Originally Posted by rkhobbit
Thanks for the CATV info... I do know when you go to the 5 LNB DirecTV satellite dish for the MPEG-4 HDTV channels, you will have to get a new multi-switch for the added 2 LNB's. The new multi-switches still have an OTA input on them so the signals can still be combined and distributed. The DSS and OTA signals can then be separated at the TV input with a simple diplexor.
Sorry, the multiswitches for the 5-lnb dishes do NOT have an OTA input so you can't diplex the OTA signals on to the satellite lines. The reason is that the new DirecTV10 and 11 satellites transmit signals in the Ka b-band and when that is output from the dish it is in the same frequency space as OTA.
There are three potential solutions to this:
1. Run a new cable to each location that needs OTA
2. Do something creative with the b-band converter. You need a bbc on every line into a receiver/DVR that can receive signals from the 99/103 satellite slots. The bbc converts the b-band signal into an a-band signal that can be received by the HR20 DVR and H20 receiver. It is designed to be placed at the receiver, but if you place it further away from the receiver (for example at the output from a multiswitch) you can insert a diplexer after the bbc and then another one at the receiver. You need to convert the gender of one of the connectors. DirecTV will NOT support an installation of the bbcs like this but it is probably going to work, unless the bbc is too far from the receiver (no-one knows what "too far" means). I have one line set up like this and it passes the DirecTV channel 499 "bbc test" so that's a good sign. Won't know for sure it works until DirecTV10 goes live in September.
3. If you need OTA diplexed onto a line to an HR20, you can wait for the new SWM (Single Wire Multiswitch) which will probably be available in the fall sometime. The SWM allows you to drive multiple tuners (either five or eight depending on the model) over a single cable, and diplex in OTA at the same time. Only the HR20, H20 and D12 are hardware-compatible with the SWM and only the HR20 currently has compatible software (although I think the D12 is in the process of a new download which enables SWM). None of the older receivers will work with the SWM.