FCC Logo - Return to the FCC Home Page  
Skip Primary FCC Navigation Links FCC Home | Search | Updates | E-Filing | Initiatives | For Consumers | Find People   
Audio Division                                                                   Find Values (Conversions)
 (202)-418-2700   FCC > MB > Audio Division > Find Values (Conversions)       Skip Breadcrumb Site Navigation Links FCC site map

 

Conversions:

  • FM Channel to Frequency
  • FM Frequency to Channel
  • TV Channel to Frequency Band
  • Feet to/from Meters
  • Miles to/from Kilometers
  • Field Strength Units: dBu to/from mV/m
  • Power Units: kW to/from dBk
  • Power: Relative Field
  • Transmission Line Efficiency (FM broadcast band only)
  • Electrical Degrees To/from Meters
  • Degrees Minutes Seconds to Decimal Degrees
  • Decimal Degrees to Degrees Minutes Seconds
  • Hexadecimal RGB Color -- View HTML Color

    • The conversions below require Javascript to function.

    FM and TV Channel / Frequency conversions

    FM Channel to Frequency

    Frequency:


    Frequency to FM Channel Number

    MHz
    Channel:


    TV Channel to Frequency Band

    Band:


    Metric / English distance conversions

    Feet To/From meters


    meters = feet * 0.3048     feet = meters / 0.3048


    Miles To / From Kilometers

     

    kilometers = miles * 1.609344     miles = kilometers / 1.609344


    Field Strength -- dBu to / from mV/m


    mV/m = 10(dBu/20) / 1000.     dBu = 20 log10 ((mV/m) * 1000.)
    The factor of 1000 is used to convert millivolts per meter to microvolts per meter.

        Common FCC-Defined Equivalent dBu and mV/m Values
        dBu
        (dB above 1 microvolt
        per meter (uV))        		 mV/m
        (millivolts per meter
        electric field strength)
        100 dBu 100 mV/m
        80 dBu 10 mV/m
        70 dBu 3.16 mV/m
        60 dBu 1.0 mV/m
        54 dBu 0.5 mV/m
        40 dBu 0.1 mV/m
        34 dBu 0.05 mV/m
        28 dBu 0.025 mV/m
        Note: Higher field strength values are found closer to a transmitter site. For FM and TV field strengths and distances, use the propagation curves program.

    Power

    kW (kilowatts) to / from dBk (dB kilowatts)


    kW = 10(dBk / 10)     dBk = 10 log10 (kW)


    Relative Field Values for Directional Pattern


         
         
             

    Radial ERP = (Maximum ERP) * (relative field)2


    Transmission Line Efficiency -- Computed values are valid for the FM radio band only.
    -- This function does not cover all cable types.

    meters

    efficiency (as decimal) = 10-[(dB/100 feet) * (length in meters)] / [1000 * 0.3048]
    where dB/100 feet is the manufacturer's value for the attenuation in the cable.


    Electrical Degrees to/from Meters


    Necessary Parameters:

    kHz
        Meters per wavelength
        at this frequency (computed):

    		 meters per wavelength
    Electrical Degrees to Meters



    		 electrical degrees
    meters
    wavelengths

    Meters to Electrical Degrees



    		 meters
    electrical degrees
    wavelengths



    wavelength (m) = [speed of light (m/sec)] / [frequency (Hz = cycles/sec)]
    where speed of light = 2.99792456 * 108 meters/second

    360 electrical degrees = 1 wavelength


    Degrees Minutes Seconds to Decimal Degrees

      
      
       
    Results:  Latitude:   Longitude:           

    Decimal Degrees to Degrees Minutes Seconds

     
       
    Results:  Latitude:   Longitude:           


    Hexadecimal RGB Color -- View HTML Color



      Enter hexadecimal RGB color:           

      Valid hexadecimal (base 16) numerals are 0 through 9 and A through F. 00 = dark, FF = light.

      View adjacent colors to in COLORIT in a new browser window.

    Skip Bottom FCC Navigation Links and Contact Info FCC Home | Search | Updates | E-Filing | Initiatives | For Consumers | Find People
    Please send comments via standard mail to the Federal Communications Commission, Consumer and Governmental Affairs Bureau, 445 12th Street, S.W., Washington, D.C., 20554. Questions can also be answered by calling the FCC's National Call Center, toll free, at 1-888-Call FCC (1-888-225-5322).

    Skip FCC Footer and Contact InfoFederal Communications Commission
    445 12th Street SW
    Washington, DC 20554
    More FCC Contact Information...
    Phone:  1-888-CALL-FCC (1-888-225-5322)
    TTY:  1-888-TELL-FCC (1-888-835-5322)
    Fax:  1-866-418-0232
    E-mail:  fccinfo@fcc.gov
    - Privacy Policy
    - Website Policies & Notices
    - Required Browser Plug-ins
    - Freedom of Information Act