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5
Contention Considerations
It is important to understand that even though the transmitter uses a
frequency hopping protocol, it is still possible for interference to interrupt
the transmissions. While the transmitted signal consists of encoded digital
data, only one carrier of any particular frequency can occupy airspace
without contention at any given time. If two transmitters are activated
in the same area at the same time and on the same frequency, then the
signals will interfere with each other and the receiver will not see a valid
transmission, so it will not take any action.
Battery Replacement
The remote unit utilizes a CR2032 lithium button cell. In
normal use with five 2-second activations per day, the
battery provides over two years of operation. To replace
the battery, remove the access cover by pressing firmly
on the label area and sliding it off. Once the unit is open,
remove the battery by sliding it from beneath the holder.
Replace it with the same type of battery while observing
the polarity shown in Figure 7.
There may be the risk of explosion if the battery is
replaced by the wrong type.
Battery access
Figure 7: Battery Access
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Summary of Contents for HumPRC HUM-900-PRC
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