7B80: Difference between revisions
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Option 2 adds support for X-Y mode via a "Display mode" switch (pictured). | Option 2 adds support for X-Y mode via a "Display mode" switch (pictured). | ||
When X-Y mode is selected, the X-axis signal is taken from the internal trigger path, irrespective of | When X-Y mode is selected, the X-axis signal is taken from the internal trigger path, irrespective of Trigger Source, Magnification (×10), variable sweep speed, and X position controls. | ||
The companion delaying timebase for use in 4-slot mainframes is the [[7B85]]. The [[7B50A]] is essentially a 7B80 with its fastest calibrated sweep rate limited to 5 ns/div. | The companion delaying timebase for use in 4-slot mainframes is the [[7B85]]. The [[7B50A]] is essentially a 7B80 with its fastest calibrated sweep rate limited to 5 ns/div. | ||
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* [https://m.youtube.com/watch?v=Hz-gF_XSj9w Demonstration of delay and delta time measurement on a 7B85] | * [https://m.youtube.com/watch?v=Hz-gF_XSj9w Demonstration of delay and delta time measurement on a 7B85] | ||
{{Documents|Link=7B80}} | {{Documents|Link=7B80}} | ||
{{PatentLinks|7B80}} | |||
==Prices== | ==Prices== |
Latest revision as of 11:33, 19 June 2024
The Tektronix 7B80 is a 400 MHz single time base plug-in without delay function for 7000-series scopes, typically the 7800 Series, e.g. 7844. It uses the 155-0126-00 trigger amplifier followed by the 155-0109-01 trigger detector.
Option 2 adds support for X-Y mode via a "Display mode" switch (pictured). When X-Y mode is selected, the X-axis signal is taken from the internal trigger path, irrespective of Trigger Source, Magnification (×10), variable sweep speed, and X position controls.
The companion delaying timebase for use in 4-slot mainframes is the 7B85. The 7B50A is essentially a 7B80 with its fastest calibrated sweep rate limited to 5 ns/div.
From Tekscope Vol.8 No.1, 1976:
Les Larson developed the trigger circuitry and served as Project Manager for the 7B80 and 7B85. The sweeps were designed by Bruce Hofer and the DVM and related logic by Paul Farley. Much credit is due Art Metz for his work on the trigger input 1C which includes the peak-to-peak automatic trigger circuitry. Gene Andrews, Program Manager, provided overall direction for the project.
Key Specifications
Sweep | 10 ns/Div to 5 s/Div (1–2–5), ×10 magnifier (down to 1 ns/Div), variable sweep (up to ×2.5) and holdoff (up to ×2 sweep lengths at 20 ms/Div and faster) |
---|---|
Excluded sweep | First 10 ns in 78xx, 79xx; First 20 ns in 77xx; First 50 ns in other mainframes |
Trigger | 50 mV or 0.3 Div up to 50 MHz, 250 mV or 1.5 Div up to 400 MHz; AC >30 Hz, LF REJ >30 kHz, HF REJ <50 kHz |
Jitter | <100 ps at 400 MHz |
Ext. Trigger | Max. 250 V DC+peak AC, 1 MΩ // 20 pF |
Sweep/Trigger Modes | Peak-Peak Auto, Auto, Norm, Single Sweep |
Links
- Zenwizard Studios - Tektronix 7B80 Lab Check in and Calibration
- Demonstration of delay and delta time measurement on a 7B85
Documents Referencing 7B80
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Tekscope 1976 V8 N1.pdf | Article | Delta Time Measurement for the 7000 Series | Paul Farley • Les Larson • Bruce Hofer | 1976 | 7B85 • 7B80 • DM40 • DM43 |
Technology Report October 1979.pdf | Article | Patent Received: 4,109,182 Simultaneous Delayed Sweep Display | Oliver Dalton | 1979 | Patent US 4109182A • 7B80 • 7B85 • 7B10 • 7B15 |
Patents that may apply to 7B80
Page | Title | Inventors | Filing date | Grant date | Links |
---|---|---|---|---|---|
Patent US 3562464A | Cam actuated switch having movable and fixed contacts on circuit board | Howard Vollum • Willem H Verhoef • Tony Sprando | 1968-10-07 | 1971-02-09 | Cam switches • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AM503 |
Patent US 4013855A | Modular pushbutton switch | John E. Reichen • Richard Neff Meyer • Gary W. Reed | 1975-03-17 | 1977-03-22 | CP501 • 7B10 • 7B15 • 7B50A • 7B80 • 7B85 • 7B87 |
Patent US 4109182A | Delayed sweep system for an oscilloscope | Oliver Dalton | 1976-03-10 | 1978-08-22 | 7B80 • 7B85 • 7B10 • 7B15 |
Prices
Year | 1977 | 1980 | 1984 | 1987 | 1990 |
---|---|---|---|---|---|
Catalog Price | $745 | $1,000 | $1,485 | $1,660 | $2,080 |
In 2023 Dollars | $3,800 | $3,700 | $4,400 | $4,500 | $4,900 |
Pictures
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Front (with Opt.2 X-Y mode switch)
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7B80 Opt.2, left side
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7B80 Opt.2, left side, X-Y switch board removed
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7B80 Opt.2, X-Y switch board, top
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7B80 Opt.2, X-Y switch board, bottom
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7B80, right side
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Right front
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Right rear
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Left front
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Left rear
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Top
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Rear
Modifications
The 7B80MODWJ is a 7B80 timebase having various controls removed:
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7B80MODWJ Front view
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7B80MODWJ Top view
Components
Some Parts Used in the 7B80
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
155-0049-00 | 155-0049-00 • 155-0049-01 • 155-0049-02 | Monolithic integrated circuit | sweep control with lockout | 335 • 464 • 465 • 466 • 475 • 475A • 475M • 485 • 5B31 • 5B40 • 5B52 • 5B42 • 5B44 • 7B53A • 7B80 • 7B85 • 7B87 • 7B92A • 7B90P • 7B10 • 7B15 • SC502 • 7B42N • AN/USM-281C • 067-0657-00 |
155-0109-00 | 155-0109-00 • 155-0109-01 | Monolithic integrated circuit | trigger | 5B25N • 5B31 • 5B40 • 5B42 • 5B44 • 5S14N • 7B50A • 7B53A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P • 7S14 • 7612D • SC502 • SC503 • SC504 |
155-0126-00 | 155-0126-00 | Monolithic integrated circuit | trigger source selector and P-P auto amplifier | 7B50A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P |
2N5454 | 151-1042-00 | Discrete component | dual n-channel JFET | 7B80 • 7B53A • 2213 • 2215 • 2235 • T912 • T921 • T922 • T932 • T935 |