http://www.phonic.com/en/paa3.html

http://www.mcmelectronics.com/content/ProductData/Manuals/72-7480.pdf

http://www.ampetronic.com/Products/testing_equipment/FSM-Field-Strength-Meter/FSM http://www.ampetronic.com/Products/testing_equipment/ILR3-Audio-Induction-Loop-Receiver/ILR3 http://www.canford.co.uk/Products/25-592_LOOPCHECK-INDUCTION-LOOP-METER

NTi Minirator Pro

http://www.bytebrothers.com/ http://www.bytebrothers.com/bb_pdf/TVR1000_RS.pdf http://www.youtube.com/watch?v=_P0TAw5R1_8