Ebyte 400SL37, User Manual

Page: 11 / 25

Chengdu Ebyte Electronic Technology Co., Ltd.
E90-DTU SL User Manual
Copyright©2012–2021
ChengduEbyteElectronicTechnologyCo,;Ltd
11
5.3 Frequency and channel numbers
Model No.
Default Frequency Frequency Range
Channel
Interval
Channel numbers
Hz Hz Hz
E90-DTU(400SL
37)
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 Air data rate
Model
Default
Levels
Air data rate (bps)
bps bps
E90-DTU(400SL37) 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.
5.5 Current
Model
TX current mA Standby current mA
12V 24V 12V 24V
E90-DTU(400SL37) 1100 586 50 27
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.
5.6 TX and RX FIFO and sub-packing method
Model No. Buffer Sub-packing method
E90-DTU(400SL37) 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 can not receive data which is more than the buffer capacity.