Thank for the explanation. I misunderstood the meaning of NONE and AUTO. I tried more to understand the behaviour of scan. Reading the code of scan it seems that any of the 2 FECs, when they are NONE, they are converted in AUTO before scanning. The initial scan file for uk-CrystalPalace is T 505833333 8MHz 3/4 NONE QAM16 2k 1/32 NONE I've tried to change them to AUTO and apparently this is the maximum I could change: T 505833333 AUTO 3/4 AUTO QAM16 2k 1/32 AUTO So the question is: what is special about the ones I cannot set to AUTO? I'm trying to understand why Kaffeine is not able to scan properly: kaffeine tries with the following settings inv:2 bw:0 fecH:9 fecL:9 mod:6 tm:2 gi:4 hier:4 which in the scan language is T frequency 8MHz AUTO AUTO AUTO AUTO AUTO AUTO This is good for the HDTV channels (it works for scan as well) but for the "standard" I need to specify (at least) T 505833333 AUTO 3/4 AUTO QAM16 2k 1/32 AUTO as I said before. As a reference this is one of the stardard channels: BBC ONE:505833330:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_3_4:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:600:601:4164 while this is one working with AUTO ITV HD Trialb:522000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:161:162:41029 Is there any substantial difference? Thanks On 10/22/06, Patrick Boettcher <patrick.boettcher@xxxxxxx> wrote:
The original problem was not to set all parameters to wrong values (this is what you are doing NONE is wrong in this field, AUTO, 1/2, 2/3, 3/4 5/6 and 7/8 are valid) and then let the demod guess what might be correct, but to see if parameters set to AUTO are then really autosearched. > So it seems that one has to specify 3/4 for the standard channels > (QAM16 2k), while for HDTV channels (QAM64 8k) NONE is good enough. "Good enough" is not the correct term. This is not a tuneable parameter but a fixed one telling you which FEC is used by the boardcaster.
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