Ebyte E220P-400T22S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E220P-400T22S User Manual
Copyright ©2012–2020,
Chengdu Ebyte Electronic Technology Co., Ltd.
16
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When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, and
the whole machine is conducive to long-term stable operation;
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The module should be as far away as possible from power supply, transformer, high frequency wiring and other parts with large
electromagnetic interference;
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High-frequency digital traces, high-frequency analog traces, and power traces must avoid under the module. If they really need
to pass under the module, assuming that the module is soldered to the Top Layer, lay copper on the Top Layer of the contact part
of the module (all copper and Good grounding), must be close to the digital part of the module and routed in the Bottom Layer;
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Assuming that the module is soldered or placed on the Top Layer, it is also wrong to randomly route the wires on the Bottom
Layer or other layers, which will affect the stray and receiving sensitivity of the module to varying degrees;

Assuming that there are devices with large electromagnetic interference around the module, it will greatly affect the performance
of the module. According to the intensity of the interference, it is recommended to stay away from the module. If the situation
permits, proper isolation and shielding can be done;
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Assuming that there are traces with large electromagnetic interference around the module (high-frequency digital,
high-frequency analog, power wiring), it will also greatly affect the performance of the module. According to the intensity of the
interference, it is recommended to stay away from the module. Isolation and shielding;
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Try to stay away from part of the physical layer that is also 2.4GHz TTL protocol, such as: USB3.0;
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The antenna installation structure has a great influence on the performance of the module. Make sure that the antenna is exposed
and it is best to be vertically upward;
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When the module is installed inside the case, a high-quality antenna extension cable can be used to extend the antenna to the
outside of the case;
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The antenna must not be installed inside the metal shell, which will greatly reduce the transmission distance.
10. FAQ
10.1 Communication range is too short
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When there is a straight-line communication obstacle, the communication distance will be attenuated accordingly;
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Temperature, humidity, and co-frequency interference will increase the communication packet loss rate;
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The ground absorbs and reflects radio waves, and the test results near the ground are poor;
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Sea water has a strong ability to absorb radio waves, so the seaside test results are poor;
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If there is a metal object near the antenna or placed in a metal shell, the signal attenuation will be very serious;
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The power register setting is wrong, the air speed setting is too high (the higher the air speed, the closer the distance);