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The 7B92 uses a discrete trigger circuit containing [[152-0177-02]] [[tunnel diodes]]. | The 7B92 uses a discrete trigger circuit containing [[152-0177-02]] [[tunnel diodes]]. | ||
[https://vintagetek.org/years-at-tektronix-hofer/ | [https://vintagetek.org/years-at-tektronix-hofer/ Bruce Hofer recalls] investigating an issue where | ||
early 7B92 models exhibited sweep anomalies especially near the start of the sweep | early 7B92 models exhibited sweep anomalies especially near the start of the sweep. | ||
After trying to fix these he convinced management that a redesign was needed. | |||
This resulted in [[Patent US 4009399A]], the [[7B92A]] update, and the [[067-0657-00]] calibration fixture. | This resulted in [[Patent US 4009399A]], the [[7B92A]] update, and the [[067-0657-00]] calibration fixture. | ||
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The effect of this jumper is only noticeable for sweep speeds of 20 μs/Div and faster, | The effect of this jumper is only noticeable for sweep speeds of 20 μs/Div and faster, | ||
since at those sweep speeds the smallest shunt capacitance is used on pin 8, and the holdoff time is minimal. | since at those sweep speeds the smallest shunt capacitance is used on pin 8, and the holdoff time is minimal. | ||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek 7b92 front.jpg | 7B92 front | Tek 7b92 front.jpg | 7B92 front | ||
Tek 7b92 right.jpg | 7B92 right | Tek 7b92 right.jpg | 7B92 right | ||
Tek 7b92 left.jpg | 7B92 left | Tek 7b92 left.jpg | 7B92 left | ||
</gallery> | </gallery> | ||
{{Custom ICs| | {{Custom ICs|7B92}} | ||
[[Category:7000 series horizontal plugins]] | [[Category:7000 series horizontal plugins]] |