Tarenth is right. The bug with the PDS-1 has been confirmed in other
BF2142 forums and a few nights ago, I also saw is effects. The acting commander had to ask me to discourage it's use among my squadmates. I was as confused as hell, but asked my Engineers to stop using it. Then I looked up the bug in the totalbf2142 forum.
It really is a shame because it is such a useful tool that I was planning on advancing up the Engineer tree so I could get THAT, not the Pilum AVR.
It's a pretty blatant bug; I'm sure that some of the DICE people know about this by now.
Between the Support Class's personal scanner, the squad leader's recon drone and the Engineer's PDS-1, a squad has the potential to have 100% situational awareness at all times. I really hope that DICE fixes this soon so that we can use all the cool toys.