This specification establishes the performance, design, development and test requirements for Receiver-Transmitter Radio RT-1063B/APX-101(V). The equipment specified herein shall be designed in accordance with the requirements of MIL-E-5400 and this specification, including requirements covering all operating, non-operating, and storage conditions. This equipment receives coded interrogations, decodes these interrogations and, in response, transmits pulse coded replies. Other items that are not part of this specification, but are essential to the operation of the IFF Transponder are a control panel and two antennas. The control panel may be either Control, Transponder Set C-6280( ) (P)/APX in accordance with DOD AIMS Specification 64-302, or Control Panel C-9012/APX, Control Panel Main Communications C-9015/ARA and associated BIT control panel used in the F-15. The two antennas shall be L-Band type such as described in MIL-A-25730, or equal. (Author)