Rajant Corporation
03-100137-011
BreadCrumb® JR2 v11 User Guide
Version 11.4.0
29
The default channel and channel mode for a BreadCrumb 5 GHz n-radio is 157 (5785 MHz) and HT40+.
Some 5 GHz channels support HT40 mode. In this mode, the radio binds two standard 20 MHz
channels to obtain a wider bandwidth 40 MHz channel. The + or - designation describes if the second
channel is above or below the base channel. Plus (+) indicates that the additional 20 MHz occurs above
(at a higher frequency than) the first 20 MHz while minus (-) indicates that the additional 20 MHz
occurs below (at a lower frequency than) the first 20 MHz. Note, the frequency noted is the center
frequency of the base 20 MHz channel. This is different from 802.11a turbo mode where the frequency
was the center of a single 40 MHz wide channel. HT40 operation (+ or -) is compatible with 802.11a 20
MHz and 802.11n HT20 modes. HT40 operation is NOT compatible with 802.11a turbo mode.
Caution
Most 5 GHz antennas only support a subset of the 802.11n 5 GHz frequency channels
the Rajant radio is capable of operating at. Before changing the channel of a 5 GHz
radio, verify that the channel is supported by the connected antenna.