NTS-2000A is a trolley EMP/EP system which has EMG, SEP and NCV examination protocols. The pre-amplifier has 2 or 4 optional channels which can be updated to 8 or 16 channels. NTS-2000A has a modular design which makes transportation and maintenance much easier. It also reserves the magnetic stimulation interface. The operation panel and footswitch provide an easy and fast operation of the system. NTS-2000A has a fiber optical transmission and preeminent anti-interference capability. The system is utilized for EMG testing within medical institutions. It deals with the examination protocols for electromyography (EMG), motor unit potential (MUP), interference phase (IP) and scanning EMG.