Spread Spectrum Wireless Data Transceiver User Manual
S
CRIPT
F
ILE OR
AT
COMMANDS
The following lists the commands available to use in Point-to-Point Slave/Master Switch able operation
mode and the functions the command controls.
Script File or AT Command
Function Controlled
ATXF Frequency
Key
ATXT
Max Packet Size
ATXD
Min Packet Size
ATXX Transmit
Rate
ATXR
RF Data Rate
ATXP
RF Transmit Power
ATDT
Position in Call Book to Call
ATD
Allows a specific FreeWave Serial Number to be entered to call
ATXC
Used in conjunction with the ATD command, instructs
transceiver which Repeater path to follow
ATXS
Instructs transceiver to go into Setup Mode
In general, the AT-commands supported by the transceiver can be divided into two types:
S
ETTING
commands result in changes on the local transceiver.
ATXF_, ATXT_, ATXD_, ATXX_, ATXR_, ATXP_, or ATXS
C
OMMUNICATION
–
L
INK
commands result in the transceiver trying to establish the communication links
with other transceivers.
ADTD_ , ATD_ or ATXC_ in conjunction with the ATD_
Transceivers react differently to the two types of the AT-commands. After receiving a Setting AT-
command, the transceiver will process the command and, when finished, it will remain in the Point-to-
Point Slave/Master Switchable mode.
Conversely, if the Communication - Link command is sent to a transceiver, it will process the command
and, when finished, will change its mode of operation, which in simple terms can be best described as a
Point-to-Point Master-like mode. In this mode the transceiver will not react to incoming AT-commands,
however, it will transmit them across the RF link as user’s data. The transceiver will stay in this mode until
its DTR line is de-asserted.
In order for a transceiver to accept any AT-commands, its DTR line must be asserted. However, the DTR
line has to be held asserted for different time durations depending on which type of command is given.
Follow the steps below to assure the proper functionality of a transceiver in Mode 6 operation.
For
Setting
AT-commands:
1. Assert the DTR line on transceiver’s data port.
2. Send the AT-command(s) to the transceiver on the Data Receive Line.
3. De-assert the DTR line after the transceiver responds to all of the AT-commands sent to it.
4. Repeat from Step 1, if needed.
For
Communication - Link
AT-commands:
1. Assert DTR line on transceiver’s data port.
LUM0002AD Version
6.1
21
