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Leif Asbrink leif at sm5bsz.comI changed the numbers to get a reasonable agreement with the gain values I observed on the dongles I have. I did not care to match the gain setting to the real gain better than within 3 dB (the gain step size in Linrad.) The reason is that I assume that the routines from osmocom will be changed and that other softwares that support rtl dongles will allow gain setting in a reasonable way and that the performance will become similar to the current Linrad performance. When that happens I will rewrite Linrad to use the library as intended. I see two alternatives, there could be lna gain as well as IF gain as separate controls. The other alternative would be a single gain control, but in that case both lna and if gain have to be controlled. The first few gain reduction steps have to be on the IF because the most common problem is close range interference and the improved dynamic range is useful. (In case the lna gets blocked one should install a filter.) Regards Leif / SM5BSZ On Thu, 05 Jul 2012 02:06:31 +0200 la at tfc-server.de wrote: > > The gain setting is clumsy > If it only was your gain setting function, but no, even your gain values > for the lna are just plain wrong. > I just have to ask: Why? What made you "improve" them? >