Ebyte E220-900MM22S, Руководство пользователя, Страница: 9 / 14

Chengdu Ebyte Electronic Technology Co., Ltd. E220-900MM22S User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co., Ltd.
5 Basic Application
5.1 Basic Circuit
Note: The L1 inductor is a protective device used to prevent the device from being damaged due to excessive input
power of the antenna. The user should add this inductor when using the module.
6 FAQ
6.1 Communication Range Is Too Short

The communication distance will be affected when obstacle exists;

Data lose rate will be affected by temperature, humidity and co-channel interference;

The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground;

Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea;

The signal will be affected when the antenna is near metal object or put in a metal case;

Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
distance);

At room temperature, the low voltage of the power supply is lower than the recommended value. The lower the
voltage, the lower the output power.;

Due to antenna quality or poor matching between antenna and module.