06-01-2019, 08:44 PM
Just to make this clear, the LNA is amplifying the Aurora or Hedghog output. Not as a preamp for the TV.
It would be interesting to see what happens if you combine 2 or more signals into the LNA. Especially if you can view the result on a spectrum analyser. That would really test the linearity with large signals. If you wanted to make a larger distrubition system with these LNAs then they're cheap enough to consider using one per channel with combining at high level. That would certainly keep crossmod under control. Though a LPF between the modulator and LNA would always be a good idea. The harmonics from an Aurora or Hedghog are truly horrible, espcially in Band I.
It would be interesting to see what happens if you combine 2 or more signals into the LNA. Especially if you can view the result on a spectrum analyser. That would really test the linearity with large signals. If you wanted to make a larger distrubition system with these LNAs then they're cheap enough to consider using one per channel with combining at high level. That would certainly keep crossmod under control. Though a LPF between the modulator and LNA would always be a good idea. The harmonics from an Aurora or Hedghog are truly horrible, espcially in Band I.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
