... EAS System ,Anti-theft Alarm TEC-9509 SpecificationsTEC-9509 is debugging-free type, its operation is simple, and its anti-jamming function is ... ±500KHzModulation frequency 150, 160, 170, 180Hz 2. Setting and debugging of T04 transmitter 1) There are 4 routes of ... changing the transmitter’s modulation frequency 150, 160, 170 and 180Hz, to let each transmitter have different modulation frequency, so ...