My last 3 campouts in the stand were all lonely looking to try out my Thor. Finally...
I was just starting to wake up and start the deer watch when the feeder alarm goes off, get out the monocular and see the crowd below. It was 6AM and while I could see the feeder @ 100yds, I couldn't see the hogs, feeder/driveway alarm is the ticket.
I thought I hit the first one, but didn't find it. That was my first time shooting at one on the run, after the second shot I remembered that thing called "lead". Saw the second one tumble. Biggest hog I've ever shot. Given her size and it's the holiday season, I made a donation to the the "Hunters for the Hungry Coyote Thanksgiving Food Pantry".
It is ad odd phenomenon (primarily) with thermal units where the horizontal line does not show up consistently (or virtually never on some units)on the recordings. The result is that is makes many of the reticles look really hokey, but that isn't what the shooter is seeing, as Charlie indicated. I find it really annoying as the later viewer isn't really seeing what the shooter saw, but that is really just a minor consideration. It is currently just the state of thermal units right now and happens to all of us who record with thermal.
I know there are a couple of theories as to why this happens, but nobody has seemed to be able to keep it from happening.
The problem is that the clock sample rate of most all video recorders is too slow to catch the pixel data of the reticle. I have looked at the video data coming out of my IR defense units and the reticle data is one pixel width wide meaning that the data is only 82.5ns wide. You would need a video recorder with a minimum of 24.24 MHz sample rate to guarantee catching all the data coming out of the video output port. Most of these portable recorders sample somewhere around a maximum of 9 or 10 MHz sample rate so parts of the reticle are never captured, horizontal or vertical portions. In short the reticle data gets under-sampled. As another topic the video output out of the IR Defense units only has a 6 bit resolution, 64 steps white to black, which is why the recorded data looks a bit grainy in comparison to what you see in the eyepiece display of the unit. You need at least 8 bits, 256 shades of grey, to resolve this issue.
Good job Charlie. Glad that Thor is getting it done for you!
My feeling is on the reticle recording deal is it has more to do with the recorder or the cable than the thermal output itself. I've tried it on many thermals and most tend to do it. It's not always the case though and I've had good luck changing reticles and getting a good output. For example, my Zeus pro sometimes leaves off the horizontal cross hairs and sometimes it doesn't but it's usually pretty consistent with the tactical type reticle.