The jammer has to be between the sender and receiver... not going to happen. Remember that this cannot intercept sat comms which is what the Predator & Reaper use (any uav with a bulbous nose.
not necessarily true re bulbous nose, the assumption (and probably correct, and in the pic shown demonstrates state ) is that the sat gear is under the cupola as its the most likely spot as the bulk of the gear is serviced from one location for ease of maint.
however, the uplinks don't need to be under the cupola, eg the Beast has various uplinks scattered around its body
a sat uplink can literally be the size of a kiwi fruit (cut in half)
my academic concern is that when we assess comms gear or any gear that is part of a data migration/transfer loop, we have to clear it via a number of sanity and security tests. they are normally tested for external hooks, corruption of the links, and if tactical, issues of jamming and spoofing. the sign off for acceptance means that these systems have to comply with a number of predetermined safety and system reqs.
Perhaps these were fielded because vid feeds are regarded as benign, but there is a fundamental principle that you don't give away info unless it is for a tactical purpose (eg as was done in GW1 and GW2). Theatre systems are also supposed to be set up so that someone knows if they are being probed or harvested.
As benign as these feeds may have been, I have some fundamental concerns that any comms active system was fielded without having what would normally define accreditation for going gold having been considered, let alone done.
