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Tektronix 1A1 Instruction Manual

Dual-trace plug-in unit
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I V I A . I X I UAL
Tektronix, Inc.
S.W. M illikan W ay •
070-088 5-00
P. O. Box 500 •
Beaverton, Oregon 97005 •
Serial Number
1A1
TYPE
Dual-Trace
Plug-in Unit
SN 2 0 ,0 0 0 -U p
Phone 644-0161
•
Cables: Tektronix
468

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Summary of Contents for Tektronix 1A1

  • Page 1 I V I A . I X I UAL Serial Number TYPE Dual-Trace Plug-in Unit SN 2 0 ,0 0 0 -U p Tektronix, Inc. S.W. M illikan W ay • P. O. Box 500 • Beaverton, Oregon 97005 • Phone 644-0161 •...
  • Page 2 Specifications and price change privi­ leges reserved. Copyright C l 1964, new material copyright 1966, 1968 by Tektronix, Inc., Beaverton, O re­ gon. Printed in the United States of America. All rights reserved. Contents of this publication may not be reproduced in any form without permis­...
  • Page 3 CONTENTS Section 1 Characteristics Section 2 Operating Instructions Section 3 Applications Section 4 Circuit Description Section 5 Maintenance Section 6 Performance Check Section 7 Calibration Abbreviations and Symbols Parts Ordering Information Section 8 Electrical Parts List Mechanical Parts List Information Section 9 Mechanical Parts List Section 10...
  • Page 4 I I K T I O N I X . IN C . f O lH A N O . O U O O N . U. >- A ______________________ CALIBRATED POSITION VARIABLE POSITION VARIABLE PREAMP VOLTS/CM VOLTS/CM CHANNEL 2 CHANNEL 1 CM 1 moot* out Fig. 1-1. Type 1A1 Dual-Trace Plug-In Unit. Type 1A1 http://manoman.sqhiH.com...
  • Page 5 580-Series oscilloscopes in conjunction with the Type ing and information. 81 or 81A Plug-In Adapter. The Type 1A1 can also be used with other oscilloscopes and devices through the use of the In dual-trace operation there are two operating modes, Types 127, 132, or 133 Plug-In Power Supplies.
  • Page 6 Characteristics— Type 1 AT CALIBRATED PREAMPLIFIER (Cont) Supplemental Information Performance Requirement Characteristic Using a Type 81 Plug-In Adapter. 16 ns 11 ns 581, 581 A, 585, or 585A 25 ns 16 ns 11 ns 541, 541 A, 543, 543A, 543B, 25 ns 545, 545A, 545B, or 555 13 ns...
  • Page 7 Characteristics— Type 1A1 Fig. 1-2. Typical frequency response curve of the Type 1A1 when used in conlunction with the Type 544, 546, 547 or 556 Oscilloscope. A 25-ohm resistor source (generator 50-ohm output applied through a 50-ohm cable terminated in 50 ohms) was used to drive the Type 1A1.

  • Page 8: Operating Instructions

    22A, + 8 7 V from pin 19 in the Time-Base units tion range to about 50V/cm. The con­ is applied to pin 5 o f the Type 1A1 interconnect­ trol activates a switch when moved out ing plug (see Fig. 2 -1 ). This voltage w ill damage of the CALIB (calibrated) position to pro­...
  • Page 9 CRT cathode Selector switch (located on the seem to start simultaneously and continue across the CRT. rear panel of most Tektronix oscilloscopes) to the Dual-Trace Chopped Blanking position (see Fig. 2-2C). 9. Set the oscilloscope Time/Cm switch to 5 /is and adjust the oscilloscope trigger controls to obtain a stable display.
  • Page 10 The gain adjustments should be checked periodically to assure correct vertical deflection factors, particularly when the Type 1A1 is used for the first time or is moved from one Fig. 2-2. Chopped-mode waveforms: (A ) trace broken up into seg­...
  • Page 11 Operating Instructions— Type 1A1 1. Set the Type 1A1 front-panel controls to the same posi­ 3. Apply a 0.2-volt peak-to-peak signal from the oscillo­ tions as in the Gain Adjustments procedure, except the IN­ scope calibrator through a coaxial cable to the Channel 1 PUT SELECTOR switch must be set to GND and the VOLTS/ INPUT connector.
  • Page 12 However, in applying high-amplitude calibrator is used fo r compensating the probe, do signal voltages to either the probe or Type 1A1, do not ex­ not use a repetition rate higher than 5 kHz. At ceed their maximum voltage ratings. When making ampli­...
  • Page 13 0.7 pF. Band­ X0.01 s e n s itiv ity . May age rating o f probe. 50 0 at Type 1A1 input). w idth th a t o f Type 1A1/ need blocking capacitor P6035-100X. P6035: 5 k fi, 0.6 pF.
  • Page 14 Type 1A1 VOLTS/ lector switch is set to the CM switch set to .01.4 proper position. 4Type 134 C u rre n t/D iv switch is calib ra te d when the Type 1A1 VOLTS/CM switch is set to .05.
  • Page 15 Placing the INPUT SELECTOR switch to the GND position form on the CRT. If a positive voltage is DC coupled to the grounds the input circuit of the Type 1A1 to provide a DC Type 1A1, the beam will move up.
  • Page 16 CHOP. In general, use the CHOP position (chopped-mode opera­ If asynchronous signals are applied to the Type 1A1 tion) with sweep rates up to about 10/x.s/cm for display­ while you are using chopped mode of operation and Chan­...
  • Page 17 AC Fast or AC LF Reject. 3 Plug-lrt position is the Channel 1 only internal signal available at pin 5 of the Type 1A1 interconnecting plug to the oscilloscope. If your oscilloscope is not wired to permit use of this trigger source, use the Ext position and CH 1 TRIGGER OUT signal.
  • Page 18 In high-frequency applications where the bandwidth limit of 2. Output impedance of the Channel 1 preamplifier is the Type 1A1 Channel 1 trigger amplifier is a limiting fac­ nominally 50 ohms. tor, the reference trigger for the oscilloscope can be derived from external sources.
  • Page 19 In addition to the previously given operating information a Channel 1 front-panel output at a point ahead of the concerning the Type 1A1 CH 1 TRIGGER OUT connector location of these controls. and the Internal “ Plug-In" triggering source, the following information is provided for consideration: By using Channel 1 as a 1 OX low-level voltage pre­...
  • Page 20 5 in the Calibration Section) can be ordered without NAL OUT connector. A gain of approximately 100 is re­ components by using the following description: Coupler, test alized when Channel 1 VOLTS/CM switch is set to .005. set with BNC connectors, Tektronix Part No. 011-0081-00. 2-13 ©...
  • Page 21 This section of the manual describes procedures and tech­ than about six times the setting. niques for making basic measurements with the Type 1A1 2. Apply the signal to the Channel 1 INPUT connector, and the associated Tektronix oscilloscope. When only one preferably through a coaxial cable or an attenuator probe.
  • Page 22 (A) and (B) in Fig. 3-2. If the PULL FOR INVERT switch is set to normal and the point on the waveform is above the The Type 1A1 is now ready to use in making signal meas­ reference line, the polarity is indicated to be positive (+).
  • Page 23 Channel 1 VOLTS/CM switch, multiply the VOLTS/CM for high-frequency signals. switch setting by the Deflection Conversion Factor obtained 4. Connect a coaxial cable between the Type 1A1 CH 1 in step 2: TRIGGER OUT connector and the oscilloscope Trigger Input...
  • Page 24 1.2 //s Phase Measurements Phase comparison of two signals of the same frequency can be made using the dual-trace feature of the Type 1A1. To make the comparison, proceed as follows: 1. Follow the procedure outlined in the first seven steps under Time-Difference Measurements.
  • Page 25 Applications— Type 1A1 scope Variable Time/Cm control. However, you must point you desire. Each cm on the graticule now represents consider this increase in your calculations. 40° of 1 cycle (see Fig. 3-4). 6. Measure the horizontal distance, in cm, between cor­...
  • Page 26 Thus, an attenuator probe, when connected signal is coupled straight through the first section of the to the input connector of the Type 1A1, will work into the switch without attenuation to the Input Source Follower same time constant to eliminate the need for readjusting Q122.
  • Page 27 Circuit Description— Type 1A1 SW105 ^ ----------------------------------- V O L T S / C M ---------------------------------------- (Set to .1) Fig. 4 -1 . Simplified circuit diagram showing the most important components involved when calculating the X 2 attenuation factor. source element instead of ground. (Capacitance exists be­...
  • Page 28 Circuit Description— Type 1A1 Follower stage (Q123/Q143) provides a low-impedance invert position, the display will be inverted because the drive to the Input Amplifier stage (Q124/Q144). The signal at switch reverses the signal leads to the bases of the fol­...
  • Page 29 Circuit Description— Type 1A1 Fig. 4 -2 . Simplified circuit diagram showing the main DC current paths when Channel 1 is on and Channel 2 is off.
  • Page 30 Resistors R464 and R474 aid in matching the output During dual-trace operation when the MODE switch is impedance of the Type 1A1 to the input impedance of the set to either ALT or CHOP position, the diode switches con­ oscilloscope vertical amplifier.
  • Page 31 Channels 1 and 2 in the At the end of each sweep a positive-going trigger is Type 1A1. When Q305 conducts, Channel 1 signal or trace generated by the time-base circuit in the oscilloscope. This is displayed.
  • Page 32 Type the ADD position, the collectors of Q305 and Q315 must be 1A1. From pin 7 of the interconnecting plug the pulse is raised to about the same level as the collector level of the applied through pin X of the Output Amplifier card to the single conducting transistor in the other modes of operation.
  • Page 33 Timing of the switching and blanking multivibrators in the C302 and C311 to the Blanking Multivibrator. Conduction Switching Circuit of the Type 1A1 allows for the delay in the of diodes D301 and D311 effectively shorts out the coupling vertical amplifier of the oscilloscope. That is, the blanking...
  • Page 34 In alternate mode of operation as well as all other modes The nuvistors in the Type 1A1 draw about 135 mA which except chopped, the Blanking Multivibrator remains in its leaves about 15 mA to be shunted through R494. In the quiescent state since no blanking pulses are needed or ap­...
  • Page 35 To ensure accurate measurements, the calibration of the bushings. Store the unit in a dust-tight covering Type 1A1 should be checked after each 500 hours of oper­ when not in use. ation or every six months if the unit is used intermittently. The...
  • Page 36 Tektronix, Inc. Before purchasing or ordering replace­ ponents, some special parts are used in the Type 1A1. These ment parts, consult the Electrical Parts List for value, toler­...
  • Page 37 Tektronix, include the following information: 1. Apply only enough heat to make the solder flow freely. 1. Type 1A1 plug-in unit and serial number of the unit. 2. Apply only enough solder to form a solid connection. Excess solder may impair the function of the part.
  • Page 38 Type 1A1. The remainder of the wiring in the Type 1A1 is color coded with two or less Single wafers or mechanical parts on rotary switches are stripes, or has a solid background with no stripes. The color not normally replaced.
  • Page 39 If the deflection factor Transistor tester. Tektronix Type 575 Transistor-Curve of this wide-band test oscilloscope is as low as 5 mV/cm, Tracer to test transistors and diodes used in the Type 1A1. use it in place of item 4.
  • Page 40 ± 0 .3 volt between these two points nal at output of each amplifier stage in the Type 1A1. (Sig­ may position the trace more than ± 3 cm from the oscillo­...
  • Page 41 TABLE 5-2 Approxim ate Resistance Between the 16-pin Interconnecting Plug Pins and Ground Type of Meter: Manufactured By: Type o f Meter: VOM Model No.: Type 1A1 Serial No.: Resistance Readings Resistance Readings MODE Switch Ohms Range Ohms Range Setting + GND —...
  • Page 42 If you are in doubt whether a diode is defective, unsolder plug-in compartment. The plug-in extension permits access one end and check the forward-to-back resistance ratio. to the circuits in the Type 1A1 for detailed signal tracing If the ohmmeter check proves unsatisfactory, replace the and troubleshooting.
  • Page 43 Reverse Reverse Reverse Reverse CAUTION Forward D301 Forward Reverse Forward Forward If the Type 1A1 is used with a Type 544, 546, D311 Forward Forward Reverse Forward Forward or 547 Oscilloscope, be sure to pull the oscillo­ D345 Forward Forward...
  • Page 44 To check transistors using a voltmeter, measure the emitfer- to-base and emitter-to-collector voltages. Determine if the 9. Locate the same test point in the Type 1A1 that cor­ voltages are consistent with the normal resistances and cur­ responds to the one on the diagram and connect the probe rents in the circuit.
  • Page 45 AC signals. ponents used in the Type 1A1 result in close spac­ ing. An inadvertent movement o f the test prods, 7. Repair and Recheck the Circuit.
  • Page 46 Maintenance— Type 1A1 > ■ 4 > IA ° 1 < V ) 3 £ £ tLLL O ► 1 0 E l 0 0 0 E 0 0 S 0 0 0 0 E < > »- c s jq ^ I I ^ II ^ I] ^ II - II ^ II - II °...
  • Page 47 Maintenance— Type 1A1 670 0075 01 Fig. 5-5. Channel 1 Input Amplifier card. 5-13 http://manoman.sqhill.com...
  • Page 48 Maintenance— Type 1A1 R721 R418 >253A -K )2 5 3 B ■ 4 7 3 Q?s in Q 2 5 3 A ■ 4 4 8 ■453 R249 ■ 4 9 / k £ u } ' n * L...
  • Page 49 Maintenance— Type 1A1 0 4 0 4 0 4 4 4 o. « * ^ D 4 5 4 i » J M f0 4 ? j> r « D4?~3^ I I ^04M ► S ^ ■ # * ^ 3 . 5...
  • Page 50 Maintenance— Type 1 AT Fig. 5 -8 . Front of Output Amplifier card. 5-16 http://manoman.sqhill.com...
  • Page 51 Maintenance— Type 1A1 ■C U B C 1 2 I o d d.d SN 2 6 9 5 0 , originally located physically ocrois 0 1 1 8 and 0 1 2 1 . Fig. 5 -9 . Channel 1 Input FET board. Front and back view showing parrs location and load connection!.
  • Page 52 Maintenance— Type 1A1 Fig. 5-10. Channel 2 Input FET board. Front and back view showing parts location and lead connections. 5-18 http://manoman.sqhill.com...
  • Page 53 Tektronix Type 191 Constant Amplitude Signal Generator recommended. This performance check is provided to check the opera­ tion of the Type 1A1 without removing the side or bottom covers from the oscilloscope. This procedure may be used Accessories for incoming inspection, instrument familiarization, reliability testing, calibration verification, etc.
  • Page 54 NOTE Preliminary Procedure From this point on in the Performance Check pro­ Insert the Type 1A1 into the test oscilloscope. Connect cedure, use the Intensity, Focus, and Astigmatism the power cord of the oscilloscope to the proper operating controls as needed to obtain sharply focused trace voltage and turn on the power switch.
  • Page 55 CHECK—The sequence of alternation one step at a time for all settings of the Time Base B Time/Cm switch. c. Using the Type 1A1 POSITION controls, position Chan­ (The Intensity control for the test oscilloscope will have to segmented trace about cm above graticule center.
  • Page 56 Connect the .2-Volt signal from the Standard Ampli­ c. CHECK—The attenuator accuracy by means of Table tude Calibrator output connector through a 42-inch 50-ohm cable to the Type 1A1 Channel 1 Input connector. TABLE 6-1 d. Use the Channel 1 POSITION control to center the Attenuator Accuracy Check display.
  • Page 57 Switch the Channel 2 INPUT SELECTOR switch from DC to AC and note the shift of the display. b. Set the Type 1A1 MODE switch to CH 2. f. CHECK—The waveform should shift downward about c. Set Channel 2 INPUT SELECTOR switch to AC.
  • Page 58 Performance Check— Type 1A1 14. Check Input Capacitance Normalization and Attenuator Compensation a. Requirement—Optimum response to a square wave. Corre ct (G ptimu m fla t top Rolloff or overshoot on the front corner should be no more than 3%.
  • Page 59 Insert a 10X attenuator between the Type 106 - -O ut­ d. Set the Type 106 -(-Transition Amplitude control to put connector and the 5-ns cable. Set the Type 1A1 Channel obtain a 4-cm amplitude display. Set the Symmetry control 1 VOLTS/CM switch to .005.
  • Page 60 Remove the 50-ohm coaxial cable Output connector through a 5-ns cable and a 50-ohm in-line from the CH 1 TRIGGER OUT and Channel 2 INPUT con­ termination to the Type 1A1 Channel 1 INPUT connector. nectors.
  • Page 61 Performance Check— Type 1A1 TABLE 6-3 Type 1A1 Bandwidth' and Risetime" (lo a d Impedance: 50 ohms) V VOLTS/CM Switch Positions System .005 (Instrument Types) Bandwidth Risetime Bandwidth Risetime 544. 546, 547, 556 Dc to 12.5 ns DC to 7 ns...
  • Page 62 Performance Check— Type 1A1 e. Disconnect the end of the 18-inch cable that connects j. Set the MODE switch to CH 2. to Channel 2 INPUT connector. k. CHECK— Using steps 18d through 18g as a guide, f. Disconnect the signal from the Channel 1 INPUT con­...
  • Page 63 Remove the patch cord. This completes the perform­ f. Adjust the Channel 1 VARIABLE VOLTS/CM control ance checkout procedure for the Type 1A1 Dual-Trace Plug- for a display amplitude of 4 cm. In Unit. If the instrument has met all performance require­...
  • Page 64 Fast-rise output: variable from 50 mV given in this section. This procedure calibrates the unit to 500 mV into a 50-ohm load. Tektronix Type 106 Square- to the performance requirements listed in the Character- Wave Generator recommended.
  • Page 65 Calibration— Type 1A1 Fig. 7-1. Tett equipment, occeitoriec and lo oli recommended for complete calibration of the Type 1A1. http://manoman.sqhill.com...
  • Page 66 This short-form calibration procedure is provided to aid TOR switch is changed from GND to AC. in checking the operation of the Type 1A1. It may be used as a calibration guide by the experienced calibrator, or it may I~1 12. Check Gate Current for Channel 1 (page 7-12) be used as a record of calibration.
  • Page 67 Capacitor The following procedure is arranged in a sequence which C204 None Cl 04 None allows the Type 1A1 to be calibrated with the least inter­ C205B C205C C105B C105C action of adjustments if the complete procedure is followed. C206B...
  • Page 68 2. Lay the oscilloscope on its right side for access to the bottom side of the Type 1A1. All waveforms shov/n in this procedure are actual 3. Install the Type 1A1 in the oscilloscope vertical plug­ waveform photographs taken with a Tektronix in compartment.
  • Page 69 Calibration— Type 1A1 Fig. 7 -2 . e q u ip m e n t s e tu p fo r steps 1 th ro u g h 4. PULL FOR INVERT Control Settings (both channels) Normal or in VARIABLE VOLTS/CM...
  • Page 70 Calibration— Type 1A1 TYPE 1A1 DUAL- PLUG-IN UNIT OREGON, U S A V I I t V I t O N I X I N C P O S IT IO N VARIABLE P O S IT IO N V O IT S /C M...
  • Page 71 Calibration— Type 1A1 b. Set the Channel 2 VOLTS/CM switch to .05. e. Using the Channel 2 POSITION control, position the trace to coincide with graticule center. Leave the control c. CHECK— That the trace coincides with graticule cen­ at this setting until completing the next step.
  • Page 72 Calibration— Type 1A1 tig . 7-7. T»it iq u ip m tn l itlu p lor i l r p i S through 10. INPUT SELECTOR Control Settings (both channels) Type 547 Oscilloscope Standard Amplitude Calibrator Horizontal Display Sweep Magnifier Amplitude .2 Volt...
  • Page 73 Calibration— Typo TYPE 1A1 DUAL- V t K I R O N I X I N C 7-1. Typical displa y th a w in g correct g a in a d ju itm a n l. 6. Check Channel 2 VARIABLE VOLTS/CM Control 7 - 1 0 .
  • Page 74 Calibration— Type 1A1 C h a n n e l ' ■ 00 5 V CM G A IN R13SA 0 0 5 V /C M — G A IN K 2 7 8 A Channel 3 M l .
  • Page 75 Calibration— Type 1A1 Fig. 7 -1 3 Equipment letup For ite p i I I through 16. Control Settings VOLTS/CM (both channelsl .005 TYPE 547 Oscilloscope INPUT SELECTOR (both channels) Horizontal Display Sweep Magnifier XI Off Single Sweep Switch Normal 11.
  • Page 76 Calibration— Type 1A1 CHECK—Sot the Channel 1 INPUT SELECTOR switch to b. Set the Channel 2 INPUT SELECTOR switch to GND AC and nolo the amount of trace shift; should not exceed ond the MODE switch to CH 2, Check that the Channel 2 2 mm, VOLTS/CM switch is set to .005.
  • Page 77 •— i. CHECK— That the switching portion of the trace from one channel to the next blanks out (becomes dim) at normal intensity. This indicates that the Type 1A1 blanking pulses ----- -- > — - are blanking the beam during the switching-time interval between channels (see Fig.
  • Page 78 Calibration— Type 1A1 7 - 1 7 , E q u ip m e n t fo r l e t u p H e p Typo 547 Oscilloscope Amplitude Calibrator .1 Volt Horizontal Display Type 1A 1 Sweep Magnifier...
  • Page 79 Set the MODE switch to ADD. h. CHECK—That with the same amount of calibrator sig­ nal applied to both channels of the Type 1A1 as in step 17f, a single calibrator waveform display four cm in ampli­ tude is obtained (see Fig. 7-18B).
  • Page 80 Calibration— Type 1A1 F i g . 7-19, Equipment ulup t o r tlop IS . PULL FOR INVERT Control Settings (Channel 2) Normal or in Type 547 Oscilloscope VARIABLE VOLTS/CM (both channels) CALIB Horizontal Display VOLTS/CM (Chan­ .005 Sweep Magnifier...
  • Page 81 Calibration— Type 1A1 18. Check Channel 1 Signal Out Amplifier c. Connect a 42-inch 50-ohm cable from the oscilloscope Calibrator Output connector to the Channel 1 INPUT con­ Gain nector. a. Test equipment setup, with connections made at com­ d. Adjust the oscilloscope Triggering Level control to obtain a stable display.
  • Page 82 Calibration— Type 1A1 19. Check Channel 1 Trigger Out Amplifier Gain a. Test equipment setup, with connections made at com­ pletion of step 19b, is shown in Fig. 7-21. b. Disconnect the 18-inch cable from the CH 1 SIGNAL OUT connector and connect it to the CH 1 TRIGGER OUT connector.
  • Page 83 Calibration— Type 1A1 4? Inch, SO ohm Cable Fig. 7-33, Toct equipment itlu p for itop 30. Control Settings VOLTS/CM (Chan­ nel 21 .005 INPUT SELECTOR Type 547 Oscilloscope (both channels) Horizontal Display Standard Amplitude Calibrator Swoop Magnifier X I Off...
  • Page 84 Calibration— Type 1A1 TABLE 7-1 f. CHECK— For proper vertical deflection at each Channel 1 VOLTS/CM switch position by using Table 7-1 as a con- Standard convenient guide. Accuracy is ± 3 % for the .01, .02 and .1 Am plitude...
  • Page 85 10X attenuator, 5-ns Normal or in (both channels) 50-ohm cable, 50-ohm in-line termination and a 15-pF input capacitance normalizer to the Channel 1 INPUT connector VARIABLE VOLTS/CM on the Type 1A1 (see Fig. 7-24). (both channels) CALIB 7-22 © I http://manoman.sqhill.com...
  • Page 86 4 cm display amplitude except for the 20 VOLTS/ e. Set the oscilloscope Triggering Level control to ob­ CM position. tain a stable display and use the Type 1A1 Channel 1 PO­ SITION control to center the display. h. ADJUST— Using Table 7-2 as a guide adjust Channel input capacitance and frequency compensation capacitors f.
  • Page 87 Calibration— T y p e 1A 1 C HA N N E L 1 Fig. 7 - 2 7 . lo c a tio n C h o n n o l In p u t ih u n t c o p a c ilo n c o a n d Fig.
  • Page 88 Apply the 100-kHz fast-rise signal from the -f Output POSITION connector on the Type 106 through a 5-ns cable and 50- (both channels) Near midrange ohm in-line termination to the Type 1A1 Channel 1 INPUT PULL FOR INVERT connector (see Fig. 7-29). (both channels) Normal or in VARIABLE VOLTS/CM d.
  • Page 89 Use the oscilloscope Horizontal Position and Type to a square wave. The resulting waveform may have a 1A1 Channel 1 POSITION controls to move the waveform slightly overpeaked front corner and a slight dip that follows near the location shown in Fig. 7-30A.
  • Page 90 ( A ) B o tto m a n d IB ) ro a r v lo w t o f fh o T y p o 1A1 s h o w in g lo c a tio n !
  • Page 91 Check that the waveform is 4 cm in amplitude and top leading corner is not optimum. positioned to the same location as described for the pre­ vious channel. n. Disconnect the Type 106 signal from the Type 1A1. 7-28 ®2...
  • Page 92 Apply the 50-kHz reference signal from the Type 191 POSITION Output connector through a 5-ns cable and a 50-ohm in line (both channel) Midrange termination to the Type 1A1 Channel 1 INPUT connector PULL FOR INVERT |sec Fig. 7-34|. [both channels) Normal or in d.
  • Page 93 Calibration— Type 1A1 k. CHECK— Using steps 24d through 24g os a guide, check Channel 2 upper bandwidth for a limit of 50 MHz or higher. . Set the Type 191 Frequency dial to 25 MHz, the Fre­ quency Range switch to 50 kHz Only, and the Amplitude Range switch to 5-50 mV.
  • Page 94 Calibration— Type 1A1 e. Adjust the Type 191 Amplitude controls so the display k. Reconnect the 18-inch cable to the Channel 2 INPUT is exactly 4 cm in amplitude (see Fig. 7-35A). connector. Check that the signal is applied from the CH 1 SIGNAL OUT connector to Channel 2.
  • Page 95 |.t i» _ Multiplier near center graticule Midrange Symmetry vertical line Amplitude Not applicable Amplitude Calibrator Hi Amplitude Fast Rise Fast Rise Type 1A1 switch Near midrange -(-Transition Amplitude CH 2 MODE —Transition Amplitude Not applicable POSITION Near midrange Power...
  • Page 96 1A1. Turn off the Type 106 Square-Wave Generator and in Fig. 7-37. disconnect it from the Type 1A1. Reinstall the left side and g. CHECK—Measure the risetime of the waveform from bottom covers on the oscilloscope.
  • Page 97 PARTS LIST ABBREVIATIONS binding head brass internal binding head steel length or long cap. capacitor met. metal mtg hdw ceramic mounting hardware comp composition outside diameter conn connector oval head brass cathode-ray tube oval head steel countersunk pan head brass double end pan head steel piste...
  • Page 98 If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.
  • Page 99 Type 1A1 SECTION 8 ELECTRICAL PARTS LIST Values are fixed unless marked Variable. Tektronix Serial/Model No. Ckt. No.____________Part No. Eff_____________ Disc________________________Description Capacitors Tolerance ± 2 0 % unless otherwise indicated. *285-0751-00 Cl 02 600 V 281-0613-00 10 pF Cl 03...
  • Page 100 Electrical Parts List— Type 1A1 Capactiors (c o n tj Tektronix Serial/Model No. Description Part No. Disc Ckt. No. Tub. 0.2-1.5 pF, Var C204 281-0064-00 0.68 pF Selected (nominal value) C205A 281-0537-00 0.2-1.5 pF, Var Tub. C205B 281-0064-00 1.8-13 pF, Var Tub.
  • Page 101 Electrical Parts List— Type 1A1 Connectors Tektronix Serial/Model No. Ckt. No. Part No. Eff_____________ Disc________________________Description J101 *131-0342-01 BNC, female, 1 contact J201 *131-0342-01 BNC, female, 1 contact Inductors LI 38 276-0507-00 Core, Ferramic Suppressor L238 276-0507-00 Core, Ferramic Suppressor LR105A *108-0270-00 0.25...
  • Page 102 Electrical Parts List— Type 1A1 Resistors Tektronix Serial/Model No. Ckt. No. Part No. Disc Description Resistors are fixed. composition, ± unless otherwise indicated. S6CI y . w R103 317-0560-00 R104 317-0560-00 y . w ’A W Prec R105C 322-0610-01 500 k ’A %...
  • Page 103 Electrical Parts List— Type 1A1 Resistors (cont) Tektronix Serial/Model No. Part No. Description Ckt. No. Disc Prec R210C 322-0624-01 321-1289-01 io.i to y8 w Prec R210E 317-0151-00 y . w R210G 1 5 0 a ’A W 995 kO Prec...
  • Page 104 Electrical Parts List— Type 1A1 Switches (c o n t j Tektronix Serial/Model No. Ckt. No.____________Part No. _____________ Disc________________________Description E f f SW129 260-0560-00 Rotary CHANNEL 1 VOLTS/CM (Rear) SW201 ] CHANNEL 2 INPUT SELECTOR Wired *262-0693-02 22709 p e* er...
  • Page 105 Electrical Parts List— Type 1A1 CHANNEL 1 INPUT AMPLIFIER CARD Series D (confj Tektronix Serial/Model No. Ckt. No. Part No. Disc ___________________ Description Transistors fco n t j Q153B Silicon 2N3563 151-0225-00 151-0131-00 Germanium 2N964 Q163 2N964 151-0131-00 Germanium Q164...
  • Page 106 Electrical Parts List— Type TA1 CHANNEL 1 INPUT AMPLIFIER CARD Series D (co n t) Tektronix Serial/Model No. Ckt. No. Part No. Disc Description Resistors (c o n t j R165 315-0471-00 4 7 0 a R166 301-0392-00 3.9 kn 321-0058-00 39.2...
  • Page 107 Electrical Parts List— Type 1A1 CHANNEL 2 INPUT AMPLIFIER CARD Series E (contj Tektronix Serial/Model No. Ckt. No.____________ Part No. Eff_____________ Disc________________________Description Resistors Resistors are fixed, composition, ± 1 0 % unless otherwise indicated. R118 316-0154-00 150 k n ’A W ’/...
  • Page 108 Electrical Parts List— Type 1A1 OUTPUT AMPLIFIER CARD Series F (contj Tektronix S erial/M odel No. Ckt. No. Part No. Disc Description Capacitors (cont) C302 283-0000-00 500V 0.001 C303 283-0010-00 0.05 fx F C304 283-0010-00 0.05 ix? C306 281-0518-00 47 pF...
  • Page 109 Electrical Parts List— Type 1A1 Semiconductor Device, Diodes (c o n t) Tektronix S eriai/M odel No. Part N o. Disc Ckt. N o. Description Silicon D422 *152-0153-00 Replaceable by 1N4244 D423 *152-0153-00 Silicon Replaceable by 1N4244 *152-0153-00 Silicon D424...
  • Page 110 Electrical Parts List— Type 1A1 OUTPUT AMPLIFIER CARD Series F (confj Tektronix Serial/Model No. Part No. Ckt. No. Disc Description Resistors (confj R330 315-0472-00 4.7 kO ’A w R331 315-0470-00 47 n ’A W 315-0102-00 l k a R332 ’A W...
  • Page 111 Electrical Parts List— Type 1A1 OUTPUT AMPLIFIER CARD Series F fcont) Tektronix S erial/M odel No. Ckt. No. Part No. Disc Description Transformer T330 *120-0161-00 Toroid 12 turns, quintifilar Electron Tubes V464 *157-0121-00 7586, checked V474 *157-0121-00 7586, checked 8-13...
  • Page 112 Mounting hardware must be purchased separately, unless otherwise specificed. PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix, Inc. Field Office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering department.
  • Page 113 Mechanical Parts List— Type 1A1 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS (Located behind diagrams) FIG. 1 FRONT REAR FIG. 2 FIG. 3 CIRCUIT CARDS & STANDARD ACCESSORIES...
  • Page 114 Type 1A1 SECTION 9 MECHANICAL PARTS LIST FIG. 1 FRONT Fig. & Index Tektronix S erial/M odel No. Description Part No. Disc 1 2 3 4 s__________ 366-0220-00 KNOB, charcoal— POSITION each knob includes: 213-0020-00 SCREW, set, 6-32 x 1 /, inch, HSS...
  • Page 115 Mechanical Parts List— Type 1A1 FIG. 1 FRONT (cont) Fig. & Index Tektronix Serial/Model No. Description Part No. Disc 1 2 3 4 5 SWITCH, wired—VOLTS/CM (Channel 2, rear} 1-16 262-0717-00 switch includes: SWITCH, unwired 260-0560-00 WASHER, plastic, 0.254 ID x 0.500 inch OD...
  • Page 116 Mechanical Parts List— Type TA1 FIG. 1 FRONT (cont) Fig. & Index Tektronix S e rial/M odel No. Description Part No. Disc______ 1 2 3 4 5 ___________________________ PLATE, sub-panel 387-0792-01 1-44 RESISTOR, variable mounting hardware for each: (not included w/resistor) NUT, hex., adapter, V...
  • Page 117 Mechanical Parts List— Type 1A1 FIG. 1 FRONT (cont) Fig. & Index Tektronix Serial/Model No. Description Part No. Eff____________ Disc______ y 5_______________________________________ ASSEMBLY, circuit board— INPUT (Channel 1) 670-0265-00 22919 2 0 0 0 0 ASSEMBLY, circuit board— INPUT (Channel 1)
  • Page 118 Mechanical Parts List— Type 1A1 FIG. 2 REAR Fig. & Index Tektronix Serial/Model No. Description Part No. Disc SHIELD 337-0577-00 mounting hardware: (not included w/shield) SCREW, 4-40 x % inch, PHS 211-0014-00 210-0004-00 LOCKWASHER, internal, # 4 210-0406-00 NUT, hex., 4-40 x 3 /w inch...
  • Page 119 Mechanical Parts List— Type 1A1 FIG. 2 REAR (cont) Fig. & Index Tektronix S erial/M odel Description Part No. Disc _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...
  • Page 120 Mechanical Parts List— Type 1A1 FIG. 2 REAR (cont) Fig. & Index Tektronix Serial/Model No. Description Part No. Disc 2-41 RESISTOR mounting hardware: (not included w/resistor) 211-0544-00 SCREW, 6-32 x % inch, THS 210-0478-00 NUT, hex., resistor mounting 211-0507-00 SCREW, 6-32 x */u inch, PHS...
  • Page 121 Mechanical Parts List— Type 1A1 FIG. 3 CIRCUIT CARDS & STANDARD ACCESSORIES Fig. & Index Tektronix S erial/M odel No. Description Part No. Disc 1 2 3 4 5 670-0075-01 ASSEMBLY, circuit card— INPUT CHANNEL 1 assembly includes: 388-0560-01 CARD, circuit...
  • Page 122 ALT and CHOP modes CAUTION on diagram 5 are not time-related. If the Type 1A1 is used with the Type 544, 546 or 547 Oscilloscope and the plug-in extension Time/Cm See waveforms is used, be sure to pull the Oscilloscope plug-in...
  • Page 123 > 3 > 1 6 > > 5 P I I 5 t E I M P O R T A N T m o t e f o r V O L T A G E . A k ID W A V E F O R M C O U D l T l O N ' s S / N...
  • Page 124 X i O LRIO&A t-R-l Q8B LRIQ7A LR j07b L R I O S A L R I Q 5 B L R I Q 6 A L R I 0 6 B lo.4^Hi ( |Q . 4-/O M 1 (0/754^3 0 .
  • Page 125 + 2 2 S V C H I S IG N A L T H R U S W 4 0 5 (NORM) . 5 V / C M TO T E R M 13 ^ T Y P E 1 A 1 V O L T A G E S W A V E F O R M S...
  • Page 126 WORM O ^ jO 5W4S5 IN V E R T Q “ 15 OV P U L L F O R IN V E R T ] ---------------------- C H 2 S IG N A L T H R U S W 4 3 5 (WORM) T O T E R M 6 - + IO O V...
  • Page 127 O U T P U T A M P L IF IE R C A R D R E F E R E N C E D R A W IN G S : T Y P E 1 A 1 V O L T A G E S W A V E F O R M S I IN P U T A M P L IF IE R...
  • Page 128 CHOPPED BLANKING SWEEP SLAVE P ULSE A LT-TR A C E SYNC-PULSE = > /N 2 0 , 0 0 0 - U P TYPE IAI PLUG-IN SWITCHING CIRCUIT <§>...
  • Page 129 http://manoman.sqhill.com...
  • Page 131 FIG. 3 CIRCUIT CARDS & ACCESSORIES CHANNEL 2 INPUT CHANNEL I INPUT OUTPUT AMPLIFIER TYPE 1A1 DUAL-TRACE PLUG-IN UNIT...
  • Page 132 MANUAL CHANGE INFORMATION At Tektronix, we continually strive to keep up with latest electronic developments by adding circuit and component improvements to our instruments as soon as they are devel­ oped and tested. Sometimes, due to printing and shipping requirements, we can't get these changes immediately into printed manuals.
  • Page 133 TYPE 1A1 P ag e 1 o f 2 ELECTRICAL PARTS LIST AND SCHEMATIC ADDITIONS ADD: C l 18 2 9 0 -0 2 6 7 -0 0 1 (J.F 35 V C121 3 .3 )j.F 2 9 0 -0 2 4 6 -0 0...
  • Page 134 P age 2 o f 2 TYPE 1A1 p a r t i a l C H A K J K J E L I NPUT A M P L I F I E R M 16,0 2 5 /1 2 6 9...
  • Page 135 TYPE 1A1 TENT SN 27290 ELECTRICAL PARTS LIST AND SCHEMATIC CORRECTION CHANGE TO: R300 3 0 8 -0 3 1 4 -0 0 680 fl M 16,2 7 1 /4 7 0...
  • Page 136 TENT SN 27890 TYPE 1A1 ELECTRICAL PARTS LIST CORRECTION CHANGE TO: BNC, fe m a le 1 3 1 -0 9 5 5 -0 1 J 1 0 1 BNC, fe m a le 1 3 1 -0 9 5 5 -0 1...
  • Page 137 TYPE 1A1 ELECTRICAL PARTS LIST CORRECTION CHANGE TO: 500 fl, V ar R 4 0 8 1 3 1 1 -0 4 2 2 -0 0 500 fl, V ar R 4382 3 1 1 -0 4 2 2 -0 0...