12
Channel
The
Channel Setting
identifies the radio channel in use.
16 numbered channels (11-26) are defined by the IEEE 802.15.4-2003 standard in the
2.4GHz ISM band. Channels are spaced 5MHz apart. The default is channel 20.
1
User Tip:
Channels 15, 20, 25, and 26 for IEEE 802.15.4-2003 networks are usually
available. They’re good choices because they don’t interfere with the 802.11
network channels typically in use.
Note 1.
The center frequency of these channels is defined as
Fc = 2405 + 5 (k – 11)
in megahertz,
where
k
= the channel number; 11, 12, etc, through 26.
Power
Power
is the transmit power in dBm that the module will transmit. The value
MAX: 20 dBm
represents the typical maximum power output of the module.
The default value is
MAX: 20 dBm
with the power amplifier enabled (see page 13).
With the power amplifier disabled, the value is
MAX: 3dBm
.
The transceiver offers a programmable output range. So with the PA enabled, the power
out ranges from 20 dBm to -12 dBm. With the PA disabled, the power output ranges
from +3 dBm to -32 dBm.
It’s a good idea to determine the actual maximum power output of the module you are
using by first running a TONE transmit test using the default maximum setting. This is
described in
Determining a Module’s Maximum Power
on page 16. (See also
Send Mode
,
described on page 14.)
After you’ve determined the real maximum power of the module, you can then run tests
using lower values. For example,
MAX: –01dB
represents your module’s maximum
power less approximately 1 dBm.
Boost Mode
If
Boost Mode
is set to
ON
, power is boosted to the transmitter by about 2 dBm. The
default setting is
OFF
.
