Date: Thu, 27 Mar 1997 10:49:22 -0700 From: Steve Passe <smp@csn.net> To: Richard Tobin <richard@cogsci.ed.ac.uk> Cc: Amancio Hasty <hasty@rah.star-gate.com>, multimedia@freebsd.org Subject: Re: newest bt848 driver Message-ID: <199703271749.KAA10979@Ilsa.StevesCafe.com> In-Reply-To: Your message of "Thu, 27 Mar 1997 13:07:57 GMT." <199703271307.NAA07476@deacon.cogsci.ed.ac.uk>
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Hi, > > Well, how is the card working over there ?? > > So far it tunes in the broadcast channels, but fxtv displays them in > black-and-white and doesn't show the whole picture (there's also black > space to the left and top of the picture). I'll let you know when there's > more progress. I suspect we are slightly mis-tuned, this will cause loss of the color-burst portion of the signal. I found a freq table provided in a developers kit for their i2c chips and although it agrees in general with your simple table, individual channels within the list jump all over the place. Lets concentrate on 2 or 3 of your "strongest" channels, ie ones that you get the best reception for on a normal tv. Tell me those channel #s and I'll hand build a table that provides the exact for those specific channels. I'm also going to add a program called "freq.c" to the webpage that allows you to directly plug in frequencies. Note that this program is VERY dumb and only deals with the raw (fRF * 16) values, not the actual frequencies in mHz. --- Here's the philips table for your own experimentation: /* * caution, many of the actual offsets don't match the OFFSET column * * 1 4525 700 N21 * * 2 4825 700 E2 * 3 5525 700 E3 * 4 6225 700 E4 * * 5 17525 700 E5 * 6 18225 700 E6 * 7 18925 700 E7 * 8 19625 700 E8 * 9 20325 700 E9 * 10 21025 700 E10 * 11 21725 700 E11 * 12 22425 700 E12 * * 13 5375 700 ITA * 14 6225 700 ITB * * 15 8225 700 ITC * * 16 17525 700 ITD * 17 18325 700 ITE * * 18 19225 700 ITF * 19 20125 700 ITG * 20 21025 700 ITH * * 21 47125 800 E21 * 22 47925 800 E22 * 23 48725 800 E23 * 24 49525 800 E24 * 25 50325 800 E25 * 26 51125 800 E26 * 27 51925 800 E27 * 28 52725 800 E28 * 29 53525 800 E29 * 30 54325 800 E30 * 31 55125 800 E31 * 32 55925 800 E32 * 33 56725 800 E33 * 34 57525 800 E34 * 35 58325 800 E35 * 36 59125 800 E36 * 37 59925 800 E37 * 38 60725 800 E38 * 39 61525 800 E39 * 40 62325 800 E40 * 41 63125 800 E41 * 42 63925 800 E42 * 43 64725 800 E43 * 44 65525 800 E44 * 45 66325 800 E45 * 46 67125 800 E46 * 47 67925 800 E47 * 48 68725 800 E48 * 49 69525 800 E49 * 50 70325 800 E50 * 51 71125 800 E51 * 52 71925 800 E52 * 53 72725 800 E53 * 54 73525 800 E54 * 55 74325 800 E55 * 56 75125 800 E56 * 57 75925 800 E57 * 58 76725 800 E58 * 59 77525 800 E59 * 60 78325 800 E60 * 61 79125 800 E61 * 62 79925 800 E62 * 63 80725 800 E63 * 64 81525 800 E64 * 65 82325 800 E65 * 66 83125 800 E66 * 67 83925 800 E67 * 68 84725 800 E68 * 69 85525 800 E69 * * 70 4575 800 IA * 71 5375 800 IB * 72 6175 800 IC * * 74 6925 700 S01 * 75 7625 700 S02 * 76 8325 700 S03 * * 80 10525 700 S1 * 81 11225 700 S2 * 82 11925 700 S3 * 83 12625 700 S4 * 84 13325 700 S5 * 85 14025 700 S6 * 86 14725 700 S7 * 87 15425 700 S8 * 88 16125 700 S9 * 89 16825 700 S10 * 90 23125 700 S11 * 91 23825 700 S12 * 92 24525 700 S13 * 93 25225 700 S14 * 94 25925 700 S15 * 95 26625 700 S16 * 96 27325 700 S17 * 97 28025 700 S18 * 98 28725 700 S19 * 99 29425 700 S20 * * 100 3890 000 IFFREQ * */ -- Steve Passe | powered by smp@csn.net | Symmetric MultiProcessor FreeBSD
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