7B50A: Difference between revisions
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{{Plugin Sidebar | |||
|manufacturer=Tektronix | |||
|type=7B50A | |||
|summary=100 MHz timebase | |||
|image=Tek 7b50a.jpg | |||
|caption=7B50A front | |||
|introduced=1976 | |||
|discontinued=1988 | |||
|series=7000-series scopes | |||
|designers=Les Larson;Bruce Hofer;Paul Farley;Art Metz; | |||
|manuals= | |||
* [[Media:070-1986-00.pdf|Tektronix 7B50A Manual]] (OCR) | |||
}} | |||
The '''Tektronix 7B50A''' is a redesign of the 100 MHz [[7B50]] timebase plug-in for [[7000-series scopes]], [[introduced in 1976]]. | |||
[[Category: | [https://vintagetek.org/years-at-tektronix-hofer/ According to Bruce Hofer], | ||
<blockquote> | |||
The 7B50A was nothing more than a [[7B80]] with its fastest calibrated sweep rate limited to 5 ns/div via a modified cam-switch that locked out the two fastest settings. | |||
</blockquote> | |||
{{BeginSpecs}} | |||
{{Spec | Sweep | 50 ns/Div to 5 s/Div (1–2–5), ×10 magnifier (down to 5 ns/Div), variable sweep (up to ×2.5) and holdoff (up to ×2 sweep lengths at 20 ms/Div and faster)}} | |||
{{Spec | Excluded sweep | First 10 ns in 78xx, 79xx; First 20 ns in 77xx; First 50 ns in other mainframes }} | |||
{{Spec | Trigger | 50 mV or 0.3 Div up to 50 MHz, 250 mV or 1.5 Div up to 150 MHz; AC >30 Hz, LF REJ >30 kHz, HF REJ <50 kHz }} | |||
{{Spec | Jitter | <500 ps at 150 MHz }} | |||
{{Spec | Ext. Trigger | Max. 250 V DC+peak AC, 1 MΩ // 20 pF }} | |||
{{Spec | Sweep/Trigger Modes | Peak-Peak Auto, Auto, Norm, Single Sweep}} | |||
{{EndSpecs}} | |||
==X-Y operation== | |||
In the 7B50A, like in the 7B80, X-Y mode was an option (Opt.2). | |||
==Pictures== | |||
<gallery> | |||
Tek 7b50a.jpg | 7B50A | |||
Tek 7b50a front2.jpg | 7B50A Opt.2 (X-Y) | |||
7B50A RHS.jpg | RHS | |||
7B50A opt 2 LHS.jpg | LHS with opt 2 | |||
Tek 7b50a bottom2.jpg | 7B50A bottom | |||
Tek 7b50a rear2.jpg | 7B50A rear | |||
Tek 7b50a top2.jpg | 7B50A Opt.2 top | |||
Tek 7a17 7a18 7b50a model3 cart.jpg | |||
</gallery> | |||
==Components== | |||
{{Parts|7B50A}} | |||
[[Category:7000 series horizontal plugins]] | |||
Latest revision as of 07:39, 5 August 2023
The Tektronix 7B50A is a redesign of the 100 MHz 7B50 timebase plug-in for 7000-series scopes, introduced in 1976.
The 7B50A was nothing more than a 7B80 with its fastest calibrated sweep rate limited to 5 ns/div via a modified cam-switch that locked out the two fastest settings.
Key Specifications
| Sweep | 50 ns/Div to 5 s/Div (1–2–5), ×10 magnifier (down to 5 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 150 MHz; AC >30 Hz, LF REJ >30 kHz, HF REJ <50 kHz |
| Jitter | <500 ps at 150 MHz |
| Ext. Trigger | Max. 250 V DC+peak AC, 1 MΩ // 20 pF |
| Sweep/Trigger Modes | Peak-Peak Auto, Auto, Norm, Single Sweep |
X-Y operation
In the 7B50A, like in the 7B80, X-Y mode was an option (Opt.2).
Pictures
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7B50A
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7B50A Opt.2 (X-Y)
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RHS
-
LHS with opt 2
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7B50A bottom
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7B50A rear
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7B50A Opt.2 top
-
Components
Some Parts Used in the 7B50A
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 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 |