Tempe, Ariz.-based Comtech EF Data Corp. announced yesterday that it completed operational testing in conjunction with L-3 Communications NARDA Satellite Networks (NSN) and XTAR. Conducted at the Joint Interoperability Test Command in Indian Head, Md., the tests assessed the performance of Comtech’s SLM-5650 satellite modem, L-3 Communications’ ground multi-band terminal system and 3.9 meter-transit-case quad-band antenna, and XTAR’s X-band satellite system.