'''[wiki:GEC16Agenda/WiMAX-Tutorial/Streamload/07 Previous]'''

== Revise, Repeat ==

After looking at the measurements collected by the 'wxmstat' application, we realize that the signal strength on the nodes is too high. We want a more realistic environment, so we turn down the base station transmit power:


{{{
wget -qO- "http://wimaxrf:5052/wimaxrf/bs/set?bs_tx_power=20"
wget -qO- "http://wimaxrf:5052/wimaxrf/bs/restart"
}}}

He also uses the programmable attenuation on Sandbox 4 to create a situation where signal strength varies over the duration of the experiment. To do this, he adds some properties to the beginning of his experiment:

{{{
!#ruby
defProperty('attUrl', "http://internal2dmz.orbit-lab.org:5052/instr/set?", "Path to use to set attenuation")
defProperty('attenuations' [5,6,7,10,11,12,15,16,14,18,12,8,5,3], "List of attenuations to use")


}}}

'''[wiki:GEC16Agenda/WiMAX-Tutorial/Streamload/09 Next]'''