Tektronix 2440 Service Manual Download | Manualshive

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Summary of Contents for 2440

Page 1: ...SONAL INJURY DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO REFER TO OPERATORS SAFETY SUMMARY AND SERVICE SAFETY SUM MARY PRIOR TO PERFORMING ANY SERVICE Please Check for CHANGE INFORMATION at the Rear of This Manual First Printing JUL 1988 Revised JUN 1989 Tfektronix COMMITTED TO EXCELLENCE ...

Page 2: ...rved 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 sequentially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufacture is identified as follows BOO...

Page 3: ...ETAILED CIRCUIT DESCRIPTION 3 15 SYSTEM PROCESSOR 3 15 WAVEFORM PROCESSOR SYSTEM 3 22 Page FRONT PANEL PROCESSOR 3 28 FRONT PANEL CONTROLS 3 30 SYSTEM DAC AND ACQUISITION CONTROL REGISTERS 3 31 SYSTEM DAC cont AND AUXILIARY FRONT PANEL 3 33 SYSTEM CLOCKS 3 35 TIME BASE CONTROLLER AND ACQUISITION MEMORY 3 39 ATTENUATORS AND PREAMPLIFIERS 3 43 PEAK DETECTORS AND CCD CLOCK DRIVERS 3 45 TRIGGERS AND P...

Page 4: ...TING 6 7 INTRODUCTION 6 7 TROUBLESHOOTING AIDS 6 7 TROUBLESHOOTING EQUIPMENT 6 9 TROUBLESHOOTING TECHNIQUES 6 9 CORRECTIVE MAINTENANCE 6 11 INTRODUCTION 6 11 MAINTENANCE PRECAUTIONS 6 11 OBTAINING REPLACEMENT PARTS 6 11 MAINTENANCE AIDS 6 12 INTERCONNECTIONS 6 12 TRANSISTORS AND INTEGRATED CIRCUITS 6 12 SOLDERING TECHNIQUES 6 14 REMOVAL AND REPLACEMENT PROCEDURE 6 15 Section 7 OPTIONS AND ACCESSOR...

Page 5: ...ay 5 Vertical and Horizontal Gain Offset and Vector Compensation adjustment pattern 5 5 5 3 Display 6 Integrator Time adjustment pattern 5 6 5 4 SN B010250 Above CH 1 and CH 2 CCD Clock Adjustments shown centered as after doing part b 5 7 5 4 SN B010249 Below CH 1 and CH 2 CCD Clock Adjustments shown centered as after doing part b 5 8 5 5 CCD counts display and CM adjustment menu 5 8 5 6 CCD sides...

Page 6: ...olate mode Color codes for resistors and capacitors Semiconductor lead configurations Locating components on schematic diagrams and circuit board illustrations Detailed 2440 Block Diagram Detailed 2440 Block Diagram cont A12 Processor Board A13 Side Board A14 Front Panel Board A10 Main Board A30 A31 A32 and A33 Gain Cell Boards A1 1 Timebase Display Board A17 High Voltage Board A16 Low Voltage Pow...

Page 7: ...oldoff Delay Range for Current Source vs Charging Capacitor Combinations 3 8 Side Board Address Decoding 3 20 3 21 3 22 3 27 3 52 3 55 3 59 3 60 4 1 Test Equipment Required 4 2 Accuracy Limits CH 1 and CH 2 CURSOR VOLTS Readout and A and B TRIGGER LEVEL Readouts 4 3 Minimum Display Level for CH 1 or CH 2 Triggering 4_4 Minimum Signal Level for EXT1 or EXT2 Triggering 6 1 Relative Susceptibility to...

Page 8: ... the protective ground connection all accessi ble conductive parts including knobs and controls that may appear to be insulated can render an electric shock Symbols in This Manual This symbol indicates where applicable cau tionary or other information is to be found For maximum input voltage see Table 1 1 Use the Proper Power Cord Use only the power cord and connector specified for the instrument ...

Page 9: ...gerous voltages exist at several points in this product To avoid personal injury do not touch exposed connec tions or components while power is on Disconnect power before removing protective panels sol dering or replacing components Power Source This product is intended to operate from a power source that does not apply more than 250 volts rms bwetween the supply conductors or between either suppl...

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Page 11: ... system operating modes and auxiliary functions are described in Section 5 Controls Connectors and Indicators of the Operators manual included with this instrument and the Getting Acquainted procedure in Section 1 of that manual fami liarizes the user with menu operation VERTICAL SYSTEM The two vertical channels have calibrated deflection factors from 2 mV to 5 V per division in a 1 2 5 sequence o...

Page 12: ...n all called up VERTICAL MODES Since an acquisition depends on the acquisition mode in effect many of the scope operating features are altered in SINGLE SEQ A complete description of this mode is discussed in Controls Connectors and Indicators in Section 5 of the Operators manual The user has a choice of trigger points within the acquired waveform record by selecting the amount of pre trigger data...

Page 13: ...e source and destination of waveforms to be saved may be user designated Assignment can be made to save either chan nel 1 or channel 2 or the results of an addition or multipli cation of the two channels to any REF memory or to move a stored reference from one REF memory to another Reference waveforms may also be written into a REF memory location via the GPIB interface The scope is fully controll...

Page 14: ...onix Field Office period of at least 20 minutes and is operating at an ambient temperature between 15 C and 55 C unless otherwise noted Items listed in the Performance Requirements column are verifiable qualitative or quantitative limits that define the measurement capabilities of the instrument Environmental characteristics are given in Table 1 2 The scope meets the environmental requirements of ...

Page 15: ...steps 2 mV per division to 5 V per division Accuracy Normal and Average Modes Within 2 1 DL at any VOLTS DIV setting for a signal 1 kHz or less contained within 75 DL 3 divisions of center when a SELF CAL has been performed within 15 C of the operating temperature Measured on a four or five division signal with VOLTS or V T cursors UNITS set to delta volts Envelope Mode Add 1 to Normal Mode specif...

Page 16: ...mination not checked with probe in manual Dc to 300 MHz Upper Bandwidth Limit reduced by 2 5 MHz for each C above 30 G a Envelope Mode at SEC DIV settings of 0 5 fis or slower Dc to 150 MHz using standard accessory probe internal 50 ft termination or external 50 S2 termination on 1 Mfi input a 4 7 dB Bandwidth Normal or Average Mode Envelope Mode at SEC DIV settings of 0 2 is or faster 30 C to 55 ...

Page 17: ...r greater at 300 MHz for VOLT DIV settings from 20 mV DIV to 500 mV DIV 25 1 or greater at 300 MHz for VOLT DIV settings of 5 mV DIV and 10 mV DIV Acquired Channel 2 Signal Delay with Respect to Channel 1 Signal at Full Bandwidth 250 ps a Input R and C 1 MO Resistance 1 MO 0 5 a In each attenuator the input resistance of all VOLTS DIV positions is matched to within 0 5 a Capacitance 15 pF 2 pF a I...

Page 18: ...ivision with INVERT off when Self Cal has been done within 5 C of the operatina temperature a Gain Match between NORMAL and SAVE 3 DLs for positions within 5 divisions from center Low Frequency Linearity Normal or Average Mode 3 DLs or less compression or expansion of a two division center screen signal when positioned anywhere within the acquisition window 20 MHz Bandwidth Limiter 3 dB Bandwidth ...

Page 19: ...ations by two Minimum P P Signal Amplitude for Stable Triggering3 from EXT TRIG 1 or EXT TRIG 2 Source A Trigger EXT Gain 1 DC Coupled 17 5 mV from DC to 50 MHz increasing to 50 mV at 300 MHz NOISE REJ Coupled 60 mV or less from DC to 50 MHz increasing to 150 mV at 300 MHz AC Coupled 17 5 mV from 60 Hz to 50 MHz increasing to 50 mV at 300 MHz Attenuates signals below 60 Hz HF REJ Coupled 25 mV fro...

Page 20: ...a Maximum input Voltage 400 V dc peak ac 800 V p p ac at 10 kHz or less LEVEL Control Range Channel 1 or Channel 2 Source 1 8 divisions x VOLTS DIV setting EXT TRIG 1 or EXT TRIG 2 Source EXT GAIN 1 0 9 volt EXT GAIN r 5 4 5 volts 3 LEVEL Readout Accuracy for triggering signals with transition times greater than 20 ns Channel 1 or Channel 2 Source DC Coupled 15 C to 35 C Within 3 of setting 3 of p...

Page 21: ...d Within 3 of setting 4 of p p signal 1 0 mV 0 5 mV X probe attenuation factor NOISE REJ Coupled Add 30 mV to DC Coupled specifications EXT GAIN 5 DC Coupled Within 3 of setting 4 of p p signal 50 mv 0 5 mV X probe attenuation factor NOISE REJ Coupled Add 150 mV to DC Coupled specifications aria hip A Trinnnr Holdoff A SEC DIV0 MIN HOa MAX HOa 2 ns 5 ns 10 ns 20 ns 2 4 fis 9 15 as 50 ns 100 ns 200...

Page 22: ...ms 200 ms 1 2 s 2 4 s 9 15 s 500 ms 1 s 2s 5 s 5 10 s SLOPE Selection Conforms to trigger source and ac power source waveforms Trigger Position Jitter P P Checked in NORMAL ACQUIRE mode with a 5 division step having less than or equal to 1 ns rise time A Mode B Mode TRIG AFTER SEC DIV 100 ns and slower 0 04 x SEC DIV setting3 13 SEC DIV 50 ns and faster 0 04 x SEC DIV setting 200 psa b B Mode RUNS...

Page 23: ...ns at 100 MHz 3 0 divisions at 100 MHz in ADD mode Attenuates sig nals below 60 Hz a HF REJ Coupled 1 0 division from DC to 30 kHz Attenuates signals above 30 kHz a LF REJ Coupled 1 0 division from 80 kHz to 50 MHz increasing to 2 0 divisions at 100 MHz 3 0 divisions at 100 MHz in ADD mode Attenuates sig nals below 80 kHz 3 EXT TRIG 1 or EXT TRIG 2 Source Ext Gain 1 DC Coupled 35 mV from DC to 50 ...

Page 24: ...DIV 50 ns and faster REPET ON 16 ns to 1 05 ms a REPET OFF 8 ns to 524 s 3 SEC DIV 50 is to 100 ns 0 08 x B SEC DIV to 65 536 x 0 08 x B SEC DjY a SEC DIV 1 00 fts and slower 0 04 x B SEC dIV to 65 536 x 0 04 x B SEC DIV1 a Delay Time Resolution i B RUNS AFTER DELAY SEC DIV 50 and faster v 0 08 x B SEC DIV a SEC DIV 100 txs and slower 0 04 x B SEC DIV a B TRIGGERABLE AFTER DELAY SEC DIV 50 ns and ...

Page 25: ...of lithium batteries Improper handling may cause fire explosion or severe burns Don t recharge crush disassemble heat the battery above 212 F 100 C incinerate or expose contents of the battery to water Dispose of battery in accordance with local state and national regulations Typically small quantities less than 20 can be safely disposed of with ordinary garbage in a sanitary landfill Larger quant...

Page 26: ... short circuit load with 8 mA 1 5 3 A SEC DIV switch set to 1 ms Repetition Period A SEC DIV Calibrator Calibrator Div Setting3 Frequency3 Period3 Cycle3 2 ns 100 5 ns 40 10 ns 20 20 ns 5 MHz 200 ns 10 50 ns 4 100 ns 2 200 ns 1 500 ns 2 1 flS 1 MHz 1 flS 1 2 fis 0 5 5 fis 4 10 s 50 kHz 20 iS 2 20 fis 1 50 fis 4 100 fis 5 kHz 200 us 2 200 s 1 500 fis 4 1 ms 500 Hz 2 ms 2 2 ms 1 5 ms 4 10 ms 2 20 ms...

Page 27: ...t Voltage LO Load of 4 mA or Less l 0 5 V or less 50 0 Load to Ground 0 15 V or less 3 SEQUENCE OUT STEP COMPLETE Outputs Loqic Polarity Negative true HI to LO transition indicates the event occurred Output Voltage HI Load of 400 fiA or less 2 5 V to 3 5 V a 50 Q Load to Ground 0 45 V or greater 3 Output Voltage LO Load of 4 mA or less 0 5 V or less 3 50 0 Load to Ground 0 15 V or less 3 SEQUENCE ...

Page 28: ...nter screen a Vector Response NORMAL Mode Step Aberration 1 4 4 4 p p Fill Edges of filled regions match reference lines within 0 1 division ENVELOPE Mode Fill Less than 1 change in p p amplitude of a 6 division filled ENVELOPE waveform when switchinq vectors ON and OFF Waveform and Cursor Display Horizontal Resolution Electrical One part in 1024 10 bit Calibrated for 100 DOints per division a Gai...

Page 29: ...ypical standard instrument 160 watts 250 VA a Maximum fully optioned instrument 200 watts 300 VA a Primary Grounding0 Type test 0 1 ft maximum Routine test to check grounding con tinuity between chassis ground and protective earth ground 3 Performance Requirement not checked in the manual c Routine test is with ROD L EPA Electronic Model 100AV Hi Pot Tester This tests both the Primary Circuit Diel...

Page 30: ... of 0 025 inch 0 64 mm p p 4 g at 55 Hz with frequency varied from 10 Hz to 55 Hz in one minute sweeps Hold 10 minutes at each major resonance or if none exist hold 10 minutes at 55 Hz 75 minutes total test time Shock Operating and Nonoperating 50 g half sine 11 ms duration three shocks on each face for a total of 1 8 shocks Transit Drop not in shipping package 12 inch 300 mm drop on each corner a...

Page 31: ...ackmounted instrument meets or exceeds the requirements of MIL T 28800C with respect to Type 111 Class 5 Style D equipment with the rackmounting rear support kit installed Refer to the Standard Instrument Environmental Specification for the remaining performance requirements Instruments will be capable of meeting or exceeding the requirements of Tektronix Standard 062 2853 00 class 5 Temperature o...

Page 32: ...0 in Depth With Front Cover 479 mm 18 86 in With Handle Extended 550 mm 21 65 in Cooling Forced air circulation no air filter Finish Tektronix Blue vinyl clad material on aluminum cabinet Construction Aluminum alJoy plastic composite chassis spot molded Plastic laminate front panel Glass laminate circuit boards RACKMOUNTING Rackmounting Conversion Kit Weight 4 0 kg 8 8 lbs Domestic Shipping Weight...

Page 33: ... Wave Flatness Field Rate 5 mV div to 20 mV div 1 1 p p at 60 Hz with input signal of 0 1 V 50 mV div 1 1 p p at 60 Hz with input signal of 1 0 V With fast rise step rise time 1 ns or less 1 MO dc input coupling an external 50 0 termination and VARIABLE VOLTS DIV set to CAL Exclude the first 20 ns following the step transition and exclude the first 30 ns when 20 MHz BW LIMIT is set Line Rate 5 mV ...

Page 34: ...ons Composite Sync 0 6 divisions Peak signal amplitude within 18 divisions of input around reference EXT TRIG 1 or EXT TRIG 2 EXT GAIN 1 Composite Video 60 mV Composite Sync 30 mV Peak signal amplitude within 0 9 V from input around reference EXT GAIN 5 Composite Video 300 mV Composite Sync 150 mV Peak signal amplitude within 4 9 V from input around referenrp a Performance Requirement not checked ...

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Page 37: ...y be damaged if operated with the LINE VOLTAGE SELECTOR switch set for the wrong applied ac input source voltage or if the wrong line fuse is installed LINE VOLTAGE SELECTION The scope operates from either a 115 V or 230 V nominal ac power input source having a line frequency ranging from 48 Hz to 440 Hz Before connecting the power cord to a power input source verify that the LINE VOLTAGE SELECTOR...

Page 38: ...C 127 Option A3 Australian 240V 1 0A 230V 1 80V to 250V 5A 250V AGC 3AG Fast blow UL 198 6 AGC 3AG AS Cl 1 2 IEC 1 27 Option A4 North American 240V 15A 230V 1 80V to 250V 5A 250V AGC 3AG Fast blow UL 198 6 AGC 3AG ANSI C73 20 NEMA 6 1 5 P IEC 83 UL 198 6 Option A5 Switzerland 220V 6A 230V 1 80V to 250V 5A 250V AGC 3AG Fast blow UL 198 6 AGC 3AG SEV IEC 127 A 6A Tvpe C fuse is also insta ed the plu...

Page 39: ...ument will enter the Scope mode in the either ACQUIRE or SAVE Storage mode depending on the mode in effect when it was powered off If tests are failed the scope displays the Extended Diagnostics menu if the failure is in the range of 1000 5300 and the message HARDWARE PROBLEM SEE SERVICE MANUAL is displayed with the menu see Diagnostics in Section 6 for more information If the failure is in 1000 5...

Page 40: ...ntarily interrupted starting the power off sequence but is reestablished before the sequence completes the scope will redo the power on procedure If the scope is in the middle of a waveform acquisition when power interruption occurs the waveform data will not be saved and the invalid waveform data display will be seen when power on has completed Press ACQUIRE to restart the acquisition and obtain ...

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