7B92: Difference between revisions
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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)] | ||
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The Tektronix 7B92 is a 500 MHz 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. | |||
An "HF Sync" triggering mode is provided in which the trigger level | |||
control varies the frequency of a built-in oscillator to lock on to the input | |||
for input signals from 100 to 500 MHz, providing higher sensitivity than the | |||
direct trigger (which is specified up to 500 MHz as well). | |||
Internal jumpers are provided to configure the 7B92 for operation in 7800/7900 vs. slower mainframes, | |||
and to select whether the variable control affects the delaying or the delayed time base. | |||
==Specifications== | ==Specifications== | ||
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{{Spec | Ext Trig input | 1 MΩ // 20 pF or 50 Ω }} | {{Spec | Ext Trig input | 1 MΩ // 20 pF or 50 Ω }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Internals== | |||
The 7B92 uses a discrete trigger circuit containing [[tunnel diodes]]. | |||
Up to serial number B069999, the 7B92A used a discrete trigger circuit. | |||
After that, the 7B92A used a [[155-0061-00]] trigger amplifier followed by a | |||
[[155-0150-00]] trigger detector. | |||
==Pictures== | ==Pictures== | ||
Revision as of 23:30, 1 October 2014
Template:Plugin Sidebar 2 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.
An "HF Sync" triggering mode is provided in which the trigger level control varies the frequency of a built-in oscillator to lock on to the input for input signals from 100 to 500 MHz, providing higher sensitivity than the direct trigger (which is specified up to 500 MHz as well).
Internal jumpers are provided to configure the 7B92 for operation in 7800/7900 vs. slower mainframes, and to select whether the variable control affects the delaying or the delayed time base.
Specifications
Key Specifications
| Sweep speed | 0.5 ns/Div to 0.2 s/Div, 1—2—5 sequence (variable up to 0.5 s/Div) |
|---|---|
| Delay time | 0 to 9.9 Div |
| Triggering | 0.5 Div or 100 mV up to 20 MHz, 1 Div or 500 mV up to 600 MHz |
| Jitter | < 50 ps at 600 MHz |
| Ext Trig input | 1 MΩ // 20 pF or 50 Ω |
Internals
The 7B92 uses a discrete trigger circuit containing tunnel diodes.
Up to serial number B069999, the 7B92A used a discrete trigger circuit. After that, the 7B92A used a 155-0061-00 trigger amplifier followed by a 155-0150-00 trigger detector.
Pictures
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7B92 front
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7B92 right
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7B92 left
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7B92A front
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7B92A right
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7B92A left
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7B92A block diagram
