Hi guys.
Yesterday I noticed that my ELRS RSSI levels were lower than I expected.
As soon as I took off and flew away for a few seconds, they dropped dramatically.
The picture below shows the level at about 300 meters distance, VLOS.
I flew almost all the time in the -90 to -80 dbm range.
Is this normal or is there something I am missing?
@group-fpv tagging in the knowledge base! I use TBS crossfire so not my fortay unfortunately. 
But having tagged the whole FPV group I’m sure someone will be along shortly to help answer your question 
Pretty sure @GunjaFPV @stevesb or @Yith will have some knowledge on this.
Sorry if you don’t use elrs - I use TBS like Deano
I’ve never actually had reason to try this, but I believe that the “bench test” outlined here is the first stop if you feel like the link performance is less that it ought to be:
This might help
Thanks for the references. I’ve been reading and doing some tests.
I do not get the expected RSSI level at 1 m distance and minimum tx power. I am at 45-50 dBm all the time, no matter what the output power on the controller is set to.
So, I set output power to 250 mW and moved far away from the quad (at home) and then observed this:
10 mW for that signal level? Is it normal?
Should I disable dynamic power on the transmitter?
Disabling it is the only way I could find to improve the 1 m test outcome
Just seen Mads video about the ELRS and DJI new goggles - not sure if relevant to your issue?
Have you tried without powering the vtx? Failing the bench test would otherwise point to possible antennas issue?
Ok I can give that a try, but tomorrow.
I have the N3 goggles.
Maybe PIT mode is a good start point?
If you are talking about a Flight Controller pit mode then yeah - this should power off your vtx completely (not used DJI myself so unsure if they also have a separate pit/low power mode)
Well
I’ve tried a few more things (at home), all of them involving turning goggles on and off, applying and reverting ELRS firmware patch, unplugging O4 unit, etc…None of this made a difference
I’ve inspected the hardware and all looks ok to my eye.
Everything is really tight in there btw.
The ELRS receiver is sitting right between the XT60 wires and the bottom plate of the frame, but I have no other place to put it. The wiring does not look bad to me. The antenna looks ok.
The only thing that makes a diference (around 15 dBs difference) is disabling the dynamic power setting on the transmitter.
I guess I’ll have to go back to the field and do further testing. I’ll check if the ELRS firmware patch makes a difference or not. I do not see myself flying far away without the goggles though.
The issue affects goggles 3 and goggles N3.
So, in theory, yes
But… it should affect Link Quality, not RSSI Dbm…
Ok that makes sense.
TX16S II ELRS internal module + Happymodel EP1 TXCO is what I have.
Maybe it is what it is 
