SATELLINE-3AS and SATELLINE-3ASd
23
In a system with several adjacent repeater stations addresses should be used. This prevents
circulation of the message and secures that only the determined radio modem receives the
message.
All radio modems should have RX addressing set on and TX addressing set off. The base station
and substation terminals add a chain of addresses to the beginning of the data sent to radio
modem on the RS-line. Addressing is used in the following way to route a message:
R1 ADD R2 ADD S ADD
DATA
- the message from the master station terminal that contains the addresses of the repeater
stations (R1 ADD, R2 ADD) and the substation (S ADD ). Every address is two characters long
R2 ADD S ADD
DATA
- the message from the repeater station 1 to repeater station 2
S ADD
DATA
- the message from the repeater station 2 to sub-station 4
DATA
- the message received from the RS-line at the sub-station 4
The string of addresses is created in the same way when the substation replies to the base station
but the routing is in the opposite way :
R2 ADD R1 ADD M ADD
DATA
-R2 ADD is the address of the repeater station 1, R1 ADD is the address of the repeater station 1
and M ADD is the address of the base station
