[rescue] VGA Scan Conversion
J. Alexander Jacocks
jjacocks at mac.com
Thu Aug 18 15:04:55 CDT 2011
On Thu, Aug 18, 2011 at 3:56 PM, Barry Callahan <barryc at rjlsystems.com>
> On 08/18/2011 03:46 PM, J. Alexander Jacocks wrote:
>> On Thu, Aug 18, 2011 at 3:41 PM, Richard<legalize at xmission.com> wrote:
>>> In article
>> <CAF-r0Y3xTDcW5PE+m4yv7FMwLqmQxOHaxgriK1tsJQesQ0BK8g at mail.gmail.com>,
>>> There are LCD multisync monitors out there. For instance
>> I was indeed aware of NEC's older line of LCDs, but I was under the
>> impression that the "MultiSync" name was just marketing, and that they
>> were only capable of specific scan frequencies, rather than the range
>> that MultiSync CRTs (and compatible) were capable of.
>> Do you actually have such an LCD? If so, I'd love to be proved wrong,
>> as acquiring an older LCD is much cheaper than a VGA scan converter.
> The CDW page linked abovelists the *MAX* vertical refresh rate at 76.
> Also, NEC's product page for it ( http://www.necdisplay.com/p/lcd175m-bk
> ) says:
> Synchronization Range
> Horizontal (Analog/Digital) 31.5-81.1 kHz
> Vertical 56-76 Hz
> Is that enough verification for you?
Well...not to be a pain, but no.
I have a Dell 2001fp, which, though an otherwise excellent LCD (IPS
panel, lots of inputs, etc.), claims to be multisync, but is not. The
Horizontal scan range 31 kHz to 80 kHz (automatic)
Vertical scan range 56 Hz to 76 Hz, exception 1600 x 1200 at 60 Hz only
But, I have found that it will not do 640x480 at 66 or 640x480 at 75, which
are within it's supposed range. I've found the same on several other
LCDs that I own.
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