TTL Blanking check

[Frehal]

Hi everyone,
I'm pretty new here and got a question about TTL blanking.
I have searched for info hoping I would understand (it wasn't easy.. maybe program boards looks a little different from each other (even laser drivers I think). So for safety's sake I rather like to make a fool of myself than mess this up.

For the moment I will use one laser only in DMX/auto/sound -mode and I believe the setup will look like this (I got the equipment):

*PSU+:__Laserdriver(+)__Laserdiode(+)

*PSU-:__Programboard(GND/G-),Programboard(Green/G+)__Laserdriver(-/TTL-)__Laserdiode(-)

*Programboard(Intensity Blanking)__Laserdriver(TTL+)

I couldn't find any + or - green on the programboard, just GND and Green. Which will I use for what? I hope you guys understand what I'm trying to explain!?

Best regards,
Fredrik

[ElektroFreak]

GND and green sounds like a TTL channel to me. I'd plug your modulation into that.. The intensity channel doesn't always work well for modulation. ILDA standard states to use the red channel for monochrome scanners, but all mine are using the green channel with no missing portions or anything, so that's what works well for me. There may be some variations among DACs/program boards, though..

[Frehal]

First of all, thanks for your reply.

Good for me that I check this up before I connect it.
So... if I got it right, I should connect PSU through laserdriver (+/-) to laser diode (just like a ordinary pointer connection.. without a switch). The manual for the laserdriver tells me that I should connect power- and TTL- to the same place. But which of GND and Green is - and which of them are +?

I got a ScanLSP20:
http://www.lasershowparts.com/files/.../SCANLSPPB.pdf

This is the laser driver:
http://cgi.ebay.com/3pcs-50ma-400ma-...DLVI%26ps%3D54

[ElektroFreak]

I believe in your case the (-) is interchangeable with (gnd).. I haven't used that driver specifically, but TTL is the term for a square wave pulse with values of either 0V (gnd) or 5V (+) so all you should need to do is connect the green (+) terminal on your program board to the TTL (+) input on that driver and then connect the driver's TTL (-) terminal to ground.

[Frehal]

I'll try that tomorrow.

[Things]

Pictures would help greatly too