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

    • The conversions below require Javascript to function.

     

    FM and TV Channel / Frequency conversions

     

    FM Channel to Frequency:    
       Enter Channel: 
      Frequency:  MHz
       


    FM Frequency to Channel Number:  
       Enter Frequency: 
      Channel:
       


    TV Channel to Frequency Band

      Enter TV Transmit Channel: 
    (2 to 69)
    Band:   MHz
       

     

    Metric / English distance conversions

      Feet To/From meters
      Enter the distance
    Select meters or feet     		  
    Result:
       

    meters = feet * 0.3048     feet = meters / 0.3048


    Miles To / From Kilometers

      Enter the distance
    Select miles or km     		  
    Result:
       

    kilometers = miles * 1.609344     miles = kilometers / 1.609344

     

    Field Strength -- dBu to / from mV/m

     
      Enter field strength 
    Select mV/m or dBu    		  
    Result: 
       

    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)

       

        Enter power value 
      Select kilowatts or dBk       		   
      Result:
         

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

       


      Relative Field Values for Directional Pattern

       
        Enter the maximum ERP, in kW       
        Enter the radial ERP in kW, 
        or relative field value (0.000 to 1.000) 
      Select Relative Field or Radial ERP
      Result:  
         

      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.

       

        FM Channel number (200 to 300): 
       
        meters
      Result:  
         

      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:           
       

      AM Wavelength, given Frequency

       
      Enter AM Frequency in kHz: 
      (1000 kHz = 1 MHz)       		  kHz


      		Results:

      meters in wavelength
      Speed of light = (frequency) * (wavelength), where frequency is in Hz, wavelength in meters, and speed of light = 2.99792458 * 108 meters/second.

      Bureau/Office: 
      Media
      Tags: 
      Data - Data, Maps, Reports - Digital Television - FM Radio - Low Power FM - Radio - Television

      Updated: 
      Wednesday, June 15, 2016