Mark, I don't think it will possible to generate a 5GHz signal out of the counters of the 6025E, since the counters handle a 20 MHz timebase. About the use of timed loops in LabVIEW 7.1, you can use them to synchronize as much as you can your loop with a signal you generate in hardware. To do that, you need to open the properties of the timed loop and select "Use terminal" for the Timing source. After that, just place a DAQmx Create Timing Source VI, located in the DAQmx palette, under DAQmx Real-Time. Using that VI you can select if you want to select a counter, or digital lines to control your loop. This VI (DAQmx Create Timing Source) is designed to be use basically in LabVIEW RT, but you can still use it in normal LabVIEW. I hope this helps!
GValdes Applications Engineer
