Security Camera Interference

"Could it be interference from the satellite dish?"

Unless the dish was installed six weeks ago, I would rule the dish out.

Do the cables from the two problem cameras run together at any point back to the head end?

Have you installed any new equipment/appliance anywhere along the camera cable route or adjacent to the cameras?

Are the cable connections secure at the two cameras and head end?

Have you swapped around the camera inputs at the head end thus ruling out head end equipment malfunction?

My way of thinking is that if two cameras are experiencing this, it has to be a related issue.

I don't have much more than this but at least it is a place to start.

Post back and let us know what you find.

Thanks for the info. I'll have my son check it out. I have another question. Could the hard drive in the DVR be going bad?

The six week theory is basic troubleshooting, and quite right! What else might have happened within that time frame. Don't rule out the neighbors, if any.

In engineering there is no miracles. Everything has an explanation which we either know or not yet. Try put the thing in a logical sequence, one by one.

When you first installed the cameras were there any interference? day or night? I presume no.

How long ago the interference started, and what changed at the same time? You mentioned on the first:six months, but at the second?

Sat dish is a receiver (I presume it is not an up-link as well) and as such it cannot create interference, unless you go around the focal point where the E-field is strong and could induce interference even to standard coaxial cables (remember the shielding is no more than 94 98% at the best at std coax, only to 'heliax types etc can reach to almost 100%). So if your cables did not go 'loose' near the dish focal point, no-way the interference comes from the dish.

Last point to consider the 'neigbhours'. Many ways to create interference from many appliances, even from wireless internet, the most innocent one. Have you tried shielded cables? (beware of 'ground loops', which may make the situation worse).

As a last solution i would consider filtering, depending on your engineering level and equipment resources, or an alternative route of cabling.

Good luck