looks like channel model too (since it has a noise source) ~/src/gnuradio/grc/blocks$ grep 42 *.xml gr_channel_model.xml: <value>42</value> gr_noise_source_x.xml: <value>42</value>
-Josh On 03/13/2012 08:23 AM, Tom Rondeau wrote: > On Tue, Mar 13, 2012 at 10:24 AM, Damian Bevan <[email protected]> wrote: > >> Hi Tom, >> >> Thanks for the prompt and helpful advice. I have now tried changing the >> seeds on the two noise blocks to different negative values (-42 and -99), >> and it does indeed appear to have resolved the problem. Or having one >> positive (+42) and one negative (-99) also solved the problem. >> >> I think you are right that this should be in the documentation. At the >> moment the documentation is very misleading, in that a) The default seed in >> the GRC block is 42, which is a great number, but unfortunately is >> positive, and b) the documentation when you click on the block says >> "noise_source_c(gr_noise_type_t type, float ampl, long seed = 3021) -> >> gr_noise_source_c_sptr", which again hints at a positive seed (i.e. of >> +3021). >> >> Cheers, and thanks again. >> >> Damian. >> > > Damian, > Thanks for getting back to me on this. I'm going to change the > documentation to explain it. > > And I'm going to change the default values to 0 instead of 42/3201 since > 0's as good as either of those. I don't want to set it negative, though, > since that would change the output behavior of the block and someone might > be relying on this for consistency in their measurements or something. > > Tom > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
