Narrow FM/Wide FM Question

[nokones]

If there is a mix of narrowband and wideband users on the same channel trying to communicate with each other they most definitely won't play very well together and have a difference in modulation levels.

 

[RFI-EMI-GUY]

Nokones: "What was that hit?"

The impact is well documented in EIA/TIA603D. The article below shows both the degradation in decibels as well as the significant statistical impact on area map coverage resulting from the degradation.

LEIKHIM AND ASSOCIATES LLC - VHF-UHF Narrowbanding

 

[prcguy]

What was that hit? Can you still understand the audio with clarity, yes you can, and that means the communication objective was accomplished? Is the difference in the audio sound a distraction in understanding the audio being transmitted, no its not, and that means the communication objective was still accomplished. Do you think the Public Safety system users, the biggest complainers of all complainers had complaints when they were mandated to go narrowband 10+ years ago, not even a peep from the users. Just because it sounds different doesn't mean its not useable and the benefit of narrowbanding and making additional channels available in a closer proximity still outweighs the difference of it sounding different even if you can tell the difference. Narrowbanding makes sense as the airwaves become more crowded with users.

I'm sure it may sound different to some people but is that really a problem in communicating, No it is not. After a short while you'll get use to it and won't even remember the difference.

If you think the quality of sound is a real problem in understanding the audio and if that really bothers you, you might as well hang up your radio before you are mandated to go digital such as P25. Yes. P25 digital does sound different so what. If you're looking for stereophonic quality sound then get some earbuds and listen to music because you definitely will not like the quality of digital audio.

And, if you're communicating on a simulcast system, OMG, you better standby because the audio will sound like hell especially on a digital system. If that is going to be a problem for you, well what can I tell you, you might want to resort to texting rather than playing with radios.

You don't know me or what I did for a living, so I’ll let you slide a little. However in some fairly recent testing I’ve done using a Quantar in amateur service and changing the transmit BW from 5KHz dev to 4KHz dev to 2.5KHz dev, all users noticed the progressive changes and didn’t like the loss in audio fidelity. If you’re not under some mandate to run narrowband (like amateur or GMRS) then why not enjoy better audio quality and coverage?

 

[RFI-EMI-GUY]

I made w

Nokones: "What was that hit?"

The impact is well documented in EIA/TIA603D. The article below shows both the degradation in decibels as well as the significant statistical impact on area map coverage resulting from the degradation.

LEIKHIM AND ASSOCIATES LLC - VHF-UHF Narrowbanding

I should have had my coffevee. I made wrong reference to a TIA spec. It should be: TSB-88B Table 1-A, Table 2

 

[belvdr]

I made w

I should have had my coffevee. I made wrong reference to a TIA spec. It should be: TSB-88B Table 1-A, Table 2

Maybe have another cup. lol

 

[RFI-EMI-GUY]

You don't know me or what I did for a living, so I’ll let you slide a little. However in some fairly recent testing I’ve done using a Quantar in amateur service and changing the transmit BW from 5KHz dev to 4KHz dev to 2.5KHz dev, all users noticed the progressive changes and didn’t like the loss in audio fidelity. If you’re not under some mandate to run narrowband (like amateur or GMRS) then why not enjoy better audio quality and coverage?

So very true. GMRS is a high performance (wide band, 50 watts) communications option for families. There is nothing that comes close in cost or performance. Why wreck it?

 

[nokones]

You don't know me or what I did for a living, so I’ll let you slide a little. However in some fairly recent testing I’ve done using a Quantar in amateur service and changing the transmit BW from 5KHz dev to 4KHz dev to 2.5KHz dev, all users noticed the progressive changes and didn’t like the loss in audio fidelity. If you’re not under some mandate to run narrowband (like amateur or GMRS) then why not enjoy better audio quality and coverage?

Are you one of those geniuses that is against a radio system with a simulcast design and want a system warble and wa-wa free with stereo phonic quality audio and hum free from PL and DPL? Just curious. Most people like you are like that.

 

[RFI-EMI-GUY]

Are you one of those geniuses that is against a radio system with a simulcast design and want a system warble and wa-wa free with stereo phonic quality audio and hum free from PL and DPL? Just curious. Most people like you are like that.

watch yourself, newbie

 

[nokones]

watch yourself, newbie

Thought so.

 

[mikewazowski]

OP's question was answered a long time ago. No sense for this to continue.