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AT commands
Note
If operating on channel 26 (CH = 0x1A), output power will be capped and cannot exceed 8 dBm
regardless of the PL setting.
Parameter range
0 - 4
The following table shows the TX power versus the PL setting.
PL setting
XBee 3 TX power
4
8 dBm
3
5 dBm
2
2 dBm
1
-1 dBm
0
-5 dBm
Default
4
PP (Output Power in dBm)
Display the operating output power based on the current configuration (channel and PL setting). The
values returned are in dBm, with negative values represented in two's complement; for example:
-5 dBm = 0xFB.
Parameter range
0 - 0xFF [read-only]
Default
N/A
CA (CCA Threshold)
Defines the Clear Channel Assessment (CCA) threshold. Prior to transmitting a packet, the device
performs a CCA to detect energy on the channel. If the device detects energy above the CCA
threshold, it will not transmit the packet.
The CA parameter is measured in units of -dBm. The CCA threshold is set upon device initialization,
any change to the CCA threshold must be written to flash with the WR command and the module
reset (power cycle or FR command) before the new threshold is observed.
You can set CA to 0 to disable CCA; this can improve latency but may cause interference with other 2.4
GHz devices when transmitting.
Parameter range
0 (disabled), 0x28 - 0x64 (-dBm)
Default
0x41
Digi XBee® 3 802.15.4 RF Module User Guide
XBee 3-PRO TX power
19 dBm
15 dBm
8 dBm
3 dBm
-5 dBm
RF interfacing commands
141
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