Hardware Design - Ebyte E30-433T20S3 User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.
2
0
1
1
0
0
1
1
The binary bit of the byte
The specific value
( configured by user)
Meaning
Corresponding hexadecimal

8. Hardware design

It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, and

the module needs to be reliably grounded.；
Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse

connection may cause permanent damage to the module；
Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the

maximum value the module will be permanently damaged；
Please check the stability of the power supply, the voltage can not be fluctuated frequently；

When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the

margin, so the whole machine is beneficial for long-term stable operation.；
The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other

parts with large electromagnetic interference.；
High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the

module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the
copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of
the module and routed in the Bottom 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；
Copyright ©2012
14
FEC switch
Turn off FEC
Turn on FEC（Default）
0 transmission power (approximation)
0
1
0
1
For example: The meaning of No.3 "SPED" byte
7 6
0 0
UART parity bit
8N1
1
– 2018 ，
20dBm（Default）
17dBm
14dBm
10dBm
5 4
0 1
UART baud rate is 9600
Chengdu Ebyte
E30-433T20S3 User manual
After turn off FEC, the actual data

transmission rate increases while
anti-interference ability decreases.
Also the transmission distance is
relatively short.
Both communication parties must

keep on the same pages about
turn-on or turn-off FEC.
The external power must make sure

the ability of current output more
than 250 mA and ensure the power
supply ripple within 100mV.
Low power transmission is not

recommended due to its low power
supply efficiency.
3 2 1
1 0 1
Air data rate is 2.4k
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