User manual

4) Click at the blank space next to the graph. A green marker will appear at

intended value. For the ease of adjustments, you may set that point close to

center of the left- and right-eye traces. Also note that a white bar at the

right end of the graph. This bar sets the upper and lower bounds for gain

and offset adjusts.

5) To adjust the gain of eye traces, place the mouse cursor outside of the

regions bounds by the white bar. Drag the mouse up or down until the span

of the upper and lower eye traces spans 8 volts. You will notice that both

the gain and offset values are updated when you drag the mouse up or

down.

6) Now, place the mouse cursor in the regions bounds by the white bar. Drag

the mouse up or down until the top of the eye trace is aligned with 4 volts

and bottom of the eye trace is aligned with -4 volts. Repeat steps 5) and 6)

for fine tuning.

7) Once you are happy with the adjustments, don’t forget to unselect the “SEL”

buttons on the “Adjust” button so that you will not accidentally touch the

adjustments.

8) Now your “Calibration” is done. Click on the “Pause” button to continue

recording.

Figure 2-11. Gain/Offset Adjustment in the Plot View

2.4 Status Panel

The Status Panel allows users to monitor the status of the camera image of the

tracked eye throughout the setup, calibration, validation and recording phases

40 EyeLink 1000 Host Application