Intro:

The test:

    The test setup was:

• position azimuth=100, za=18 deg. The cband azimuth spins showed this to be a peak for many of the 5 ghz transmissions below 5150.
• The mock spectrometer was set for:
• 7 bands, 8192 chan/band, 172Mhz, 1 second intergrations.
• The band center frequencies were:4900,5000,5100,5200,5300,5040,5500
• Note that band 5 was a typo.. it was supposed to be 5400.. but i typed in the wrong value.. so i skipped displaying this band
• The mock spectrometer was run continuously during the test.
• We communicated the the tower engineer over the phone
• He turned off each internet provider for about 1 minute, then turned them back on
• turning off was fast, turning back on took up to a minute.
• he turned off the following providers:
• DM wireless
• kxXpressNet
• 4Net
• SecureNet
• DM wireless (we repeated this one)

Dynamic spectra of the test

    Dynamic spectra were made for each of the 6 mock bands. The computation was:

• Input the 1500 secs of data
• average the polarizations
• flatten the spectra using the median bandpass for the 1500 secs
• for each freq range, find about 500 channels that did not have rfi in them
• average over these channels and then divide each of these 1500 numbers into the flattened spectra
• this removes the total power variation from the sky.
• Draw a horizontal line where each turn off occurred..label the lines with the provider
• The off cycle normally lasted for 60 seconds.

The dynamic spectra are show in the table below:

Summary:

    The current status of illegal 5ghz usage is:

• Angel contacted the owner of dm wireless on 29jan16. He said he would look into turning off the illegal transmissions.
• We need to report this to the fcc..