On (17 Feb 95) [EMAIL PROTECTED] wrote to All... e> From: Mr Andrew M Gale <[EMAIL PROTECTED]> e> Date: Fri, 17 Feb 95 13:05:35 GMT
e> I doubt an NTSC tv could display a PAL picture e> adequately... some PAL tvs will show an NTSC e> picture - the line freq. is the same (I think)- e> it's just the vertical frequency that matters. e> A Pal tv showing NTSC just stops after line e> 262 and jumps back to the top of the screen, but e> an NTSC tv showing PAL would have hassles - the e> PAL signal has 312 line so the tv would run out e> of vertical space after line 262. That's not quite the case, assuming the NTSC set could lock to the 50Hz vertical sync then it would simply try to squeeze 312 lines of video onto 262 "lines" of phosphor and not over-scan the bottom of the screen. You are correct the line frequency is the same so the EHT on the NTSC set will still be generated correctly:-) Actually I think you'll find that the vertical raster heigth of a NTSC set would be reduced as the coils are wound for 60Hz and would be less efficient at 50Hz! That's based on the fact that ANY transformer of a given VA rating will allways be physically smaller if wound for 60Hz supply than if it's wound for a 50Hz supply:-) Johnathan. -- |Fidonet: Johnathan Taylor 2:2501/307.9 |Internet: [EMAIL PROTECTED] | | Standard disclaimer: The views of this user are strictly his own.
