On 13 November 2015 at 08:45, 김상혁 <[email protected]> wrote: > I tried sending/receiving a text file using 'GMSK Mod' and it worked. > When I replaced 'GMSK Mod’ to ‘QAM Mod’ (also DeMod), however, it doesn’t > receive anything. > My flow graph and result like below: > freq : 325MHz, samp_rate : 2MHz > - Tx > file source(.txt) -> packet encoder(samp/symb: 8, bit/symb: 4) -> 16QAM > Mod(samp/symb: 8) -> osmocom sink > - Rx > osmocom source -> 16QAM DeMod(samp/symb: 8) ->packet decoder -> file sink
I'm not sure that I can help without knowing some more details. Could you attach or upload your working and non-working flowgraphs? > I think two-possible reason > 1) Tx power limit ; then how can i control Tx power ? You can control the gain levels in the osmocom_sink block. > 2) center frequency not clear ; but, i cannot find fine frequency. On the receiving end you could use gqrx or a flowgraph with a waterfall plot to find the frequency of the signal. _______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
