I am copying below my July 2020 post, which proves that in a really noisy environment like mine, a filter connected before LNA is a must. In this case LNA is built into the ProStick.
CLICK ON GRAPHS TO SEE LARGER SIZE
My case is exactly opposite.
I see almost negligible aircraft when I remove filter and connect antenna directly to the ProStick Plus:
NOTE:
Every time I removed and inserted the Filter, I made sure that all connectors are fully tightened, so the drastic drop is not due to loose connection. Actually I have several Cell/Mobile phone companies antennas on my building as well as adjuscent buildings, which causes overload of the LNA of ProStick Plus, and its SAW chip being located after the LNA, cannot protect the LNA from overload.
I hope in next version of Pro Stick Plus which is due to be released shortly, they will either relocate the SAW filter between LNA and input SMA connector, or may be add one more SAW between SMA connector and LNA. Let us wait and see.
- Up to 21:20 EDT > Antenna connected to Pro Stick PLUS through FA Light Blue Filter
- From 21:20 to 21:50 EDT > Antenna connected to Pro Stick PLUS directly (Filter removed).
- From 21:50 to 22:00 EDT > Antenna connected to Pro Stick PLUS through FA Light Blue Filter
- From 22:00 to 22:25 EDT > Antenna connected to Pro Stick PLUS directly (Filter removed).
- From 22:25 EDT to end of graph > Antenna connected to Pro Stick PLUS through FA Light Blue Filter
