Introduction

The activity was a hands on demonstration on the effects of physical and environmemntal conditions on wifi links. This demo was performed using a Metrix box linked to a wifi client over approx. 20m link. The link distance being short a step attenuator was used to simulate a longer hop distance. A 14.5 dBi gain Yagi antenna was used at the Tx while an 8.5 dBi directional panel was used at receiver. A portion of the received signal was tapped into a spectrum analyser using a directional coupler. At the receiver end Netstumbler tool was used to measure link performance in respect of the received signal strength indication (RSSI). The net objectives of this activity was to:

Methodology

Recorded results

Variances in RSSI were recorded with different obstructions introduced over the path as follows:

Conclusions