The various evaluations of the wireless LAN ( 2.4GHz and 5GHz band ) products are performed by this system.
Application
The various evaluations of the wireless LAN ( 2.4GHz and 5GHz band ) products are performed by this system.
Solution
1.Evaluation of handover
![Figure:ハンドオーバー特性評価](/eng/image/application/Evaluation-WLANj-00.jpg)
[Purpose]Relation between receiving signal level and handover occurrence point
- The EUT and the access point (hereafter described as AP) ① are mode in communication.
- The programmable attenuator (hereafter described as P-ATT) ① connected to AP① is gradually increased in the attenuation value and the P-ATT② connected to AP② is gradually decreased. And in the moment the handover occurs, the attenuation value of each P-ATT is recorded.
At the same time, the level of the signal source can be measured by the spectrum analyzer.
2.Evaluation of fallback
[Purpose] Relation between receiving signal level and switching point of effective throughput
- The EUT and the access point are made in communication.
- The attenuation value of the programmable attenuator is gradually increased and the effective throughput of communication is recorded.
- At the same time, the level of the signal source can be measured by the spectrum analyzer.
3.Evaluation of receiving characteristics
* The system construction is same as ” 2. Evaluation of fallback “.
[Purpose] Radio wave strength emitted subordinately
The peak power is measured by transmitting the modulation signal spread in frequency from the EUT and by sweeping the spectrum analyzer.
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