I'd like to say that this cleared it all up, but, unfortunately, I'm still scratching my head and staring at my radio like a big dummy. Thanks for the video
It’s still a very difficult concept, trying to explain there is something (a carrier signal) when there’s nothing (no transmission). I am looking forward to experimenting as my next radio has SSB.
it's like shoveling heavy snow with a 2x12x8ft board. use the 8ft is AM. Can't get real far. ssb is like using the end of the board. less to push, more available power.
Very nice explanation Gilles. Now, if the SSB is so efficient, why AM (DSB+Carrier) does still exist? Likely, because the receivers are simpler than those needed to demodulate SSB. Therefore, the extra cost paid by the broadcasting stations make it possible to reach more people. ;-)
@@zach0gr I was using the AM as Amplitude Modulation acronym in the most general term, and not referring specific modulation type. I think anyway that it can be understood but I will add another comment clarifying it a little bit more.
SSB is harder to tune "exactly." With AM, the receiver can be tuned slightly offset from the carrier frequency with minimal effect, since the carrier itself is being used to demodulate the signal. With SSB, you need to have your injected carrier precisely where the carrier would be if it were transmitted to get perfect demodulation. Since most receivers have a minimum tuning step it might not be possible, resulting in some distortion. In most cases this is not much of an issue, but with music e.g. it can make a difference. Also, in SSB if the frequency is drifting you need to constantly retune.
Is the reason that all SW radios cannot allow us to hear SSB signals solely because most radios lack the capability to move in 1 kHz tuning increments, or is there more involved than just that, Gilles? If that is all, one would think every vintage SW radio with linear tuning would get SSB when tuned finely. Thank you.
In AM the carrier itself is being used to demodulate the signal. In SSB the carrier is not present, so the receiver must produce its own "carrier" via a beat frequency oscillator. This makes SSB receiver more complicated and expensive.
@@scottcranston7469where do I learn what all of what you said means? I don’t understand any of it. I was installing radios and antennas at work for our power company and I thought that I needed to learn about them but I retired. We did a large variety of things so we had occasional gaps in our knowledge. The variety was nice though but sometimes we got spread too thin with all of the new technology we were working with. Thanks
I didn’t understand what he was talking about. I was shopping for a new radio that has SSB and I wanted to see what it was. I don’t understand it but it must be ok.
only on the 10 meter amateur radio band, it is not used because it takes too much space on the spectrum and would have reduced the number of stations that can be on a given frequency range
I'd like to say that this cleared it all up, but, unfortunately, I'm still scratching my head and staring at my radio like a big dummy. Thanks for the video
This makes more sense than the 12 people and 5 books that I have been through trying to understand SSB. Many many thanks to you!
It’s still a very difficult concept, trying to explain there is something (a carrier signal) when there’s nothing (no transmission). I am looking forward to experimenting as my next radio has SSB.
it's like shoveling heavy snow with a 2x12x8ft board. use the 8ft is AM. Can't get real far. ssb is like using the end of the board. less to push, more available power.
This was the clearest explanation I have heard but let's make sure I got it right. What I heard is that SSB is STILL AM but without the carrier.
It's SSB AM would have a carrier already, think about it as a AM signal that was stripped from its Carrier. You now have SSB
@@OfficialSWLchannel But SSB is still uses Amplitude Modulation correct?
Perfect info!
Thanks
Great explanation, Gilles! Thank you. :)
Keep it up thanks for all the great videos!
Very nice explanation Gilles. Now, if the SSB is so efficient, why AM (DSB+Carrier) does still exist? Likely, because the receivers are simpler than those needed to demodulate SSB. Therefore, the extra cost paid by the broadcasting stations make it possible to reach more people. ;-)
@@zach0gr I meant DSB+Carrier. I forgot to add the carrier. That is, the type of modulation used on MW.
@@zach0gr I was using the AM as Amplitude Modulation acronym in the most general term, and not referring specific modulation type. I think anyway that it can be understood but I will add another comment clarifying it a little bit more.
SSB is harder to tune "exactly." With AM, the receiver can be tuned slightly offset from the carrier frequency with minimal effect, since the carrier itself is being used to demodulate the signal. With SSB, you need to have your injected carrier precisely where the carrier would be if it were transmitted to get perfect demodulation. Since most receivers have a minimum tuning step it might not be possible, resulting in some distortion. In most cases this is not much of an issue, but with music e.g. it can make a difference. Also, in SSB if the frequency is drifting you need to constantly retune.
Is the reason that all SW radios cannot allow us to hear SSB signals solely because most radios lack the capability to move in 1 kHz tuning increments, or is there more involved than just that, Gilles? If that is all, one would think every vintage SW radio with linear tuning would get SSB when tuned finely. Thank you.
In AM the carrier itself is being used to demodulate the signal. In SSB the carrier is not present, so the receiver must produce its own "carrier" via a beat frequency oscillator. This makes SSB receiver more complicated and expensive.
@@scottcranston7469where do I learn what all of what you said means? I don’t understand any of it. I was installing radios and antennas at work for our power company and I thought that I needed to learn about them but I retired. We did a large variety of things so we had occasional gaps in our knowledge. The variety was nice though but sometimes we got spread too thin with all of the new technology we were working with. Thanks
I didn’t understand what he was talking about. I was shopping for a new radio that has SSB and I wanted to see what it was. I don’t understand it but it must be ok.
👍📻
Is FM modulation ever used with shortwave? If not, why?
Thanks,
Jack
only on the 10 meter amateur radio band, it is not used because it takes too much space on the spectrum and would have reduced the number of stations that can be on a given frequency range
@@OfficialSWLchannel Yes, that makes sense. Thanks for the reply.
Jack