This is normal for all the RSNs. The HD feed is only active when an HD sporting event is on.
The good news is that there should be a lot more HD sporting events on the RSNs once the new station is complete in Houston (sometime in the next 12 months).
The good news is that there should be a lot more HD sporting events on the RSNs once the new station is complete in Houston (sometime in the next 12 months).