參數(shù)資料
型號: ZL20250LCE
廠商: Zarlink Semiconductor Inc.
英文描述: 2.5G Multimode Transceiver
中文描述: 2.5G的多模收發(fā)器
文件頁數(shù): 12/56頁
文件大?。?/td> 392K
代理商: ZL20250LCE
ZL20250
Data Sheet
12
Zarlink Semiconductor Inc.
time and filtering. This is different to conventional RSSI circuits which operate at typically 450 kHz which is much
easier to filter.
Although the AMPS receive path includes a limiting amplifier, gain control is also required. This is because the band
pass filter has limited dynamic range (50dB). At low signal levels the agc should be set to 1.6 volts to set the gain
20dB below maximum to obtain optimum signal handling and noise performance. At higher signal levels the gain
setting should be reduced to maintain the RSSI level approximately 10dB below maximum. Gain control would be
provided by the baseband controller which would also monitor the RSSI level. Fine gain control is not required and
can be implemented in large steps eg 20dB, allowing the use of a relatively slow gain control loop giving optimum
performance under fading conditions.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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