Interference at 60HZ

steven123 · 18-01-2006, 13:53

I have recently noticed that when I play a PS2 game at 60HZ I get wavy interference type lines over the screen. The picture is still perfectly visible and in colour but the interference effect constantly moving over the screen can be annoying. The picture is perfect and interference free in normal 50HZ mode. I haven’t noticed any interference effects on other devices I use with the TV e.g. Freeview or DVD Player although of course these don’t run at 60HZ.

I am sure the TV is not at fault as it is a 32 inch Widescreen set and under one year old so should easily be able to handle 60HZ.

The Scart cable I have been using is a RGB multi format one i.e. it has connectors for the Gamecube and X Box as well as PS2 although I only use it with PS2 as connecting other consoles weakens the picture.

I have another cheapo RGB Scart lead from my old PS1 which does seem to suffer less from the interference effect but due to its low quality suffers from a pretty obvious ghosting effect.

Does anyone know what could be causing these effects? I think it could be related to the Scart cable although would like a bit of confirmation before buying yet another one and if I do buy one I want to make sure it’s a high quality one that isn’t likely to suffer from these ghosting or interference effects.

Any advice much appreciated

elpaw · 18-01-2006, 13:59

It's probably 60Hz beating with the 50Hz of the power supply.

steven123 · 18-01-2006, 14:20

Quote:

Originally Posted by elpaw

It's probably 60Hz beating with the 50Hz of the power supply.

Hmm could you explain that a little, i thought i had pretty good technical know how but thats got me baffled, i can only guess you mean the power supply frequency is out of synch with the display frequency (50HZ vs 60HZ)? Is there anything that can be done about that?

elpaw · 18-01-2006, 14:50

It's probably not a case of the display frequency being out of synch, I assume the display frequency is 60Hz (otherwise you would have some weirder effects taking place). It's most probably the 50Hz electric power supply in all your electrical wiring in the room producing 50Hz RF waves, which are being picked up by the component cables (acting like aerials) between your PS2 and the TV. They are sending 60Hz signals, and so the 50Hz and 60Hz signals are beating. Better shielded cables will reduce this effect, although to get rid of it, play your PS2 game at 50Hz

steven123 · 18-01-2006, 16:41

Ok thanks for explaining I think I get it now. I think shielding could be a issue as both the Scart leads I have for the PS2 are very thin and probably are not individually screened like decent Scart to Scart cables are. I didn't intentionally get cheap cables but I simply couldn't find a official Sony Scart (official peripherals are generally top notch) so just had to take chances on third party ones.

Anyway as I said everything works fine at 50HZ so I will keep it that way, the only reason I was using 60HZ on the few games that allow it was to get rid of annoying PAL borders although the Cinema (Widescreen stretch) function on the TV generally achieves this anyway.

18-01-2006, 13:53	#1
steven123 Forum Member Join Date: Dec 2000 Location: Teesside, England Posts: 2,901	Interference at 60HZ I have recently noticed that when I play a PS2 game at 60HZ I get wavy interference type lines over the screen. The picture is still perfectly visible and in colour but the interference effect constantly moving over the screen can be annoying. The picture is perfect and interference free in normal 50HZ mode. I haven’t noticed any interference effects on other devices I use with the TV e.g. Freeview or DVD Player although of course these don’t run at 60HZ. I am sure the TV is not at fault as it is a 32 inch Widescreen set and under one year old so should easily be able to handle 60HZ. The Scart cable I have been using is a RGB multi format one i.e. it has connectors for the Gamecube and X Box as well as PS2 although I only use it with PS2 as connecting other consoles weakens the picture. I have another cheapo RGB Scart lead from my old PS1 which does seem to suffer less from the interference effect but due to its low quality suffers from a pretty obvious ghosting effect. Does anyone know what could be causing these effects? I think it could be related to the Scart cable although would like a bit of confirmation before buying yet another one and if I do buy one I want to make sure it’s a high quality one that isn’t likely to suffer from these ghosting or interference effects. Any advice much appreciated

18-01-2006, 13:59	#2
elpaw Forum Member Join Date: May 2004 Location: Location: Location Posts: 7,990	It's probably 60Hz beating with the 50Hz of the power supply.

18-01-2006, 14:20	#3
steven123 Forum Member Join Date: Dec 2000 Location: Teesside, England Posts: 2,901	Quote: Originally Posted by elpaw It's probably 60Hz beating with the 50Hz of the power supply. Hmm could you explain that a little, i thought i had pretty good technical know how but thats got me baffled, i can only guess you mean the power supply frequency is out of synch with the display frequency (50HZ vs 60HZ)? Is there anything that can be done about that?

18-01-2006, 14:50	#4
elpaw Forum Member Join Date: May 2004 Location: Location: Location Posts: 7,990	It's probably not a case of the display frequency being out of synch, I assume the display frequency is 60Hz (otherwise you would have some weirder effects taking place). It's most probably the 50Hz electric power supply in all your electrical wiring in the room producing 50Hz RF waves, which are being picked up by the component cables (acting like aerials) between your PS2 and the TV. They are sending 60Hz signals, and so the 50Hz and 60Hz signals are beating. Better shielded cables will reduce this effect, although to get rid of it, play your PS2 game at 50Hz

18-01-2006, 16:41	#5
steven123 Forum Member Join Date: Dec 2000 Location: Teesside, England Posts: 2,901	Ok thanks for explaining I think I get it now. I think shielding could be a issue as both the Scart leads I have for the PS2 are very thin and probably are not individually screened like decent Scart to Scart cables are. I didn't intentionally get cheap cables but I simply couldn't find a official Sony Scart (official peripherals are generally top notch) so just had to take chances on third party ones. Anyway as I said everything works fine at 50HZ so I will keep it that way, the only reason I was using 60HZ on the few games that allow it was to get rid of annoying PAL borders although the Cinema (Widescreen stretch) function on the TV generally achieves this anyway.

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Interference at 60HZ