[wiki:Documentation Back] = Centralized Arbitrary Noise Injection Subsystem = This subsystem consists of a central arbitrary waveform generator (Agilent ESG) connected to four distribution antennas through a RF switch. Using this subsystem, users can inject ''individually'' controllable noise into the ORBIT grid using the antennas. == Webservice commands == {{{ Interference injection control service Configures interference injection singal type to AWGN Resets interference injection subsystem to default state Set global interference injection parameters Turn on interference injection Show current status of the interference injection subsystem Turn off interference injection }}} == Example == To set AWGN on channel 36 at -30 dBm on antenna1 use the following commands (either through a browser or '''wget''') * Step 1: Select AWGN bandwidth (channel bw for 802.11a/b/g is 20 Mhz) * {{{ wget http://instrument1.orbit-lab.org/awgn?bandwidth=20 }}} * Step 2: Set power level to -30 dBm * {{{ wget http://instrument1.orbit-lab.org/set?power=-30 }}} * Step 3: Set channel number to 36 * {{{ wget http://instrument1.orbit-lab.org/set?bchannel=36 }}} * Step 4: Start RF injection * {{{ wget http://instrument1.orbit-lab.org/start }}} At the end of the experiment, * Step 4: Stop RF injection * {{{ wget http://instrument1.orbit-lab.org/stop }}}