3B4: Difference between revisions
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(moved incorrect reference to a real time adaptor to the 3t4) |
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| series=560-series scopes | | series=560-series scopes | ||
| type=3B4 | | type=3B4 | ||
| summary= | | summary=Timebase plug-in | ||
| designers= | | designers= | ||
| image=3b4_front.jpg | | image=3b4_front.jpg | ||
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| discontinued=(?) | | discontinued=(?) | ||
| manuals= | | manuals= | ||
* [[Media:070-431.pdf|Tektronix 3B4 Manual]] | * [[Media:070-431.pdf|Tektronix 3B4 Manual]] | ||
* [http://bama.edebris.com/download/tek/3b4/3b4.djvu Tektronix 3B4 Manual @ BAMA] (DjVu) | * [http://bama.edebris.com/download/tek/3b4/3b4.djvu Tektronix 3B4 Manual @ BAMA] (DjVu) | ||
* [[Media:Tek 3b4 fcp jan 1969.pdf|Tektronix 3B4 Factory Calibration Procedure, January 1969]] | * [[Media:Tek 3b4 fcp jan 1969.pdf|Tektronix 3B4 Factory Calibration Procedure, January 1969]] | ||
* [[Media:Tek 3b4 fcp june 1967.pdf|Tektronix 3B4 Factory Calibration Procedure, June 1967]] | * [[Media:Tek 3b4 fcp june 1967.pdf|Tektronix 3B4 Factory Calibration Procedure, June 1967]] | ||
}} | }} | ||
The '''Tektronix Type 3B4''' is a timebase plug-in for [[560-series scopes]], introduced in 1964. | The '''Tektronix Type 3B4''' is a timebase plug-in for [[560-series scopes]], introduced in 1964. | ||
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</gallery> | </gallery> | ||
==Components== | |||
{{Parts|3B4}} | {{Parts|3B4}} | ||
[[Category:560 series plugins]] | [[Category:560 series plugins]] | ||
Revision as of 01:34, 26 November 2023
The Tektronix Type 3B4 is a timebase plug-in for 560-series scopes, introduced in 1964.
It was intended primarily for use with the 561A, but works fine in other 560-series scopes. The 3B4 is unusual in having an explicit "FREE RUN" mode.
In the triggered modes, the tunnel diode-based triggering is rated to work to 20 MHz. The vertical bandwidth of typical 560-series (non-sampling) scopes is about 10 MHz, so 20 MHz is adequate.
Triggering is done with a TD3A 4.7 mA tunnel diode. The trigger input is amplified and buffered by a 6DJ8-based differential amplifier driving a common-emitter 2N964 germanium PNP transistor whose collector current switches the tunnel diode.
Key Specifications
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Links
Pictures
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Front View
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Left Side View
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Right Side View
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Top View
