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Black image noise.

 
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deronmoped



Joined: 03 Nov 2006
Posts: 1118
Location: San Diego


PostLink    Posted: Fri May 31, 2019 6:05 am    Post subject: Black image noise. Reply with quote


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So I noticed that when viewing a black image from my G90, that there is some noise in it. It's kinda like radio static, very faint random and blotchy. I figure it could be coming from a dozen different places, such as, the HTPC, the RGBHV cable, outside source... Any ideas which is the most likely source?
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Tim in Phoenix



Joined: 21 Oct 2006
Posts: 4169
Location: Phoenix


PostLink    Posted: Fri May 31, 2019 12:10 pm    Post subject: Reply with quote

Say Deron

Look into each lens. Is it one tube or all? Raise the brightness a little, does that affect it? Make a shorting plug on a BNC connector and try that on the RGB In ports. Do you see it on internal test patterns? Is it just on satellite or just on BluRay?
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deronmoped



Joined: 03 Nov 2006
Posts: 1118
Location: San Diego


PostLink    Posted: Sun Jun 02, 2019 2:21 am    Post subject: Reply with quote

I will give those things a try.

So the shorting plug is used on R,G then B? And look to see if that eliminates the noise?
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Tim in Phoenix



Joined: 21 Oct 2006
Posts: 4169
Location: Phoenix


PostLink    Posted: Sun Jun 02, 2019 2:22 pm    Post subject: Reply with quote

deronmoped wrote:
I will give those things a try.

So the shorting plug is used on R,G then B? And look to see if that eliminates the noise?



Right. If it is RF leaking in it might ground it out. Helps determine if it's a problem in the G90 or something external. Try also shorting the source end of the coax cables, if you are using coax.
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