- Jan 23, 2009
I feel rather dumb to ask this, but I'd really like to know. Espicially if I buy a laser that has it/uses it?
Now, maybe, to make artificial analogue modulation?Uhm, no, this can be used only for turn on and off, and the speed don't depend from the voltage ..... basically, anything under a certain voltage (usually 2V, in some cases 1,2V), turn it on (or off, in the reversed TTL, and anything over 2/2,2V turn it off (or on, in the reversed TTL) ..... there's a small hysteresis zone in the middle, for avoid "flickering", but not too much .....
The speed of the turn on/off cycle is usually at least 10 KHz, in most of the professional units can reach easily 35/40 KHz, and in telecommunication modules you can drive them at MHz range (but this speed have no sense in lasershows) ..... and, ofcourse, being TTL, more the signal is squared, better it is .....