http://www.broadcastingcable.com/article/491923-Exclusive_FCC_OKs_Test_of_New_TV_Transmission_Standard.php excerpt: WNUV has six months to test from Feb. 15, when the authorization was granted, though it can seek a renewal. The FCC's Media Bureau, which granted the experimental temporary authority, makes it clear that only a small number of test devices can be used and no commercial application is allowed, both of which WNUV itself offered up as conditions of the experimental license. WNUV will conduct its test mostly in overnight hours (1 a.m. to 5 a.m.). Between those hours, it will replace its ATSC signal with the test OFDM DVB-T2 signal, receivable by only a handful of devices.