Main > Monitor/Video Forum
How to get the frequencies for my TV?
SmartBomb:
I'd like to use AdvanceMAME for my emulator. It needs to know things like horizontal freq, vert. freq, pixel clock (?). These are not listed in my TV manual and I've Googled it to hell but can't find them.
How can I find this info? It's a 27" Philips Magnavox if that helps.
ericball:
Assuming you are talking NTSC (North American standard):
Vertical refresh : 59.46 Hz (interlaced)
Horizontal refresh: 15.734 kHz
Pixel clock ~3.5795 MHz
wpcmame:
Horizontal freq should be around 15.75KHz. Monitors are analog devices so some variation should be fine e.g. 15.7 - 15.8. Many monitors supports a wider range but TVs are more picky.
Vertical frequency is 60Hz for NTSC and 50Hz for PAL. Note that supporting both NTSC and PAL doesn't mean that the whole range 50-60Hz is supported. You might need more than one line in advmame.rc to describe the monitor in that case.
Pixel clock is a property of your graphic card, not the monitor.
SmartBomb:
Aha...so the horiz. and vert. frequencies are more a function of the standard (NTSC) than of the TV itself?
I will try the values given...don't worry, I won't hold anyone responsible if it damages the TV!
wpcmame:
--- Quote from: SmartBomb on March 07, 2005, 10:02:12 pm ---Aha...so the horiz. and vert. frequencies are more a function of the standard (NTSC) than of the TV itself?
--- End quote ---
No, the monitor probably supports a wider range of both horizontal and vertical timing but since it isn't stated in the manual you don't know where the limits are.
Running the monitor outside its limits will damage it or at least decrease its lifetime so the only safe range to use is the NTSC standard.