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scrolling-h - display scrolling Hs

Display scrolling Hs on the screen as specified in CISPR 22 and similar EMC standards.

This is a simple JavaScript implementation of the code which will run on many of the web browsers independent to the operating systems.

This code is in the public domain.

For the colorbar test pattern specified in CISPR 32, see ITU-R BT.1729 Colour bar with Moving Element.

How to run it

Simply load scrolling-h.html on your JavaScript capable web browser.

Maybe you need to take some action to enable JavaScript on your browser.

If it is necessary, you can probably make the browser window full screen.

If you want to run it offline, you can save the file scrolling-h.html on your local storage.

Key operations

Change Log

Version 0.1 (2013-02-09)
Version 0.2 (2013-02-16)
Version 0.3 (2015-11-15)
Version 0.4 (2016-02-20)

Another Implementation of Scrolling Hs

Bourne shell (sh)

If you are a UN*Xer, maybe you can simply run:
while true; do echo -n H; usleep 1000; done
on your Bournish shells.

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Tom Sato

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