Where are the random beeps?

[hung]

Got back today from one of the treasure sites where I spent the weekend.

After receiving several requests in PM to shoot a video demonstrating an actual detection of a target, I decided to finally do it tough it might be relevant only for the users of those devices as a kind of tutorial of an actual situation they should encounter when in the field.

In the video after the initial beeps at around 400 feet, and aproaching the location, I decreased gain to get closer and be able to pinpoint it. Video starts at this moment.
The target occupies around 5 feet square and it's estimated at 10 feet deep.
There are no random beeps as I demonstrate pointing the device sideways and the only beeps happen within the 5 feet square area frame.
I thought this site was perfect for the demonstration, tough I could not remain there much longer due to this being a private property and the security watcher was around. So I was in a hurry.
As you can see, the field emanations are strong causing the device's behavior resemble that of an ordinary MD.
I omitted the name and brand of device in the video as it's not my intention to turn this into a comercail advertisement. I even thought about editing this video with a black tag over the model logo, but it would take time and I decided to leave as it is.
Anyway, this is also a FG90 within a FG80 enclosure. It has a high/low gain switch toggle at the right side of panel.

Hope this helps guys.

PS. Sorry for the bad shooting. I had to hold the camera in my right hand and the device with my left one. So the view finder sometimes got on the way...
I had not the time to shoot it again for the reasons explained above.

http://www.youtube.com/watch?v=DMPbjoiyP7A