Chengdu Ebyte Electronic Technology Co.,Ltd.
E150-400T30S user manual
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Chengdu Ebyte Electronic Technology Co.,Ltd.
38
Chapter 10 hardware design
It is recommended to use a DC regulated power supply to supply power to the module. The ripple coefficient
of the power supply should be as small as possible, and the module should be reliably grounded;
Please pay attention to the correct connection of the positive and negative poles of the power supply. If
reversed, the module may be permanently damaged;
Please check the power supply to ensure that it is between the recommended power supply voltage. Exceeding
the maximum value will cause permanent damage to the module;
Please check the stability of the power supply, and the voltage cannot fluctuate greatly and frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30%
margin, which is conducive to the long-term stable operation of the whole machine;
modules shall be far away from power supply, transformer, high-frequency wiring and other parts with large
electromagnetic interference as far as possible;
The high-frequency digital wiring, high-frequency analog wiring and power wiring must avoid the lower part
of the module. If it is really necessary to pass through the lower part of the module, it is assumed that
the module is welded on the top layer, and copper is laid on the top layer of the module contact part (all
copper is laid and well grounded). It must be close to the digital part of the module and run on the bottom
layer;
Assuming that the module is welded or placed on the top layer, it is also wrong to randomly route on the
bottom layer or other layers, which will affect the stray and receiving sensitivity of the module to varying
degrees;
It is assumed that there are devices with large electromagnetic interference around the module, which will
greatly affect the performance of the module. It is recommended to stay away from the module properly according
to the intensity of the interference. If the situation allows, it can be properly isolated and shielded;
It is assumed that there are wiring with large electromagnetic interference (high-frequency digital,
high-frequency analog, power wiring) around the module, which will also greatly affect the performance of
the module. It is recommended to keep away from the module according to the intensity of interference. If
the situation allows, it can be properly isolated and shielded;
If the communication line uses 5V level, 1k-5.1k resistors must be connected in series (not recommended,
there is still a risk of damage);
Try to stay away from some TTL protocols whose physical layer is also 2.4GHz, such as USB3.0;
The antenna installation structure has a great impact on the performance of the module, and the antenna must
be exposed and preferably vertically upward;
When the module is installed inside the cabinet, a high-quality antenna extension cable can be used to extend
the antenna to the outside of the cabinet;
The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.