WTE TReX-460, User Manual

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TReX User Manual v15.30 Firmware
Protocols
Serial input into and out of the TReX can be formatted differently by selecting an appropriate
protocol handler.
WT Protocol
The WT Protocol is the default protocol used by WTE products. It allows for a variety of over
the air transport methods (such as POCSAG and DMR paging) to be used and a variety of baud
rates. The WT Protocol also supports the use of macros to embed variable information in
messages such as system voltage, time etc. – see
Variable Content Macros .
Transmitting Messages
Message format:
WTNNNNNNNABC<SPACE>MMMMM<CR>
Where:
WT are the 2 characters WT
NNNNNNN are 7 ASCII digits from 0000000-9999999
A is the Transport method:
A = POCSAG Alpha
N = POCSAG Numeric
T = POCSAG Tone Only
D = DMR Text Message (directed to a group)
d = DMR Text Message (directed to an individual)
W=WTE proprietary 8 bit format.
•
2L modulations: tx is POCSAG based with forward bit correction.
• 4L modulations: tx is raw 4 level FSK with no bit correction.
B is the Level 1-9. Note that POCSAG only supports levels 1-4 which is the same as
the “Beep Level”. When the Transport method is ‘D’ this is the DMR “colour code”
C is the data rate (specified in channel width ranges):
25 kHz Channel Space Settings
0 = 512 Baud 2 Level FSK
1 = 1200 Baud 2 Level FSK
2 = 1600 Baud 2 Level FSK
3 = 2400 Baud 2 Level FSK
© WTE Limited, 2022 – Christchurch New Zealand
Page 142 of 302