Instrument name: the EEG signal acquisition system

Instrument model: Neuroscan SynAmps 2 

main parameter:

Storage sampling rate: 256 guides are collected at the same time, each guide can reach 20,000 Hz;

Signals were collected synchronously for all leads;

A/D Resolution：24 Bit ；

Input impedance: 10 GOhms;

Common-mode inhibition ratio (CMRR): 110 dB;

Input noise (Input Noise.):<0.5uV RMS DC to 200Hz,<1.5uV RMS;

Standard Bandwidth (Bandwidth): DC ~ 3500 Hz;

Low-pass filter: -3 dB (3500 Hz), single pole;

High-pass filter: DC or-3 dB (0.05 Hz), single pole;

Major function:

The Headbox of SynAmps2 consists of 64 monopoles, four bipolar groups and two high level input groups, and the storage sampling rate of each acquisition guide can reach 20,000Hz. The supporting system provides coordinated synchronization of up to 4 amplifiers (256/280 guides) and ensures synchronous acquisition of channels.The carefully designed startup and time locking function ensures that the channel in the system. All channels use high-quality 24-bit A/D analog digital chips to process data transmitted to the CURRY9 computer via the USB 2.0 interface. The combination of SynAmps2 / CURRY9 provides more powerful recording capabilities and can process data online in real time.Online digital signal processing includes the establishment of multiple average modes, drawing of time and frequency domain topography, data reorganization, and synchronous removal of EKG / EOG artifacts, and so on. SynAmps2 Multilead impedance measurements can also be performed, and the investigator can see the impedance values of all leads simultaneously. In addition, online real-time spectrum analysis can be performed.