Mac/Phy Commands; Af (Available Frequencies); Cm (Channel Mask) - Digi XBee-PRO S3 User Manual

AT commands

MAC/PHY commands

The following Binary commands are MAC/PHY commands.

AF (Available Frequencies)

You can query this read-only command to return a bitfield of the frequencies that are available in the
device's region of operation. This command returns a bitfield. Each bit corresponds to a physical
channel.
Note that the least significant bit in the bitmask selects the channel in the lowest frequency in the
range.
Channels for these data rates are spaced 400 kHz apart.
Bit 0 – 902.400 MHz
Bit 1 – 902.800 MHz
.
.
.
Bit 31 – 914.800 MHz
.
.
.
Bit 63 – 927.600 MHz
Parameter range
0x1FFFFFF – 0x00FFFFFFFFFFFFFFFF
Default
Region
United States/Canada
Australia
Brazil
Singapore

CM (Channel Mask)

CM allows you to selectively enable or disable channels used for RF communication. This is useful to
avoid using frequencies that experience unacceptable levels of RF interference, or to operate two
networks of radios on separate frequencies.
This command is a bitfield. Each bit in the bitfield corresponds to a frequency as defined in the AF
(Available Frequencies) command. When you set a bit in CM and the corresponding bit in AF is 1, then
the device can choose that channel as an active channel for communication.
A minimum of MF channels must be made available for the device to communicate on. You can use the
MF command to query the minimum number of channels required for operation. If a CM setting would
result in less than MF active channels being enabled, then the device returns an error. If there are
XBee®-PRO 900HP/XSC RF Modules
Bitfield
0x00FFFFFFFFFFFFFFFF
0x00FFFFFFFE00000000
0x00FFFFFFFE00000FFF
0x00FFE00000000000
MAC/PHY commands
Channels
0-63
33-63
0-11, 33-63
63-52
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