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11B1: Difference between revisions
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The Tektronix 11B1 is a single time-base plug-in for the [[647]] and [[647A]], | The '''Tektronix 11B1''' is a single time-base plug-in for the [[647]] and [[647A]], specified to trigger at frequencies up to 50 MHz. | ||
specified to trigger at frequencies up to | |||
It was [[introduced in 1964]]. | It was [[introduced in 1964]]. | ||
The 11B1 uses a [[7586]] triode to buffer the vertical signal at the input, | |||
and then a differential pair of NPN transistors that form a clipping amplifier. | The 11B1 uses a [[7586]] triode to buffer the vertical signal at the input, and then a differential pair of NPN transistors that form a clipping amplifier. | ||
The trigger detection is done by a Tek part number 152-125 tunnel diode, | |||
which is a selected [[TD3A]]. | The trigger detection is done by a Tek part number 152-125 tunnel diode, which is a selected [[TD3A]]. | ||
* [http://bama.edebris.com/download/tek/11b1/11b1.pdf Tektronix 11B1 Manual (PDF)] | * [http://bama.edebris.com/download/tek/11b1/11b1.pdf Tektronix 11B1 Manual (PDF)] | ||