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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]] | * [[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]] | * [[Media:Tektronix 7854 Schematics D.pdf | 7854 Schematics ]] | ||
'''Modifications''' | |||
* [[Media: | * [[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: | |||
* [[Media: | '''Troubleshooting''' | ||
* [[Media: | * [[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 & up Diagnostic Test Interface Volume 2 Service ]] | |||
* [[Media:070-2876-00.pdf | 7854 Diagnostic Troubleshooting using the 067-0911-00 & up Diagnostic Test Interface ]] | |||
* [[Media: | * [[Media:070-2972-00.pdf | 7854 Signature Analysis Tables using 067-0911-00 ]] | ||
* [[Media: | * [[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 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]] | * [[Media:Tek_7854_42W5198_specs_orderinginfo.pdf | 7854 specifications and ordering information ]] | ||
* [[Media:Tek_7854_42W5198_specs_orderinginfo.pdf|7854 specifications and ordering information]] | * [[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 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 board test procedures.pdf | Tektronix 7854 Board Test Procedures ]] | |||
* [[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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Single-shot, pretrigger acquisition is possible with the special [[7B87]] time base using real-time sampling. | Single-shot, pretrigger acquisition is possible with the special [[7B87]] time base using real-time sampling. | ||
The project manager for the 7854 was [[Tom Rousseau]]. | The project manager for the 7854 was [[Tom Rousseau]]. | ||
During early development, before it was given the name "7854", the product was referred to as the "Smart Scope", | |||
and the digital processing was called the "smarts". | |||
The waveform processor can be programmed using a detachable calculator-style keyboard, using postfix operators | 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. | ||
("reverse Polish notation" like 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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* Programmable text display on screen | * Programmable text display on screen | ||
}} | }} | ||
{{Spec | Options | | |||
* Option 02: X-Y Phase Correction | |||
* Option 03: EMC Modification | |||
* Option 78: P11 Phosphor | |||
* 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}} | ||
== | ==Documents== | ||
{{Documents|Link=7854}} | |||
= | |||
==Prices== | ==Prices== | ||
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| $17,000 | | $17,000 | ||
|- | |- | ||
! In | ! In 2023 Dollars | ||
| $ | | $35,500 | ||
| $ | | $42,000 | ||
| $ | | $39,900 | ||
|} | |} | ||
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* [[067-0914-00]] Extender Board 80-Pin (used with the A27-MPU and A28-RAM Boards) | * [[067-0914-00]] Extender Board 80-Pin (used with the A27-MPU and A28-RAM Boards) | ||
* [[067-0915-00]] Extender Board 124-Pin (used with the A26-Control Logic and A29-Display Boards) | * [[067-0915-00]] Extender Board 124-Pin (used with the A26-Control Logic and A29-Display Boards) | ||
==Software== | |||
* [[Media:42W-5802.pdf|Application Note 42W-5802, BASIC Software Programs for Communicating Between the 7854 and IBM PC]], 1985 (OCR) | |||
* [[Media:Tek_7854_sw.zip|7854 software in BASIC]] | |||
* [[Media:Fftprog.zip | FFT program]] | |||
==Links== | ==Links== | ||
* ''[[Media:Handshake winter 1980 1981.pdf|Talking to the 7854 Oscilloscope with TEK SPS BASIC]]'' in ''Handshake'', Winter 1980/81 | * ''[[Media:Handshake winter 1980 1981.pdf|Talking to the 7854 Oscilloscope with TEK SPS BASIC]]'' in ''Handshake'', Winter 1980/81 | ||
* [[Media:Tek 7854 design team.pdf|Tek 7854 Design Team]] | * [[Media:Tek 7854 design team.pdf|Tek 7854 Design Team]] Note: The graduation cap on the Engineering Release cake (page 8) signifies that it is the "Smart Scope". | ||
* [https://www.curiousmarc.com/instruments/tek-7854-oscilloscope Tek 7854 @ curiousmarc] (with links to videos) | * [https://www.curiousmarc.com/instruments/tek-7854-oscilloscope Tek 7854 @ curiousmarc] (with links to videos) | ||
* [ | * [https://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7854.html Tek 7854 @ amplifier.cd] | ||
* [https://groups.io/g/TekScopes/topic/7854_roms_the_whole_story/73320555 7854 ROMs, the whole story] @ TekScopes groups.io | * [https://groups.io/g/TekScopes/topic/7854_roms_the_whole_story/73320555 7854 ROMs, the whole story] @ TekScopes groups.io | ||
* [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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7854_pattern_program.png | Program for generating Alignment Pattern | 7854_pattern_program.png | Program for generating Alignment Pattern | ||
Tek_7854_rise_time.jpg | Mainframe rise time measured with [[067-0587-02]] | Tek_7854_rise_time.jpg | Mainframe rise time measured with [[067-0587-02]] | ||
Tek_microlab_connected_7854_01.jpg|7854 diagnostics system with [[MicroLab I]] | |||
</gallery> | </gallery> | ||
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|} | |} | ||
==Components== | |||
{{ | {{Parts|7854}} | ||