Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!brl-adm!rutgers!ames!ucbcad!ucbvax!MITRE-BEDFORD.ARPA!jhs From: jhs@MITRE-BEDFORD.ARPA Newsgroups: comp.sys.atari.8bit Subject: Re: 800XL chroma Message-ID: <8701121353.AA08472@mitre-bedford.ARPA> Date: Mon, 12-Jan-87 08:53:05 EST Article-I.D.: mitre-be.8701121353.AA08472 Posted: Mon Jan 12 08:53:05 1987 Date-Received: Mon, 12-Jan-87 21:48:02 EST References: <7474@decwrl.DEC.COM> Sender: daemon@ucbvax.BERKELEY.EDU Organization: The MITRE Corp., Bedford, MA Lines: 10 Looking at the schematic to the 800XL, it appears that the composite video output does not include any filtering to limit the bandwidth of the chroma signal before combining it with the luminance, as is normally done in television broadcasting. This would explain why the composite signal can be used as an input to the Commodore monitor's chroma input without loss of resolution. I am surprised that there is no visible difference, however, because I would think that the luminance signal might cause interference with chroma circuit operation. -John Sangster / jhs@mitre-bedford.arpa