the Digital Stream digital tv converter box should have a separate remote that came with it if you do not have it the dtv box is useless as you cannot do a scan to find the channels. you need to set the TV/VCR/TV2 switch to the proper position. your tv's are both analog if they came with the 2006 rv so they do not have the digital tuners that's what the dtv converter box is for. tv's are inexpensive now i would suggest getting new ones then different channels can be watched on the tv's and they will have the proper high definition tuners. you can get the manual for the proper dtv box here
Digital Stream digital dtv box