"1252 both radios installed w/one radio enabled @ full N speed on 802.2af power"
Are there any special instructions to make this work as described in the documentation for the latest SW Version 12.4(21a)JA1?
"Support for 802.11n Performance on 1250 Series Access Points with Standard 802.3af PoE"
The Cisco Aironet 1250 Series requires 20W of power for optimum performance of 802.11n on both the 2.4- and 5-GHz bands. This feature allows you to configure one radio to operate using 802.3af. This allows full functionality under 802.3af on one radio while the other radio is disabled. When you eventually upgrade to a powering solution that provides 20W of power to the access point, you can configure the second radio so that both radios are fully functional with 2x3 multiple input multiple output (MIMO) technology.