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GMRS / FRS - Discussions related to GMRS (General Mobile Radio Service) and FRS (Family Radio Service) communications

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  #1 (permalink)  
Old 01-25-2018, 10:24 AM
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Default NXDN on 462.5625

Has NXDN been authorized on GMRS/FRS?
Here in Joplin MO, a new user has popped up with NXDN on 462.5625.
No Talkgroup displayed, RAN 63, about 50 RIDs.
Ho makes such (apparently illegal?) radios.
Thanks
W
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Old 01-25-2018, 10:30 AM
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Quote:
Originally Posted by wbloss View Post
Has NXDN been authorized on GMRS/FRS?
No. No digital voice modes are allowed on GMRS or FRS.

They are probably just using regular commercial radios.
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Old 01-25-2018, 10:33 AM
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Default NXDN on 462.5625

No the FCC hasnít changed the rules since September and then they only allowed digital for short data transmissions only on FRS. Iíd urge you to reference the rules here by clicking this link so you can see for you self. Donít take anyoneís word.

https://www.federalregister.gov/docu...service-reform


However, back to hearing the NXDN on FRS Ch 1. Youíre going to hear digital modes, scramblers, and other things on the FRS / GMRS frequencies that are not technically allowed by the FCC. Thatís just the way it is and itís harmless.


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Old 01-25-2018, 12:29 PM
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Originally Posted by wbloss View Post

Ho makes such (apparently illegal?) radios.

Thanks

W

Kenwood and Icom.



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Old 01-25-2018, 12:30 PM
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Kenwood and Icom. Not Ďillegalí just a digital voice type being used in a service it is not authorized to be used on.


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Old 01-25-2018, 12:43 PM
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Alinco makes a small UHF NXDN (non-trunking radio) also.

The issue isn't the radio, it's the son of a monkey's uncle that programmed them.
End users with little/no experience in radio will often "Google" it and figure they know how to set up a server, therefore they are qualified to be a radio tech.
Or, certain nationwide radio service providers have been known to dump users on FRS and GMRS frequencies to make a quick buck.

Not surprising, not uncommon, not legal.

Remember, most think one or more of the following:
-It is only illegal if you get caught.
-The rules don't apply to me.
-Some stranger on the internet said it was OK.
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Old 01-25-2018, 1:08 PM
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Quote:
Originally Posted by wbloss View Post
Has NXDN been authorized on GMRS/FRS?
Here in Joplin MO, a new user has popped up with NXDN on 462.5625.
No Talkgroup displayed, RAN 63, about 50 RIDs.
Ho makes such (apparently illegal?) radios.
Thanks
W
Is what you're hearing 12.5k NXDN or 6.25k NXDN?

If it's 12.5k NXDN (9600 baud), the equipment is most likely Kenwood NEXEDGE.
If it's 6.25k NXDN (4800 baud), equipment is most likely Icom iDAS or Kenwood NEXEDGE.

Kenwood NEXEDGE supports 12.5k and 6.25k NXDN. Icom iDAS is 6.25k NXDN only.

I have used Kenwood NEXEDGE and Icom iDAS radios together on 6.25k NXDN. I recently sold my Kenwood NX-300 UHF NEXEDGE handhelds I've owned since NEXEDGE first hit the market around 2009. I've moved on to DMR and other digital modes including P25 (Phase 1) and 900MHz DTR/DLR radios. The NX-300 is a good radio and great for GMRS in analog mode because it specifically has Part 95 Type Acceptance in addition to Part 90 on it. The NX-300 is squeaky clean and legal as GMRS equipment in analog mode (only).
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Last edited by n1das; 01-25-2018 at 1:12 PM..
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Old 01-25-2018, 1:46 PM
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Kenwood and Icom. Not ‘illegal’ just a digital voice type being used in a service it is not authorized to be used on.
Which exactly fits the definition of "illegal."
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Old 01-25-2018, 1:52 PM
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Quote:
Originally Posted by n1das View Post
Is what you're hearing 12.5k NXDN or 6.25k NXDN?

If it's 12.5k NXDN (9600 baud), the equipment is most likely Kenwood NEXEDGE.
If it's 6.25k NXDN (4800 baud), equipment is most likely Icom iDAS or Kenwood NEXEDGE.

Kenwood NEXEDGE supports 12.5k and 6.25k NXDN. Icom iDAS is 6.25k NXDN only.

I have used Kenwood NEXEDGE and Icom iDAS radios together on 6.25k NXDN. I recently sold my Kenwood NX-300 UHF NEXEDGE handhelds I've owned since NEXEDGE first hit the market around 2009. I've moved on to DMR and other digital modes including P25 (Phase 1) and 900MHz DTR/DLR radios. The NX-300 is a good radio and great for GMRS in analog mode because it specifically has Part 95 Type Acceptance in addition to Part 90 on it. The NX-300 is squeaky clean and legal as GMRS equipment in analog mode (only).


Iím moving towards P25. I donít like DMRís audio quality. Iíve heard a few NXDN radios in action and their audio sounds similar to P25 in my opinion.


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WQPN413
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Old 01-28-2018, 4:47 PM
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Quote:
Originally Posted by dawsonpadams View Post
Iím moving towards P25. I donít like DMRís audio quality. Iíve heard a few NXDN radios in action and their audio sounds similar to P25 in my opinion.


-Dawson Adams
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P25 and DMR use the same AMBE2 vocoder with the same sampling rate and error correction. How can P25 sound better the DMR ? Only way possible is you're using a Motorola TRBO radio with really old firmware or perhaps a cheap Chinese DMR radio. After Motorola fixed the firmware on gen one and two radios the audio problems were gone.

I honestly cannot tell the difference between DMR and P25 sitting right next to each other.
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Old 02-08-2018, 3:07 PM
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Quote:
Originally Posted by Skypilot007 View Post
P25 and DMR use the same AMBE2 vocoder with the same sampling rate and error correction. How can P25 sound better the DMR ?
I will say that I have a XPR3500e and a CP200D, both have the same settings, nothing different that would make the audio sound better.

When receiving on the CP200D it sounds amazing, has a lot more bass to it and the quality is completely noticeable. The XPR3500e when receiving however is comparable to a cheap Chinese DMR radio, honestly. It doesn't have as much bass as the CP200D, so it sounds different to me.

If I compared my XTS3000 P25 to the XPR3500e and picked which one sounded better I would pick the 3000 over the 3500, despite the many features DMR has over P25 in conventional mode.

I could see it if he's comparing it to a cheap Chinese radio like you said or even in my case.
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Old 02-08-2018, 8:29 PM
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Quote:
Originally Posted by wbloss View Post
Has NXDN been authorized on GMRS/FRS?
Here in Joplin MO, a new user has popped up with NXDN on 462.5625.
No Talkgroup displayed, RAN 63, about 50 RIDs.
Ho makes such (apparently illegal?) radios.
Thanks
W
W, any update on who it might be in your area? Repeater or simplex?
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