KYL-200U Просмотр технического описания (PDF) - SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD.
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KYL-200U Datasheet PDF : 15 Pages
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Shenzhen KYL Communication Equipment Co., Ltd
RF Date Rate
(bps)
1200
Delay
Ts(mS)
90
2400
48
4800
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-200L modules.
d. Large-number data transmission
In theory, when the interface data rate is faster than the RF data rate, KYL-200U
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:
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.
10. Antenna configuration:
Many appropriative antennas for low power RF modules are selected to meet
different users’ antenna configurations. Please ask our Sales for more information
about the antenna’s dimension and performance.
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