RF-DG-32A
Shenzhen RF-star Technology Co., Ltd.
Page 15 of 19
5 Application, Implementation, and Layout
5.1 Recommended Operation Conditions
Functional operation beyond the limits of the following table cannot guarantee performance, and operation outside this
limit for a long time will more or less affect the reliability of the module. Operating temperature is limited by changes in
crystal frequency.
Symbol
Condition
Min.
Typ.
Max.
Unit
V
BAT
and V
IO
Battery mode
4.95
5.00
5.05
V
Operating Temperature
-20
25
75
℃
Ambient Thermal Flow
-20
20
℃
/miniute
5.2 Basic Operation of Hardware
1.
It is recommended to offer the module with a DC stabilized power supply, a tiny power supply ripple coefficient and
the reliable ground. Please pay attention to the correct connection between the positive and negative poles of the
power supply. Otherwise, the reverse connection may cause permanent damage to the module;
2.
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.
3.
It is recommended to stay away from the devices whose TTL protocol is the same 2.4 GHz physical layer, for
example: USB 2.0.
5.3 Trouble Shooting
5.3.1 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.
