Welcome to the forum and irv2, Mitch.
Here is a
Brochure and
Owners Guide for you.
This link will take you to TSB's and recalls for your coach.
In
QT's # 3, PDR John's MOD section he has TV, WIFI and many other controls equipment links to consider and maybe DS Don's as well.
Below in my signature are links to many more for your Newmar.
In the forums below RV Appliances is a TECH Forum for answers also.
Many links in # 3 PROBLEM SOLVERS that may have info you need.
Enjoy the forum and safe travels.