What I've learned since getting the V8 finder:
- Connected to an LNBF, even if it's obstructed, will have a signal reading.
- Make sure the LO frequency selected matches the LNBF!
- If you don't already have a known transponder entered in, you'll never see a quality reading.
- You can tell which satellite it is, if you have a unique transponder (freq+polarity+symbolrate) for each one.
- You can get lucky by adjusting the dish for the highest signal reading, then doing a blind scan.
And to address the H/V-L/R issue: no receiver cares about that. The LNBF selects which direction/orientation based on the input voltage, and linear/circular is determined by the physical construction and electrical properties of the LNBF. Once the signal comes down the wire it's just a signal, no polarity at all.
Whether or not it can detect or find anything on the dish satellites, is something I will add to my list of things to do next opportunity to "waste time in my dish garden" as Mrs Pepper refers to it.