User`s manual

Cerebus® User’s Manual
Revision 13.00 / LB-0028 Page 27
Front-end Amplifier Inputs
This window will allow the user to set different properties of a specific channel or a group of selected Amplifier
channels.
Figure 22 - Analog Input Properties
o Label: A user-defined name for the specific channel. When configuring a group of channels you can label them on a
global basis by clicking the Edit button.
o Digital and Analog Range: Fixed values for informational purposes.
o External Gain: Set the gain to match the headstage gain value.
o Raw Data: If selected, an NS6 file containing full bandwidth data without any digital filters sampled at 30 kHz is
created.
o Amplitude Rejection: Rejects any waveform that falls outside a user-defined amplitude.
o Spike Extraction: When enabled (default), the system will display the spike-triggered events. Use the drop down menu
to pick a digital filter as described in Digital Filters on page 22.
o Threshold Method: This determines the method used to extract spikes. If Level is chosen, the waveforms crossing the
Threshold Value will be extracted. If Auto is chosen, the spike extraction is automated as described in Auto
Thresholding on page 35.
o Sorting Algorithm: Sets the sorting algorithm for a channel as described in Sorting Algorithms on page 21.
o Continuous Acquisition: By enabling this option, the NSP records continuous waveforms. Use the drop down menu to
pick a sampling rate, as described in Sampling Rates on page 21, and a filter, as described in Digital Filters on page 22.
o Line Noise Cancellation: This enables the line noise cancellation (LNC) filter. With the LNC filter enabled, you can set
the time constant in the drop down menu to adapt to the 50 or 60 Hz line noise. A time constant of 10s is the default
and recommended setting. However, you may set the time constant from 1s to 60s, instantaneous or to hold.
o Reference Electrode: In addition to the hardware reference, this selection allows you to specify a software reference
electrode. The software reference can be applied to either the raw data stream which affects both LFP and spike data, or
it can be applied to only the spike data stream.