Precautions For Use - Ebyte E90-DTU(400SL47) Manual

Chengdu Ebyte Electronic Technology Co., Ltd

15 Precautions for Use

Please keep the warranty card of this equipment, the warranty card has the factory number of the equipment (and
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important technical parameters), for the user's future maintenance and new equipment has an important reference
value.
Radio in the warranty period, if due to the quality of the product itself and non-man-made damage or damage
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caused by lightning and other natural disasters, enjoy free warranty; please do not repair the user, the problem is to
get in touch with the Division I, Yibaiyi BaiTe to provide first-class after-sales service.
Do not operate this radio when it is in the vicinity of flammable locations (such as coal mines) or explosive
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hazardous objects (such as detonators for detonation).
Should choose a suitable DC regulated power supply, the requirements of high-frequency interference resistance,
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small ripple, and have sufficient load capacity; it is best to have over-current, over-voltage protection and lightning
protection, to ensure that the digital radio work properly.
Do not use the digital radio in an operating environment that exceeds its environmental characteristics, such as high
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temperature, humidity, low temperature, strong electromagnetic fields or dusty environments.
Do not allow the digital radio to continuously transmit at full capacity or you may burn out the transmitter.
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The ground wire of the digital radio should be well connected with the ground wire of the external equipment (such

as PC, PLC, etc.) and the ground wire of the power supply, otherwise it is easy to burn out the communication
interface, etc.; do not plug or unplug the serial port with electricity.
When testing the digital radio, a matching antenna or 50 Ω dummy load must be connected, otherwise the
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transmitter will be easily damaged; if an antenna is connected, it is better for the human body to be more than 2
meters away from the antenna to avoid injury, and never touch the antenna while transmitting.
Wireless digital transmission radio in different environments often have different communication distance,
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communication distance is often affected by temperature, humidity, obstacle density, obstacle volume,
electromagnetic environment; in order to ensure that you can get stable communication, it is recommended to
reserve more than 50% of the communication distance margin.
If the measured communication distance is not satisfactory, it is recommended to analyze the antenna quality and
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antenna installation method to improve the communication distance. You can also contact with
support@cdebyte.com.
When selecting the power supply, in addition to the need to retain 50% of the current margin in accordance with the

recommendations, more attention should be paid to its ripple should not exceed 100mV.
Wireless communication products need to be connected to the impedance matching antenna in order to work

properly, even for a short period of time can not be omitted, if the cause of product damage will not be covered by
the warranty.
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E90-DTU(400SL47) User Manual
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