Radar and Oscilloscopes

 

A practical commercial radar display requires a signal from a rotating aerial to produce a picture on the cathode-ray tube. It is, therefore, seldom possible to use fully practical radar equipment in studio productions.

Radar scanner

To simulate a working radar it is possible to have a ‘display’ which is scanned by a rotating radial ‘beam’ of light. This can be achieved by using a rotating disc of clear plastic sprayed with black paint in such a way that it fades gradually from clear to opaque. The opaque section should cover at least one third of the disc, while the clear area should be in the form of a narrow line.

The disc is fitted to the extended spindle of a gear box driven by an electric motor. Alternatively ...

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