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| 型号： | ATREB232ED-EK |
| 厂商： | Atmel |
| 文件页数： | 16/40页 |
| 文件大小： | 0K |
| 描述： | AT86RF232 EVAL KIT |
| 产品培训模块： | AT86RF232 Low Power 2.4 GHz Wireless Transceiver |
| 标准包装： | 1 |
| 类型： | 收发器，微控制器 |
| 频率： | 2.4GHz |
| 适用于相关产品： | AT86RF232 |
| 已供物品： | 4 块板，电池，电缆，文档 |
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Figure 5-7. Board layout – transceiver RF tuning.
During tuning, the best compromise in between RX and TX performance has to be
found. Tuning should be done for the receiver first.
First step should be to verify the 50 ? matching at U1, pin 5. After that, the capacitor
position and value can be slightly varied. The reception performance should be
measured using a packet error test. Typical tuning capacitor values are 1pF ±0.5pF.
To simplify the tuning, the receiver input power should be adjusted to a value where a
PER of ~1% can be measured. For the measurement 5000 to 10.000 Frames should
be used to get a clear PER value. After a board tuning change the PER should be
measured with the same environment as before. Now the new sensitivity can be
evaluated based on a simple rule of thumb. A PER change by one decimal power
(from 1% up to 10%, or down to 0.1%) corresponds in average with a 1dB change in
sensitivity. The tuning measurements have to take the whole frequency band into
account.
The matching point for best sensitivity can, but may not be identical with the best S11
matching point. The matching point for the lowest noise figure will be different from
the best S11 matching point that can be measured.
When satisfying reception sensitivity was achieved, the transmitter performance
should be tested. Main parameters are transmitting power, EVM, spurious emissions
and performance flatness over the whole frequency band.
5.7 Ceramic antenna
5.7.1 Antenna design study
Part of the diversity board development was the evaluation of the antenna setup. A
dedicated board was designed to determine the key design parameters for a diversity
antenna configuration.
16
Atmel AVR2092
8427A-AVR-10/11
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| ATREB233SMAD-EK | 功能描述:射频开发工具 AT86RF233 evaluation kit 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 |
| ATREB233-XPRO | 功能描述:XPLAINED PRO EXT REB233 制造商:atmel 系列:Xplained Pro 零件状态:有效 类型:收发器 频率:2.4GHz 配套使用产品/相关产品:AT86RF233 所含物品:板 标准包装:1 |
| ATRF231USB-RD | 制造商:Atmel Corporation 功能描述:AT86RF231 AND CORTEXM3 USB STICK - Boxed Product (Development Kits) 制造商:Atmel Corporation 功能描述:AT86RF231 and CortexM3 USB stick |
| ATRF4CE-EK | 功能描述:开发板和工具包 - 无线 RF4CE evaluation kit RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| ATRJ8-FSSR | 制造商:Amphenol Sine Systems 功能描述:RJ PLUG, FIELD SLD STRN RELIEF |
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