CB Radio Talk

WavMixer · #31426

I know what AM and SSB are, but what is FM? I'm in the market for a radio w/SSB and I noticed that some AM radios also have SSB or FM but not both. Why not FM with SSB?

BigBopper · #31427

some do like the Galaxy 99

Phaze91460 · #31448

Several of my radios have AM, FM, USB, LSB, and one has CW

FM ( frequency Modulation ) is just another mode for radio waves to travel.

Rex_foxhound · #31474

I never have heard anybody on FM.

WavMixer · #31499

Rex_foxhound wrote:I never have heard anybody on FM.

That's the answer I was lookin for :Peace!:

Rex_foxhound · #31507

Glad I could help. LOL

WavMixer · #31524

I know how SSB sonds on AM and how AM sounds on SSB... But how does FM deal with SSB and AM signals on the same frequency and vice versa?

Phaze91460 · #31536

You can get a more technical version in the help section but AM is a carrier wave with 2 modulation waves mirroring each other. SSB is only one of the modulation waves, either upper wave or lower wave. Upper Side Band = USB or Lower Side Band = LSB. SSB is only on AM.

WavMixer · #31625

I know what AM, FM, USB, LSB & CW mean as well as their principle. I know if I am on AM listening to SSB, it sounds like Donald Duck. I know if I listen I'm on SSB listening to AM, there is a high pitch squeel. I was just curious as what to expect from FM when listening to AM? Basically, i know how to differentiat AM and SSB, but how will I know if it's FM someone else is broadcasting on? Will I hear them or be able to understand them? I would imagine that FM would be cleaner signal than AM just as it is in the commercial broadcast AM/FM signals. Maybe I should shut up and wait till my radio gets here.

Phaze91460 · #31635

WavMixer wrote:I know what AM, FM, USB, LSB & CW mean as well as their principle. I know if I am on AM listening to SSB, it sounds like Donald Duck. I know if I listen I'm on SSB listening to AM, there is a high pitch squeel. I was just curious as what to expect from FM when listening to AM? Basically, i know how to differentiat AM and SSB, but how will I know if it's FM someone else is broadcasting on? Will I hear them or be able to understand them? I would imagine that FM would be cleaner signal than AM just as it is in the commercial broadcast AM/FM signals. Maybe I should shut up and wait till my radio gets here.

I've got to say that I think you are confused. If you are on AM you are on AM. You cant listen on SSB if you are on AM. If you are on SSB you are on SSB which is either the upper AM wave or the lower AM wave. Technicaly you are listening to half of the AM wave but you are not listening to AM. FM has no SSB so if you are on FM you are listening to FM. You cant listen to any FM while on SSB.

You will know if its FM someone is broadcasting on because you have to be on FM and on that particular channel for you to hear them. If you were on FM mode band "A" and channel "1" and you heard someone then they would also be on FM mode band "A" and channel "1"

You are not going to hear someone on any other channels, modes or bands unless you are on the same as them.

Example: You have to be on your favorite FM radio station channel to hear the music you like but you cant hear the AM talk radio station when you are tuned into FM.

Frequencies are spicific pathways that you operate in. The ONLY time someone will bleed over into another freq is if they are driving some major power and you are close enough to have it bleed over.

WavMixer · #31640

Not so much confused as maybe not explaining my question correctly.

For example, let's say I have my radio listening to 26.965 MHz (CH 1) in AM mode. If someone with another radio were to broadcast on the same frequency in LSB mode, I would be able to hear him although I wouldn't be able to understand him.

Example two, I now have my radio set to LSB on 26.965 MHz and someone on AM transmits also on 26.965 MHz. I would be able to hear him with a high pitched sequel created by his carrier.

Assuming that I was receiving on 26.965 MHz and switched to FM, and someone was transmitting also on 26.956 MHz in AM mode, what would I hear?

Rex_foxhound · #31662

I understand what your saying. I go to chn. 38 AM and I can somewhat hear people but I can't make out what they're saying which must mean that they are either USB or LSB on chn. 38.

As for FM, I don't know mainly because I've never heard anybody on FM, period. It would be interesting to find out the answer to that very intriguing question. Surely someone knows...