I find the signals using the Broadlogic Spectrum Analyzer. If I can't lock them using DVB or DVB-S2, I use the DVBTech card or Digitrains to see if it's DC2.
Does anyone have any experience feeding the output on these into a HDD200 decoder?
I do not think that it is possible to use a commercial receiver with the HDD200. You will need either a HDD1000 or HDD1100 for your 7100 or you can connect a 4DTV receiver to either one. You can probably find other decoders on Ebay that will work with your Digitrans but I am not too familiar with them. Maybe someone else here knows a good choice.