Remember that to be able to "see" someone on your radar, your scan precision must be lower than their signature profile while they are within range of your scan radius.

If anyone of these should be no with tolerance, then the littel scout sneaks up on you and knifes you in the back.

They nerf scan range to 5m ....

No, crouching also not affect your signature. Weapons doesn't have signatur at all.

Yes, and structures from this build lower your signature as well, but If you are standing at corner of the building someone may "pick you up" on his radar if he doesn't see you.

I don't know do deployed equipment have some signature in this build. But it can be picked be active scanner, so probably yes.

PS
what Spacetits CDXX said

Maxed skills, complex range module on a light suit.

Nothing on the scanner and then someone kills me at point blank range. Seems broken.

I tried out the 'Hunter Scout' featured fit, and really enjoyed it, so I made scanning scouts a cornerstone of what I did in Chromosome, then specced into scout suits first for Uprising.

This definitely doesn't work as well as it used to. The first thing is that the scan radius has been leveled across all dropsuits; it used to be higher for scouts than any other, but now all the suits I look at have their radius set to 10m. If I remember, for the old scouts, it was 25m before adding modules, and even militia modules/fits caused a noticeable improvement in sensor strength. The role bonus now does not make up for the difference, and unlike before, I pretty much only sight my targets visually rather than following them on radar.

Once upon a time, I used to be able to stalk people with this setup... using radar to see which way enemies were facing and going and staying out of sight until I attack, at the risk of having my wimpy scout suit knocked over once I tried. I'd also be able to hang back from a group of teammates and highlight groups of enemies for them to attack. Now I pretty much can't do that at all and the fun has been sucked out of this style of gameplay, into which I'd sunk lots of SP.

I played scout in Chromosome and I believe it only scans what is in the "cone" directly in front of you, as portrayed on your radar. And the scanner appeared to work in pulses. So it sends out a pulse and if you pick someone up they lightly appear as a blimp for a split second, then fade away until the next pulse.

Now I may have been seeing things or whatever, but that is at least how it appeared to work for me last build.

Appia's Skills: Profile Dampening 5, Precision Enhancement 5, Range Amplification 5, Gallente Scout 5. . . on a 10m base scan range becomes a scan radius of 20m. 2 complex range amplifiers increase that to 29m (50%+50%+45%+45%) or more if calculating points works differently.
45 dB Sig Radius. Scout and Dampening get it down to 30 (rounding up). 2 Complex Profile Dampeners get it to 7 (rounding up). (-10%-25%-25%-25%)
Scan Precision of 45 dB. 10% from skill. so 41, 20% from 1 complex precision enhancer becomes 32.

So by this, The only people can can pick up my suits would be someone invested in precision with 4 precision enhancers...
or Line of Sight.

The new Active Scanners are cool. they straight-out tell you the 3 most important things: Range, Precision, and Angle.
We can calculate our range and precision, but they have never released the passive scanner's angle. it should be 360-¦ and less than 120-¦ means it isn't helping.

So the basic Active scanner can't find Light frames. much like heavies, logis and Assaults. the ADV scanners have a precision of 36... still can't see me. The prototypes have a 28, with the most expensive at 15... none of those can find me.

Yet somehow, I was playing a skirmish and a heavy found me. I was watching him, making sure I was always to his backside or at the very least behind cover. He hunted me down like he knew exactly where I was, no dumb luck involved, he knew exactly where to go.

The new "enhanced graphics" took away my ability to snipe. It took away my ability to find targets, light them up with the SR and give tactical advice to my team. The messed up controls and input-lag have made it impossible for me to use my scrambler pistols effectively... So I'm out in the game reduced to 2 Toxin SMGs (because I spec'd into Scanning, Scout, SR, and Scrambler Pistol), with the goal of running around and hacking things in OMS/Skirmish, and taking out any campers as I cause hit-detection problems by jumping around or circling people faster than they can track (which, to be fair, I can't keep up with 100/100 sensitivity either)

Well my logi proto suit seems to pick people up in buildings and such.

So either you need to upgrade your suit or skills.

True, it seemed to be more effective in that direction, but with maxed skills I used to pick up people beside and even behind me if they got close enough -- even scouts if they hadn't skilled for stealth. Now I get no warning even when there are 3+ mediums breathing down my neck and I doubt *everybody* are wearing profile dampeners (also dropsuit command no longer lowers scan profile so they should be easier to detect now).

Couldn't really say with the gimped range we have now. I know it has failed to pick up enemies until I turned a corner and found myself face to face with them (again, not other scouts). They *should* have been within my scanner range before I saw them, and unless the scanner angle is extremely narrow they should have been within the scanner field too.

Also, it's not like I know for certain that the scanner really was more efficient in the direction you were facing back in Chromosome, or how wide the angle was if that was the case... or what, other than the range, was changed in Uprising :P.

Sometimes enemies have (briefly) remained visible on the scanner even after they've moved behind cover. No idea if it was because someone else on my team had them in their LoS for a second or two longer, the scanner was just laggy or if it was actually tracking them until they got out of its very limited range...

idk, i'm not a scout, but i spent some points on passive scanning, i can see drop uplinks from miles but it seems that everybody can see them, surely the passive scanning is not working on the mini map, does it work on the screen ?
I can't believe everybody have spent points on damping....

Interesting effects: On Skim Junction, where you get that giant planetary defense gun with the 3 rings, I was walking along the outside of "B." Without line of Sight, I did pick up a Heavy Frame suit that was coming towards me. He too was circling the wall so I was indeed able to see his marker on my tacnet through the wall.
At the same time there were enemies near "B" n the otherside of the wall. They were lit up because they were engaged in combat, but then my bluebies messed up royally and lost a 6 on 3 battle so the chevrons disappeared as their names showed up on top in the kill list.

Ric, are you sure of your scan radius? That is that first circle on the radar is only 10m, then each score after is 5m.

my low slots in my Gallente are 1 mlt kincat (such a huge SP tax on that now) 1 STD armor repairer, 1 complex profile Dampener, and 1 Complex Range Enhancer. so my scanner picks up things within 24.5m

I have also picked up someone that was within the 24m radius who was up above me on a platform. The helipad looking structure. I was on the backside of the structure while they were on the front side... that was actually the heavy who hunted me down.