LNA + filter installation

[motokops]

I have this band pass filter and this amplifier LNA. What would be the correct and most effective order of placement respecting IN and OUT?


Antenna --- xxxxx  ----   xxxxx ----- USB RTL SDR receptor

Thanks.

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[Anmer]

Is it powered?

[motokops]

Yes, of course.

All OK. Working perfectly. I just want to know the correct order so that it works fine. IN/OUT

[Anmer]

Maybe:

Antenna - Filter - Amplifier - Receiver

No point amplifying data you don't need?

[motokops]

is a good logical answer

Thanks

[abcd567]

Maybe:

Antenna - Filter - Amplifier - Receiver

No point amplifying data you don't need?

Fully Agree.

Just to see the difference, run an RF scan covering full frequency range of the dongle (24 Mhz to 1800 Mhz) in both the orders i.e.
Antenna>Filter>Anplifier>Dongle
Abtenna>Amplifier>Filter>Dongle

NOTE: This scan is pretty fast. One sweep across 24 Mhz to 1800 Mhz takes about 3 to 5 minutes. Few sweeps are enough

Do I Need A Filter - OPTION-4

[motokops]

I have done the test   Antenna - Filter - Amplifier - Receiver

The filter and amplifier works very well.

In the attached file the result

Thanks.







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