WTE TReX-460, Руководство пользователя

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TReX User Manual v15.30 Firmware
Serial Link Operation
The TReX is well suited for use as a wireless point to point serial link.
When TELEMETRY->MODE is set to SERIAL LINK the small back to back arrow icon is
displayed in the title bar.
Raw serial data in any format presented to the TReX is transmitted across the air and is output
from a remote TReX serial port. The behaviour of this feature is the same as if a serial wire
cable would be fitted between the units.
A typical application for this feature would be the writing information to remote LED signs.
The TReX can write to many remote units simultaneously.
In order to transmit serial characters, the TReX needs to be configured to know which ASCII
character should be used to invoke an immediate transmission (or if any), the maximum
number of serial characters to transmit at any time and how long after a period of inactivity any
buffered data should be transmitted.
The rate that data is transmitted across the air varies based on application. Typically, slower
over the air transmitted rates such as 1200 or 2400 will result in higher sensitivity of the
receiver, making the possible distance between each TReX greater. By default the
transmission baud rate is 4800_6L allowing for use on 6.25kHz channels.
The TReX will typically allow up to 234 characters to be transmitted at a time, with buffering
capability to allow several messages of this length to be queued for rapid transmission (up to
approximately 1000 characters per burst).
If the buffering capacity of the TReX is exceeded then the TReX will respond with
“FULL<CR>”.
Prior to each transmission the channel checks if TReX is clear to transmit, meaning that in
some cases transmissions could be slower depending on channel usage.
© WTE Limited, 2022 – Christchurch New Zealand
Page 217 of 302