Radios Explained: What the heck is squelch anyway?

If you don't know anything about how two-way radios work, here is a run down on the concept of what squelch is, how it works, and how to use it.

[@jlars972]

Great explanation. Clear , concise and easy to follow. Thanks for this and will look forward to more.

[@arviahouse]

Of all the videos and googling I did your explanation of squelch was the best. I like the visual of the squelch line. That gives me a much better understanding of squelch. Thank You Much.

[@trials_bike-xu3xf]

This video helped me so much. Thank you! All the other explanations I can find are just basic overview not an in depth explanation on how it all works

[@TomtheDilettante]

Good stuff! Great explanation. thanks for sharing!

[@JaraFPV]

thumbs up for explaining what squelch is!! thank you very much! It's actually easier to learn with UI

[@spikec175]

Thanks, I'm going to learn a lot for you. I'm just getting into this!

[@1life1fire]

Excellent visual learning experience... Thank You Sir!

[@AbcXyz-rn2lz]

A related video: RF Gain using same spectrum visual. RF gain will make everything on that spectrum analyzer bigger, basically, and turning it down would reduce RX power to the point only a tall spike would get through the rx circuit

[@craiggillphotography8030]

Excellent explanation 👍

[@hermannel1310]

Very informative video! thank you. Just to get clarity, when the squelch "opens" for the signal to come through, does that mean that the squelch is then disabled for the duration of the signal coming through ? or is only the part above the noise floor coming through? Thank you.

[@luardelchico5769]

That was really good!

[@Puceter]

good job explaining it!

[@cipher2]

excellent!

[@maxwarfield6699]

Hello, Great video! Was wondering, how you set-up the "oscilloscope" to show both the noise-floor and those stronger signals. I'm an electronics-enthusiast, but I am also a NOOB. I just recently acquired an old Bearcat radio scanner and I also have a cheap Mustool multimeter/oscilloscope-thing, it's really more of a waveform display. Anyhoo, I was wondering how I could set these two devices, to reproduce your set-up. Where should I connect the probes? Any insight will be appreciated. Make more videos. Thank you kindly

[@VariableThisIsKnife]

I've never used an oscilloscope my self, as I mentioned in response to another comment, the "spectrum analyzer" I used is actually a software defined radio program called "SDR# or " SDRsharp", and has a great visualization feature to illustrate what it's receiving.

[@fishinmagician153]

my scanner works fine for a while,then nothing but static is my squelch out or something blocking my signal,it is a old uniden bearcat BC350C

[@charlschuck6]

Wow I learn something 2021 the audio guys at the store didn’t had a clear idea what squelch did in microphone receivers , now I understand perfectly it’s all about the frequencies a world we can’t see hehe but is there I might get a scanner later on , I had some issues with the mic giving static noise randomly and I change the channel before the event but then that noice came in when there was no one talking in the mic and we are talking about 500-590mhz range I heard in California the government is using 600mhz for some tv transmission or something like such so yeah I’ll be playing around with the squelch to avoid this noise , so it’s best to raise up that level for example instead of -5 to be 0 or 7? Also I noticed when I took this mic away from the transmitter I got that noise again and it was just 11-15feet max apart we are talking about a senheiser wireless mic system xsw1 system . I prefer shure but we work for what we have …

[@charlschuck6]

One question since this is radio frequency will this happen if I get a 2.4Ghz microphone or it’s digital and I might have less or more problems w reception ? Since phones and wifi interfere in events loaded with cellphones hehehe

[@oliverpisco3115]

good day!! very nice video.. i would like to ask if what device do you use to measure noise level in your surrounding?? TIA!!!

[@VariableThisIsKnife]

If I'm understanding your question correctly, the software I used to illustrate the EM signal vs. noise in this video is a free program called SDR# or SDRsharp, which you can search for online to find plenty of information about it.

[@miguelluigisantoslopes1528]

So its basically a noise gate , but for radio signal