Can a DME transmit a signal?
As a part of a witnessed EMI test, I'm being asked to test DME's as a possible "source" of electro magnetic interference (EMI), and state the tested frequency. This request suggests that DME's are capable of transmitting. I always thought that they are a receiver only (though I am certainly not an avionics expert by any means).
Can anyone tell me if a DME can transmit, or otherwise be a source of EMI? If a DME can transmit, how do I as a pilot make it do that on command? Can I select a transmitting frequency for a DME?
Thanks...