Accessing RX timestamp through C API, also latency

General Discussion
1

I’m trying to use the LimeSDR for a precisely timed receive only application. I need to know exactly the time of the sample.

I see there is a 64 bit RX timestamp … can this be accessed from LMS C api ?

Does the RX timestamp get generated on board power on and keep counting continuously through start and stop of the stream ? The timestamp comes from the LMS7002M I gather in the stream protocol. Can the LMS7002M RX timestamp be reset via register ?

Even if I get the FPGA to know the time I’m concerned about the variable latency when stream is started and stopped etc.

@andrewback any ideas ?

Thanks Tim

2

There is a receive timestamp and this is used by cellular applications. I think it’s generated in the FPGA and not sure if it’s just a sequence that would reset when you stop/start the stream, but @Zack should be able to advise.