Ebyte E70-433NW30S User Manual

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Ebyte E70-433NW30S User Manual Manual pdf 22 page image

Chengdu Ebyte Electronic Technology Co,;Ltd E 70-433NW30S user manualCopyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 21 When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of themargin, so the whole machine is beneficial for long-term stable operation.； The module should be as far away as possible from the power supply, transformers, high-frequency wiring and otherparts with large electromagnetic interference.； High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the module.If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the copper isspread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of the moduleand routed in the Bottom Layer； Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layeror other layers, which will affect the module's spurs and receiving sensitivity to varying degrees； It is assumed that there are devices with large electromagnetic interference around the module that will greatly affectthe performance. It is recommended to keep them away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding can be done； Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,power traces) around the module that will greatly affect the performance of the module. It is recommended to stayaway from the module according to the strength of the interference. If necessary, appropriate isolation and shieldingcan be done. If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there isstill a risk of damage)； Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0； The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensurethat the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a goodantenna extension cable to extend the antenna to the outside； The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatlyweakened.11 FAQ11.1 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 thedistance). The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower thetransmitting power. Due to antenna quality or poor matching between antenna and module.