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roadrage

roadrage

Active Member
Aug 3, 2011
495
108
38
In the middle of nowhere. Central/northern Maine
I don't need any arrogance or snotty opinions by asking this question. I am in the learning phase and want to work toward getting my ticket. If I knew everything, then I wouldn't need to join forums unless I wanted to show my dominance and supperior intelect and make other people feel stupid. Fact of the matter is that I am an ex-infantryman. I was a paratrooper for 4 years and have over 6 years of service to my country. I have spent 2 of those years risking my life over 2 combat tours. I have come home to sleepless nights and constant counseling and anger management. I really don't need the stress and anger as a result of anyone trying to make themself feel smart by making me feel stupid, please.

Now that I've cleared that up, though I garrantee it will take about 5 posts before I get that guy who will do it anyway, There is AM, FM WB, FM NB, and SSB. They can be set to the same frequency. I know that AM is amplitude modulation, FM is frequency modulation, wide band, narrow band, single side band. That doesn't really explain what makes them different. If I was on 155.121 AM and someone was on 155.121 FM, I imagine I would hear them all garbled and unreadable, but why. I tried to understand the difference of SSB and AM but I don't really get it. Sometimes if I don't understand something I need to see it to understand it, but that isn't an option here.
 
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i can not answer your question, sorry. but i will thank you for your service to this country. also i wish you luck with your anger issuses.

buy the way i am post number 4 sooooooo, the next on should be the answer your looking for.:thumbup:
 
roadrage said:
I don't need any arrogance or snotty opinions by asking this question. I am in the learning phase and want to work toward getting my ticket. If I knew everything, then I wouldn't need to join forums unless I wanted to show my dominance and supperior intelect and make other people feel stupid. Fact of the matter is that I am an ex-infantryman. I was a paratrooper for 4 years and have over 6 years of service to my country. I have spent 2 of those years risking my life over 2 combat tours. I have come home to sleepless nights and constant counseling and anger management. I really don't need the stress and anger as a result of anyone trying to make themself feel smart by making me feel stupid, please.

Now that I've cleared that up, though I garrantee it will take about 5 posts before I get that guy who will do it anyway, There is AM, FM WB, FM NB, and SSB. They can be set to the same frequency. I know that AM is amplitude modulation, FM is frequency modulation, wide band, narrow band, single side band. That doesn't really explain what makes them different. If I was on 155.121 AM and someone was on 155.121 FM, I imagine I would hear them all garbled and unreadable, but why. I tried to understand the difference of SSB and AM but I don't really get it. Sometimes if I don't understand something I need to see it to understand it, but that isn't an option here.
Click to expand...


Glad to see someone can make a request with attitude while expecting to not receive the same in return.

Basically with each mode the information is superimposed onto the RF carrier in a unique manner and as such each mode requires a unique manner in which to retrieve that information on the receive end. AM varies the amplitude of the carrier while FM varies the frequency of the carrier. SSB has no carrier and the receiver must reinsert a carrier to recover the audio from. NBFW has a much wider bandwidth as it deviates from the center carrier frequency much further than it does on NBFM. Either NB or WB can be decoded on a regular FM receiver however with a NB FM rx a WB signal will be very loud and distorted while if the other way around a NB signal will be very low volume while listening to it on a WBFM receiver.That's it in a nutshell.
 
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I thought your opening remarks were out of line. Obviously, your username reflects your attitude.

I am also a combat veteran, but I don't air horseshit like that in a public forum.
 
roadrage said:
I don't need any arrogance or snotty opinions by asking this question. I am in the learning phase and want to work toward getting my ticket. If I knew everything, then I wouldn't need to join forums unless I wanted to show my dominance and supperior intelect and make other people feel stupid. Fact of the matter is that I am an ex-infantryman. I was a paratrooper for 4 years and have over 6 years of service to my country. I have spent 2 of those years risking my life over 2 combat tours. I have come home to sleepless nights and constant counseling and anger management. I really don't need the stress and anger as a result of anyone trying to make themself feel smart by making me feel stupid, please.

Now that I've cleared that up, though I garrantee it will take about 5 posts before I get that guy who will do it anyway, There is AM, FM WB, FM NB, and SSB. They can be set to the same frequency. I know that AM is amplitude modulation, FM is frequency modulation, wide band, narrow band, single side band. That doesn't really explain what makes them different. If I was on 155.121 AM and someone was on 155.121 FM, I imagine I would hear them all garbled and unreadable, but why. I tried to understand the difference of SSB and AM but I don't really get it. Sometimes if I don't understand something I need to see it to understand it, but that isn't an option here.
Click to expand...

This is a really Good question. Thank you for asking. i see there is a few replys.
 
Captain Kilowatt said:
Glad to see someone can make a request with attitude while expecting to not receive the same in return.

Basically with each mode the information is superimposed onto the RF carrier in a unique manner and as such each mode requires a unique manner in which to retrieve that information on the receive end. AM varies the amplitude of the carrier while FM varies the frequency of the carrier. SSB has no carrier and the receiver must reinsert a carrier to recover the audio from. NBFW has a much wider bandwidth as it deviates from the center carrier frequency much further than it does on NBFM. Either NB or WB can be decoded on a regular FM receiver however with a NB FM rx a WB signal will be very loud and distorted while if the other way around a NB signal will be very low volume while listening to it on a WBFM receiver.That's it in a nutshell.
Click to expand...

That was actually very helpful. One thing I don't understand is the frequency modulation. How much of the frequency is varied? What I mean is, if I was set at 144.000 would the variation be a noticable amount or very minimal?

I am also going to follow those links that someone posted and check them out.
 
To clear up my apparent rudeness, It isn't an intentional implication. I think differently than most people because I seldom open my mouth without offending everyone listening. I re-read it and I can see how it sounds very rude and confrontational.
Being that people's brains don't work like mine, I will translate my opening statement in short: I am stressed out, this is why I'm stressed out, please don't cause me further stress by making me feel stupid.

Sorry if I offended anyone.
 
roadrage said:
That was actually very helpful. One thing I don't understand is the frequency modulation. How much of the frequency is varied? What I mean is, if I was set at 144.000 would the variation be a noticable amount or very minimal?

I am also going to follow those links that someone posted and check them out.
Click to expand...

It depends. What we call nbfm on 2m is plus/minus 2.5khz from catrier frequency. Normal or wbfm is plus/minus 5khz. However on fm broadcasting which is true wbfm the carrier is varied plus/minus. 75 khz from the carrier frequency. The variation in freq is called deviation
 
Dont mean to hijack. But what is narrow fm ? I found out listening to repeaters and fire department on narrow fm is louder and cleaner. But transmitting on nfm doesnt sound so good on the recieveing end...
 
DOnt think it was mentioned yet, but the OP was asking about, is the band plans. Certain sections of each band are assigned for use with different modes. There are sections allocated to ssb, am, fm, as well as for data on 2m for example. 146.520, the simplex calling frequency on 2m, is allocated in the fm portion, hence you use fm for that part of the band.
 
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