CNV and readiness potential. The 0.01Hz setting of the BioAmplifier and high pass filter makes it suitable for studies involving a few channels. For larger montages, the multi-channel EEG8 system is easier to use and more cost effective. With the BioAmplifier, EL3 electrodes are plugged into the white pre-amplifier sockets, and suitably positioned at the relevant areas of the scalp. A common reference electrode is positioned on a neutral site, earlobe or mastic, plugged into the black socket. Gain is typically set to 200 or 500 microVolts scale range. The 0.01Hz filter setting equates to a time constant of approximately 15 seconds. This means that an effect which lasts for 15 seconds will suffer amplitude reduction to approximately 70% of its true value.
Nerve conduction and brain stem measures. The wide bandwidth of BioAmplifier allows measures to be made at up to 10kHz, which is sufficient for many of these applications. SAM has a 10KHz high speed mode specifically for this purpose. The PSYLAB SHK2 isolated electrical pulse generator is a suitable stimulator device.