Shenzhen KYL Communication Equipment Co., Ltd
Shenz
Co.
bit received by RxD.
As data processing will be made on user’s data by KYL-210 transceiver using
FEC (Forward Error Correction) or other correction algorithm, when RxD of a
KYL-200L transceiver ‘A’ receives the data, then transmits it, the other one
transceiver ‘B’ will have a delay (ts) to receive and transmit by TxD. Different
RF data rate causes different delay time. Please see the specific delay time
below:
RF Date Rate
(bps)
1200
2400
4800
Delay
Ts(mS)
90
48
30
RF Date Rate
(bps)
9600
19200
Delay
Ts(mS)
16
10
Timing diagram:
c. Error dealing procedure:
To enhance the reliability and stability of user’s systems, a verify bit or a Cyclic
Redundancy Check (CRC) mode is highly recommended to prevent wrong
information while using KYL-210 modules.
d. Large-number data transmission
In theory, when the interface data rate is faster than the RF data rate, KYL-210
transceivers can sent unlimited-long data package, but long packages more than
120B are not recommended. The length of each package should be between
60~100B. We also recommend our users to use Automatic Error Request
Equipment (ARQ) to prevent wrong information.
Reasons :
Reasons:
What if the actual transmission BER (Bit Error Rate) is 10
-4
, 1 packet with 1KB
data which is about 10-thousand bits, is sent, theoretically, at least 1 bit will be
received wrongly, then the 1KB information will never be received correctly.
But if we package the data into 10 packets with 100B for each, when all 10
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KYL [ SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD. ]
