Tektronix 11A34 User Reference Supplement
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Tektronix 11A34 User Reference Supplement

Four channel amplifier
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TEK
Supplement
llA34
Four Channel
Amplifier
Please check for CHANGE INFORMATION in the rear of this manual.
First Printing FEE 1987
Revised OCTi987
Part No. 070-5921-00
Product Group 47
S e r i a l
N u m b e r -
-

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Summary of Contents for Tektronix 11A34

  • Page 1 Part No. 070-5921-00 Supplement Product Group 47 llA34 Four Channel Amplifier S e r i a l N u m b e r - Please check for CHANGE INFORMATION in the rear of this manual. First Printing FEE 1987 Revised OCTi987...
  • Page 3 Tektronix United Kingdom, Ltd., London 3aoooo 700000 Tektronix Holland, NV, Heerenveen, The Netherlands Tektronix, Inc.. 1987. All tights resewed. Tektronix products are covered by US. and foreign patents, issued and pending. TEKTRONIX, INC. SCOPEMOBILE and are registered trademarks. Printed in U.S.A.
  • Page 4 Dual trace Up to 300 MHz bandwidth (in 114M) Calibrated sensitivities from 1 mV to 10 V/division High-resolution, calibrated DC offset (0.25 division/increment, coarse; 0.025 Fast ovwdrive recovery Signals applied to the CH I, CH 2, CH 3 and M 4 input co~ectors can be displayed or removed from the display by pressing the display on/off buttons adjacent to the input connectors.

  • Page 5: Table Of Contents

    Contents Part l-General Information Technical Manuals ....................... Plug-in to Mainframe Compatibility ................ Installing and Removing t h e llA34 ........+........Packaging for Shipment ....................Mainframes Part 2-Operatig the llA34 in 11301 and 11302 Display On/off .._*....................Other Functions ..........
  • Page 6 Appendix A-Glossary ........A-l Appendix B-hstrument Documentation .
  • Page 7 Illustrations Installing a plug-in unit in a mainframe osdllosope ....*. _ .+..t ..14 coupling capacitors in plug-in amplifiers ......2-3 2 - 2 2 - 3 Overdrive recovery using long (top) and short (bottom) cables...

  • Page 8: Part L-General Information

    Part 1 General Information Technical Manuals ‘his Supplement to the mainframe Inspection Procedure manual are standard accessories to the IlAX For a list of Contents of this Supplement This Supplement contains the following five park Part I-GENERAL INFORhJATION, compatibility, explains how to install and remove the about packaging for shipment.

  • Page 9: Ia34 Service Manual

    Section 7-SCHEMATIC ILLUSTRATIONS. Plug-in to Mainframe Compatibility mainframe. Details about bandwidth are included in Part& Specification, of this Supplement, and in the Tektronix Corporate Catalog. Refer to the Corporate C&lag for complete compatibility information. Initial Inspection It should be free of mars or scratches and should meet all elech-ical specifications.

  • Page 10: Operating Temperature

    Operating Temperature and twc and can be stored in ambient temperature3 from 4P to t7sT. After storage at temperatures outside the operating limits, Aow the chassis to reach Installing and Removing the llA34 To awid instrument dmmgc set the mainframe ON/STANDBY switch to STANDBY STANDBY the mainframe...
  • Page 11 Installing and Removing the llA3 Figure 1-I. Installing a plug-h unit in a mainframe oscilloscope. Instrument Options Option 23 indude four P6134 probe%...

  • Page 12: Packaging For Shipment

    Packaging for Shipment material can be saved and reused for this pu’p~se+ NOTE If the llA34 is to be shippad to a Tekaonix Service Center for service or repair, Name and address of the instrument owner; . Name of a person at your firm who can ba contacted about the instrument; Complete instntrnent type and serial nun-&r, and A da=cription of the service quired.

  • Page 13: Display On/Off

    Display On/Off The llA34 has only four front-panel contmols-the display on/off buttons. Pressing a display on/off button will cause its chamwL and signal, to be displayed or removed from the display (the function “toggles”). When a channel is displayed, its label ((311, Cl-I 2, CK 3, or CH 4) will be lighted. Selecting Coupling, HF Limit, and Impedance To select the desired setting for Coupling, FIF Limit, 0~ Impedance, proceed as follows:...

  • Page 14: Other Functions

    Other Functions the 11301 or11302mainframe,and their operation is described in detail in Section 2, Operating Information, of the informationabout operatingthe llA34. Functions And Where They Are Desa-ibed Function Waveform Acquisition: Vertical Menu; or for X-Y Display: Horizontal Menu. Waveform Acquisition: VerticaI Menu. Acquisition: Waveform Menu.

  • Page 15: Hf Limit

    Position and Offset The llM4 attempts to maintain the user-selected offset volwge even though theoffset rangechangesduetoachangeinsensitivity. range of 1 mV/diWon to 10 V/division. A skcted offset of greater than one volt is beyond the offset range for the most sensitive settings and will be reset to one volt when the sensitivity is increased to any value between 995 1 mV/divisioh Two four-pole (24 dB/octave)

  • Page 16: Adding Waveforms

    Overdrive Recovery approximately ‘15 divisions. The 11A34 hes extraordinarily good overdrive recovery, and this feature may be wed to greatly extend measurement resolution. For example, suppose a signal the signal stabilized immediately at +0.8 V or if perhaps had some small...
  • Page 17 50 ns/division sweep rate. Now iraeaee the cable length by about three feet (for example, use a 424nch length of RG58 cable, Tektronix part 012435701) and observe the new waveform. See Figure Z-2.
  • Page 18 Overdrive Recovery The waveform cbmge is due to skin effect loss in the longer cable. What is total cable delay is only 5 ns. At 4W 11s the loss is still 0.02%. This experiment shows tba importance of using a short cable to test overdrive A second surprise is that skin effezt loss disappears almost completely (after two cable delays) when one end is unterminated.

  • Page 19: Active Probe

    When the input impedance is set to 5CQ and the input voltage substantially 1 MQ and the mainframe will disptay the message: “Input charmel N overload on LEIT/CENTER/RIGm plugin,” where N = 1,2,3, or 4. To reset the input to 5ZQ first correct the overload condition, then impedance Active Probes Using an active probe, such as the P6231, eliminates two options: A...
  • Page 20 Probe ID Probe ID Utility menu. Autos-et is the automatic setup of vertical display, e.g., two to five divisions of vertical deflection two to five repetitions of the input signal. For more information, refer to Autoset in the 11301 and 11302 User’s Referqrce manual. feature can be enabled or disabled using the Probe ID utility menu.
  • Page 21 GPIB and RS-232-C Commands and Syntax Header COWLING: 2SOE.6 HF Limit Impedance Sensitivity 20E-4 ME”6 MOE-6 SE-3 2 to 4.98 ME-3 5 to 20 The 11A34 amwe a Units query with a...
  • Page 22 PROBE: inditing what type probe is com-mted If a Level 2 TEKPROBE is connected, the query Tespollse is ‘NONE.” Legend: L, C, and R mm Left, Center, and Right plug-in Channel 3, and Channel 4, Aspeaively. Quoted string dab. Part 2)peratlt-g the llA34 in 11301 and 11302 Mainframes...

  • Page 23: Display On/Off

    Part 3 Operating the llA34 in 11401 and 11402 Mainframes Display On/Off The llA34 has only four front-panel controlsthe display on/off buttons. channel, Pressing a display on/off button will cause its and signal, to be displayed or removed from the display (the function “toggles”). When a channel is displayed, its label (CH 1, Ckl2, (313, CH 4) will be lighted.

  • Page 24: Vertical Offset

    Vertical Offset The 11401 and 11402 oscilloscopes use offset to position the hate on the screen. determines in unit provides the X component of an XY display, offset controls horizontal position. volts. Offset subtracts a precision voltage from the input signal. To access the offset function, touch the double-ended arrow at the left edge of the offset is then assigned to the Lower Control knob.
  • Page 25 IX Circuit Loading Location of AC coupling capacitors circuit input mnnectar to ground. Take care that the when more than 25 Vdc is present at the X4.34 input will tztzd the pmkitiputvalfage could musenn error in mlibmtion. llA34 3-3...
  • Page 26 Adding and Subtracting Waveforms waveforms without rMriclion. The reason for this lies in the manner in which samples are taken and usad by the mainframe. Each plug-in compaztmant an assdated sampler in the 11401 or 11402. Samples ara taken simultaneously from that of another plugin unit accurately by virtue of this simultaneity.

  • Page 27: Overdrive Recovery

    An interesting experiment is to use a very flat generator’s fast-rise output to the Il.434 input through a short (one foot or less) volt Set the 11A34 sensitivity to 1 mV/division. Each division now represents 0.1% of the input signal. Trigger the osdlloscope and observe the recovery of the llA74 using 50 ns/division sweep rate.
  • Page 28 Overdrive Recoverv 3. z.55mv using Short terminated in 50 R Traces are o&et two divisions and the illustration is a composite of two waveforms. Without :current, the cable develops no series voltage drop. See Figure 3-3. Part SOpmating the llA34 in 11401 and 11402 Mainframes...
  • Page 29 3. t75mV ,,,. 7 .-'~ waveforms. composite of two...

  • Page 30: Active Probes

    When the input impedance is set to 5OQ and the input voltage subs~tially overload, disconnect the M a input exceeds 5 Vrms, the 1 will sense @e To reset the input impedance to 50 4 first correct the overload condition, then Active Probes Using an active probe, such as the p6231, eliminates two options: AC Coupling and 1 MR input impedance.
  • Page 31 Probe ID COMBINATION WAVEFORM SELECTED CORRESPONDING PARAMETERS DEFINE WAVEFORM WITH ID N AS DEFAULT WAVEFORM THE VERTICAL DESCRIPTION AND THE HORIZONTAL DESCRIPTION MUST BE CHECKED FOR THE OCCURRENCE OF ID N. Figure S4 Sequence of decisions used lu select a new waveform in response to probe ID button Function If the Probe...

  • Page 32: Front-Panel !&Or Messages

    Front-Panel Error Messages plug-in unit, whereN =:I, 2,3, or4. Cause: indicates defective usually hardware. Jn this situation, the plu+n unit sets the DAC to the limit nearer the tpguested Wing. Message: or ken improperly connected.
  • Page 33 The followingcu 2OE-3 to 49.8E-3 500E-6 2 E - 3 5fi-3 lto1.99 2 to 4.98 3-11...
  • Page 34 This quely-onIy link r.ztums a quoti string to the input. If a Level 1 TEKPROBE is If a Level 2 TEKPROBE is connected, the nor Level 2 TEKPROBE is connected., the Channel 3, and CImneI 4, rss@veIy,. COUPLING SENSITIVITY waveforms. Quoted wing date;...

  • Page 35: Part P-Specification

    Part 4 Specification Performance The specifmtions that follow apply wheo the instrument is in the condition Conditions of Enhanced Accuracy. Enhawed Accuracy is obtained by performing an Enhanced Calibration in the spedfic host mainframe after the system has reached thermal equilibrium, which requires 20 minu&warmup. Enhanced Accuracy is indicated on the pt display and remains in effect a6 long as the at wbiih the calibration was performed.
  • Page 36 TABLE 41 kontl Characteristic DISPLAY (con0 DEFLECTION FACTOR &rditily), cant AV DC Arc I in20%+2mv) I ~1.1%*0.Mdlv) I ~lc8rlV + OxdiV) Without Probes AV DC Act DC offset *cc I ti0.w +am2div) I tioJ.o% l 056ny) With P6134 Robe alibnted from 11401/11402 Calibntor output I zt(ixnlv+o.lMiv) I diO25% + 5mw I wz59i+5hw...
  • Page 37 Electrical characteristics TABLE&l (con0 Characteristics Characteristic C - R e s o l u t i o n I 1,2,5 sequence. Factor, follows: Rotating the Rne control one increment will change the Deflection Factor by 1% of the next mar+sensitive Coarse setting. For warnpie, with deflection factor set to 198 mV, rotating the Fiie will cause the reverse sequence (202 mV, 200 mV, OFFSET...
  • Page 38 TABLE 41 (con0 Characteristic Performance Requirement DISPLAY (core) High Frequency knit 2 mV -4.98 point High Frequency-ZdB I 2oMHzm%. point, ac coupled Display, Trig. and Auxiliary si@s llA34...
  • Page 39 Performance Reauixetttent characteristic Maximum Input Voltage, 20 dB per d&e from 1 MHz to AC Coupled, 2 = 1 Mn 5.0 Vat 100 MHZ. 5 vm-ls (05 WI or 05 watt-second pukes AC or DC Coupled, 2 = 50~2 not exceediig 25 v pea. coupled) 1 MR within l/2% in parallel with Input Impedance...

  • Page 40: Electrical Characteristic3

    Electrical Characteristics TABLE 41 kc& Performance Requirement MISCELLANEOUS Overdrive Recovery Time 1 mV to 9.95 mV/div I =zonsm1.0%forVinofQOV. 100 mV to 995 Typical Noise 0.12 div, lllls 20 mv to 4.98 fnv/div 5.0 mv to 9.95 mv/div 0.014 div, rma. 0.014 div, rms.
  • Page 41 TABLE 4-Z Five days, per MIL-T-28801X. Type Ill, Humidity, Operating Nonoperating 4 5 5 . 1 2 2 . To 4,570 m (15,1X0 ft.). To 15,203 m kQCO3 ft.). operating. instakd on Flexible Extender I lypem,cJa5s5. and Shock Vibration and Eounce Meets ASlM D999-75, Method A of Packaged Product I (NsTAProject lA-El).

  • Page 42: 4-A

    :I RefertoFhre4-1. Recommended Probes Tektronix recommends these pruks for use with the 11~34: input impedance ia 10 MCI in parallel yith 105 pF. The I’6134 is a Level 1 bandwidth of 15 GHz, input impedance of 450 Q, and dc offset of +5 V...
  • Page 43 Physical Characteristics TOP FIGURES ARE IN MILLIMETERS TOP FIGURES ARE IN MILLIMETERS AND BOTTOM FIGURES ARE IN ,NC”ES. AND BOTTOM FIGURES ARE IN ,NC”ES.
  • Page 44 The ratio of input si@ to response in the llC0l Deflection factor system. The r+mcal of sensitivity. The front-panel, plug-in button that designates a Display on/off button display. Mainframe Any 11oo(keries oscilloscope exclusive of plug-in offset A conlml that allows the user to subtract a precision voltage thn the inpu t signal to vary the position of the displayed sigml.
  • Page 45 Appendix B-Instrument Documentation the 11301/11%.2and its operation. Introducing the 11401 and 11402 Digitizing Oscillompff. Intended for operation. 11301 and 11302 User’s Reference manual contains detailed information about measurements the instruments can make, and instructions about how to set the otiIIoxope to perform such measurements. Also, installation the 11301/11X? with the GPIB and FS232-C interfam are included here.

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