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7B92: Difference between revisions
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summary=500 MHz Dual Timebase | | summary=500 MHz Dual Timebase | | ||
image=7b92a-front.jpg | | image=7b92a-front.jpg | | ||
caption= | caption=7B92A front | | ||
introduced=1971 | | introduced=1971 | | ||
discontinued=1992 | | discontinued=1992 | | ||
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* [http://w140.com/smb/7b92a_sm.pdf Tektronix 7B92A Service Manual (OCR, PDF)] | * [http://w140.com/smb/7b92a_sm.pdf Tektronix 7B92A Service Manual (OCR, PDF)] | ||
}} | }} | ||
The Tektronix 7B92 is a 500 MHz dual timebase plug-in for [[7000-series scopes]]. | The '''Tektronix 7B92''' is a 500 MHz dual timebase plug-in for [[7000-series scopes]]. | ||
It was introduced along with the [[7904]] mainframe in 1972. | It was introduced along with the [[7904]] mainframe in 1972. In 1976, it was updated as the 7B92A. | ||
An "HF Sync" triggering mode is provided in which the trigger level | An "HF Sync" triggering mode is provided in which the trigger level | ||
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can only be read from the 10-turn analog dial. | can only be read from the 10-turn analog dial. | ||
The 7B92 has no magnifier function but its regular sweep dial setting reaches down to 500 ps/Div. | The 7B92 has no magnifier function but its regular sweep dial setting reaches down to 500 ps/Div. | ||
It also has no provision for X-Y operation. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Sweep speed | 0.5 ns/Div to 0.2 s/Div, 1—2—5 sequence (variable up to 0.5 s/Div)}} | {{Spec | Sweep speed | 0.5 ns/Div to 0.2 s/Div, 1—2—5 sequence (variable up to 0.5 s/Div)}} | ||
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The 7B92 uses a discrete trigger circuit containing [[tunnel diodes]]. | The 7B92 uses a discrete trigger circuit containing [[tunnel diodes]]. | ||
Up to serial number B069999, the 7B92A used a | Up to serial number B069999, the 7B92A used a trigger circuit with [[155-0061-00]] amplifiers and tunnel diodes. | ||
After that, the 7B92A used a [[155-0061-00]] trigger amplifier followed by a | After that, the 7B92A used a [[155-0061-00]] trigger amplifier followed by a [[155-0150-00]] trigger detector. | ||
[[155-0150-00]] trigger detector. | The 7B92A uses one other custom IC, the [[155-0049-00|155-0049-xx]] sweep control circuit. | ||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek 7b92 front.jpg | 7B92 front | |||
Tek 7b92 right.jpg | 7B92 right | |||
Tek 7b92 left.jpg | 7B92 left | |||
7b92a-front.jpg | 7B92A front | |||
Tek 7b92a front2.jpg| 7B92A | |||
Tek 7b92a right.jpg | 7B92A right | |||
Tek 7b92a left.jpg | 7B92A left | |||
Tek 7b92a block.png | 7B92A block diagram | |||
7b92a-triggering-974mhz.jpg | A 7B92A (B098xxx) triggering a 974 MHz sine applied to a [[7904]] mainframe via a 067-0587-02 calibration fixture (maximum triggerable frequency for this specimen). | |||
Tek7904-7a19-7b92a-1010mhz-hfsync.jpg | A 7B92A (B098xxx) displaying a 1.01 GHz sine in HF Sync mode on a [[7904]] mainframe via a [[7A19]] amplifier (maximum signal generator frequency). | |||
</gallery> | </gallery> | ||
[[Category:7000 series horizontal plugins]] | [[Category:7000 series horizontal plugins]] | ||