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MTA36 User Manual
-23-
transmission speed is 4800 bauds in the air, and you want to receive 20 registers, and
the sending and response time is 200 ms, it is recommended to set a timeout of 200
ms.
On the other hand, it is possible to configure the communication speed between the
module and the computer, choosing the speed; the mode is fixed (N-8-1).
There is a manual configuration mode where you can set the communication
frequency, in MHz, the bandwidth in kHz and the spread spectrum, which indicates the
number of bits used to encode a symbol. The higher the SS, the lower the transfer rate,
but the higher the immunity to interference
A table of the default channel settings is shown below:
Channel
Frequency (MHz)
Spread spectrum
Band width (kHz)
Speed in open air (bps)
Sensitivity (dBm)
1
869.53
7
125
4800
-125
2
871.46
7
125
4800
-125
3
872.91
7
125
4800
-125
4
874.43
7
125
4800
-125
5
875.95
7
250
9600
-122
6
877.48
7
250
9600
-122
7
878.86
7
250
9600
-122
8
880.32
7
250
9600
-122
9
884.87
8
125
2400
-128
10
883.41
8
125
2400
-128
11
884.97
8
125
2400
-128
12
886.58
8
125
2400
-128
13
889.06
12
500
800
-130
14
891.39
12
500
800
-130
15
894.82
12
500
800
-130
16
866.50
7
125
4800
-125