RE: Wireless Cam w/ Laptop
Interference can be isolated simply by eliminating one potential source at a time. If you believe it is your laptop, operate the laptop directly on top of your VCR, or even share grounds etc... Try to simulate the exact conditions, but with one item removed and/or shielded from the others. If it is off-air interference... use long cables to separate the devices from one another and the interference should decrease substantially. I posted somewhere in here... where I went round and round isolating an interference issue that only occurred while I was flying. Turned out to be vibrations and not RF at all. In my case it was a couple of input pots which got dirty with flow fuel and induced an AM signal onto the video input lead of the transmitter. I had to jump through hoops to find this one. It wasn't easy, but it can be done with patience and common sense. You might find the interference issue is easily remedied after you isolate the cause. Good luck.
Rob