Switch3850# ap name mode se-connect
Changing the AP's mode will cause the AP to reboot.
Are you sure you want to continue? (y/n)[y]: y

After AP reboots:

Switch3850# show ap name config dot11 5ghz

....

CleanAir Management Information
     CleanAir Capable                          : Yes
     CleanAir Management Admin State           : Enabled
     CleanAir Management Operation State      : Up
     Rapid Udpate Mode                          : Disabled
     Spectrum Expert connection                : Disabled
     CleanAir NSI Key                          : AEB0581105F6010E1285943F87CC7F8A
     Spectrum Expert connections counter      : 0
     CleanAir Sensor State                     : Configured

Rogue Containment Information
     Containment Count                          : 0

To find the IP address:

show cdp neighbors detail

-------------------------
Device ID:
Entry address(es):
IP address: 10.10.5.226
Platform: cisco AIR-CAP3602I-A-K9, Capabilities: Router Trans-Bridge
Interface: GigabitEthernet1/0/34, Port ID (outgoing port): GigabitEthernet0.1
Holdtime : 127 sec

Version :
Cisco IOS Software, C3600 Software (AP3G2-K9W8-M), Version 15.2(4)JN, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Tue 01-Oct-13 19:18 by prod_rel_team

advertisement version: 2
Duplex: full
Power drawn: 15.400 Watts
Power request id: 57850, Power management id: 3
Power request levels are:15400 0 0 0 0
Management address(es):

---------------------------

int dot11radio X

no mbssidx

station-role spectrum

exit

exit

show spectrum status
----------------------------------------

SurveyAP#show spectrum status
Spectrum FW status slot 0:
version: 1.14.2
status: up, crashes 0, resets 0
load:     38.00 45.00 50.75 51.75
NSI Key: 25FA418E18EBEF028A7FB775F11610A
NSI:      configured
dfs_wdog: 1
reg_wdog: 1 0
dfs_freq: 0
Spectrum FW status slot 1:
version: 1.14.2
status: up, crashes 0, resets 0
load:     3.50 3.50 3.75 3.75
NSI Key: 125FA418E18EBEF028A7FB775F11610A
NSI:      not configured
dfs_wdog: 0
reg_wdog: 255 290
dfs_freq: 0

Launch Chanalyzer for CleanAir or Chanalyzer 5 with the CCA licenses.

Enter the AP ip address and NSI key.

Enjoy!