MaxStream 9XTend, Руководство по эксплуатации продукта

Страница: 27 / 59

9XTend™ OEM RF Module – Product Manual v1.2.4
© 2005 MaxStream, Inc. Confidential & Proprietary 27
NB (Parity) Command
AT Command: ATNB
Binary Command: 0x23 (35 decimal)
Parameter Range: 0 – 4
Parameter
Value
Configuration
0
8-bit (no parity or
7-bit (any parity)
1 8-bit even
2 8-bit odd
3 8-bit mark
4 8-bit space
Default Parameter Value: 0
Number of bytes returned: 1
<Serial Interfacing> Select/Read parity settings
for UART communications.
PK (Maximum RF Packet Size) Command
AT Command: ATPK
Binary Command: 0x29 (41 decimal)
Parameter Range: 0 – 0x800 [Bytes]
Default: 0x100 or 0x800*
(256 or 2048 decimal)
Number of bytes returned: 2
Related Commands: BR (RF Data Rate) RB
(Packetization Threshold), RO (Packetization
Timeout), WN (Warning Data)
<RF Interfacing> Set/Read the maximum size of
RF packets transmitted from a module. The
maximum packet size can be used along with the
RB and RO parameters to implicitly set the
channel dwell time.
If PK is set above 256 and BR is subsequently
changed to 0, PK will automatically be lowered to
256 and a warning will be raised (see BR (RF
Data Rate) and WN (Warning Data) Commands
for details).
Changes to the PK parameter may have a secondary effect on the RB (Packetization Threshold)
parameter. RB must always be less than or equal to PK. If PK is changed to a value less than the
current value of RB, RB is automatically lowered to be equal to PK.
* When BR = 0 (9600 baud), the maximum PK value is 0x100 (256d). When BR = 1 (115,200
baud), the maximum PK value is 0x800 (2048d).
PL (Power Level) Command
AT Command: ATPL
Binary Command: 0x3A (58 decimal)
Parameter Range: 0 – 4
Parameter
Value
Configuration
0 1 mW
1 10 mW
2 100 mW
3 500 mW
4 1000 mW (1 Watt)
Default Parameter Value: 4
Number of bytes returned: 1
<RF Interfacing> Set/Read the power level at
which the module transmits data.