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   AMATEUR_RADIO      Ham radio for when Armageddon strikes      2,531 messages   

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   Message 1,246 of 2,531   
   Tony Langdon to Holger Granholm   
   Re: Conversion up or down?   
   05 Sep 16 08:56:00   
   
   -=> Holger Granholm wrote to Richard Menedetter <=-   
      
    HG> So, finally it all depends upon from which viewpoint you look at it.   
      
   No, it's simple.  If the output frequency is lower than the input (e.g. 1296   
   MHz in, 28 MHz out), then it's a downconverter.  If the output frequency is   
   higher than the input frequency (e.g. 136 kHz to 3.5 MHz), then it's an   
   upconverter.   
      
   That rule works whether you're transmitting or receiving.   
      
   So the "Ham It Up" and other converters used to receive HF on a RTL-SDR dongle   
   are up converters, since they convert the 0-24 MHz range into something higher   
   than the stick can receive.   
      
      
   ... Don't Panic! It's only ones and zeros.   
   --- MultiMail/Win32 v0.49   
    * Origin: Freeway BBS - freeway.apana.org.au (3:633/410)   

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