参数资料
型号: SM1212E433
厂商: Semtech
文件页数: 26/77页
文件大小: 0K
描述: RF EVAL FOR SX1212 433MHZ ISM
标准包装: 1
类型: 收发器,ISM
频率: 433MHz
适用于相关产品: SX1212E
已供物品: 模块,天线,电源,软件
SX1212
ADVANCE D COMMUNICATIONS & SENSING
450
400
350
300
250
200
150
100
50
0
Butterworth Filter's BW, FSK
Actual
BW
Theoretical
BW
0
2
4
6
8
10
12
14
16
Val (RXParam_ButterFilt) [d]
Figure 18: Butterworth Filter's Actual BW
Error! Reference source not found. suggests filter settings in FSK mode, along with the corresponding passive
filter bandwidth and the accepted tolerance on the crystal reference.
3.4.6. Channel Filters Setting in OOK Mode
The center frequency, fo, is always set to 100kHz. The following chart shows the receiver bandwidth when
changing RXParam_Butterfilt bits, whilst the polyphase filter is activated.
450
400
350
300
250
200
150
100
50
0
Polyphase Filter's BW, OOK
Actual
BW
Theoretical
BW
0
2
4
6 8 10
12
14
16
Val (RXParam_ButterFilt [d]
RXParam_PolypFilt="0011"
Figure 19: Polyphase Filter's Actual BW
Error! Reference source not found. suggests a few filter settings in OOK mode, along with the corresponding
passive filter bandwidth and the accepted tolerance on the crystal reference.
3.4.7. RSSI
After filtering, the In-phase and Quadrature signals are amplified by a chain of 11 amplifiers, each with 6dB gain.
The outputs of these amplifiers are used to evaluate the Received Signal Strength (RSSI).
3.4.7.1. Resolution and Accuracy
Whilst the RSSI resolution is 0.5 dB, the absolute accuracy is not expected to be better than +/- 3dB due to process
and external component variation. Higher accuracy whilst performing absolute RSSI measurements will require
additional calibration.
3.4.7.2. Acquisition Time
Rev 2 – June 18th, 2009
Page 26 of 77
www.semtech.com
相关PDF资料
PDF描述
SM1230E868 BOARD EVAL XMITTER FOR SX1230
SM16S-CM012-012 SYNJET ZFLOW 50 PWM 12V
SM200P81 RF MODULE 250/500MBPS 2.4GHZ SMA
SM2440G LAMP T2 TELEPHONE SLIDE 24V .04A
SM3020G LAMP T2 TELEPHONE SLIDE 30V .02A
相关代理商/技术参数
参数描述
SM-1220M 制造商: 功能描述: 制造商:undefined 功能描述:
SM12-3/16-BLK-200FT 制造商:SUMITOMO 功能描述:177-10101 SM12 3/16 BLK SPL
SM12-3/4-WHT-200FT 制造商:SUMITOMO 功能描述:SM12-3/4-WHT-200FT 制造商:SUMITOMO 功能描述:177-10189 SM12 3/4 WHT SPL
SM12-3/8-BLK-200FT 制造商:Sumitomo Wiring Systems LTD 功能描述:177-10107 SM12 3/8 BLK SPL
SM1230E868 功能描述:BOARD EVAL XMITTER FOR SX1230 RoHS:否 类别:RF/IF 和 RFID >> RF 评估和开发套件,板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796