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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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