Applications
RFI-9256 Radio Modem User Manual
Page 47 of 109
6.6 Broadcast Network with Back-to-back Repeaters
Back-to-back repeaters can be used in point-to-multipoint broadcast networks to extend the network range.
This scenario is shown in Figure 19.
Back-to-back Repeater
RFI-9256
Master 1
RFI-9256
Repeater
Slave 1
Main
DT
E
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 43
Hopping Pattern: 14
Rx Address: 20
PROTOCOL CONFIGURATION
Main Port: Broadcast
Main Port ARQ: 20
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RADIO CONFIGURATION
Unit is a MASTER
Network Address: 43
Hopping Pattern: 14
Rx Address: 1000
PROTOCOL CONFIGURATION
Main Port: Broadcast
Main Port ARQ: 5
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RFI-9256
Repeater
Master 2
RFI-9256
Slave 2
Main
DT
E
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 43
Hopping Pattern: 15
Rx Address: 3000
PROTOCOL CONFIGURATION
Main Port: Broadcast
Main Port ARQ: 20
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
Main Null Modem Cable
RADIO CONFIGURATION
Unit is a MASTER
Network Address: 43
Hopping Pattern: 15
Rx Address: 20
PROTOCOL CONFIGURATION
Main Port: Broadcast
Main Port ARQ: 5
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
RFI-9256
Slave 3
RADIO CONFIGURATION
Unit is a SLAVE
Network Address: 43
Hopping Pattern: 14
Rx Address: 1001
PROTOCOL CONFIGURATION
Main Port: Broadcast
Main Port ARQ: 20
SERIAL CONFIGURATION
Main Port: 115200, 8N1, Hardware Flow
Main
DT
E
Figure 19: Point-to-multipoint broadcast network with three destinations and a back-to-back repeater
Each segment of the network consists of a master that is either connected to a DTE or to a slave that is on
another segment of the network. The transmissions from master 1 will be output on the main port of slave 1,
and thus be re-transmitted by master 2. In a similar fashion data received by master 2 will be output on its
main port and thus retransmitted by slave 1 back to master 1.
