OT: Digital Trunked Radio: Audio quality

Mike ODELL mo at ccr.org
Fri Sep 28 19:53:21 CDT 2012

I have never met anyone using trunked digital radio that did not
complain about the horrible audio quality and have the express longing
to the "good old days" of analog NFM. my brother is an emergency
coordinator and he HATES digital trunked radios and it's all he can do
to keep the first responders from commandeering the 2m HTs in the EOC.


Sent from my iPad so please excuse the jammy fingers.

On Sep 28, 2012, at 2:46 PM, Iain McFadyen <ki4hlv at gmail.com> wrote:

> I wanted to ask everyone's opinion regarding the audio quality of the digital trunked radio networks in use by the public service departments.
> I consider myself to be pretty good at picking information out of a pile-up, or noisy radio conditions, but when I am listening to some of these digital channels, I have extreme difficulty picking up the information. 
> Wondering whether our public service staff are suffering the same thing or whether perhaps;...
> (i) the type of receiver being used to transfer the audio to the internet is not faithfully decoding the digital audio?
> (ii) the receiver is badly located, and I am hearing what is essentially 'packet loss' across the RF interface?
> (iii) the IP path from the radio to my PC is congested. (i.e. the degradation is related to the Internet portion, not the radio segment)?
> To experience this, go to the following link, select by clicking once in the left hand box, on either Fairfax Fire & Rescue, or Fairfax Police.
> http://www.radioreference.com/apps/audio/?action=cwp&ctid=2848
> My experiences are that Fairfax Fire dispatch is crisp and clear but units responding are garbled.
> Farifax Police is garbled and units responding are also garbled.
> If they are on the same trunked network, how could FFX Police be garbled and yet FFX Fire is perfect?
> Iain   KI4HLV
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