AT511M AT512 AT-5120.000MHZ AT-51-20M-STD-PFE-2 AT-51-20M-STD-PFV-2 AT-51-21M-STD-PFV-2 AT-5122.1184MHZ AT-5122.5792MHZ AT-5124.000MHZ AT-5124.192MHZ