Common Problems; Transmission Distance Is Not Ideal; Module Is Easily Damaged - Ebyte E330-400T13S User Manual

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large electromagnetic interference;
High-frequency digital wiring, high-frequency analog wiring, and power wiring must avoid the bottom of the module. If it is
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necessary 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 well grounded), it must be close to the digital part of the module and routed in the
Bottom Layer;
Assuming that the module is soldered or placed on the Top Layer, it is also wrong to randomly route the wires on the Bottom
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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
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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;
Assuming that there are traces with large electromagnetic interference around the module (high-frequency digital,
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high-frequency analog, power wiring) 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 Appropriate isolation and shielding;
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a risk
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of damage);
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 impact on the performance of the module. Make sure that the antenna is exposed
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and it is best to be vertically upward;
When the module is installed inside the case, a high-quality antenna extension cable can be used to extend the antenna to the
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outside of the case;
The antenna must not be installed inside the metal shell, which will greatly reduce the transmission distance.
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10. Common problems

10.1 Transmission distance is not ideal

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 effect is poor when it is close to the ground;
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Sea water has a strong ability to absorb radio waves, so the seaside test effect is poor;
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If there are metal objects near the antenna or placed in a metal shell, the signal attenuation will be very serious;
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The power register is set incorrectly, and the air rate is set too high (the higher the air rate, the closer the distance);
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The low voltage of the power supply at room temperature is lower than the recommended value, and the lower the voltage, the
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lower the power output;
The matching degree of the antenna and the module is poor or the quality of the antenna itself is problematic
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10.2 Module is easily damaged

Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds the maximum
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value, it will cause permanent damage to the module;
Please check the stability of the power supply, and the voltage should not fluctuate significantly and frequently;
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Please ensure that the installation and use process is anti-static, and high-frequency components are electrostatically sensitive;
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Please ensure that the humidity should not be too high during installation and use, and some components are humidity
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E330-400T13S User Manual
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