I've had my 2 HD DVRs for several months now, and believe myself to be prretty familiar with most of the settings and capabilities.
I have not been able to set the SD override to any setting other than 480i and have that setting retained.
In the video settings menu, for SD Override, there are three settings:
(1) With SD Override OFF, the STB sends ALL CHANNELS (HD and SD) in 1080i (the SD channels are upconverted);
(2) When set at 480i, the STB sends the signal for SD channels in 480i, and the HD channels in 1080i;
(3) When set at 480p, the STB sends the signal for SD channels in 480p, and the HD channels in 1080i.
I prefer to set the STB to output 1080i all of the time (setting (1) above), since when the SD channels are NOT unconverted to 1080i, the STB experiences long delays whenever switching between SD and HD channels as the HDMI handshake has to be re-established. When you have the SD channels upconverted in the STB, the output 1080i signals results in faster channels switching.
HOWEVER, whever I set the SD output override to 480p or OFF, it "keeps" the setting for as long as the STB remains on, and the next time I turn the STB on, it has reverted to 480i.
How can I make my SD override setting "stick" and not reset to 480i by itself?