On Wednesday 30 August 2006 09:54, Dieter wrote: > > > That's 4 jumpers, just for TV. Can't get away from those pesky > > > jumpers. > > > > If OG can't get away from it, why can the rest of the planet? > > > > I don't know a single graphics device that has jumpers for PAL/NTSC, let > > alone for the derived standards. > > Many analog television products are customised for each market. > OGC could do this by having eleven (or whatever the actual number is) > versions of firmware, but that would raise costs more than 4 jumpers. >
Or by having a (very) small array of 0402 resistor pads, and only populating a few of the landpads with 0R0 shorts to set up the signals required. Not only would that (probably) be cheaper than placing jumpers, but it would also take up less PCB real estate. I suspect this would also be an acceptable solution to the problem of different regional emissions requirements for wifi cards. The legislation usually requires that the hardware is not "user-modifiable", and with careful PCB design you could make it so that you'd have to have specialist equipment and a very steady hand to avoid bricking your card, should you try to change the frequency ranges... of course, for that purpose you'd use 0201 or 01005 resistors... Peter -- Fisher Society publicity officer http://tinyurl.com/o39w2 CUSBC novices, match and league secretary http://tinyurl.com/mwrc9 Quake II build tools maintainer http://tinyurl.com/fkldd v3sw6YChw7$ln3pr6$ck3ma8u7+Lw3+2m0l7Ci6e4+8t4Gb8en6g6Pa2Xs5Mr4p4 hackerkey.com
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