Ebyte 400SL22P, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL22P)User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co., Ltd.
14
5.3 Frequency and channel numbers
Model No.
Default
Frequency
Frequency Range
Channel
Interval Channel numbers
Hz Hz Hz
E90-DTU(400SL22P
)
433.125M 410.125
～
493.125M 1M 84
，
half duplex
Note: In the same area when multiple data transceivers are communicating one to one at the same time , it is
recommended to set the channel spacing between each group of data transceivers at 2MHz or more.
5.4 Transmitting power
Model No.
22dbm 17dbm 13dbm 10dbm
E90-DTU(400SL22P) Default √ √ √
Note: The lower the transmit power, the closer the transmission distance, but the working current won’t be declined in
exact proportion , it is recommended to use the maximum transmit power.
5.5 Air data rate
Model
Default
Levels
Air data rate (bps)
bps bps
E90-DTU(400SL22P) 2.4k 8 0.3
、
1.2
、
2.4
、
4.8
、
9.6
、
19.2
、
38.4
、
62.5k
Note: The higher the air data rate, the faster the transmission rate, the transmission distance is also closer; when the rate
meets the requirements , the lower air data rate, the better quality.
5.6 Current
Model No.
Tx current mA Stand-by current mA
12V 24V 12V 24V
E90-DTU(400SL22P) 88 46 39 22
Note: It is recommended to retain more than 50% of the current margin when selecting the power supply, which will help
the data transceiver to work steadily for a long time.
5.7 TX and RX FIFO and sub-packing method
Model No. Buffer Sub-packing method
E90-DTU(400SL22P
)
1000 bytes
Can be sub-packed to 32/64/128/240 byte each time
via command
Note: 1. When the receiving data is more than a single packet capacity, the beyond part will be automatically assigned to
the second transmission until it is completed;
2. The data transceiver cannot receive data which is more than the buffer capacity;