7B50: Difference between revisions
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* [[Media:070-0975-00.pdf|Tektronix 7B50 Manual]] (OCR) | * [[Media:070-0975-00.pdf|Tektronix 7B50 Manual]] (OCR) | ||
'''7B50A''' | '''7B50A''' | ||
* [[Media:070-1986-00.pdf|Tektronix 7B50A Manual]] | * [[Media:070-1986-00.pdf|Tektronix 7B50A Manual]] (OCR) | ||
}} | }} | ||
The '''Tektronix 7B50''' is a timebase plug-in for [[7000-series scopes]], particularly the 7500 series, [[introduced in 1969]]. | The '''Tektronix 7B50''' is a timebase plug-in for [[7000-series scopes]], particularly the 7500 series, [[introduced in 1969]]. | ||
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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 2 fastest settings. | 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 2 fastest settings. | ||
</blockquote> | </blockquote> | ||
The task of designing the 7B50 was inherited and completed by [[Murlan Kaufman]]. | The task of designing the 7B50 was inherited and completed by [[Murlan Kaufman]]. | ||
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In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. | In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. | ||
In amplifier mode, gain can be varied using an uncalibrated potentiometer. | In amplifier mode, gain can be varied using an uncalibrated potentiometer. | ||
In the 7B50A, like in the 7B80, X-Y mode was an option (Opt.2). | |||
==Pictures== | ==Pictures== | ||
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<gallery> | <gallery> | ||
Tek 7b50a.jpg|7B50A | Tek 7b50a.jpg|7B50A | ||
Tek 7b50a front2.jpg|7B50A | Tek 7b50a front2.jpg|7B50A Opt.2 (X-Y) | ||
Tek 7b50a bottom2.jpg|7B50A bottom | Tek 7b50a bottom2.jpg|7B50A bottom | ||
Tek 7b50a rear2.jpg|7B50A rear | Tek 7b50a rear2.jpg|7B50A rear | ||
Tek 7b50a top2.jpg|7B50A top | Tek 7b50a top2.jpg|7B50A Opt.2 top | ||
</gallery> | </gallery> | ||
Revision as of 02:02, 10 January 2023
The Tektronix 7B50 is a timebase plug-in for 7000-series scopes, particularly the 7500 series, introduced in 1969. It is specified for triggering up to 100 MHz. Triggering uses tunnel diodes. The sweep is fully discrete, no ICs.
There is also a 7B50A, introduced in 1976. According to Bruce Hofer,
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 2 fastest settings.
The task of designing the 7B50 was inherited and completed by Murlan Kaufman.
Key Specifications
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X-Y operation
The 7B50 has a dedicated switch to put it in "amplifier mode" for X-Y operation. In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. In amplifier mode, gain can be varied using an uncalibrated potentiometer.
In the 7B50A, like in the 7B80, X-Y mode was an option (Opt.2).
Pictures
7B50
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7B50
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7B50
7B50A
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7B50A
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7B50A Opt.2 (X-Y)
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7B50A bottom
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7B50A rear
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7B50A Opt.2 top
Custom ICs used in the 7B50
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Custom ICs used in the 7B50A
Page | Model | Part nos | Description | Designers | Used in |
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155-0109-00 | M120B | 155-0109-00 • 155-0109-01 | trigger | Gary Vance | 5B25N • 5B31 • 5B40 • 5B42 • 5B44 • 5S14N • 7B50A • 7B53A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P • 7S14 • 7612D • SC502 • SC503 • SC504 |
155-0126-00 | M121 | 155-0126-00 | trigger source selector and P-P auto amplifier | Art Metz | 7B50A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P |