How to use start and reference trigger on HI-Scope digitizer

Question

HI,
I would like to ask about the start and reference trigger with PCI-5124.
I found an sample VI on the following link, however it doesn't work as I expected.
http://zone.ni.com/devzone/cda/epd/p/id/2998
The VI "start_and_reference_trigger.vi" can detect both start and reference trigger in my system and they start data acquisition.
It starts data acquisition when both start and reference triggers are input.
However what I would like to do is:
 1. Sampling rate at 200MHz with record length 1500 with one channel.
 2. Receive the start trigger (i.e. 50Hz)
 3. Receive the reference trigger (i.e. 50kHz)
 4. For every reference trigger, I would like to acquire the data, i.e. acquiring 1500 data for each 100 reference trigger (not with the combination with the start trigger)
Start trigger: _|^|_________________________________________
Ref   trigger:______|__|__|__|__|__|__|__|__|__|__|__|__|__|__|____
                                   ^    ^    ^    ^   ^   ^   ^   ^    ^    ^   ^    ^    ^   ^  
                                 trigger timings that I would like to acquire
With the sample VI "start_and...", I found that it acquires when both start and reference trigger comes and the data acquisition is only after the one reference trigger. 
I hope my explanation is understandable and I can have a solution soon.
解決済！
解決策の投稿を見る。

Answer 1

Hi Tom 1225,
Thanks for posting on Discussion Forum.  Based on your statement, I guess, what you want PCI-5124 to do is what general bench-top type oscilloscopes do.  To realize that functionality, at the end of each sampling of a record length, PCI-5124 has to rearm its trigger for its next sampling.  The amount of "rearm time" is listed in "trigger" section on 5124 manual, said that the rearm time is 10[us] when TDC is ON and 2[us] when TDC is OFF.  So, we have to keep in mind that, if one waveform of measured signal is shorter than 2[us] (TDC OFF), more than one waveform may fail to kick the trigger, because 5124 still rearming its trigger.     
I made two samples and attached them on this post.  
In "Sample SW Timing Trigger.vi", trigger rearm occurs at software timing, when the time NI-Scope Start function is called.  In "Sample HW Timing Trigger.vi", trigger rearm occurs at hardware timing.  As seen on the block diagram, for a hardware timing trigger rearm, the number in "number of records" of horizontal setting function should be equal to the times of the trigger-based measurements.  If you have any question on my sample VIs, feel free to ask.  If my post resolves your problem, please click on the green "解決策に決定" icon on my post.  
Osamu Fujioka
Applications Enginner 
National Instruments Japan
添付:
Sample SW Timing Trigger Rearm.vi ‏28 KB
Sample HW Timing Trigger Rearm.vi ‏31 KB