TEKTRONIX 11A71 AMPLIFIER
Contents
1. When installed in any 11401 or 11402 plug in compartment or in the 11301 11301A 11302 or 11302A left or center plug in compartment the 11A71 will provide a conventional display When installed in the center or right plug in compartment of the 11301 11301A 11302 or 11302A the 11A71 will also provide the X horizontal part of an X Y display or provide a trigger signal for the mainframe time base To install the 11A71 in any 11000 series oscilloscope mainframe set the mainframe ON STANDBY switch to STANDBY Align the grooves in the top and bottom of the 11A71 with the guides in the mainframe plug in compartment then insert the 11A71 into the mainframe until its front panel is flush with the front panel of the mainframe To remove the 11A71 from a mainframe set the mainframe ON STANDBY switch to STANDBY Then pull the release latch see Figure 1 1 to disengag the unit from the mainframe and pull the 11A71 straight out of the plug in compartment VQ A71 User Reference Supplement Scans by ArtekMedia 2006 General Information TOP GROOVE BOTTOM GUIDE NN RELEASE LATCH Figure 1 1 Installing a plug in unit in a mainframe oscilloscope 11A71 User Reference Supplement 65 Scans by ArtekMedia 2006 General Information Instrument Options Option 26 includes one P6231 probe Packaging for Shipment 1 6 If this instrument is to be shipped by commercial transportation we recommend that it be pack2. EEPROM The probe data is intended to be read once at instrument power up or when the probe is first connected to a plug in unit that is at probe power up 4 4 11A71 User Reference Supplement Scans by ArtekMedia 2006 Specification TABLE 4 2 Environmental Characteristics Characteristic Ambient temperature External to main frame Operating within specs Nonoperating Humidity Operating and Nonoperating Altitude Operating Nonoperating Vibration Operating installed on Flexible Extender Shock Nonoperating not installed in mainframe Bench Handling operating and nonoperating Packaged Product Vibration and Shock Vibration and Bounce of Packaged Product Drop of Packaged Product Electromagnetic Compatibility 11A71 User Reference Supplement Information 0 to 50 C mainframe ambient 40 to 75 C Five days per MIL T 28800C Type III class 5 as described in 3 9 2 2 and 4 5 5 1 2 2 To 4 570 m 15 000 ft To 15 200 m 50 000 ft MIL T 28800C Sec 4 5 5 3 1 type III class 5 MIL T 28800C Sec 4 5 5 4 1 type III class 5 MIL T 28800C Sec 4 5 5 4 3 type III class 5 Meets ASTM D999 75 Method A NSTA Project 1A B 1 Meets ASTM D775 61 Paragraph 5 NSTA Project 1A B 2 MIL STD 461B FCC Part 15 Subpart J Class A VDE 0871 6 78 Class B 4 5 Scans by ArtekMedia 2006 Specification Table 4 3 Physical Characteristics Char
3. the display on off button Pressing a display on off button will cause channel 1 and its signal to be displayed or removed from the display the function toggles When channel 1 is used for display its label CH 1 will be lighted Selecting Coupling To select the desired setting for Coupling proceed as follows la If no trace is displayed press the plug in display on off button to create a trace 1b If several traces are displayed select a one by touching the desired trace description at the top of the CRT 2 On the 11301 and 11302 oscilloscopes press any VERTICAL button once OFFSET SIZE or POS On the 11301A and 11302A oscilloscopes press any VERTICAL button twice This will cause the Control Menu to be displayed 3 Touch the coupling label Successive touches will change its state 11A71 User Reference Supplement 2 1 Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes Other Functions Other 11A71 functions are controlled within the 11300 series mainframe and their operation is described in detail in Section 2 Operating Information of the 11301 and 11302 User Reference Manual and the 11301A and 11302A User Reference Manual Table 2 1 shows where to find information about operating the 11A71 TABLE 2 1 Functions and Where They are Described Function Described Under Heading Offset Waveform Acquisition Vertical Menu Size V div or for X Y Display Horizontal Menu Display Select C
4. MHz bandwidth in 11402 e Single trace e Calibrated sensitivities from 10 mV to 1 V division e 50 Q input impedance e High resolution calibrated DC offset 0 25 division increment coarse 0 025 division increment fine Functions Signals applied to the CH 1 input connectors can be displayed or removed from the display by pressing the display on off buttons adjacent to the input connector All other 11A71 functions are controlled through the host mainframe Such mainframe controlled functions are e Sensitivity over a range of 10 mV to 1 V division in a 1 2 5 sequence e Vertical Offset over a range of 10 divisions e Coupling AC DC or Off 11A71 User Reference Supplement Scans by ArtekMedia 2006 Contents Section 1 General Information Contents of this Supplement cccossseccsesssesssseecsersrseessensessassceascrsorsensoeeeses TLAZ 1 Service Manual recano sinnn a aaaea Plug in to Mainframe Compatibility sesseseseessseseeersesseseceseosnasavessessernsesneenss Initial Inspection esesessesesesseesreeoreerereseveesososenevesessosrereereeerserevererorreeoreeossesesss Operating Temperature e sssseesressrssovossosossrososessssssssoseesssoseretsuesseesrosesessesssosrees Installing and Removing the 11A71 sssssssessessstetetereseccnsneensnsesesseneneeensens TAS CRUE TIE Opio Sprain aaa cacao Packaging for Shipment es esessessoesssssssessosasosossossscsceseoeeoesesseseeseses
5. by ArtekMedia 2006 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 developed and tested Sometimes due to printing and shipping requirements we can t get these changes immediately into printed manuals Hence your manual may contain new change information on following pages A single change may affect several sections Since the change information sheets are carried in the manual until all changes are permanently entered some duplication may occur If no such change pages appear following this page your Manual is correct as printed Scans by ArtekMedia 2006
6. section of the Utilities subsection in the 11401 and 11402 User Reference Manual Pressing the probe ID button can initiate one of the following operations 1 If the Probe ID function in the Probes pop up menu of the Utility major menu is set to Sequence Settings the next front panel setting will be recalled If the Probe ID Function is not set to Sequence Settings then operation 2 or 3 which involve a new waveform and waveform selection will occur If the Sequence Settings option is enabled front panel settings can be sequentially recalled via the Probe ID function The settings must be stored as explained under Storing and Recalling Waveforms in the 11401 and 11402 User Reference Manual 2 If the Probe ID Function in the Probes pop up menu of the Utility major menu is set to Waveform Select New Wfm a waveform will be selected Figure 3 2 shows the sequence of decisions used to select a new waveform 11A71 User Reference Supplement 3 5 Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes 3 If the Probe ID Function is set to Wim Select New Wim amp AutoSet then the decisions shown in Figure 3 2 will be made and the resulting selected waveform is autoset Events 1 2 and 3 are mutually exclusive Event 4 may be combined with any one of them 4 If the IDPROBE SRQMASK is enabled an appropriate event will be returned to the GPIB and RS 232 C ports PROBE ID N ACTUATED SINGLE CHANNEL SIN
7. ENSITIVITY qstring L C and R mean Left Center and Right plug in compartments 1 means Channel 1 Sets the specified channel input coupling Sets the specified channel offset Sets the HF Limit bandwidth of the specified channel Numeric representation Sets the input impedance of the specified channel Sets the deflection factor of the specified channel Sensitivity is a channel specific command which does not apply to compound waveforms Quoted string data 11A71 User Reference Supplement Scans by ArtekMedia 2006 Section 3 Operating the 11A71 in 11400 series Mainframes Display On Off The 11A71 has only one front panel control the display on off button Pressing the display on off button will cause channel 1 and its signal to be displayed or removed from the display the function toggles When channel 1 is used for display its label CH 1 will be lighted Other Functions All other 11A71 functions are controlled within the 11401 or 11402 oscilloscope and their operation is described in the 11401 and 11402 User Reference manual Table 3 1 shows where to find information about operating the 11A71 TABLE 3 1 Functions and Where They are Described Function Described under Heading Position Vertical Size and Position Vertical Size V div Vertical Size and Position Coupling AC DC Off Selecting Channel Coupling under Waveform Control Select 11A71 Channel Waveform Control an alternative to pre
8. GLE CHANNEL WAVEFORM SELECTED WAVEFORM EXISTS CORRESPONDING TO CORRESPONDING TO ID N KNOBS CONTROL ID N ID N PARAMETERS COMBINATION WAVEFORM SELECTED CORRESPONDING TO ID N KNOBS CONTROL ID N PARAMETERS SINGLE COMBINATION WAVEFORM EXISTS WITHIDNA COMPONENT TOGGLE WAVEFORM MULTIPLE WAVEFORMS SELECTION TO NEXT EXIST WITH IO N WAVEFORM IN LIST A COMPONENT AFTER SELECTION KNOBS CONTROL ID N PARAMETERS DEFINE WAVEFORM WITH ID N AS DEFAULT WAVEFORM NOTE BOTH THE VERTICAL DESCRIPTION AND THE HORIZONTAL DESCRIPTION MUST BE CHECKED FOR THE OCCURRENCE OF IO N C5922 303 Figure 3 2 Sequence of decisions used to select anew waveform in response to probe ID button 3 6 11A71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes Front Panel Error Messages Message Cause Message Cause 11A71 User Reference Supplement Internal DAC overflow on channel 1 of LEFT CENTER or RIGHT plug in unit Some plug in unit detected that a requested setting overflowed an internal DAC Such overflow usually indicates defective hardware In this situation the plug in unit sets the DAC to the limit nearer the requested setting Bad Leve 2 orobe checksum on channel 1 of LEFT CENTER or RIGHT plug in unit Some plug in unit detected that a Level 2 TEKPROBE had failed or been improperly connected Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series M
9. R1 gt COUPLING OFFSET BW NRx IMPEDANCE SENSITIVITY qstring 11A71 User Reference Supplement Operating the 11A71 in 11400 series Mainframes L C and R mean Left Center and Right plug in compartments 1 means Channel 1 Sets the specified channel input coupling Sets the specified channel offset Sets the HF Limit bandwidth of the specified channel Numeric representation Sets the input impedance of the specified channel Sets the deflection factor of the specified channel Sensitivity is a channel specific command which does not apply to compound waveforms Quoted string data Scans by ArtekMedia 2006 Section 4 Specification Performance Conditions Circuit Display Deflection Factor Sensitivity The specifications that follow apply when the instrument is in the condition of Enhanced Accuracy Enhanced Accuracy is initiated by pushing the E A button on the specific host mainframe after the system has reached thermal equilibrium which requires 20 minutes warmup Enhanced Accuracy is indicated on the CRT display and remains in effect as long as the mainframe internal temperature change is less than 5 C from the temperature at which the calibration was performed When the 5 C change does occur the accuracy condition becomes Not Enhanced In the Not Enhanced condition those Characteristics that are temperature sensitive may not remain within the limits of these specifications The instrument
10. TE K User Reference Part No 070 6288 01 Supplement Product Group 47 11A71 Amplifier Serial Number Piease check for CHANGE INFORMATION at the rear of this manual Second Edition SEP 1988 Tekt a ronc COMMETTED TO EXCELLENCE Scans by ArtekMedia 2006 Scans By Artek Media Artek Media 1042 Plummer Cir SW Rochester MN 55902 www artekmedia com High resolution scans of obsolete technical manuals if your looking for a quality scanned technical manual in PDF format please visit our WEB site at www artekmedia com or drop us an email at manuals artekmedia com and we will be happy to email you a current list of the manuals we have available lf you don t see the manual you need on the list drop us a line anyway we may still be able to point you to other sources If you have an existing manual you would like scanned please write for details This can offen be done very reasonably in consideration for adding your manual to our library Typically the scans in our manuals are done as follows 1 Typed text pages are typically scanned in black and white at 300 dpi 2 Photo pages are typically scanned in gray scale mode at 600 dpi 3 Schematic diagram pages are typically scanned in black and white at 600 dpi unless the original manual had colored high lighting as is the case for some 70 s vintage Tektronix manuals If you purchased this manual from us typically through our Ebay name of ArtekMedia thank you ve
11. Volts Div DC Offset Acc 100 mV to 1V 0 15 2 mV Probe Tip TC term Accuracy See Deflection Factor Accuracy which precedes this characteristic Range Resolution 10 div Coarse and fine resolution are 0 25 and 0 025 div respectively High Frequency Limit 3 dB point and Calculated Rise Time 20 to 30 C Type of Mainframe Volts Division 11301 A 11302 A 11401 11402 400 MHz 500 MHz 500 MHz 1000 MHz 0 9 ns 0 7 ns 0 7 ns 0 35 ns Low Frequency 3 dB point 1 kHz maximum from 50 Q source AC coupled Display and Trigger signals 1 For absolute DC accuracy of single point measurements using Offset and the DC Offset Accuracy DC Balance and AV DC Accuracy terms Apply the AV DC Accuracy only to the difference between the Vertical Position setting and the measurement point 11A71 User Reference Supplement Scans by ArtekMedia 2006 TABLE 4 1 cont Specification Electrical Characteristics Input Maximum Input Voltage AC or DC Coupled Maximum DC Input Voltage AC Coupled Performance Requirement 5 Vrms 0 5 W or 0 25 watt second pulses not exceeding 25 V peak lt 100 V DC peak AC Signals of more than 25 V peak amplitude must be connected with the input coupling set to OFF so that the input coupling capacitor ts precharged Input Disconnect Threshold Input Protection Disconnect Time Power Down Condition Impedance DC coupled Impedance AC
12. acteristic Information Weight max 2 lb 0 oz 908 grams Weight of Packaged Product max 4 Ib 14 oz 2213 grams Dimensions max Refer to Figure 4 1 Recommended Probes Tektronix recommends the P6231 Probe for use with the 11A71 It has the following characteristics P6231 Low Impedance Subminiature 10X Active Probe The P6231 has a bandwidth of 1 5 GHz input impedance of 450 Q and DC offset of 5 V controlled by the 11A71 The P6231 is a Level 2 probe 46 A7 User Reference Supplement Scans by ArtekMedia 2006 Specification NOTE TOP FIGURES ARE IN MILLIMETERS AND BOTTOM FIGURES ARE IN INCHES C6288 401 Figure 4 1 Dimensions of 11A71 11A71 User Reference Supplement 4 7 Scans by ArtekMedia 2006 Appendix A Glossary Deflection factor The ratio of input signal to response in the 11000 system The reciprocal of sensitivity Display on off button The front panel plug in button that designates a channel for display or removes a channel from the display Mainframe Any 11000 series oscilloscope exclusive of plug in units Offset A control that allows the user to subtract a precision voltage from the input signal to vary the position of the displayed signal ON STANDBY The front panel power control on 11000 series mainframes When set to ON applies operating power to all circuits When set to STANDBY the mainframe DC power supply supplies power to the counter timer crystal oven Op
13. aged in the original manner The original carton and packaging material should be saved and reused for this purpose NOTE Package and ship plug in units and mainframes separately If the 11A71 is to be shipped to a Tektronix Service Center for service or repair attach a tag to the instrument On the tag include the following information e Name and address of the instrument owner e Name of a person at your firm who can be contacted about the instrument e Complete instrument type and serial number and e A description of the service required If the original package is not available or is not fit for use package the 11A71 as follows 1 Obtain a corrugated cardboard carton with inside dimensions at least six inches greater than the instrument dimensions Use a carton with a test strength of at least 200 pounds 2 Fully wrap the 11A71 with anti static sheeting or its equivalent to protect the finish 3 Cushion the 11A71 on all sides by tightly packing dunnage or urethane foam between the carton and the instrument Allow three inches of packing on each side 4 Seal the carton with shipping tape or with industrial staples 5 Mark the address of the Tektronix Service Center and your return address on the carton in one or more prominent places 11A71 User Reference Supplement Scans by ArtekMedia 2006 Section 2 Operating the 11A71 in 11300 series Mainframes Display On Off The 11A71 has only one front panel control
14. ainframes GPIB and RS 232 C Commands and Syntax The following commands set parameters of a specified channel Table 3 2 Channel Parameter Commands for 11400 series Oscilloscopes CH lt L1 C2 or R1 gt COUPLING AC DC OFF OFFSET lt NRx gt Resolution via RS 232 C GPIB or Numeric Entry Step Size via front panel Control knob Volts div Offset Range Coarse 0 25 div Fine 0 025 div lt NRx gt Bandwidth 500E6 11401 JOOOE6 11402 50 SENSITIVITY Sensitivity 10E 3 20E 3 50E 3 100E 3 200E 3 500E 3 1 UNITS lt qstring gt query only The 11A71 answers a Units query with a units status message which indicates the units of conversion of a probe connected to its Ch N input PROBE lt qstring gt query only This query only link returns a quoted string indicating what type of probe is connected to the input If a Level 1 TEKPROBE is connected the query response is Level 1 If a Level 2 TEKPROBE is connected the query response is Level 2 lt probe_type gt lt serial_number gt When neither Level 1 nor Level 2 TEKPROBE is connected the query response is NONE 1The numbers listed are those available at the input connectors Connecting an attenuating probe will change the value by the probe attenuating factor e g a 10X probe will change the value 10 to 100 3 8 11A71 User Reference Supplement Scans by ArtekMedia 2006 Legend CH lt L1 C1 amp
15. amaged by the 50 Q load Two ways of unintentionally invoking DC coupling in the 11A71 are 1 Invoking Autoset because the Autoset process starts by searching for a DC voltage and 2 Recalling a stored control setting that dictates DC Coupling Switching coupling to DC when more than 25 V ts present at the 11A71 input will exceed the peak input voltage specification and may damage the 11A71 input relay A damaged relay could cause an error in calibration C 11A52 11A71 5002 11A32 11A34 Digitally signed by ARTEK MEDIA DN cn ARTEK MEDIA c US ARTEK MEDIA Shee as Date 2006 02 04 17 40 12 06 00 C5922 203 Figure 3 1 Location of AC coupling capacitors in plug in amplifiers 11A71 User Reference Supplement 3 3 Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes Adding and Subtracting Waveforms The 11401 and 11402 mainframes do not allow the addition or subtraction of live waveforms without restriction The reason for this lies in the manner in which samples are taken and used by the mainframe Each plug in compartment has an associated sampler in the 11401 or 11402 Samples are taken simultaneously by each sampler A channel from one plug in unit may be added to or subtracted from that of another plug in unit accurately by virtue of this simultaneity Thus noise and other signals unrelated to the trigger will be canceled when channels in different plug in units are subtracted Si
16. and Syntax The following commands set parameters of a specified channel TABLE 2 2 Channel Parameter Commands for 11300 series Oscilloscopes CH lt L1 C1 or R1 gt COUPLING AC I DCI OFF OFFSET sy Resolution Step Size Volts div via RS 232 C GPIB via front panel or Numeric Entry Control knob Coarse 0 25 div Fine 0 025 div BWHI lt NRx gt HF Limit 400E6 11301 500E6 11302 SENSITIVITY Sensitivity UNITS lt qstring gt query only The 11A71 answers a Units query with a units status message which indicates the units of conversion of a probe connected to its Ch 1 input PROBE lt qstring gt query only This query only link returns a quoted string indicating what type of probe is connected to the input If a Level 1 TEKPROBE is connected the query response is Level 1 If a Level 2 TEKPROBE is connected the query response is Level 2 lt probe_type gt lt serial_number gt When neither a Level 1 nor Level 2 TEKPROBE is connected the query response is NONE The numbers listed are those available at the input connectors Connecting an attenuating probe will change the value by the probe attenuating factor e g a 10X probe will change the value 10 to 100 11A71 User Reference Supplement 2 7 Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes Legend L1 C1 or R1 gt COUPLING OFFSET BWHI NRx IMPEDANCE S
17. coupled Reflection Coefficient Input Bias Current 20 to 30 C 11A71 User Reference Supplement 5 VDC 1 V 5 VDC 1 V 5 Vrms up to 100 MHz 30 ms or less for 25 VDC or either polarity 40 ms to 150 ms for 12 5 VDC of either polarity 50 Q terminations disconnect when 11A71 is powered down 50 Q within 2 VSWR lt 1 45 1 at 10 mV div DC to 1 GHz VSWR lt 1 25 1 at 20 mV to 1 V div DC to 1 GHz 50 Q within 2 in series with at least 2 2 uF VSWR lt 1 45 1 at 10 mV div DC to 1 GHz VSWR lt 1 25 1 at 20 mV to 1 V div DC to 1 GHz 10 or less total not to exceed 20 pk pk in a 1 GHz time domain reflectometer system 50 pA maximum Scans by ArtekMedia 2006 Specification TABLE 4 1 cont Electrical Characteristics Circuit Characteristic Performance Requirement Miscellaneous Probe Compatibility The 11A71 is compatible with Level 1 and 2 TEKPROBEs 1TEKPROBE is Tektronix name for the interface used with probes designed for the 11000 series of oscilloscopes and plug in units TEKPROBEs have output connectors with one or more spring loaded coding pins Two categories of TEKPROBEs are Level 1 A level 1 probe uses analog encoding to indicate the probe s scale factor to the plug in unit Level 2 A level 2 probe uses an EEPROM to store data about the the probe s transfer units scale factor and output voltage scale factor Such data are serially encoded then stored in the
18. ctrically before shipment and should meet all electrical specifications First inspect the 11A71 for physical damage incurred in transit Secondly to verify that the instrument is functioning properly perform the Functional Test Procedure shipped with the instrument This brief procedure verifies most instrument functions and checks the internal auto calibration references If you find instrument damage or deficiency contact your local Tektronix Field Office or representative Operating Temperature The 11A71 can be operated where the ambient air temperature is between 0 and 50 C and can be stored in ambient temperatures from 40 to 75 C After storage at temperatures outside the operating limits allow the chassis to reach operating temperature limits before applying power 11A71 User Reference Supplement 1 3 Scans by ArtekMedia 2006 a ae a ek le General Information Installing and Removing the 11A71 To avoid instrument damage set the mainframe ON STANDBY switch to STANDBY before installing or removing the 11A71 If the green indicator light remains ON when the STANDBY position is selected the switch has been internally disabled To remove or reinstall plug in units use the mainframe PRINCIPAL POWER SWITCH rear panel to shut OFF the power This will prevent damage to either the plug in or the mainframe To once again enable the ON STANDBY switch refer the instrument to qualified service personnel
19. e Supplement 2 3 Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes Always use caution when working with voltages in excess of 25 volts When the input coupling is set to DC a 50 Q termination resistance is connected directly from the 11A71 input connector to ground Take care that the circuit connected to the 11A71 input will not be damaged by the 50 Q load Two ways of unintentionally invoking DC Coupling in the 11A71 are 1 Invoking Autoset because the Autoset process starts by searching for a DC voltage and 2 Recalling a stored control setting that dictates DC Coupling Switching coupling to DC when more than 25 V is present at the 11A71 input will exceed the peak input voltage specification and may damage the 11A71 input relay A damaged relay could cause an error in calibration Adding Waveforms NOTE Before adding waveforms check that each channel s display is independently on screen The 11300 series oscilloscopes allow the addition of any two channels That is one channel may be added to a channel from another plug in unit A simple restriction applies Each channel must be in its linear operating range This is assured if each channel separately is within the screen area before addition Those portions of a trace which are off screen will not be valid when brought back on screen using another channel s input signal or Offset control This general restriction applies to any dual cha
20. e combinations 11A71 User Reference Supplement 1 1 Scans by ArtekMedia 2006 General Information 11A71 Service Manual The 11A71 Service manual is for use by qualified service personnel only To avoid personal injury do not perform any service other than that contained in the Operators manual unless you are qualified to do so Refer to the Operators Safety Summary and Service Safety Summary before performing any service The 11A71 Service Manual contains the following information Section 1 GENERAL INFORMATION Section 2 THEORY OF OPERATION Section 3 MAINTENANCE AND DIAGNOSTICS Section 4 PERFORMANCE VERIFICATION AND ADJUSTMENT Section 5 INSTRUMENT OPTIONS Section 6 REPLACEABLE ELECTRICAL PARTS Section 7 SCHEM ATIC DIAGRAMS amp CIRCUIT BOARD ILLUSTRATIONS Section 8 REPLACEABLE MECHANICAL PARTS Plug in to Mainframe Compatibility The 11A71 is designed for use in the 11301 11301A 11302 11302A 11401 11402 and future 11000 series plug in mainframes 11A71 bandwidth varies depending on the host mainframe Details about bandwidth are included in Section 4 Specification of this supplement and in the Tektronix Corporate Catalog Refer to the Tektronix Corporate Catalog for complete compatibility information H20 CS i iCiw ATI User Reference Supplement Scans by ArtekMedia 2006 General Information Se Initial Inspection This instrument was inspected mechanically and ele
21. gnals from different channels within a plug in unit are sampled at different times Signals that are entirely repetitive and related to the trigger signal may be successfully added or subtracted in spite of this However signals that are not repetitive or related to the trigger will not be sampled at the same time and may not be displayed correctly Therefore it is preferable that signals to be added or subtracted be selected from different plug in compartments The best common mode rejection is obtained with a differential amplifier plug in unit because its hardware subtracts the signals at its two inputs passing only the result to the mainframe Even when using channels from different plug in compartments the following two problems limit the accuracy of sums or differences 1 Each waveform in memory is constantly being updated and therefore consists of some points that are older than others Although samples may be taken simultaneously there is a chance that a correct sample may be replaced in memory with a newer value before the waveform is processed and displayed 2 Delay differences between channels of different plug in units due to probe cable length differences are normally removed by deskewing the probes and the associated amplifier channel Samples are still taken simultan eously but the display is manipulated to remove time differences Signals correlated to the trigger signal are correctly restored to their proper time relati
22. h 1 Waveform Acquisition Vertical Menu or for X Y Display Horizontal Menu Trigger Selection Trigger Source Major Menu Position and Offset All 11300 series oscilloscopes assign position control to the Left Control knob by pressing the VERTICAL POSition button once The Vertical Position control moves the trace as a user convenience For example when displaying multiple channels it may be desirable to set ground references for each trace on separate graticule lines Position is a screen related function its units are divisions The offset function accessed by pressing the VERTICAL OFFSET button subtracts a precision voltage from the input signal Changing offset moves the trace just as does the position control However if the deflection factor is subsequently changed the effect is different Changing the sensitivity will increase or decrease the size of the display around some screen level e g two divisions above graticule center set by the Position control When using a sensitivity that makes the displayed waveform larger than the screen the Offset control is used to bring the waveform area of interest to the screen location established by the Position control The Position control has a range of plus and minus four divisions from graticule center while the Offset control has a range of 10 divisions 2200 0 C C TA71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mai
23. he input termination and the amplifier from external DC voltages Avoid inadvertently selecting DC coupling if your circuit will be damaged by the resulting 50 Q termination to ground See Caution below The coupling capacitor in the 11A32 and 11A34 does not isolate the input termination from external DC voltages When AC Coupling is selected the 11A52 coupling capacitor allows the user to test low impedance circuits that are elevated in potential by up to 100 volts DC without loading the circuit at DC Passive attenuating probes such as the P6056 or P6057 eliminate the DC loading and lower the low frequency 3 dB point In the Off Coupling mode the AC coupling capacitor precharges in about three seconds to the average DC voltage of the circuit being tested Always use the Off mode when connecting the 11A52 input to a circuit that may have more than 25 volts the 11A52 peak input voltage rating present This will precharge the coupling capacitor Wait a few seconds before selecting AC Coupling The coupling capacitor is discharged upon removal of the external circuit 11A71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes Always use caution when working with voltages in excess of 25 volts When the input coupling is set to DC a 50 Q termination resistance is connected directly from the 11A71 input connector to ground Take care that the circuit connected to the 11A71 input will not be d
24. ia 2006 Section 1 General Information This Supplement to the mainframe User Reference manual and the Functional Test Procedure manual are standard accessories to the 11A71 For a list of related manuals see Appendix B Contents of this Supplement This Supplement contains the following four sections Section 1 GENERAL INFORMATION describes mainframe to plug in unit compatibility explains how to install and remove the 11A71 from a mainframe outlines any options available for the 11A71 and gives details about packaging for shipment Most 11A71 functions and their use are described in the Operating Information section of the mainframe User Reference manuals These functions are those common to all amplifier plug in units Examples of common functions are offset sensitivity input impedance where selectable coupling and bandwidth limit Only functions unique to the 11A71 11300 series or 11A71 11400 series combinations are explained in the following sections Section 2 OPERATING THE 11A71 IN 11300 SERIES MAINFRAMES explains how to operate those 11A71 functions not covered in the 11301 and 11302 User Reference Manual or the 11301A and 11302A User Reference Manual Section 3 OPERATING THE 11A71 IN 11400 SERIES MAINFRAMES explains how to operate those 11A71 functions not covered in the 11401 and 11402 User Reference Manual Section 4 SPECIFICATION gives detailed specifications of all 11A71 mainframe oscilloscop
25. iiccisscsecsssecdeccicdidsccsessscedsucsesacsccsaseocdsedssvocssneasiesevdceeveveducese 11A71 User Reference Supplement Scans by ArtekMedia 2006 iii Contents Appendix A Glossary Appendix B Instrument Documentation Illustrations 3 1 3 2 4 1 Tables 2 1 2 2 3 2 4 1 4 2 4 3 iv Installing a plug in unit in a mainframe oscilloscope s sesssserererseseeeesessess 1 5 Location of AC coupling capacitors in plug in amplifiers sceeseee 2 Location of AC coupling capacitors in plug in amplifiers sssse 3 3 Sequence of decisions used to select a new waveform in response to probe ID button cescssseseessseerserssessesasenessensereesees P 3 6 Dimensions of DEAT LT a secssssessisvseestecntesnsnisisdacsetssnd sasassveencnusoes E 4 7 Functions and Where They are Described sesseesessseerssseesrseesserseescenees 2 2 Channel Parameter Commands for 11300 series oscilloscopes 2 7 Functions and Where They are Described sscsccssesssesetecsseteeessnasasssees 3 1 Channel Parameter Commands for 11400 series oscilloscopes 3 8 Electrical Characteristics 225 scci citspasieesti cee ot ass eect teeta caechesiasdevecdnaes 4 1 Environmental Characteristics sesscsccssscsssssssscssssessssssecsesscsssssssnsesseseeeaees 4 5 Physical C haractersies ices savestscocsiett hiv iesesece a hence etek 4 6 11A71 User Reference Supplement Scans by ArtekMed
26. instructions about how to set the oscilloscope to perform such measurements Also installation instructions specifications description of options and details about using the 11301A and 11302A with the GPIB and RS 232 C interfaces are included here e The 11401 and 11402 User Reference Manual contains detailed information about measurements the instruments can make and instructions about how to set the oscilloscope to perform such measurements Also installation instructions specifications description of options and details about using the 11401 and 11402 with the GPIB and RS 232 C interfaces are included here e The 11301 and 11302 Pocket Reference is a short form reference The Pocket Reference gives menus and a brief description of functions selected External interface commands are listed with their basic syntax and a list of error and warning messages is included or The 11301A and 11302A Pocket Reference is a short form reference The Pocket Reference gives menus and a brief description of functions selected External interface commands are listed with their basic syntax and a list of error and warning messages is included e The 11A71 Service Manual includes information needed to check and adjust perform diagnostic troubleshooting repair and otherwise service your instrument e The 11A71 Functional Test Procedure manual verifies that the instrument is functioning properly 11A71 User Reference Supplement B 1 Scans
27. mpartment channel will cause that channel to be displayed unless doing so would exceed the maximum number or traces Unlike the 11A71 display on off button pressing the probe ID button a second time will not remove the display Probe ID button presses for displayed channels will do two things a select the trace s using this channel and b momentarily brighten all traces using this channel 11A71 User Reference Supplement 2 5 Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes 2 Stored settings can be sequentially recalled Pressing the probe ID button can cause a sequential recall of stored settings The stored settings feature must be enabled using the Probe ID Utility menu Settings must be stored as explained under STORE RECALL Major Menu in the 11301 and 11302 User Reference Manual or the 11301A and 11302A User Reference Manual 3 The mainframe can Autoset to accommodate the input signal introduced by the probe The Autoset feature can be enabled or disabled using the Probe ID Utility menu Autoset is the automatic setup of vertical deflection factor triggering and sweep speed to produce a meaningful display e g two to five divisions of vertical deflection and two to five repetitions of the input signal For more information refer to Autoset in the 11301 and 11302 User Reference Manual or the 11301A and 11302A User Reference Manual 4 The mainframe can automatically measure the selected trace Aut
28. nframes DC Circuit Loading AC coupling capacitors are connected differently in the 11A52 and 11A71 than in the 11A32 and 11A34 Figure 2 1 shows this difference C 11A52 11A71 50 11A32 11A34 Figure 2 1 Location of AC coupling capacitors in plug in amplifiers C5922 203 In the 11452 and 11A71 the coupling capacitor isolates both the input termination and the amplifier from external DC voltages Avoid inadvertently selecting DC Coupling if your circuit will be damaged by the resulting 50 Q termination to ground See Caution below The coupling capacitor in the 11A32 and 11A34 does not isolate the input termination from external DC voltages When AC Coupling is selected the 11A52 coupling capacitor allows the user to test low impedance circuits that are elevated in potential by up to 100 volts DC without loading the circuit at DC Passive attenuating probes such as the P6056 or P6057 eliminate the DC loading and lower the low frequency 3 dB point In the Off coupling mode the AC coupling capacitor precharges in about three seconds to the average DC voltage of the circuit being tested Always use the Off mode when connecting the 11A52 input to a circuit that may have more than 25 volts the 11A52 peak input voltage rating present This will precharge the coupling capacitor Wait a few seconds before selecting AC coupling The coupling capacitor is discharged upon removal of the external circuit 11A71 User Referenc
29. nnel oscilloscope 2 4 11A71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes 50 Q Overload When the input voltage substantially exceeds 5 Vrms the 11A71 will sense the overload and disconnect the 50 Q input termination The mainframe will display the message Input channel 1 overload on LEFT CENTER RIGHT plug in To reconnect the 50 Q input termination first correct the overload condition then select AC or DC from the Coupling menu Active Probes Using an active probe such as the P6231 eliminates the possibility of AC Coupling Coupling options available when using such a probe are Off and DC Probe ID The Probe ID section of the Utility Menu is the means of selecting how any 11300 series oscilloscope responds to an ID button push of recommended probes All or some combination of the following operations may be set to start in response to probe ID buttons To display the Utility Menu press the front panel UTILITY button once on 11301 or 11302 oscilloscopes twice on 11301A or 11302A oscilloscopes For details see the Probe ID section of the Waveform Acquisition subsection in the mainframe User Reference manual Pressing the probe ID button can initiate one or more of the following operations 1 Present a new display or if that channel is already displayed select the existing trace Pressing the ID button of a probe connected to an undisplayed left or center co
30. omatic measurements of the selected trace can be initiated by pressing a probe ID button The Automatic Measurements feature can be enabled or disabled using the Probe ID Utility menu Such measurements are peak to peak maximum middle and minimum voltages frequency period pulse width and duty cycle For full information about automatic measurements see Measure in the 11301 and 11302 User Reference Manual or the 11301A and 11302A User Reference Manual 5 An interrupt to the GPIB and RS 232 C can be generated Pressing a probe ID button will cause the mainframe to produce an SRQ to the GPIB and RS 232 C For more information refer to the GPIB RS 232 C section of the 11301 and 11302 User Reference Manual or the 11301A and 11302A User Reference Manual Front Panel Error Messages 2 6 Message Cause Message Cause Internal DAC overflow on channel 1 of LEFT CENTER or RIGHT plug in unit Some plug in unit detected that a requested setting overflowed an internal DAC Such overflow usually indicates defective hardware In this situation the plug in unit sets the DAC to the limit nearer the requested setting Bad Level 2 probe checksum on channel 1 of LEFT CENTER or RIGHT plug in unit Some plug in unit detected that a Level 2 TEKPROBE had failed or been improperly connected 11A71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11300 series mainframes GPIB and RS 232 C Commands
31. onship but there is no way for signals unrelated to the trigger to be corrected with this deskewing technique High frequency rejection of signals unrelated to the trigger is not improved by deskewing The solution to both problems is to invoke averaging The averaging process suppresses all signals and noise unrelated to the trigger 3 4 11A71 User Reference Supplement Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes 50 Q Overload When the input voltage substantially exceeds 5 Vrms the 11A71 will sense the overload and disconnect the 50 Q input termination The mainframe will display the message Input channel 1 overload on LEFT CENTER RIGHT plug in To reconnect the 50 Q input termination first correct the overload condition then select AC or DC from the Coupling menu Active Probes Probe ID Using an active probe such as the P6231 eliminates the possibility of AC Coupling Coupling options available when using such a probe are Off and DC The Probe ID function is the means of selecting how the 11401 or 11402 responds to an ID button push of recommended probes The Probe ID Function is part of the Probes pop up menu which is selected from the Utilities major menu All or some combination of the following operations may be set to start in response to probe ID buttons To display the Utility major menu press the front panel UTILITY button For details see the Probe Calibration and ID Function
32. ry much If you received this from a well meaning friend for free we would appreciate your treating this much like you would share ware By that we mean a donation of at least 5 10 per manual is appreciated in recognition of the time a manual can take as much as 40 hours to reproduce book link etc energy and quality of effort that went into preserving this manual Donations via PayPal go to manuals artekmedia com or can be mailed to us the address above Thanks Dave amp Lynn Henderson Artek Media INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert tag or stamped on the chassis The first number or letter designates the country of manufacture The last five digits of the serial number are assigned sequen tially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufacture is identified as follows B000000 Tektronix inc Beaverton Oregon USA 100000 Tektronix Guernsey Ltd Channel islands 200000 Tektronix United Kingdom Ltd London 300000 Sony Tektronix Japan 700000 Tektronix Holland NV Heerenveen The Netherlands Copyright Tektronix Inc 1987 1988 All rights reserved Tektronix products are covered by U S and foreign patents issued and pending TEKTRONIX INC SCOPEMOBILE and are registered trademarks Printed in U S A Scans by ArtekMedia 2006 11A71 Features and Functions Features e Up to 1000
33. seesoreeerenesseease Section 2 Operating the 11A71 in 11300 series Mainframes Display On Off seins ccc civescesicnssusetasndvanecdepwest E e EE Selecting Co pling sikarinsa nedirita rav ia E ime Other Punch Ons usune AEE TNES Positonand Offsets sriseinii ss teens uNe Easa tenses Eaa S EEEN EE DCC ircu sa AUN assisa a E a Adding Waveforms ssscscsssssssssssnsesssncsessssnsesessnsssasasesnsosacaccoensssssseasesososaseseess TO Overload erisia a E E Ei Front Panel Error MeSsages rerscssscsscesesesesssrssreneeacssrssssacsacassesssecerseses GPIB and RS 232 C Commands and Syntax seseseseresesssesnsesesesesssesneeenreere Section 3 Operating the 11A71 in 11400 series Mainframes Display On Obl eens E Oher Piri HONS ed as Sos a E E S V rncal Offsetozs ara E E DC Circuit LOadinp sas casts asc ec aenea E E E Adding and Subtracting Waveforms se sesesesesressssseerereeneoressssssasesesseseseatennesne 50 OC Overload sansan i E Pront Panel Error Messages ipne ensa iaaiiai eieae GPIB and RS 232 C Commands and Syntax ssesseessesersesesnressnssssesserereevsonsses Section 4 Specification Performance Conditions siissasevacistcesencssvesseiniwase oinaeeeedeseaesedtesebsevoocsanenncs tive Electrical Characteristics conoesoesosorsosrorerorssorosososososssssonsranseoee Environmental Characteristics cccccccccccccsccesrsersecenceesassceensssseces Physical Characterist iSi ieia Recommended Probe w
34. specifications are valid at an ambient temperature of 0 to 50 C unless otherwise stated TABLE 41 Electrical Characteristics Characteristic Performance Requirement Calibrated Range 10 mV to 1 V div in seven steps ina 1 2 5 sequence Enhanced DC Accuracy of 11A71 in 11300 series Mainframes with on screen cursors readings with Position set to 0 00 AV DC Ace DC Balance 0 9 0 05 div 0 2 div With P6231 Probe calibrated from 11300 series Calibrator output Volts Div AV DC Acc DC Balance DC Offset Acc 1 For absolute DC accuracy of single point measurements using Offset and the DC Offset Accuracy DC Balance and AV DC Accuracy terms Apply the AV DC Accuracy only to the difference between the Vertical Position setting and the measurement point Without Probes Volts Div DC Offset Acc 10mV to1V 0 4 0 01 mV Scans by ArtekMedia 2006 Specification Circuit Display Deflection Factor Sensitivity Cont Display Offset Display Frequency Response 4 2 TABLE 4 1 cont Electrical Characteristics Characteristic Performance Requirement Enhanced DC Accuracy of 11A71 in 11401 11402 Mainframes AV DC Ace DC Balance With P6231 Probe calibrated from 11401 11402 Calibrator output AV DC Ace DC Balance wr Coarse Resolution 1 2 5 sequence Without Probes Volts Div DC Offset Acc 10 mV to1 V 0 20 0 01 div
35. ssing the 11A71 display on off button Offset Vertical Position Under Waveform Control in Section 2 Operating Information 11A71 User Reference Supplement 3 1 Scans by ArtekMedia 2006 Operating the 11A71 in 11400 series Mainframes Vertical Offset The 11401 and 11402 oscilloscopes use offset to position the trace on the screen In YT signal vs time mode offset determines vertical position but when a plug in unit provides the X component of an XY display offset controls horizontal position Offset is an input signal related control and its units are those of the input signal usually 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 screen Control of offset is then assigned to the Lower Control knob In the 11401 and 11402 changing the vertical deflection factor magnifies or compresses the displayed signal about screen center Therefore to examine a portion of the input signal in greater detail use Vert Offset the Lower Control knob to position the area of interest to screen center Next use the Vert Size the Upper Control knob to adjust the display to the size needed for detailed examination DC Circuit Loading AC coupling capacitors are connected differently in the 11A52 and 11A71 than in the 11A32 and 11A34 Figure 3 1 shows this difference In the 11A52 and 11A71 the coupling capacitor isolates both t
36. tion 1T Overdrive A condition in which amplifiers are driven into a non linear operating range Typically many divisions off screen Overload The condition existing when a potentially damaging voltage is applied to the input connector Toggle To switch alternately between two functions e g on and off 11A71 User Reference Supplement A 1 Scans by ArtekMedia 2006 Appendix B Instrument Documentation o Introducing the 11301 and 11302 Programmable Oscilloscopes This book helps the new user learn the concepts and operation of the 11301 and 11302 programmable oscilloscopes or Introducing the 11301A and 11302A Counter Timer Oscilloscopes This book helps the new user learn the concepts and operation of the 11301A and 11302A counter timer oscilloscopes e Introducing the 11401 and 11402 Digitizing Oscilloscopes Intended for new users this book explains the concepts and operation of the 11401 and 11402 digitizing oscilloscopes e The 11301 and 11302 User Reference Manual contains detailed information about measurements the instruments can make and instructions about how to set the oscilloscope to perform such measurements Also installation instructions specifications description of options and details about using the 11301 and 11302 with the GPIB and RS 232 C interfaces are included here or The 11301A and 11302A User Reference Manual contains detailed information about measurements the instruments can make and
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