1. Place the antenna off the ground as far as possible, do not touch the antenna with your hands when testing, the antenna is more than 2m from the ground and the human body is more than 2m from the antenna.
2. Don't place the antenna near large metal objects, don't place it by the river, minimize the obstacle between the antenna.
3. Keep the antenna upright, not flat on the ground, not skewed, try to keep both antennas on a horizontal plane.
