Since these devices have different capabilities, the video splitter
does not connect the video card??™s DDC pins to either device.
In these cases, you need to specify the horizontal and vertical sync frequencies that
will work with the monitor. This is done by adding two entries to the Monitor section
of the configuration file:
HorizSync 31.5 - 90.0
VertRefresh 59.0 - 75.0
The frequency range specified on the VertRefresh line is in Hz (cycles per second).
Almost all CRT monitors handle a 60-Hz refresh rate, and most modern CRT monitors
support refresh rates up 75 Hz, which reduces eyestrain. It??™s debatable whether
pushing the refresh rate over 75 Hz can be perceived as improving the image, and it??™s
almost certain that refresh rates over 85 Hz have no benefit to most users.
Until recently, scan rates on LCD panels didn??™t make as much difference as the scan
rates on CRTs, since the liquid crystal cells were too slow to appreciably change their
state between scans, even at 60 Hz. Ever-improving LCD response times mean that
scan rate may become as much of an issue as with CRTs; fortunately, most current
LCDs support 75-Hz refresh rates.
To see if the refresh rate is low (~60 Hz) on a CRT, place a mostly
white image on the screen.
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