Specifications

Ra-01SC Specification V1.1

7. FAQ

7.1 Factors affecting transmission distance

(1) When there is a straight line communication obstacle, the communication distance will be

attenuated accordingly

(2) Temperature, humidity, and co-frequency interference will increase the communication

packet loss rate;

(3) The ground absorbs and reflects radio waves, the test effect is poor when it is close to the

ground

(4) Sea water has a strong ability to absorb radio waves, so the seaside test results are poor；

(5) If there is a metal object near the antenna or placed in a metal shell, the signal attenuation

will be serious；

(6) Incorrectly set the power register, and the air speed is set too high (the higher the air speed,

the closer the distance)

(7) The low voltage of the power supply at room temperature is lower than the recommended

value, the lower the voltage, the lower the power output;；

(8) The poor matching degree of the antenna and the module or the quality of the antenna itself

7.2 Module use reminder

(1) Check the power supply to ensure that it is between the recommended supply voltages. If it

exceeds the maximum value, it will cause permanent damage to the module;

(2) Check the stability of the power supply, and the voltage should not fluctuate significantly

and frequently;

(3) Ensure the anti-static operation during installation and use, and the electrostatic sensitivity

of high-frequency devices;

(4) Ensure that the humidity during installation and use should not be too high, and some

components are humidity sensitive devices;

(5) If there is no special requirement, it is not recommended to use it at too high or too low

temperature.

7.3 Interfering factors

(1) There is co-channel signal interference nearby,please stay away from the interference

source or modify the frequency and channel to avoid interference;

(2) The clock waveform on SPI is not standard, please check whether there is interference on

the SPI line, and the SPI bus line should not be too long;

(3) Unsatisfactory power supply may also cause garbled codes, so the reliability of the power

supply must be ensured;

(4) Extension cords and feeders are of poor quality or too long, which will also cause a high bit

error rate

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