Description
This source can receive data from any FPGA running Intan's "Rhythm" firmware. It is compatible with both the Open Ephys acquisition board and the Intan RHD2000 Evaluation board.
Features
Here are the current features of the Rhythm FPGA module (from left to right, top to bottom):
- Data stream configuration - On the left-hand side of the module, there are slots for each of 8 data streams (A1, A2, B1, B2, etc.). Each row corresponds to one 12-channel Omnetics connector on the input board, and each column corresponds to one headstage on that input. Up to two headstages can be connected to each input using a dual headstage adapter. The module will automatically detect headstages that are connected. However, if you add or remove headstages after the module has been loaded, you need to press the "rescan" button. Clicking on the button for one of the detected headstages will toggle it between 32-channel and 16-channel mode. This is necessary because the difference between 16-channel and 32-channel headstages cannot detected in software, and has to be selected manually.
- Sample rate selection - sample rates between 1 and 30 kHz can be selected with this drop-down menu. This will determine the sample rate for all headstages, digital inputs, and ADCs.
- Bandwidth interface - used to determine the settings for the analog high and low cut filters on the Intan chip. Because only certain values are possible for each, the number that appears may be different from the number you typed in; the chip will automatically select the nearest value, and that will be indicated in the GUI.