Planning a simple RF Distribution System

[Murphyv310]

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.

Hi Jeffrey.
Indeed I did have three channels fed into the LNA with excellent results on screen, there were certainly plenty of harmonics well up into UHF, of course these are seen directly off my three auroras but at a much lower level. If I can suitably attenuate the output of the LNA I can view the harmonics on a spectrum analyser program I have for the SdrPlay RSP1A, all dependent on time though.