If a recorder has an ATSC (digital) tuner it actually tunes all the “stations” but will not display any that are encoded by your program provider. The DMR-ES35V has a NTSC (analog) tuner that will not display any “stations” encoded by your program provider.
To view or record encoded “stations” you need the satellite or cable box. These boxes unscramble those encoded signals and map them to various “channels” as determined by your provider’s tuning device. You may input that signal to your recorder or TV.