INTERNAL TONE SQUELCH

Transmitters and Receivers Glossary

Transmitters and Receivers — Internal Tone Squelch

 

 

 

 

 

 

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Information on Internal Tone Squelch

One of the problems with external-tone squelch is that the transmitter and receiver must both use the same squelch technique because the receiver ignores any signal that does not have the 150-Hz tone. Internal-tone squelch avoids this problem by placing the onus for squelch on the receiver only. In the receiver, the LO frequency is FM-modulated by an 85-Hz tone before it is mixed with the incoming signal. Now, the 85-Hz tone will only be present after the detector if a wanted signal is present at the mixer.


Other topics in our resources on Transmitters and Receivers related to Internal Tone Squelch include: 
 
  • squelch
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  • noise squelch
    		•
  • external tone squelch

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