we have 3 different hdpvrs in our house an older Motorola 3416i, pace tdc770d ,pace dc578d. on the pace 758d it shows all the new channels in hd and the newly added ones but the other 2 don't. does this mean we need to upgrade the 3416i and tdc770d?
It sounds like you might be referring to the MPEG-4 channels being available only on your Pace Summit (758D), as while this box has an MPEG-4 hardware decoder, your other two cable boxes do not so you wouldn't be able to see any MPEG-4 channels on them unfortunately.
We have more details on MPEG-4 cable boxes and channels here. Hope this helps.
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