Shenzhen KYL Communication Equipment Co., Ltd
Shenz
Co.
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 resent the wrong
information while using KYL-300I modules.
d. Large-number data transmission
In theory, when the interface data rate is faster than the RF data rate, KYL-300I
transceivers can sent unlimited-long data package, but any long packages more
than 120B are not recommended. The length of each package should be between
60~100B. We also recommend user to resent the wrong information using
Automatic Error Request Equipment (ARQ).
The analyzing as below:
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
packets are sent, there will be only 1 packet wrong according to this probability.
After that, resend this wrong packet using ARQ mode. So by resending one more
packet and the efficiency rate is reduced 10%, all data will be absolutely received
correctly.
Fax: +86-0755-83408785
kyl03losia@gmail.com
www.rf-data.com
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KYL [ SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD. ]
