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RS‐232/485 RF Modem Product Manual – MAN0782‐02
BD (Baud Rate) Command
BR (RF Data Rate) Command
BT (Guard Time Before) Command
<Serial Interfacing> BD Command is used to
set/read the interface data rate (the rate at which
serial data is sent to the modem from a host).
Newly modified serial data rates do not take effect
until the modem exits Command Mode [refer to
CN (Exit Command Mode) and CT (Command
Mode Timeout) Commands].
The BR (RF Data Rate) Parameter is not affected
by the BD Command.
Note: If the serial data rate is set to exceed the
fixed RF data rate of the RS-232/485 Modem,
flow control may need to be implemented. Refer
to the Flow Control [p17] and CS (GPO1
Configuration Command [p36] sections for more
information.
<RF Interfacing> BR Command is used to
set/read the RF data rate (rate that RF data is
transmitted over-the-air) of the modem.
<Command Mode Options> BT Command is used
to set/read the time-of-silence that precedes the
command sequence character (CC Command) of
the AT Command Mode Sequence.
The default sequence used to enter AT Command
Mode is as follows:
•
No characters sent for 1 second
[BT (Guard Time Before) Command]
•
Send three plus characters "+++" [CC
(Command Sequence Character) Command]
•
No characters sent for 1 second [AT (Guard Time After) Command]
All values in the sequence can be modified.
AT Command: ATBD
Binary Command: 0x15 (21 decimal)
Parameter Range: 0 – 8
Parameter
Default Parameter Value: 3
Number of bytes returned: 1
AT Command: ATBR
Binary Command: 0x39 (57 decimal)
Parameter Range: 0 – 1
Parameter
Default Parameter Value: 1
Number of bytes returned: 1
AT Command: ATBT
Binary Command: 0x04 (4 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0x0A (10 decimal)
Number of bytes returned: 2
Related Commands: AT (Guard Time After),
CC (Command Sequence Character)
BAUD (bps)
Value
Configuration
0
1200
1
2400
2
4800
3
9600
4
19200
5
38400
6
57600
7
115200
8
230400
BAUD (bps)
Value
Configuration
0
9600
1
115200
[x 100 milliseconds]
Page 33
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