On Monday, June 8, 2015 at 4:54:11 AM UTC-7, wrote:
Flarm needs a box that is similar to that used by A&Ps to do transponder checks. Something portable that would allow you to test the send and receive range of your glider on the ground. Idally you would do sy 4 tests. Off the nose, behind, and left and right.

Range analysis tool is ok, but it's really pretty useless if you're trying to diagnose a problem.

If there were 10 of these boxes available in the US, I'd happily put down a significant deposit on the box and a reasonable rental to be able to check not just my glider, but all the gliders at my airport before returning the box to get my deposit back.

Doesn't Flarm broadcast in the blind all the time? There is plenty of test equipment available to test the field strengths of transmission. Not as cheap as the Portable recommendation, but probably more accurate. Look around your area for a lab that does EMI testing.