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| 型号： | DR-TRC105-372-EV |
| 厂商： | RFM |
| 文件页数： | 52/67页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION 372MHZ RFM RFIC |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 频率： | 365MHz ~ 380MHz |
| 适用于相关产品： | TRC105 |
| 已供物品： | 2 个板，天线，电池 |
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such as the TRC105 ’s data scrambling or Manchester encoding options. The average-referenced threshold run-
ning with a chip rate/ 2*π cutoff frequency is a good choice for the majority of OOK applications.
The peak-referenced threshold is generated from the RSSI signal using a fast attack, slow decay peak detector
emulation. The slicer threshold is immediately set to 6 dB below the peak value of the RSSI signal anytime the
RSSI value exceeds the threshold by 6 dB. The threshold then decays by a configurable dB step when a configu-
rable interval passes without the RSSI signal peaking 6 dB above the threshold. The decay step is configured with
RXCFG15 bits 7..5 as shown in Table 65:
Pattern of Bits 7..5
000
001
010
011
100
101
110
111
Decay Step
0.5 dB
1.0 dB
1.5 dB
2.0 dB
3.0 dB
4.0 dB
5.0 dB
6.0 dB
Table 65
The decay interval is configured with RXCFG15 bits 4..2 as shown in Table 66:
Pattern of Bits 4..2
000
001
010
011
100
101
110
111
Decay Interval
once per chip
once per 2 chips
once per 4 chips
once per 8 chips
twice per chip
four times per chip
8 times per chip
16 times per chip
Table 66
The chip period t CP is equal to the bit period except when Manchester encoding is used. For Manchester encod-
ing, the chip period is equal to ? the bit period:
t CP = 1/BR without Manchester encoding, t CP = 1/(2*BR) with Manchester encoding
Where t CP is in ms and BR is in kb/s. The default values of 0.5 dB per decay step and 1 decay interval per chip
provide a good starting point for most applications. For application environments that contain pulse noise, such as
operation in a band where other FHSS systems are operating, using Manchester encoding and decreasing the
decay interval to twice or four times per chip and/or increasing the decay step to 1 dB will reduce the “blinding”
effect of pulse noise. Multipath flutter tolerance is also improved by using Manchester encoding and decreasing
the decay interval and/or increasing the decay step size.
6.3.3 OOK Transmitter Related Configuration Values
MCFG05 bits 7..6 allow the rise and fall time of the power amplifier regulator to be adjusted. Using the default
component values for R6 and C5 as shown in Figure 2, the rise and fall times for the power amplifier regulator
and the OOK modulation are given in Table 67:
www.RFM.com E-mail: info@rfm.com
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Page 52 of 67
TRC105 - 05/29/13
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| 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 |
| DR-TRC105-390-EV | 功能描述:射频开发工具 TRC105 Evaluation Board 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 |
| DR-TRC105-403-DK | 功能描述:射频开发工具 TRC105 Development Kit 402-407 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-TRC105-403-EV | 功能描述:射频开发工具 TRC105 Evaluation Board 402-407 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-TRC105-434-DK | 功能描述:射频开发工具 TRC105 Development Kit 416-436 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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