Note that over the air testing is no longer allowed. The beacon transmits with a non emergency flag, but it still took too much processing time with the sat.
Any good avionics shop could do this test for you, and supply you with the data. For Dutch and Germany it for sure is part of their avionics test requirements.
USD 2.149,00 (can’t find the non-smiley)
http://www.sea-avionics.com/lc/cart.php?target=productDetails&model=455-9100&substring=