Repeater Mode and Addressing
Using Repeaters and Addresses in the Same System
44
SRL-35 Operator’s Manual P/N: 1003224-01
Redundant Repeater Chain
Reliability of a radio data communication system can be improved significantly by designing redundant
equipment setup for master and repeater stations. The two repeater chains are separated by proper dual
addressing setup. Slave stations need to be able to communicate with the master through the both
repeater chains. By using the "TX address auto switch" function, the slave station modem directs the reply
message to the repeater chain from which the request has been received.
If "TX address auto switch" has been set ON, radio modem checks out the RX address of the received
message. When one of the RX addresses is recognized, all the messages coming in from the serial interface
will be sent to the air with matching TX address. The use of "TX address auto switch" function is not
recommended if Repeater Function is set ON.
Local/Remote Address Compatibility with PDL Modems
If the modem has TX address ON, then primary TX address is handled in the same way as Remote address
in Pacific Crest PDL modems. The default value is 0x00FF (255 in decimal format) i.e. the broadcast
address.
If the modem has RX address ON then primary RX address is handled in the same way as PDL Local
address in Pacific Crest PDL modems. The default value is 0x0000 (0 in decimal format).
SRL-35 modem needs to have TX Delay 50ms or more in order to avoid messages from colliding in case it
is to be placed in a Pacific Crest system that uses addressing and acknowledging scheme.
Note 1. SRL-35 modems do not support Pacific Crest retransmit/acknowledge scheme. However, that has
no effect in RTK applications because they utilize only broadcast messages.
To Next Page
Loading...
