Neurologger 3 has been designed to record 16 or 32 neuronal channels having size and weight similar to the second version.
Similarly to the previous generation, Neurologger 3 has an infrared receiver for precise synchronization with external equipment with the help of infrared transmitter called Neurologger Synchronizer. This feature has been complemented by Bluetooth tranceiver for remote configuring and data access.
Sampling rates are freely configurable. Two following configurations give an impression about maximal rates:
The logger consumes about 25 mA from 3.7V Lithium-polymeric battery in these modes.
Weights of the logger parts are shown in the pictures on the right. There are four types of alternative headstages: 16-channel with Hirose and Omnetics connectors, and 32-channel with Hirose or Omnetics. The scale is in centimeters.
We measured discharge curves of the following Lithium-polymeric 3.7 V batteries (capacity, weight):
|Parts of Neurologger 3|
|Dynamics of discharge of three different
types of lithium-polymeric batteries
attached to Neurologger 3
|Neurologger 3 has extremely low noise and electromagnetic disturbances, see two records below, F = 1-3300 Hz. Duration of each fragment is 1 second. A sequence of 10 μV peak-to-peak rectangular pulses was given to the input of the logger either directly (top chart), or through 1 MΩ resistor (bottom chart). The last (top) channel was connected to the microphone to recorded environmental sounds. 10 μV step is clearly visible in both records.|
|Neurologger 3 test record with low-impedance signal source giving 10 μV rectangular pulses at 5 Hz|
|The same but with 1 MOhm signal source|
Neurologger is a registered trademark.
Protected by U.S. patents #8,160,688; #9,492,085. Other patents pending.