Measuring or estimating Noise Equivalent Distance (NED) of Ronja Tetrapolis or Inferno.

General requirements

Ensure there is only a dim lighting in the room. Otherwise, the measured value may be reduced.

If you have these requirements:

Otherwise, perform the ping variant, which is much less exact.

NED should be around:

Model/configuration	NED [m]
Tetra-/Metropolis SFH203	5
Tetra-/Metropolis BPW43	4
Inferno	5.2
Tetra-/Metropolis PW43, BF982, UA733-TO5-10 and BC547 in receiver	2

Note that NED will be reduced if the transmitter duty cycle is not properly adjusted.