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| 型号： | DR-TRC103-915-EV |
| 厂商： | RFM |
| 文件页数： | 47/65页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION 915MHZ RFM RFIC |
| 标准包装： | 1 |
| 类型： | 收发器，SRR |
| 频率： | 902MHz ~ 928MHz |
| 适用于相关产品： | TRC103-915 |
| 已供物品： | 2 个板，天线，电池 |
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Pattern of Bits 3..1
000
001
010
011
100
101
Transmitter Power
11 dBm
8 dBm
5 dBm
2 dBm
-1 dBm
-4 dBm
Table 56
The highest power setting allowed is usually chosen unless the application operates at short range and minimum
DC power consumption is critical. The 950-960 MHz band is a developing RFID allocation where regulations are
still under refinement. Consult the latest regulations for this band when developing a 950-960 MHz application.
6.3 Determining Configuration Values for OOK Modulation
6.3.1 Bit Rate Related OOK Configuration Values
The TRC103 supports RF bit rates (data rates) from 1.5625 to 33.33 kb/s for OOK modulation. As with FSK mod-
ulation, there are several considerations in choosing an OOK data rate. The sensitivity of the TRC103 decreases
with increasing bit rate. A bit rate should be chosen that is adequate but not higher than the application requires.
The exceptions to this rule are when the TRC103 is operated as a frequency hopping spread spectrum transceiv-
er. In the case of frequency hopping, running at a higher bit rate will allow a higher channel hopping rate, which
provides more robust operation in a crowded band in trade-off for less range under quiet band conditions.
The TRC103 RF bit rate is set by the value of the byte loaded in MCFG03 . For the standard crystal frequency
of 12.8 MHz:
BR = 12800/(64*(D + 1)), with the usable range of D for OOK 5 to 127
Where BR is the bit rate in kb/s and D is the integer stored in MCFG03 . This configuration value supports both the
data and clock recovery circuit in the receiver and the bit rate clocking in the transmitter modulator. Solving the
equation above for D:
D = (12800 - 64*BR)/64*BR
D must be an integer value, so BR is limited to 123 discrete values for OOK. If the value of D given in the above
equation is not an integer for your desired bit rate, round the value of D down to the nearest integer. You can then
calculate the nearest available bit rate equal to or greater than your desired bit rate.
In OOK mode, the second IF frequency F IF2 is normally set to 100 kHz. The discussion in the rest of this section
assumes F IF2 is 100 kHz.
Once BR and F IF2 have been determined, the bandwidths and related configuration values for the TRC103 filters
can be determined. The recommended 3 dB bandwidth for the transmitter anti-aliasing filters is:
F CTX = 3*F IF2 = 300 kHz
F CTX is configured with bits 7..4 in TXCFG1A and the byte in RXCFG13 . For the standard crystal frequency
of 12.8 MHz:
F CTX = 200*(K + 1)/(F+1), with K in the range of 0 to 15
Where F CTX is the 3 dB bandwidth of the transmitter anti-aliasing filters in kHz, K is the integer value of the bit pat-
tern in TXCFG1A bits 7..4, and F is the integer value of the bit pattern in RXCFG13 , which has a default value of
7. Assuming this default value of F is used, the equation for determining K is:
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Page 47 of 65
TRC103 - 11/29/12
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相关代理商/技术参数 |
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|---|---|
| DR-TRC103-950-DK | 功能描述:KIT DEV 950MHZ RFIC SRR 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 |
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| DR-TRC104-2400-DK | 功能描述:射频开发工具 TRC104 Development Kit 2.4 GHz 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-TRC104-2400-EV | 制造商:RFM 功能描述:BOARD EVALUATION 2.4GHZ RFM RFIC |
| DR-TRC105-304-DK | 功能描述:射频开发工具 TRC105 Development Kit 303-307 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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