User's Manual

CDR-915L OEM DATA RADIO MODULE
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Revision M INTEGRATOR’S GUIDE
8
Addressing
The radio has been designed to be very versatile in its addressing functions.
Each radio unit has its own identifier consisting of a group number and
address number.
The Source Group specifies which group of radios the unit being configured
belongs to. The Source Address specifies the address within that group that
uniquely identifies this radio. The radio will decode packets containing a
Destination Group and Address matching its own. With the exception of
broadcast messages, all others will be ignored.
Broadcast messages are those messages where the destination address is 0
and the group is the same as the radio receiving it, or those messages
where the destination address and group are both 0. When the destination
group is set to 0, all radios in all groups will decode the packet.
Likewise, the Destination Group specifies which group of radios the
transmissions will go to. The Destination Address specifies the individual
radio within that group that will receive the message.
Channel
The Channel selects the frequency the radio will transmit and receive on.
There are 62 channels available for the use of multiple networks or to avoid
interference. Radios must be on the same channel to communicate.
TX Hold Off Time
TX Hold Off Time sets the amount of time that must elapse after the last
byte to be transmitted is received by the radio before a transmit packet will
be initiated. Setting this value higher will prevent numerous small packets
from being sent when the transmit data is not continuous. The default
setting will be adequate for most applications.
Acknowledgement (Ack-Back™)
The CDR-915L has powerful, built-in path management features designed to
make OEM integration quick and easy. Activating packet acknowledgement
will virtually guarantee all data transmitted is received. Any packet
transmitted by the CDR-915L is then acknowledged by the receiving radio.
If any packet is not acknowledged, the transmitting radio will resend the