I'd ask the German federal police about this. After all, counter-intelligence against foreign state agencies is their bread and butter... (/snark)
Not even military. Germany has foreign and domestic intelligence agencies - the Bundesnachrichtendienst (BND) and the Bundesamt für Verfassungsschutz (BfV), respectively. They don't need the po-po's helicopter to check for antennae. They already know or can reasonably guess what intercept equipment is on-site at the consulate (and other sites).
If this stunt's goals were any more transparent, birds would be smashing into them with the frequency of that Hot Butter song.
What I'm looking for is an actor-well-past-his-prime-and-forced-to-do-crappy
Or maybe a Bobcat Goldthwait PVR. Something to use in my Evening At The Improv shrine.
Come on, engineers. Give us something we REALLY want.