Ebyte E49-400M30S, User Manual, Page: 10 / 15

Chengdu Ebyte Electronic Technology Co.,Ltd. E49-400M30S User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd. 9
Chapter 5 Basic application
5.1 Hardware design & schematics
Chapter 6 FAQ
6.1 Transmission distance
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When there is a linear communication barrier, the communication distance will decay accordingly;

Temperature, humidity and the same frequency interference will lead to the increase of communication packet loss
rate;

The ground absorbs and reflects radio waves, and the test results are poor near the ground;

Sea water has a strong ability to absorb radio waves, so the seaside test results are poor;

If there are metal objects near the antenna or placed in a metal shell, the signal attenuation will be very serious;

Power register set wrong, air speed set too high (the higher the air speed, the closer the distance);

At indoor temperature, the power supply low voltage is lower than the recommended value, the lower the voltage,
the smaller the power;

The use of antenna and module matching degree is poor or the quality of the antenna itself.