RIM 1802G, Руководство интегратора

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Chapter 1: The RIM OEM Radio Modem for GSM/GPRS Wireless Networks
16 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Receiver sensitivity
Receiver sensitivity is a measure of how well the radio modem can receive and decode data from a
network base station. This figure is important when a device is used in areas where signal strength
is weak, such as inside buildings and in locations that are not close to a base station. A radio modem
with good receiver sensitivity can be used in more places than a radio modem with poor receiver
sensitivity.
The RIM 1902G and RIM 1802G typically have receiver sensitivities of -107 dBm with a 2.2439% bit
error rate (BER).
Noise immunity
The RIM 1902G and RIM 1802G are not desensitized by the electromagnetic interference (EMI) or
“noise” that is generated by the electronics of the terminal into which it is integrated. As a result, no
special shielding is required between the radio and your device.
Noise immunity offers several key benefits:
• easier integration
• longer battery life
• increased reliability
• improved RF performance
• more coverage from each base station
• no need for special RF shielding
Note: BER is an industry standard error rate that is used to define sensitivity; it does not indicate that 2.2439%
of the data that is passed by the radio to the application is corrupted.