User's Manual

SATELLINE-M3-TR1
User Guide, Version 3.0
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5.7.3 Configuration by using SL commands
“SL@S=” command selects the compatibility mode:
o ”SL@S=0” sets SATELLINE-3AS (default).
o ”SL@S=1” sets PCC-4FSK
o ”SL@S=2” sets PCC-GMSK
o ”SL@S=3” sets TRIMTALK GMSK, RX fitted to Pacific Crest transmitters
o “SL@S=4” sets TRIMTALK GMSK, RX fitted to Trimble transmitters
o “SL@S=5” sets PCC-FST
The modem responds with “OK” message if the requested mode is supported or “ERROR” if the
mode is not allowed.
“SL@S? enquires the active mode. The modem responds with a number:
o “0” if the mode is SATEL 3AS
o “1” if the mode is PCC-4FSK
o “2” if the mode is PCC-GMSK
o “3” if the mode is TRIMTALK GMSK, RX fitted to Pacific Crest transmitters
o “4” if the mode is TRIMTALK GMSK, RX fitted to Trimble transmitters
o “5” if the mode is PCC-FST
5.7.4 Settings
In order to use the Pacific Crest/TRIMTALK modes implemented in SATELLINE modems:
PACIFIC CREST modems must have:
o Protocol Mode =
o Transparent w/EOT Timeout (when using Pacific Crest modulations)
o TrimTalk 450s (when using TRIMTALK GMSK modulation)
o Modulation Type depends on the system
o GMSK (default, always selected when using TRIMTALK 450s mode)
o 4-Level-FSK
o FEC = ON
o Scrambling = ON
o Data Security Code set to = 0 (=not used)
o Local Address= 0…254 (0 by default)
Pacific Crest modem receives messages from SATELLINE modems that have their TX1
address matching the Local Address.
o Remote address=0…255 (255 by default, that is the broadcast address to be received
by all). SATELLINE modems receive the message from a Pacific Crest radio, provided
their RX1 address matches the Remote Address of a Pacific Crest transmitter (or if the
message has the broadcast address 255).
SATELLINE modems must have the following key settings:
o FEC OFF (because the FEC here means SATEL 3AS FEC, not Pacific Crest/TRIMTALK
FEC )
o Error check OFF
o Full CRC16 check OFF
o Radio Compatibility (according to selected Pacific Crest protocol mode setting)