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| 型号： | DR-TRC105-315-EV |
| 厂商： | RFM |
| 文件页数： | 13/67页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION 315MHZ RFM RFIC |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 频率： | 310MHz ~ 319.5MHz |
| 适用于相关产品： | TRC105 |
| 已供物品： | 2 个板，天线，电池 |
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Figure 7
As shown in Figure 7, the demodulator section includes the FSK demodulator, the OOK demodulator, data and
clock recovery and the start pattern detection blocks.
If FSK is selected, the demodulation is performed by analyzing the phase between the I and Q limited signals at
the output of the base-band channels.
If OOK is selected, the demodulation is performed by comparing the RSSI output value stored in RXCFG14_
RSSI[7..0] register to the threshold which can be either a fixed value or a time-variant value depending on the
past history of the RSSI output. Table 9 gives the three main possible procedures, which can be selected via the
register MCFG01_RX_OOK[3..2] :
Mode
Fixed Threshold
Peak
Average
MCFG01_RX_OOK[3..2]
00
01
10
Description
RSSI output is compared with a fixed threshold stored in
RXCFG13_OOK_thresh
RSSI output is compared with a threshold which is at a fixed offset
below the maximum RSSI.
RSSI output is compared with the average of the last RSSI values.
Table 9
If the end-user application requires direct access to the output of the demodulator, then the RXCFG12_DCLK_
Dis[6] bit is set to 1 disabling the clock recovery. In this case the demodulator output is directly connected to the
DATA pin and the IRQ1 pin (DCLK) is set to low.
For proper operation of the TRC105 demodulator in FSK mode, the modulation index β of the input signal should
meet the following condition:
β =
2*F DEV
≥ 2
BR
where F DEV is the frequency deviation in hertz (Hz) and BR is the data rate in bits per second (b/s).
www.RFM.com E-mail: info@rfm.com
? 2009-2013 by RF Monolithics, Inc.
Technical support +1.800.704.6079
Page 13 of 67
TRC105 - 05/29/13
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| DR-TRC105-345-DK | 功能描述:射频开发工具 TRC105 Development Kit 342-348 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| DR-TRC105-345-EV | 功能描述:射频开发工具 TRC105 Evaluation Board 342-348 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| DR-TRC105-372-DK | 功能描述:射频开发工具 TRC105 Development Kit 365-381 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| DR-TRC105-372-EV | 功能描述:射频开发工具 TRC105 Evaluation Board 365-381 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| DR-TRC105-390-DK | 功能描述:射频开发工具 TRC105 Development Kit 382-398 MHz RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
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