Applicable to SU only.
Not applicable to units with SW version 2.0 or higher.
The highest frequency in the subset to be used for scanning.
For 5.8GHz products the range is 5740 to 5830 MHz using 10MHz resolution.
For 4.9GHz products the range is 4920 to 5080 MHz using 10MHz resolution.
For HW Revision C and above this leaf is not relevant - shall return 0.