SA tivo remotes do not have tv ch keys and so do not have the commands. A directivo remote, has a SAT/TV switch, in which under TV the ch keys will work the to change tv ch's. This switch on SA tivo remotes is replaced with a DVR1/DVR switch.
Anyways directivo remotes are at least 3 years old, meaning their code database is too. Their will NEVER get anymore codes in the code database than they have now.