Can I control the Xi6A WiFi band / channel? Soundbar interference.

I am troubleshooting interference from my soundbar to an Xi6-A box. Is there a way to see what band/channel the Xi6 is using and to force it to working channel?  I was getting good performance for a few weeks, but a power failure reset everything and I guess the Xi6 negotiated another chan. The symptom is choppy/stalling video or distorted audio. Here is my setup:

Cisco DPC3941T         Xi6-A    (-> HDMI)    LG OLED TV    (-> optical)    LG SN6Y soundbar

Thanks, Mike