7B50A
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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
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LHS with opt 2
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7B50A bottom
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7B50A rear
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7B50A Opt.2 top
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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 |