... modulation signals of 150, 160, 170, 180Hz on the panel of T04 transmitter, which can be selected for using, ... selection. If to change the modulation signal on the panel of transmitter, it needs to regulate the frequency sweep ... adjustment, firstly disconnects the P5 terminal antenna on transmitter panel, set the JP1 on 1&2. Connect the probe ... shall be greater than 10M. TEC-520 EAS Security System