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Old 12-26-2007, 03:55 PM #1
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Default TTL Modulation

What is it, and what does it allow you to do, exactly? I searched the forums and got 2 threads, neither of which explain its purpose.


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Old 12-26-2007, 07:27 PM #2
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Default Re: TTL Modulation

On a scanner you sometimes need to be able to move the mirrors without a laser line being drawn. *TTL blanking will turn the laser off.

An example, if you project a word in capital letters the blanking can be used to make sure that the letters are not joined together by a line, that part is blanked.

TTL modulation I think means to adjust the intensity of the beam rather than fully blanking it. On RGB laser projectors that would allow you to have a wider colour pallete.

Hope that helps.

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Old 12-26-2007, 09:45 PM #3
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Default Re: TTL Modulation

"TTL" means Transistor-Transistor Logic. The term is a hold-over from the old days meaning a 0-5 volt discrete on-off signal. IE: TTL modulation means 0V = off, 5V = on (or vice-versa).

"Analog modulation" would mean a varying input signal would vary the intensity of the laser.
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Old 12-27-2007, 06:28 AM #4
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Default Re: TTL Modulation

Gotcha. Thanks, guys
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Old 12-27-2007, 11:24 AM #5
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Default Re: TTL Modulation

http://www.laser-man.co.uk/2006/inde...&Itemid=72
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