Channel Count Per Headbox: 64 Monopolar, 4 Bipolar, 2 High Level Utilizing the latest technology, SynAmps RT allows for discrete monopolar and bipolar channels, enhancing the flexibility of recordings. Additional high level inputs are isolated to allow voltage level signals to be merged with the physiological data. Linking headboxes together allows more than 500 channels to be recorded. A 64-channel SynAmps RT EEG system has one headbox, with 70 channels in total. A fully isolated, programmable bipolar excitation supply is also provided capable of supplying up to +/- 10VDC at 100mA to external bridges or measurement devices. Maximum Sampling Rate: 20,000 Per Channel all channels driven Faster sampling rates allow for more accurate sampling of the analog data being recorded. Signals such as Auditory Brain Stem Response require these faster rates, while typical ERP measures benefit from increased resolution. Sampling Method: All Channels Sampled Simultaneously Current technology eliminates the problems associated with sample and hold circuits. Utilizing a dedicated 24-bit A to D chip for each channel, the SynAmps RT enhances resolution and accuracy of each sample by ensuring a more valid measure of the data without decay or skew. The 24-bit resolution allows for even the most subtle differences in amplitude to be measured accurately. Recording Bandwidth: DC to 3500 Hz Many slow potentials (i.e., P300, MMN, CNV) have components that can only be measured accurately using a DC amplifier. DC amplifiers are also not subject to the AC coupled, filter time constant that distorts recordings after an artifact. The high frequency end of the SynAmps RT’s range allows for more accurate recording of the fastest frequencies. Active Noise Cancellation: Utilizing advanced driven reference technology SynAmps RT sets a new standard for amplifier design, both in terms of safety and signal quality. Actively sampling environmental noise, and applying an antiphase signal to eliminate that noise, elevates the CMRR to unprecedented levels. This technology also provides increased patient protection. Recording in fMRI Environments: Integration with the Micro MagLink RT System The same amplifier that is used in standard recording environments can also be used to record EEG data in the MRI by interfacing to the Micro MagLink RT system. SynAmps RT was built with enough input range and accuracy to sample both the EEG and the fMRI artifact with sufficient resolution to remove the artifact and ensure the EEG is left intact. >10 G Ohm Input Impedance: Allows standard impedance or fast preparation to be obtained SynAmps RT allows you to choose on a subject by subject basis to prepare the scalp electrode impedance to the scientifically accepted levels or to record with high impedance, due to time or subject constraints. This flexibility allows you the option to maximize your data collection for each subject and collect the best data the situation allows. Portability and Integration: Small Package, big features Digital amplifiers are typically small and thus portable, but portability also means unpredictable environmental noise. SynAmps RT has built in technology to function even in the worst electromagnetic fields. Custom solutions such as Mu metal shielding are available to ensure data quality even under hostile conditions.