Suggestions for external TTL trigger devices?

We're talking in our lab right now about setting up a central TTL pluse 
generator to act as the "master sync" for several data acquisition 
systems.  Does anyone have any recommendations or suggestions about what 
to get?

Ideally we'd like it to have multiple output channels, as we'll have 
different instruments being sampled at different rates.    We might be 
sampling some analog data at 100 samples/sec, and triggering a video 
frame grabber at 30 samples/sec for example.

Received on 2003-12-10Z20:22:01