just my opinion
There are two approaches.
1. daisy chain the lnb signal through both receivers
2. use a power-passing splitter to feed both receivers
Either way, you really need to power off the unused receiver.
With method 1, the daisy chain, some members have reported troubles, confusion, problems, or failure to work properly.
I suspect that's because all receivers don't operate the same way when used in this manner.
Since I don't want to debug such a problem, I choose to avoid it.
Method 2 has been chosen.
You need a two-way, dual power passing splitter.
That means either receiver can power the LNBF.
The diodes protect both receivers, preventing current flow from one back through the other.
The 905, and all the 4Dtv family are unable to send diseqc or 22khz to select an LNBF.
(I doubt the 410 can, either)
There is no pay service on Ku, so the 905 needs to just default to the C-band LNBF.
But, if you want to reliably select the C-band or Ku-band LNB for the FTA receiver, you'll need a 22khz switch.
So, you use the following:
- 905 receiver, one input (may need to set to voltage control, and maybe reverse polarity?)
- FTA receiver, one input
- dual band LNBF, output for C-band, output for Ku-band
- dual power-passing splitter (three terminals, two in, one output)
- 22khz switch which only powers the selected input (not an eCoda, to the best of my knowledge)
Hook the C-lnb signal to the common splitter input
- one output of the splitter to the 905
- other output of the splitter to the OFF input of the 22khz switch
Hook the Ku-lnb signal to the ON input of the 22khz switch
- Off input of the switch to the splitter output, as above
- output of the 22khz switch to the FTA receiver
If the FTA receiver is powered off (OR on with the Ku LNB selected), then the 905 has complete control of the C-band LNB.
For the FTA receiver to control the C-band LNB, the 905 must be off, AND the FTA receiver turns off the 22khz tone.
For the FTA receiver to control the Ku-band LNB, the 905 can be on or off, and the FTA receiver must turn on the 22khz tone.
Sorry I didn't supply a picture , but it really is very simple.
Of course, you may not want to bother with the 22khz switch, and the flexibility it provides.
(
which is: letting your FTA receiver run on Ku while the 905 runs on C-band)
