Allen wrote:


I was sitting at the end of the runway waiting to do a test flight in a
customer's aircraft. He had a MFD hooked up to a Garmin 530 and TCAS.
There were several airplanes in the pattern, the MFD was giving me their "N"
number, squawk code and altitude. A T37 in the pattern only gave out his
altitude and squawk code.

Probably TIS rather than TCAS.