Vutec RR433 Radio Frequency Remote Control - Instructions - Manual (Page 5)

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• Avoid multi-path reflections. Do not place the module near wall corners or large reflecting surfaces,
such as mirrors (the thin metal layer is a reflector), file cabinets, and so on.
• Mount the RR433 module on wood or drywall. On drywall, the module should be mounted halfway
between two studs.
• Improve RF coverage by orienting the RR433 antenna broadside to the transmitter signal, as shown
below.
CORRECT NOT CORRECT
On the RR433, the long side of the antenna should face
the direction where the transmitter is likely to be used.
The antenna should be broadside (perpendicular) to the
transmitter’s location. Do not “point” the RR433 antenna toward
the RF transmitter location.
Minimize Interference
RF reception range can be reduced by EMI (electromagnetic interference) that interferes with or masks the
desired frequency. EMI is generated by any electrical device at various RF noise levels depending on the
device. Separate the RR433 module as far as possible from sources of RF noise.
• Sources of EMI include computers, video equipment, digital processors, lighting dimmers, lighting
ballasts, motors, or any large AC source.
• Fluorescent lights cause a noticeable interference at 433 MHz.
Weak Battery on Transmitter
Check the transmitter battery.
• A weak battery can reduce RF range to 10 percent or less of normal operating range.