PicoScope 7 Software
Available on Windows, Mac and Linux
Martyn wrote:Rapid block will be the correct mode, you will need to set Memory Segments to something larger than 20000, say 1000000, and NoOfCaptures to 20000. Your sample interval is 1usec, time base is the wrong term, which means 50 samples could be taken across a single cycle of the ttl pulse. You only need 30, although I would suggest 40 and capture from the trigger point. This would leave 10usecs for the scope to rearm for the next block.
The whole capture process to the scopes memory should be 1 second, you then need to retrieve all the data from the scope, to the driver and then onto the application, and this will take time, particularly with LabVIEW.
If you are still having problems try increasing the sampling rate to 1GS/s and capture 40000 points per capture, and just down sample when retrieving data from the device. Trigger rearm time in rapid block will vary with sampling rate, I am not sure on the value when sampling at 1MS/s, at the fastest rates it is around 1usec.
Hope this helps.