The picture you selected was of an MDR-8000 Carrier Class microwave from one of the sites for our microwave backhaul. The card missing is actually an open slot to add a special card for SNMP tracking of the alarms on these devices. I have taken some time at learning how these operate and have repaired sites that had been down for 4 years or more. These wonderful pieces of equipment have a history in aiding AT&T at getting over the mountains in many states and I was notified that they are also in use throughout the State of Colorado. Nokia would like us to purchase the new 9500 and after I leave the State may have to resort to this since I am the only person currently with experience.

• http://www.radiomagonline.com/misc/0082/obtaining-elevation-profiles-with-google-earth/35757
• https://oeaaa.faa.gov/oeaaa/external/searchAction.jsp

• http://freegeographytools.com/2007/mapping-radio-coverage-and-viewing-it-in-google-earth
• http://ham.stackexchange.com/questions/1921/how-do-i-make-a-rf-propagation-map-for-a-repeater
• http://forums.radioreference.com/industry-discussion/182774-using-gis-rf-coverage.html

• https://www.fcc.gov/
• http://wireless2.fcc.gov/UlsApp/AsrSearch/asrRegistrationSearch.jsp
• https://www.ntia.doc.gov/files/ntia/publications/january_2016_spectrum_wall_chart.pdf
• http://www.radioreference.com/apps/db/

• http://cdn2.hubspot.net/hub/316692/file-595889291-jpg/common_sources_of_interference-1.jpg
• https://public.nrao.edu/telescopes/radio-frequency-interference
• https://science.nrao.edu/facilities/vla/docs/manuals/obsguide/modes/rfi
• http://www.radioing.com/eengineer/index.html
• 
  

Incidental

• https://www.ncdc.noaa.gov/stormevents/
• http://prop.hfradio.org/

Large Intentional

• https://oeaaa.faa.gov/oeaaa/external/gisTools/gisAction.jsp?action=showWtBuildOutToolForm
• https://oeaaa.faa.gov/oeaaa/external/gisTools/gisAction.jsp?action=showLongRangeRadarToolForm

Small Intentional

• http://randombio.com/interference.html
• http://www.randombio.com/fluorescent-lamp-interference.html
• https://superuser.com/questions/637594/why-does-my-microwave-kill-the-wi-fi

Unintentional

• http://www.dieselduck.info/machine/03%20electricity/radio_interference.htm

Solutions

• https://dl.cdn-anritsu.com/en-us/test-measurement/files/Application-Notes/Application-Note/11410-00388.pdf
• http://audiosystemsgroup.com/RFI-Ham.pdf
• https://www.jmu.edu/wmra-eng/archive/tvibook.html
• http://www.svconline.com/news/news/understanding-and-controlling-rf-interference/364849
• 
  

• http://www.radio-electronics.com/info/propagation/path-loss/free-space-formula-equation.php

http://www.arrl.org/files/file/RFI/FOESTER.PDF

http://urgentcomm.com/