View Full Version : Monitor tuning: Solving equations

15th December 2009, 22:51
Okay, it's been a long time.

Given the formula:
RR = DCF / (HFL * VFL)

RR = Screen refresh rate. I'm looking for 60hz which my monitor does.
DCF = Dot Clock Frequency. My screen is 135Mhz
HFL&VFL = Horizontal and Vertical frame length.

This gives:

60hz = 135Mhz / (x * (0,75x))

So to my question.

1) Is this right?
2) How does this calculate? My brain has forgotten these simple equations.

First we need to convert 135Mhz to hz I guess. So we multiply with 1000.

But from there...

My screen:
Native resolution: 1280x1024@60Hz
Colck freq: 135MHz
Hor freq: 30kHz - 80kHz
Ver freq: 55Hz - 76Hz

Yes, this is in preparations for Antonis and mine session. I worked this out back in highschool, had it written down but I can't find back to it.:Doh: