Answer
To control the 5GHz scanning channel, you need to set the following registry:
[HKEY_LOCAL_MACHINE\Comm\SDCCF10G1\Parms\Configs\GlobalConfig] "adminFiles" and the definition is as below
; ; 1111 1111 1111 1111
; ; 6655 4433 2221 1000 6655 4443
; 5 GHz Channel Mask ; 5173 9062 8406 2840 4062 8406
; ; - ---- ---- ---- ---- ----
;"5GHzChanMask"=dword:ffffffff ; Full* ( 1111 1111 1111 1111 1111 1111)