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Appendix A: Plastic Window Location and Size When Using
Front Metal Mask
If you chose to use a metal front mask (with holes in the LED locations to allow the
LED’s to show through), you must provide a plastic window for the radar beam to pass
through. Use the drawing below for the recommended location and size for the plastic
window in your metal mask.
The cutout in the PCB in the center of the figure is the actual size and location of the
integrated DR600 radar. The dotted and dashed larger rectangle is the suggested window
size.
The suggested window is larger than the actual radar because the radar waves diverge at a
9x18
angle from the face of the radar. The recommended window size is for a metal
mask within a few mm from the top of the LED’s. If the window is materially further
away from this position a larger size window may be required.
Note: the cone cutout is an on-board light sensor. The light sensor is used to adjust the
brightness of the LEDs based on ambient light conditions. You must allow ambient light
to reach this sensor. Alternatively you may provide an external light sensor wired to the
AUX connector on the front of PNL18. Contact Houston Radar for more details.
Dimensions in mm [Inches]
