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|designers=Tom Rousseau;Les Larson;Jack Collins;Ellen Deleganes;Jim Schlegel;Gary Fladstol;Val Garuts;Tim Holte;Burt Johnson;Bruce Kingsland;Wes Kosta;Jim Tallman;Kirk Wimmer
|designers=Tom Rousseau;Les Larson;Jack Collins;Ellen Deleganes;Jim Schlegel;Gary Fladstol;Val Garuts;Tim Holte;Burt Johnson;Bruce Kingsland;Wes Kosta;Jim Tallman;Kirk Wimmer
|manuals=
|manuals=
* [[Media:070-2873-00.pdf|7854 Operators Manual]]
* [[Media:070-2873-00.pdf | 7854 Operators Manual           ]]
* [[Media:070-2874-01.pdf|7854 Service Manual, Sept. 1981]] (OCR)
* [[Media:070-2874-01.pdf | 7854 Service Manual, Sept. 1981 ]]


* [[Media:Tektronix 7854 Manual Change Info D.pdf                  | 7854 Manual Change Information]] through Jan 1991
* [[Media:Tektronix 7854 Manual Change Info D.pdf                  | 7854 Manual Change Information           ]] through Jan 1991
* [[Media:Tektronix 7854 Test Point and Adjustment Locations D.pdf  | 7854 Test Points and Adjustment Locations]]
* [[Media:Tektronix 7854 Test Point and Adjustment Locations D.pdf  | 7854 Test Points and Adjustment Locations ]]
* [[Media:Tektronix 7854 Schematics D.pdf                          | 7854 Schematics]] (cleaned up)
* [[Media:Tektronix 7854 Schematics D.pdf                          | 7854 Schematics                           ]]
 
'''Application Notes'''
* [[Media:Tek_AX4864_7854_keyboard_guide.pdf            | Waveform Processing Keyboard Guide]] (OCR)
* [[Media:Tek_AX4281_7854_measurement_variety.pdf        | 7854 Measurement Variety]] (OCR)
* [[Media:Tek_AX4440_7854_onboard_digital_processing.pdf | 7854 Onboard Digital Processing]] (OCR)
* [[Media:42W-4416-1.pdf                                | Using the 7854 in a GPIB configuration]]
* [[Media:42W-5334.pdf                                  | 7854 Automated TDR testing]] (OCR)
* [[Media:42AX-4682.pdf                                  | 7854 Programming Techniques]] (OCR)
* [[Media:Tek 7854-AN-SPSBasic.pdf                      | Talking to the 7854 scope with TEK SPS BASIC]] (''[[Handshake]]'', Winter 1980/81)
* [[Media:7854 Application Programs.pdf                  | 7854 Application Programs]]
 
* [[Media:Tek_AX4382_7854_wp1310_01.pdf|WP1310 Waveform Processing System]] (OCR)
* [[Media:Tek_AX4425_7854_WP1310_02.pdf|WP1310 Signal Processing System]] (OCR)
 
* [[Media:Tek_7854_42W6767_tdr_mps_package_sm.pdf|7854TDR and 7854MPS package]] (OCR)
* [[Media:Tek_42W67321_Tekmap_7854_measurement.pdf|TekMAP 7854 Measurement Software]] (OCR)


'''Modifications'''
'''Modifications'''
* [[Media:040-1066-00.pdf|040-1066-00: Vertical Pickoff Amplifier Drift Improvement]] (1982)
* [[Media:040-1066-00.pdf | 040-1066-00: Vertical Pickoff Amplifier Drift Improvement ]] (1982)
* [[Media:045-0056-00.pdf|045-0056-00: Firmware update 1.03]] (1983)
* [[Media:045-0056-00.pdf | 045-0056-00: Firmware update 1.03                         ]] (1983)


'''Troubleshooting'''
'''Troubleshooting'''
* [[Media:070-2875-00.pdf|7854 Test Procedures using the 067-0911-00 and μP Diagnostic Test Interface Volume 1 Service]]
* [[Media:070-2875-00.pdf | 7854 Test Procedures using the 067-0911-00 & up Diagnostic Test Interface Volume 1 Service ]]
* [[Media:070-3887-00.pdf|7854 Test Procedures using the 067-0911-00 and μP Diagnostic Test Interface Volume 2 Service]]
* [[Media:070-3887-00.pdf | 7854 Test Procedures using the 067-0911-00 & up Diagnostic Test Interface Volume 2 Service ]]
* [[Media:070-2876-00.pdf|7854 Diagnostic Troubleshooting using the 067-0911-00 and μP Diagnostic Test Interface]]
* [[Media:070-2876-00.pdf | 7854 Diagnostic Troubleshooting using the 067-0911-00 & up Diagnostic Test Interface         ]]
* [[Media:070-2972-00.pdf|7854 Signature Analysis Tables using 067-0911-00]]
* [[Media:070-2972-00.pdf | 7854 Signature Analysis Tables using 067-0911-00                                             ]]
* [[Media:070-2876-00.pdf|7854 Diagnostic Troubleshooting Using 067-0911-00 & μP Diagnostic Test Interface]]
* [[Media:070-3801-00.pdf | 7854 Diagnostic Memory service manual                                                       ]]
* [[Media:070-3801-00.pdf|7854 Diagnostic Memory service manual]]


'''Other Info'''
'''Other Info'''
* [[Media:Tekniques 15Dec1980 vol4 no8 7854excerpt.pdf|7854-Related Excerpt from Tekniques Vol 4 No 8]]
* [[Media:Tekniques 15Dec1980 vol4 no8 7854excerpt.pdf       | 7854-Related Excerpt from Tekniques Vol 4 No 8                     ]]
* [[Media:Tek 7854 article garuts tallman.pdf|Article on the 7854 by Val Garuts and Jim Tallman]]
* [[Media:Tek 7854 eis signature page.pdf                   | Tektronix 7854 Engineering Instrument Specification Signature Page ]]
* [[Media:Tek 7854 eis signature page.pdf|Tektronix 7854 Engineering Instrument Specification Signature Page]] (needs OCR)
* [[Media:Tek_7854_42W5198_specs_orderinginfo.pdf           | 7854 specifications and ordering information                       ]]
* [[Media:Tek_7854_42W5198_specs_orderinginfo.pdf|7854 specifications and ordering information]] (OCR)
* [[Media:7854 source 1v02 1982 cover.pdf                   | Tektronix 7854 Source Code                                         ]]
* [[Media:7854 source 1v02 1982 cover.pdf|Tektronix 7854 Source Code]]
* [[Media:Tek 7854 wizard workshop.pdf                       | Tektronix Wizard Workshop Articles Relating to the 7854           ]]
* [[Media:Tek 7854 wizard workshop.pdf|Tektronix Wizard Workshop Articles Relating to the 7854]]
* [[Media:Tek 7854 factory analog calibration procedure.pdf | Tektronix 7854 Factory Analog Calibration Procedure               ]]
* [[Media:Tek 7854 factory analog calibration procedure.pdf|Tektronix 7854 Factory Analog Calibration Procedure]]
* [[Media:Tek 7854 factory digital calibration procedure.pdf | Tektronix 7854 Factory Digital Calibration Procedure               ]]
* [[Media:Tek 7854 factory digital calibration procedure.pdf|Tektronix 7854 Factory Digital Calibration Procedure]]
* [[Media:Tek 7854 board test procedures.pdf                 | Tektronix 7854 Board Test Procedures                               ]]
* [[Media:Tek 7854 board test procedures.pdf|Tektronix 7854 Board Test Procedures]]
* [[Media:Tek 7854 npi.pdf                                   | Tektronix 7854 New Product Introduction Review                     ]]
* [[Media:Tek 7854 npi.pdf|Tektronix 7854 New Product Introduction Review]]
* [[Media:Dennis Tillman 7104-7854 SMPS Dummy Load.pdf      | Dummy load for troubleshooting 7854 and 7104 SMPS (Dennis Tillman) ]]
}}
}}
The '''Tektronix 7854 Waveform Processing Oscilloscope''', introduced in 1980, is a 400 MHz combined analog / digital  
The '''Tektronix 7854 Waveform Processing Oscilloscope''', introduced in 1980, is a 400 MHz combined analog / digital  
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The waveform processor can be programmed using a detachable calculator-style keyboard, using postfix operators ("[[wikipedia:Reverse Polish notation|reverse Polish notation]]" like [[wikipedia:HP-35|HP calculators]]) that operate on entire waveforms, not just individual numbers.
The waveform processor can be programmed using a detachable calculator-style keyboard, using postfix operators ("[[wikipedia:Reverse Polish notation|reverse Polish notation]]" like [[wikipedia:HP-35|HP calculators]]) that operate on entire waveforms, not just individual numbers.
{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Bandwidth          | (analog) 400 MHz }}
{{Spec | Bandwidth          | (analog) 400 MHz }}
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* Option 2D: 4K Expanded memory storage for up to 40 waveforms and 2000 keystrokes
* Option 2D: 4K Expanded memory storage for up to 40 waveforms and 2000 keystrokes
}}
}}
{{Spec | Power consumption | 230 W }}
{{Spec | Weight | 42 lbs / 19 kg }}
{{EndSpecs}}
{{EndSpecs}}


==Internals==
==Documents==
The acquisition system uses what Tektronix termed a "display-oriented random sampling digitizing technique".
{{Documents|Link=7854}}
 
It simultaneously digitizes a pair of X and Y signal values at a rate of 3.5 µs/point, using sample/hold circuits based on Schottky diode bridges, and a single 10-bit successive-approximation ADC.  The Y sample value is then written into the memory location addressed by the X value, using DMA (direct memory access, i.e. bypassing the CPU).
 
The CPU in the 7854 is a [[Texas Instruments TMS9900]] 16-bit microprocessor, known from the infamous TI-99/4 home computer of the late 70s, with 32+6KByte ROM and 8KByte RAM.
 
The firmware consists of mask ROMs, an FPLA, and patch EPROMs.  These ROMs (particularly the early ones from Mostek) are a common point-of-failure. Several remedies exist, see the [[7854/Repairs|Repairs]] page.


==Prices==
==Prices==
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* [https://vintagetek.org/7854-mostek-mkb36000-rom-repairs Mostek ROM Repairs @ vintagetek.org]
* [https://vintagetek.org/7854-mostek-mkb36000-rom-repairs Mostek ROM Repairs @ vintagetek.org]
* [https://paulcarbone.com/blog/tektronix-7854/ overview of ROM repair options @ paulcarbone.com]
* [https://paulcarbone.com/blog/tektronix-7854/ overview of ROM repair options @ paulcarbone.com]
==Internals==
The acquisition system uses what Tektronix termed a "display-oriented random sampling digitizing technique".
It simultaneously digitizes a pair of X and Y signal values at a rate of 3.5 µs/point, using sample/hold circuits based on Schottky diode bridges, and a single 10-bit successive-approximation ADC.  The Y sample value is then written into the memory location addressed by the X value, using DMA (direct memory access, i.e. bypassing the CPU).
The CPU in the 7854 is a [[Texas Instruments TMS9900]] 16-bit microprocessor, known from the infamous TI-99/4 home computer of the late 70s, with 32+6KByte ROM and 8KByte RAM.
The firmware consists of mask ROMs, an FPLA, and patch EPROMs.  These ROMs (particularly the early ones from Mostek) are a common point-of-failure. Several remedies exist, see the [[7854/Repairs|Repairs]] page.


==Pictures==
==Pictures==
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|}
|}


 
==Components==
{{Parts|7854}}
{{Parts|7854}}


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