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1892 1335 - Orion Radio Modem Operating Instructions - v1.3 / Aug 2006 15
TS is the basic two-way link for asynchronous RS232 data. It has no error correction.
TU also provides a two-way asynchronous RS232 data link, but it has Feed-forward
Error Correction (FEC) so that many errors can be corrected.
TP provides a two-way asynchronous RS232 data link with both FEC and requests for
repeat transmission of corrupt packets to provide an error-free link.
TRR
TSR
TUR
configure a modem as a simplex repeater, retransmitting received data to extend
the range of the radio link. They are used in conjunction with the corresponding
TR, TS and TU modes. (Repeater mode is not available for mode TP.)
Several repeaters can be used in the same network, because the repeater will only
re-transmit the same message once if received several times.
Telemetry Options
These modes communicate only telemetry information, not user data.
TMR
TNT
The simplest telemetry link is where the inputs at one end are mimicked at the
other end. By configuring the master station as TMR, and the outstation as
TNT, the inputs at the outstation are relayed to the master’s outputs.
TMX
TNX
This is a similar link, but two-way. By configuring the master station as TMX ,
and the outstation as TNX, the inputs at either end are relayed to the outputs at
the other. Hence this could be used for control as well as data acquisition.
TOM
TOS
This configuration allows one master to control and acquire data from many (up
to 255) outstations. The master is configured as TOM, and each outstation as
TOS, with an ID number so that it can be individually addressed. External
equipment (the GUI for example) is needed at the master to supervise the
operation and receive data. The master’s telemetry inputs and outputs are not
used.
If a repeater is needed for any of these modes, configure it as TUR.
Combination Options
The Orion is capable of passing both user data and telemetry information between the
outstation(s) and the master.