Hi Andy,
Thanks for the clarification.
Please can you confirm the controller platform and software version you are using.
The data sheet for the R510 indicates that the platform is capable of using the higher frequency channels:
However it could be a limiation on the version of your controller platform and/or version. I've attached a screenshot of SmartZone 5.2.0 on a UK-configured Zone, with 5.8GHz channels enabled.
![Image_ images_messages_5f91c45d135b77e247a49e81_d32f3482aa8ed896ef9f2c8c0b9ac526_RackMultipart2020080716296um2h-487aef12-d28a-4b43-81f7-c9abed695338-600351753.png1596790546 Image_ images_messages_5f91c45d135b77e247a49e81_d32f3482aa8ed896ef9f2c8c0b9ac526_RackMultipart2020080716296um2h-487aef12-d28a-4b43-81f7-c9abed695338-600351753.png1596790546](/t5/image/serverpage/image-id/1840iB76C6889A0EF0620/image-size/large?v=v2&px=999)
Thanks,
Darrel.