Date: Mon, 7 Jun 1999 11:33:16 +0200 From: Ladavac Marino <mladavac@metropolitan.at> To: 'Alfred Perlstein' <bright@rush.net>, questions@freebsd.org Subject: RE: suggestions for a keyboard/monitor switch? Message-ID: <55586E7391ACD211B9730000C110027617963E@r-lmh-wi-100.corpnet.at>
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> -----Original Message----- > From: Alfred Perlstein [SMTP:bright@rush.net] > Sent: Monday, June 07, 1999 11:36 AM > To: questions@freebsd.org > Subject: suggestions for a keyboard/monitor switch? > > > I've got a boatload or PCs and a sparc here along with a 21" > monitor, I've been trying to get a keyboard/monitor switch > however, every model i've tried distorts the signal to the > monitor so that at 1600x1280 there is a visible blur. > [ML] Let's see: 1600x1280@72Hz is 150 MHz of pure picture data bandwidth. Sync gaps add up to approx. 220 MHz (which is probably the RAMDAC clockrate you are using.) OTOH, keyboard/monitor switches are unshielded cheap mechanical monstrosities which have problems with anything over 100 MHz or thereabouts. It takes somewhat more money to switch 220 MHz signals without introducing distortion (i.e. your typical el-cheapo CMOS analog signal switch will not do either). Sorry, this seems to be the geist of it :( /Marino > Anyone have any suggestions on a model that may work, perhaps > something that can boost/filter the signal? I guess it's a > lot to hope for when you have an analog signal... [ML] at that bandwidth, yes. > thanks, > -Alfred > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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