Hi, I am new to the gnuradio environment..so please forgive me... I have an USRP B200 and I am looking to save to a file I & Q samples of bursty, random (ALOHA) messages sampled at high rate, for furter processing (in a repeatable fashion). Of course it is not possible to save 15--20 mminutes of data at 50MSPS, but using something like a "valve" (deprecated in GRC) it vould be possible:
1) to detect in real time the burst data transmission
2) to open the valve towards a file sink
A separate file could be used to record timestamp and/or length of data blocks recorded
Looking at GRC I haven't found any useable block to build a valve used at run time based on a threshold (e.g. output of a filter to detect the TX random signal) . Could anybody help?
Thanks a lot