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Sebastian Böhm Sebastian.Boehm at b-tu.deDoes anyone have any idea what could be the reason for this behavior? Am 01.12.2020 um 16:28 schrieb Sebastian Böhm: > Hi, > > i try to transmit 2.48 ghz radio packets (beacons) at a fixed time > interval (e.g. every 1 s) via hackrf using the osmocom sink in > gnuradio. Without exception, the beacons are all received by my > sniffer "golden device" hardware, but burst. > > It seems that the packets are only transferred via USB to the hackrf > device hardware when the buffer with the fixed BUF_LEN 262144 > (32*16*512) is completely filled. For my setup this are e.g. 18 beacon > frames, which are transmitted as burst. When I look at the USB > interface, I can see this burst of data every 18 seconds in a full USB > request block (URB) of size 262144 byte. All other URBs (also of size > 262144 - every approx. 200us) transferred via USB are filled with > zeros only. So this burst behavior should be caused by gnuradio. > > How can I achieve that the complex data of the osmocom sink's input is > immediately (with the next URB) transferred to the hackrf hardware? Am > I missing any options of the GRC module? > > Thank You in advance! > > Regards, > Sebastian > -- > __________________________________________________________ > > Sebastian Boehm > Brandenburg University of Technology Cottbus - Senftenberg > Computer Networks Communication Systems Group > > E-Mail: sebastian.boehm at b-tu.de <mailto:Sebastian.Boehm at b-tu.de> > > P.O. Box: 10 13 44 > D-03013 Cottbus > GERMANY -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20201209/bda963de/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 5485 bytes Desc: S/MIME Cryptographic Signature URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20201209/bda963de/attachment.bin>