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The obstacles will all affect the transmitted signal and typically reduce the radiated
power that will be read by the Receiver. Different objects such as walls and floors
affect the transmitted signal differently depending on the material composition, geom-
etry and thickness. Typically, most residential and light commercial construction mate-
rials do not reduce the effective transmitted signal enough to pose problems under
normal installation conditions. However, there are some installations with very thick,
dense walls, or that involve large amounts of radio frequency interference (electrical
switching rooms etc.) where the effective range of the Wireless RainSensor may be
greatly reduced.
Some helpful tips on mounting the Sensor/Transmitter and Receiver for the best
Radio Frequency (RF) performance:
• Always try to keep the antennas straight and fully extended (straight up on the
Receiver and straight down on the Sensor/Transmitter).
• Try to maintain a parallel orientation of one antenna to the other. Avoid installing
either unit where the antennas are in close proximity to large metal objects.
• Attempt to mount the units as close together as possible to reduce the potential for
interference or signal reduction. If the signal strength is not good in one location, try
another location - even as little as a few feet of movement can change from a weak
spot to a strong spot. Interior locations where cell phones or cordless phones have
trouble with reception may indicate areas with poor RF signal transmission.
• If possible avoid an installation where the Sensor/Transmitter is located exactly
above the Receiver. Move the Sensor/Transmitter slightly offset to one side. When
the RF signal is passing through walls, keep in mind that it has less thickness to
penetrate when it passes straight through the wall. In other words, passing diagonally
through a wall increases its effective thickness. Because every installation is differ-
ent, the ONLY guaranteed method to verify an installation is to physically TRY IT!
Electromagnetic Compatibility
Domestic: This device complies with FCC rules Part 15. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference and (2) this device must accept any
interference that may be received, including interference that may cause undesirable operation.
This equipment generates and uses radio frequency energy and if not installed and used properly,
that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and
television reception. It has been type tested and found to comply with the limits for a FCC Class B
computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such interference in a residential installation.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient the receiving antenna, relocate the remote control receiver with respect to the radio/TV
antenna or plug the irrigation controller into a different outlet so that the irrigation controller and
radio/TV are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for
additional suggestions. The user may find the following booklet prepared by the Federal
Communications Commission helpful:
"How to Identify and Resolve Radio-TV Interference Problems". This booklet is available from the
U.S. Government Printing Office, Washington, DC 20402. Stock No. 004-000-00345-4.
FCC ID: OF7WRS1
IC: 3949104244A
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