Spartans are also adept at being programmers, hackers, and mechanics, so it may not be that far out of the question to create a basic mechanism that could receive the signals; and possibly transmit a series of messages upon receipt (more advanced technology and programming advances for that), though Daisy could also "order" a radio silence on its' location once the droids begin to arrive.

It'd need a laptop and a few resources to set up, but she could try it. The disadvantage would be in that the fake signal wouldn't be mobile, so things would probably seem off to the Malnosso the moment they noisily approach without a single hint of mobility.