Chengdu Ebyte Electronic Technology Co., Ltd.
E22-230T22S User manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
25
Layer；
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over
the Bottom Layer or 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 affect the 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 stay away from the module according to the strength of the
interference.If necessary, appropriate isolation and shielding can be done.
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 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 ensure that the antenna is exposed, preferably vertically upward. When the module is
mounted inside the case, use a good antenna 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 greatly weakened.
