... EAS: displaying 1000±50KHz. If no EAS tester, use oscillograph for adjustment, firstly disconnects the P5 terminal antenna ... analog line main board. 1. The 3 green LED DS1, DS2 and DS3 are to reflect the ... improve the sensitivity of test, now the green LED DS1, DS2, DS3 may twinkle; static adjustment ... required sensitivity of tag inspection, if all green LED DS1, DS2 and DS3 not twinkling (lighting), ...