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Channel:
In the case of single-channel receivers, the receiver only has one channel - channel 1.
In the case of multichannel receivers the receiver has, as the name suggests, multiple
channels. The number of channels is not the same as the number of receiver outputs.
The equation below describes the number of channels associated with a receiver, based
on the number of unique channel jumpers outputs:
No. of channels - 2
No.of channel jumpers
-1
Thus, a receiver with four channel jumpers actually has 15 channels. Single-channel
devices have no explicit channel jumpers; but one may assume that there is always one
implied jumper. Channels never need to be numbered or addressed directly. Instead,
channels are better tied to the functionality they are associated with. The term channel
no longer refers to the physical output, but is a convenient way to describe the collective
functionality that a transmitter activates.
As an example, consider the case
in Figure 2. A multichannel receiver
is used to control certain functions
on a gate. The fi rst receiver output
is tied to the gate trigger. The
second receiver output is used to
activate the courtesy lights. Now,
suppose the user would like one
button to trigger the gates, one
button to activate the courtesy
lights, and one button to activate
both simultaneously. To achieve
this type of control, the user would
learn a unique button to a unique
channel that supports the required
functionality.
• Button 1 is learnt to the channel
that activates the fi rst output
only
• Button 2 is learnt to the channel
that activates the second output
only
• Button 3 is learnt to the channel
that activates the fi rst and
second outputs simultaneously
2. Glossary of Terms
S
ECTION
2
GLOS
S
ARY
OF
TERMS
FIGURE 2. BUTTON TO FUNCTIONALITY
MAPPING
Functionality
Channel-button
Mapping
Rx
01
02
03
04
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