Interference Hunter
Interference Hunter provides technical information on how to track down 
interference. This App provides information on what signals are expected
 in various portions of the spectrum, including  Utilities such as 
'Frequency Lookup', 'Harmonic Calculator' and a pdf of the US Spectrum. 
 Screen shots provide a quick reference for use in the Field including 
pictures of various types of common interference.  Interference Hunter 
can also provide information on how to use Rohde & Schwarz equipment
 for Interference Hunting, product specifications, and support line 
contact information.