nulling help

[Anonymous]

could someone explain what nulling is and how it relates to threshold, im really stuck on this one.should i hear the thresh or not.and whats falsing

 

[Anonymous]

The threshold should be adjusted just to the point where we hear a slight hum as a general rule.
The Explorer uses threshold null discrimination which means a rejected target causes the threshold to go silent. The time the threshold is silent is a null.
A false signal is when you hear the audio increase but cannot find any target that has caused the increase.
HH, Cody

 

[Anonymous]

And it nulls out only over the area you have disced out.
I believe if your screen is wide open then there are no nulls.

 

[Anonymous]

Tony,
I find that even after passing over a target that produces a good target response, there will be a short null produced. It is so short that it is barely noticeable. I do not think that this is very important, but just an observation on my part
HH,
Glenn

 

[Anonymous]

I have also noticed that but thought I would do something different and not do my normal page and a half on null and false signals. You are an engineer so know there is a lot more to the threshold, null, and false signals.
Also, I very much enjoy your comments.
HH, Cody

 

[Anonymous]

I have a question. I always thought that nulling was when the threshold when silent. In areas where there are a lot of targets, I have experienced the threshold going silent with just targets coming one after the other, without the detector ever recovering to the threshold. Is this called nulling too?
rgds, bing

 

[Anonymous]

and I have experienced areas where the nulls block out the threshold for seconds at a time. I never use any disc and hardly ever use IM.
Now I run my sens at levels that avoids this excessive nulling and it seems to be working just right.
rgds, bing