Can the 1408 sync signals loopback for external lock mode?

[CoandaEng]

Is it possible to output the HSYNC, VSYNC, and PCLK signals on the external trigger lines, and have them loopback to the inputs of the 1408 board when it is running in external lock mode?

[Brent_R]

It is possible to receive these signals from the camera and route them out the trigger lines, but the 1408 will not generate the pulses from scratch.

Regards,

Brent R.

[Kyle_V]

The trigger outputs on the 1408 are static digital lines, but you can use the IMAQ Generate Pulse.vi to output each of the sync signals. The hard part will be synchronizing the three pulse trains together, since they will be independent in hardware.

From there you can send then sync singnals (probably just the HSYNC and VSYNC) to the camera AND to the frame grabber.

A warning though, this has the possibility of becoming a timing mess. It would be a lot easier if your camera would output these signals on its own, which is pretty common on asynchronous reset cameras.

Also, if the camera resolution is standard (like 640x480 for RE-1709) then there is no need for a pixel clock. You just need the HSYNC and VSYNC, or a CSYNC signal to dictate the frame rate.

S
o I guess to answer your question, the answer is...yes, it is possible.

Please keep me updated.

Kyle V

[Kyle_V]

WHOOPS!!

I think I was confused, the IMAQ Generate Pulse.vi only works on the 1409 and the digital frame grabbers. So with a 1408, you cannot generate the sync pulses to your camera.

However, the stategey in my previos post will work for a 1409, which is the upgraded to the 1408.

Sorry for the confusion!

Kyle V