SR Research
Fast, Accurate, Reliable Eye Tracking
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Host PC I/O Cards

Analog Card

analog card
The Analog Card accessory for the EyeLink system is used to output eye position and pupil size data as analog voltages. The native digital EyeLink eye data is converted to 16 bit analog signals in real-time using hardware interrupt driven processing. This ensures an extremely constant output duration for each analog sample.

The Analog Card also features 16 bits of digital input / output, which can be used for the TTL triggering of recording start / end or synchronization of the digital eye data file with external devices.

Parallel Port Card

parallel port
This Parallel port card supports the various Parallel Port Reponses Boxes that SR Research offers. The card is useful if the Host PC motherboard parallel port is going to be used for TTL type applications. The Parallel Port Card is not necessary if the Analog Output card is being purchased.