1. B VOLTS/CM turret attenuator removed from the Z Unit. 3.
  • Page 21 If continued maintenance work is to be performed on rear of this manual. The reference designation of each Tektronix instruments, it is advisable to have a stock of component is shown on the circuit diagram. solder containing about 3% silver.
  • Page 22 Maintenance — Type Z transistors in all cathode follower and amplifier stages, control to 0.00, and the POSITION control to midscale. preferably by substitution. After substituting a part, vari­ Set the oscilloscope triggering controls to produce a stable ous adjustments are affected. Use the Preliminary Pro­...
  • Page 23 Maintenance — Type Z stated previously. Where necessary, use matched and se­ Poor regulation of the comparison voltage may be caused lected parts obtained from the factory. by defects in any of the following: D8679, Q8672, Q8674, D7675, Q7672, Q7674, D7686, D7687, D7688, or V7689. 5.
  • Page 24 NOTES Type Z ®...

  • Page 25: Calibration

    Oscilloscope control settings for a 10. 52-ohm 5-to-l “ L" attenuator, Tektronix Part No. 011- Type 541A Oscilloscope are listed in the procedure; cor­ responding control settings should be used if a different 11. 52-ohm cable termination, Tektronix Part No. 011-001.
  • Page 26 Calibration — Type Z Preset the Z Unit front-panel controls as follows: P IN 7 , POSITION Midrange A VOLTS/CM B VOLTS/CM Both AC-DC switches Mode TEST VAR. ATTEN. Fully Clockwise COMPARISON VO LT­ AG E Polarity COMPARISON VO LT­ A G E Range 100 V Check to see that the COMPARISON VO LTAG E Helidial...
  • Page 27 Calibration — Type Z 3. Output Amplifier Balance JU N C T IO N OF R 7 6 5 3 A N D R 7 6 5 2 Connect the jumper between the bases of Q7644 and Q8644 (Fig. 5-3). With balanced transistors the trace will not shift more than 1 cm from the "vertical-system electrical center”...
  • Page 28 Calibration — Type Z connectors. Make certain the VAR. ATTEN. control is set An ac mismatch between two tubes or components can fully clockwise. Set the G A IN ADJUST control (R8639) to cause the straight line segments of the waveform to tilt obtain exactly 4 cm of vertical deflection.
  • Page 29 Calibration — Type Z cause of adjustment interaction, repeat steps 12 and 13 REGION OF before going on to step 14. OVERLAP 14. Turret Attenuator Compensation Place the A VOLTS/CM control to the .1 position. Set the oscilloscope Time/cm switch to .5 millisec. Decrease the square-wave generator frequency to 1 kc and adjust the generator output amplitude for approximately 3.5 cm de­...
  • Page 30 Keep the two voltag e readings within the range o f 107.3 to 108.1 volts, how ever. If another type of Tektronix oscilloscope is being used with the Z Unit to make a bandwidth check, consult the (c) Adjust CAL. 3: With the precision voltmeter set for Specifications section of this manual for the upper frequency + 107.7 volts, connect it between Test Point B and Ground.
  • Page 31 Calibration — Type Z COMPARISON VO LTAG E Helidial. At null, the Helidial Disconnect the voltmeter, remove the plug-in extension dial reading should not be further than '/2 minor division and insert the Z Unit directly into the oscilloscope plug-in (which is 5 millivolts) from the 10.000 position.
  • Page 32 NOTES...

  • Page 33: Parts List And Diagrams

    If a part you have ordered has been replaced with a new or improved part, your local Tektronix Field Office will contact you concerning any change in part number. ABBREVIATIONS AND SYMBOLS...
  • Page 34 Parts List — Type Z FRONT TYPE 2 PLUG-IN UNIT C A L IB R A T E D D IFFE R EN T IA L C O M P A R A T O R 1 2 0 0 0 C M . D Y N A M I C SCALE L E N G T H COMPARISON VOLTAGE -v •...
  • Page 35 Parts List — Type Z FRONT SERIAL/MODEL NO. REF. DESCRIPTION DISC. EFF. POST, binding, assembly 129-0035-00 Each Consisting Of: STEM, binding post adapter, 3 /8 x ,3/u inch, brass 355-0507-00 CAP, binding post brass 3 /8 OD x 1 '/32 x '/4-28 thread 200-0103-00 NUT, hex, steel, V4-28 x 3 /8 inch 210-0455-00...
  • Page 36 Parts List — Type Z RIGHT SIDE...
  • Page 37 Parts List — Type Z RIGHT SIDE SER IA L/M O D EL NO. REF. DESCRIPTION N O . EFF. DISC. NUT, hex, brass, 4-40 x 3 /1 6 210-0406-00 LOCKW ASHER, int. # 4 210-0004-00 LUG, solder, SE 4 210-0201-00 SCREW , 4-40 x % RHS 211-0017-00...
  • Page 38 Parts List — Type Z LEFT SIDE...
  • Page 39 Parts List — Type Z LEFT SIDE SERIAL/MODEL NO. REF. DESCRIPTION EFF. DISC. STRIP, ceramic, 7 / 1(Sx 7 notches 124-0094-00 SPACER, nylon, molded, ceramic strip 361-0007-00 STRIP, ceramic, 7 / u x l l notches 124-0106-00 SPACER, nylon, molded, ceramic strip 361-0009-00 SOCKET, 4 pin transistor 5469...
  • Page 40 Parts List — Type Z LEFT SIDE REF. SERIAL/MODEL NO, PART NO. DESCRIPTION d i s c 179-0429-00 CABLE, harness 179-0505-00 5169 CABLE, harness 179-0937-00 5170 CABLE, harness 210-0413-00 NUT, hex, brass, 3 /8-32 x y2 inch 210-0840-00 WASHER, steel, .390 ID x inch OD 406-0584-00 BRACKET, pot, i y 8 x 2 5 /8 x V 2 inch...
  • Page 41 Parts List — Type Z CHANNEL “ A ” TURRET ATTENUATOR s/n 4220 - up s/n 101 - 4219 SERIAL/MODEL NO. REF. PART NO. DESCRIPTION EFF. DISC. SW ITCH, wired— VOLTS/CM , CHANNEL " A ” 263-0004-00 switch includes: 204-0067-00 3563 BODY, wired turret 204-0128-00...
  • Page 42 Parts List — Type Z CHANNEL “ B” TURRET ATTENUATOR s / n 4220 - up s/n 101 - 4219 SERIAL/MODEL NO. REF. PART NO. DESCRIPTION EFF. DISC. 263-0005-00 SW ITCH, wired— VOLTS/CM , CHANNEL "B" switch includes: 214-0088-00 4219X SPRING, extension 214-0189-00 4219X...
  • Page 43 Parts List — Type Z REAR REF. S E R IA L / M O DEL N O , PA RT N O . D E S C R IP T IO N N O . EFF. D IS C . 200-0247-00 CAP, pot, poly, 1 inch diameter x .390 inch high 387-0226-00...
  • Page 44 NOTES...
  • Page 45 PARTS LIST Capacitors Values fixed unless marked variable. Tolerances ± 2 0 % unless otherwise indicated. Tektronix Part Number C 7600t .1 /xf 600 v *295-054 C7601 XI 950-up 1.5 pf Cer. 500 v ± .5 pf 281-526 C7602 .2 /xf Cer.
  • Page 46 Resistors (continued! Tektronix Part Number R7619 101-6469 Var. VAR. ATTEN. BAL. 311-003 R7619 6470-up 200 Q Var. 311-0178-00 VAR. ATTEN BAL. R7620 500 k .2 w Var. DIFF. BAL. 311-068 R7621 470 k y 2 w Fixed Comp. 301-474 R7622...
  • Page 47 (continued) Tektronix R esisto rs Part Number R7688 990 k Fixed Prec. 310-098 R7689 500 k Var. Cal. Adj. # 5 311-210 R8604 101-260X 302-470 R8608 1 meg Fixed Prec. 309-148 R8610 47 0 316-470 'A w R8614 101-6469 330 0...
  • Page 48 V7634 and V8634. Furnished as a unit. N OTE: Four ferrite beads (ferramic suppressors) are found in the Type Z Unit, two ahead of each turret attenuator. If re­ placement of these becomes necessary, order by the Tektronix Part Number 276-507. ® 2...
  • Page 49 PARTS LIST “Z” Turret Attenuators Values are fixed unless marked Variable. Capacitors Tolerance ± 2 0 % unless otherwise indicated. Ckt. No. S/N Range Description Tektronix Part Number C407 Adjusting Slug 214-084 C408A Selected Nominal Value 281-529 1.5 pf C408B...
  • Page 50 Resistors (continued) Tektronix Part Number Prec. 309-142 900 k R410C Prec. 111 k 318-006 R410E y. w Prec. 950 k 309-143 R411C Prec. 318-007 52.6 k R411E Vs w Prec. 309-277 980 k R412C Prec. 318-033 R412E 20.4 k Prec.
  • Page 51 MANUAL CHANGE INFORMATION At 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 53 TYPE Z TEXT CORRECTIONS Section 1 Specifications Page 1-2, column Transient Response and Permissible Signal Voltage Rate of Change: CHANGE: Rate of rise to be "l volt per 7 nsec, maximum." Section Operating Instructions Page 2-4, Fig. 2-Ub CHANGE: "decoupled" to read "ac-coupled" Page 2-5, column 2, Table 2-2 CHANGE: "Attenuator Performance"...
  • Page 54 TYPE Z TENT SN 6910 PARTS LIST CORRECTION CHANGE TO: 0190-00 7618 2N39C& 0190-00 7672 2N390^ 0188-00 3906 Q767^ 8618 0190-00 2N390^ 8638 0190-00 2N39CA 0190-00 8672 2N3904 0190-00 2N3904 Q867^ Mil,527/168...
  • Page 55 TYPE Z 6970 TENT SN ELECTRICAL PARTS LIST CORRECTION CHANGE TO: 1 5 1 -0103-00 2N2219 Q86l8 -0103-00 1 5 1 2N2219 M13,775/568...