RF-43UH
Shenzhen RF-star Technology Co., Ltd.
Page 31 of 35
8.2 Trouble Shooting
8.2.1 Unsatisfactory Transmission Distance
1.
When there is a linear communication obstacle, the communication distance will be correspondingly weakened.
Temperature, humidity, and co-channel interference will lead to an increase in communication packet loss rate. The
performances of ground absorption and reflection of radio waves will be poor, when the module is tested close to
the ground.
2.
Seawater has a strong ability to absorb radio waves, so the test results by seaside are poor.
3.
The signal attenuation will be very obvious, if there is a metal near the antenna or the module is placed inside of the
metal shell.
4.
The incorrect power register set or the high data rate in an open air may shorten the communication distance. The
higher the data rate, the closer the distance.
5.
The low voltage of the power supply is lower than the recommended value at ambient temperature, and the lower
the voltage, the smaller the power is.
6.
The unmatchable antennas and module or the poor quality of antenna will affect the communication distance.
8.2.2 Vulnerable Module
1.
Please ensure the supply voltage is between the recommended values. The module will be permanently damaged
if the voltage exceeds the maximum value. Please ensure the stable power supply and no frequently fluctuated
voltage.
2.
Please ensure the anti-static installation and the electrostatic sensitivity of high-frequency devices.
3.
Due to some humidity sensitive components, please ensure the suitable humidity during installation and application.
If there is no special demand, it is not recommended to use at too high or too low temperature.
8.2.3 High Bit Error Rate
1.
There are co-channel signal interferences nearby. It is recommended to be away from the interference sources or
modify the frequency and channel to avoid interferences.
2.
The clock waveform on SPI is not standard. Check whether there is interference on the SPI line. The SPI bus line
should not be too long.
3.
The unsatisfactory power supply may also cause garbled. It is necessary to ensure the power supply reliability.
4.
If the extension wire or feeder wire is of poor quality or too long, the bit error rate will be high.
8.3 Electrostatics Discharge Warnings
The module will be damaged for the discharge of static. RF-star suggest that all modules should follow the 3 precautions
below:
