Re: Mac to VGA Adapter Question

[mjmahon@aol.com (Michael J. Mahon)]

Bryan Parkoff top-posted:

>    My monitor is Sony Multiscan W900.  It does have NTSC switch.  I believe
>that it supports least 30.0KHz.  I don't know if it has 15KHz.  Now, you
>mentioned that there is rare adapter that allows to cause Sony Multiscan
>W900 to accept 15KHz using Sony's NTSC switch.  Please advise.

NTSC is, by definition, 15kHz horizontal sweep frequency.

>\Bryan Parkoff
>BParkoff@satx.rr.com
>
>"Mitchell Spector" <a_specto@alcor.concordia.ca> wrote in message
>3d89a8c7.8731696@news.videotron.ca">news:3d89a8c7.8731696@news.videotron.ca...
>> dempson@actrix.gen.nz (David Empson) wrote:
>>
>> >Bryan Parkoff <BParkoff@satx.rr.com> wrote:
>> >> Do you think that Apple IIgs will be compatible to Mac to VGA Adapter
>so
>> >> it will allow me to view SVGA monitor to Apple IIgs video port through
>Mac
>> >> to VGA Adapter.
>> >
>> >It won't work by itself.  You would also need a devise which doubles the
>> >scan frequency, so that the monitor is able to lock onto the video
>> >signal.
>>
>>     There is a _rare_ exception where these Mac-to-VGA adapters can
>> be used on the IIgs. That is if the monitor supports lower horizontal scan
>> frequencies in addition to standard VGA frequencies. A handful of older
>> VGA monitors could drop down to 15.75 kHz (NTSC scan rate) but they
>> were unusual a decade ago and don't at all exist today--at least to the
>> best of my knowledge.
>>
>>     I have a 14" NEC MultiSync 3D which works on my Windows PC
>> *and* the IIgs using nothing more than a Mac adapter. Several other
>> brands exist that support 15-30+ kHz, including some made by Sony.
>> I still prefer the AppleColor RGB for a few reasons though...

-michael

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