The Logitech Harmony remote series are programmed via an app on your PC and eliminate the need to run through what can be a very time-consuming game of chance to find codes. Unfortunately, many of the systems installed in RVs are off-brand or no-name units and aren't even listed in Logitech's databases (which contain tens of thousands of brands and models). I have replaced the unit supplied with my RV and control the DVD/Blue Ray player, satellite TV receiver, TV, and Polk Audio sound bar with wireless sub with a single Logitech Harmony remote. It's extremely convenient.
U.S. Army retired
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
2012 F350 CC DRW Lariat 6.7
Full-time since 8/2015