Timestamp resolution in DSC

[josborne]

I know that citadel has a timestamp resolution of 100 nanoseconds... but I have also heard that LV DSC has a resolution of only 1 millisecond.

I know I could figure this out with a little testing, but I was wondering if the following is true:

1. If you log data to citadel using LV DSC, the default resolution for all timestamps is only 1 ms. This means the LabVIEW-DSC-generated timestamps are of 1 ms accuracy.

2. However, if you build your own VI-based device server, you can specify your own timestamps. Can these timestamps be of up to 100 ns accuracy?

[Carl L. · Accepted solution]

You are correct. The time resolution for ODBC is 10 ms, for DSC Tag Engine it is 1 ms and for Citadel it is 100 ns. Of course you will be limited by the lowest resolution. When retrieving data through ODBC you will only get a resolution of 10 ms even though the data was logged with a resolution of 1 ms.
If you create a vi-based server it will still use the Tag Engine and thus be limited to the 1 ms of resolution.