Re: Tektronix 7104 and 7D20 showstopping?


Don Black <donald_black@...>
 

Is there a concept book that describes the micro-channel tube and how it works?

Don Black.

On 07-Apr-13 5:23 AM, Craig Sawyers wrote:
 

> Then there is the internal 7104 readout display.
>
> Why does this not burn-out MCP?

It does. That is why the readout intensity knob has an off position, and a
pulsed mode that operates in several ways depending on a range of settings.
If you leave it operating continuously it will absolutely reduce the
sensitivity of the MCP at the readout positions. I have some images in the
pics section of Tekscopes that show an image of a single shot trace at
200ps/div from a TD pulser. Those were taken with a Tek C1002 CCD camera.
The slight graininess of the trace is due to the granular nature of
individual electrons striking the MCP before amplification. It is a helluva
tour de force of analogue scope engineering to do this.

Craig


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