Tech Spot:
Secondary Analog and Digital Inputs into the Digital Lynx SX

Neural signals are not the only signal of interest for experiments.  For example, a researcher may be interested in a specific electronic component or eye movement made by the research subject and have the data displayed and recorded alongside neural activity (analog input).   Another case, a researcher may want to know exactly when a stimulus turned on or off, and compare this with neural activity (digital input).

Analog inputs can be received by the Digital Lynx SX in several different ways, including: breakout boards, breakout cables, directly through the EIB, or BNC Panel 32 Input.  Each method has its advantages.  All analog inputs will be synchronized with neural inputs for display and recording; hence, they will count toward the available 32 A/D channels per Input/DRS board.

1.  MDR50 Breakout Board:  Using the breakout board allows signals to be input directly into any A/D channel of the Input Board/DRS boards and bypass the headstage.  Biological signals with low voltage (within Digital Lynx SX's +/- 132mV range) that do not need to be buffered are good candidates for the MDR50 Breakout Board.

2.  EIB:  If buffering the signal is preferred, the signal can be brought in directly to the EIB, passed through the headstage for input to the Input/DRS boards.  Again, the signal must be within Digital Lynx SX's +/- 132mV range.  High impedance signals with low voltage should be input this way.

3.  Custom Breakout Cable:  For signals that do not fall within the input range of the system (+/- 132mV), a custom breakout cable can be made that will attenuate the higher voltage signal down to the required level.  Secondary equipment, such as eye trackers, have much larger voltage output, typically around 5V, and a resistor is needed to bring the signal level to within the Digital Lynx SX input range.  A custom breakout cable also provides the researcher with configurable input connections, such as BNC or barrel connectors, as well as adjustable cable length, that allow for easier connection between the Digital Lynx SX and the secondary equipment.

4.  BNC Panel 32 Input:  For many additional analog signals, a BNC Panel 32 Input panel provides researchers with 32 inputs, each with its own BNC connection.  This method allows for an entire Input Board to be dedicated to external analog inputs.  Each input can be made to attenuate higher voltage inputs down to the Digital Lynx SX input range, similarly to the Custom Breakout Cable.

Digital inputs can also be routed to any of the four 8 Bit TTL I/O ports of the Digital Lynx SX in different ways, including: Direct wiring  2-Pin BNC with or without a Carrier, or BNC-Panel-16-TTL.  All methods work the same and the digital signal will be synchronized with neural input and marked as an event with a time stamp.  This will not affect the analog channel count. The TTL I/O ports can also be used to output a TTL to an external piece of equipment.  Both the input and output of the TTL I/O work on a 5V, high-low or low-high transition.

1.  2-Pin BNC:  Provides the easiest means to input or output a TTL from the Digital Lynx SX.  This provides a BNC connection to the external device.  A 2-Pin Carrier is also available for easier connect and disconnect of multiple 2-Pin BNC cables between the Digital Lynx SX and accessory equipment.

2.  BNC-Panel-16-TTL:  Provides researchers with 16 TTL I/O connections to the Digital Lynx SX via BNC connectors.  This panel connects directly to 2 of the 4 TTL I/O ports on the Digital Lynx SX.  This device is ideal for users with multiple accessory TTL controlled devices.

Neuralynx does offer custom solutions to scenarios outside of these examples.  Please contact or for more information.

Shirts for Papers Campaign

See this months featured paper:

"Receptive field dimensionality increases from the auditory midbrain to cortex"

Craig A. Atencio, Tatyana O. Sharpee, and Christoph E. Schreiner

Each month, Neuralynx will highlight a paper or presentation by one of our customers on our website. Submit your paper or presentation which references any Neuralynx hardware, and receive a free Neuralynx polo shirt. Contact for more details.

Please see previously featured and upcomming papers on our website at

Visit Neuralynx at the 45th Annual
European Brain and Behaviour Society Meeting

September 6th - 9th
Ludwig-Maximilians-Universität München
Munich, Germany

New RMA Procedure

Neuralynx has improved the process for issuing RMA numbers to customers that need to return a product for evaluation. This new method will help expedite the evaluation of the device to ensure a prompt turnaround time. Simply fill out the form located at, and one of our Neuralynx Support Representatives will contact you shortly with a RMA number.

As always, feel free to call us to be issued an RMA number over the phone.

Additional Questions
Don't forget to check out the Frequently Asked Questions section on our website. Still need answers? Please email or
for assistance.
Neuralynx has launched its MATLAB User Group.  This repository, consist of MATLAB scripts geared toward your research.  The goal is to provide you additional MATLAB options and  analysis flexibility.  Please visit our MATLAB Development page for more information.  If you have any requests for specific utilities or, if you would like to submit a MATLAB script, please email: 

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