It is currently Sun May 20, 2018 9:41 pm

Click the link below to visit the site sponsor

The Ham Radio Shop




Post new topic Reply to topic  [ 27 posts ]  Go to page Previous  1, 2
 Dstar communication 
Novice Member

Joined: Mon Apr 27, 2015 8:36 pm
Posts: 49
Location: Northampton IO92ng
Feedback: 6 (100%)
Reply with quote
Post Re: Dstar communication
I too shall be delving into the world of Dstar with a NW Radio dongle currently on its way.
However, HF SSB is and always will be my preferred method.


Sat Jan 09, 2016 10:06 pm
Profile Send private message

 Dstar communication 
Novice Member

Joined: Fri Mar 28, 2014 1:35 pm
Posts: 34
Location: Oldham
Feedback: 0 (0%)
Reply with quote
Post Re: Dstar communication
My experience with DStar.

To be honest, it is little different than Echolink/IRLP/Allstar, like it or lump it. I need not explain the benefits of the other VOIP's. They all have some merit. Save that DStar provides some assurance from the 21'st Century problem of abusers and those who prefer to spoil our hobby.

The fact is that many of the inner city repeaters are frequently subject to abuse. Paradoxically, DStar is in a way, reminiscent of how it used to be before the idiots who became tired of smashing windows in bus shelters and got their kicks instead causing problems to many users on a repeater, with their cheap imported radio in many cases.

In particular, Ian, G4ZPZ invested a fortune in GB3PZ. I spent countless hours on technically getting PZ up and running. The vulnerability of analogue repeaters are such that in this case it only took one elderly licenced ham with a mental health problem and one permanently drunken unlicensed station to cause the PZ user base to abandon PZ in droves.

Finally, those who churn out the same one sentence criticism of DStar without elaboration do not deserve a reply, similar to those who moaned about SSB v CW years ago. To those who are concerned about DMR or DStar, I ask if you are aware that in many cases in the UK it is possible to talk with both modes through the 'Bridge' kindly provided by Dave M0AUT? This provides an amicable marriage of DMR and DStar users. As you may imagine, it is popular among UK users.

And no, I don't accept that the equipment is too expensive. Take a look at thow much we had to pay in the 1970's for commercial kit or use converted taxi radios (Happy Days) Well in excess of the cost of DMR/DStar kit now.

Try it. You may just like it.

73
Graham
G4HFG / W4HFG


Tue Jan 26, 2016 1:00 pm
Profile Send private message

 Dstar communication 
Contributor 2017
User avatar

Joined: Sat Jan 23, 2016 7:24 am
Posts: 1312
Location: Blackpool. IO83lu
Feedback: 4 (100%)
Reply with quote
Post Re: Dstar communication
OK.. finally jumped onto the D Star wagon. Not intentionally I might add... I just bought a ID5100 because I wanted a dual band, dual watch radio with a fast scanner... and the price was right.

Well... One thing is immediately obvious to me.. no one seems to be using it as a radio mode in my area. I can leave the radio scanning set to DV for days and it will not stop once. Everyone is using the internet it would seem, which isn't radio and is pointless.

I've done some tests with local stations just to see if it works, and my god.... the sound quality is terrible.


Either I'm doing something incredibly wrong, or you lot are easily pleased.

_________________
https://www.qrz.com/db/G0SLV


Tue May 02, 2017 7:11 am
Profile Send private message

 Dstar communication 
Contributor 2017
User avatar

Joined: Sat Jun 18, 2011 4:15 pm
Posts: 13733
Location: io65ga, Donegal
Feedback: 8 (100%)
Reply with quote
Post Re: Dstar communication
G0SLV wrote:
OK.. finally jumped onto the D Star wagon. Not intentionally I might add... I just bought a ID5100 because I wanted a dual band, dual watch radio with a fast scanner... and the price was right.

Well... One thing is immediately obvious to me.. no one seems to be using it as a radio mode in my area. I can leave the radio scanning set to DV for days and it will not stop once. Everyone is using the internet it would seem, which isn't radio and is pointless.

I've done some tests with local stations just to see if it works, and my god.... the sound quality is terrible.


Either I'm doing something incredibly wrong, or you lot are easily pleased.


LOL, best prepare for a shitstorm :shock: :D

_________________
Even duct tape can't fix stupid, but it can muffle the sound.


Tue May 02, 2017 7:38 am
Profile Send private message

 Dstar communication 
Contributor 2017
User avatar

Joined: Sat Jan 23, 2016 7:24 am
Posts: 1312
Location: Blackpool. IO83lu
Feedback: 4 (100%)
Reply with quote
Post Re: Dstar communication
ei9ju wrote:
G0SLV wrote:
OK.. finally jumped onto the D Star wagon. Not intentionally I might add... I just bought a ID5100 because I wanted a dual band, dual watch radio with a fast scanner... and the price was right.

Well... One thing is immediately obvious to me.. no one seems to be using it as a radio mode in my area. I can leave the radio scanning set to DV for days and it will not stop once. Everyone is using the internet it would seem, which isn't radio and is pointless.

I've done some tests with local stations just to see if it works, and my god.... the sound quality is terrible.


Either I'm doing something incredibly wrong, or you lot are easily pleased.


LOL, best prepare for a shitstorm :shock: :D


Bring it on.

If no one's using it as a radio mode, then it's a load of useless bollocks.

_________________
https://www.qrz.com/db/G0SLV


Tue May 02, 2017 8:20 am
Profile Send private message

 Dstar communication 
Moderator

Joined: Fri Jul 20, 2007 1:02 pm
Posts: 14000
Location: IO83lb, Wrexham
Feedback: 16 (100%)
Reply with quote
Post Re: Dstar communication
G0SLV wrote:
ei9ju wrote:
G0SLV wrote:
OK.. finally jumped onto the D Star wagon. Not intentionally I might add... I just bought a ID5100 because I wanted a dual band, dual watch radio with a fast scanner... and the price was right.

Well... One thing is immediately obvious to me.. no one seems to be using it as a radio mode in my area. I can leave the radio scanning set to DV for days and it will not stop once. Everyone is using the internet it would seem, which isn't radio and is pointless.

I've done some tests with local stations just to see if it works, and my god.... the sound quality is terrible.


Either I'm doing something incredibly wrong, or you lot are easily pleased.


LOL, best prepare for a shitstorm :shock: :D


Bring it on.

If no one's using it as a radio mode, then it's a load of useless bollocks.

It's the same here.
I checked around, on receive, when I first had the 7100.
It seemed to be all internet linked, not even straight repeater, and terrible audio, even on strong signals.
I've never bothered to TX.

You're not far from me so direct shouldn't be a problem, if you have a Yagi.
We can give it a try if you want.
I'd be interested in doing some more fade margin checks, with a known signal rather than an unknown quantity.
My initial ones seened to indicated FM was more resilient but, since others seem to disagree, I'd like to do further checks.

Cheers

Tony

_________________
50MHz and above from IO83lb


Tue May 02, 2017 9:53 am
Profile Send private message

 Dstar communication 
Contributor 2017
User avatar

Joined: Sat Jan 23, 2016 7:24 am
Posts: 1312
Location: Blackpool. IO83lu
Feedback: 4 (100%)
Reply with quote
Post Re: Dstar communication
gw8asd wrote:
It's the same here.
I checked around, on receive, when I first had the 7100.
It seemed to be all internet linked, not even straight repeater, and terrible audio, even on strong signals.
I've never bothered to TX.

You're not far from me so direct shouldn't be a problem, if you have a Yagi.
We can give it a try if you want.
I'd be interested in doing some more fade margin checks, with a known signal rather than an unknown quantity.
My initial ones seened to indicated FM was more resilient but, since others seem to disagree, I'd like to do further checks.

Cheers

Tony




No beams up at the mo. Nearly bought another one last week, but our local club has a project coming up, so I'll support that, and build one. Tbh... most of my energy is being put into sourcing parts and designing a symmetrical matching unit at the moment, so I can get a decent HF antenna up... but the thought of a lightweight beam and a FT857... and some exercise is starting to look appealing :)

I must confess I'm disappointed in D-Star... not just the audio, which I'll get into in a moment, but the lack of use as a mode of operation radio to radio. I knew D Star's party trick was connectivity, but I always assumed it was an extra... another feather in it's cap, not its raison d'être! Why would anyone buy a RADIO, then just use it to connect to the internet? Sorry, but baffled by this. I know this is a D Star forum... so it's just an irrelevant comment bound to result in "If you don't like it, sod off" and fair enough... I get that, but why's no one using it via the RADIO??

Now then... audio. I'm sorry... it just sucks, plain and simple. It makes everyone sounds like an underwater robot. It just does. It's not even CLOSE to the quality the same people can produce using FM. To market it as "Crystal clear" audio is bordering on a trade descriptions infringement. I just reckon some people are just suffering from confirmation bias, or they're deaf!

_________________
https://www.qrz.com/db/G0SLV


Tue May 02, 2017 10:03 am
Profile Send private message

 Dstar communication 
Moderator

Joined: Fri Jul 20, 2007 1:02 pm
Posts: 14000
Location: IO83lb, Wrexham
Feedback: 16 (100%)
Reply with quote
Post Re: Dstar communication
G0SLV wrote:
gw8asd wrote:
It's the same here.
I checked around, on receive, when I first had the 7100.
It seemed to be all internet linked, not even straight repeater, and terrible audio, even on strong signals.
I've never bothered to TX.

You're not far from me so direct shouldn't be a problem, if you have a Yagi.
We can give it a try if you want.
I'd be interested in doing some more fade margin checks, with a known signal rather than an unknown quantity.
My initial ones seened to indicated FM was more resilient but, since others seem to disagree, I'd like to do further checks.

Cheers

Tony


No beams up at the mo. Nearly bought another one last week, but our local club has a project coming up, so I'll support that, and build one. Tbh... most of my energy is being put into sourcing parts and designing a symmetrical matching unit at the moment, so I can get a decent HF antenna up... but the thought of a lightweight beam and a FT857... and some exercise is starting to look appealing :)

I must confess I'm disappointed in D-Star... not just the audio, which I'll get into in a moment, but the lack of use as a mode of operation radio to radio. I knew D Star's party trick was connectivity, but I always assumed it was an extra... another feather in it's cap, not its raison d'être! Why would anyone buy a RADIO, then just use it to connect to the internet? Sorry, but baffled by this. I know this is a D Star forum... so it's just an irrelevant comment bound to result in "If you don't like it, sod off" and fair enough... I get that, but why's no one using it via the RADIO??

Now then... audio. I'm sorry... it just sucks, plain and simple. It makes everyone sounds like an underwater robot. It just does. It's not even CLOSE to the quality the same people can produce using FM. To market it as "Crystal clear" audio is bordering on a trade descriptions infringement. I just reckon some people are just suffering from confirmation bias, or they're deaf!

I can't see that it does nothing that couldn't be done with FM.
All the functions could be done with out of band data streams.

Still, each to their own.

Cheers

Tony

_________________
50MHz and above from IO83lb


Tue May 02, 2017 10:42 am
Profile Send private message

 Dstar communication 
Contributor 2017

Joined: Wed Nov 28, 2012 2:43 pm
Posts: 5169
Location: Cumbria IO94iv
Feedback: 25 (100%)
Reply with quote
Post Re: Dstar communication
Only benefit "radio" wise with DV that I have found it to offer me is that of a cleaner audio when working weaker stations, whereas the background noise of the FM transmission would reduce the signal received. Other than that it has no real benefit for us being a digital communication mode.

_________________
John G Ritson CMH


Tue May 02, 2017 11:13 am
Profile Send private message WWW

 Dstar communication 
Contributor 2017

Joined: Mon Dec 22, 2014 8:40 pm
Posts: 444
Location: Wolverhampton, West Midlands
Feedback: 1 (100%)
Reply with quote
Post Re: Dstar communication
The audio quality of DV modes may be viewed differently by different generations.

If you've been brought up in the mobile phone era, you're used to a permanently silent background and the audio quality degrading as signals fade, or there is multi-path.

Those (like myself) who spent their formative years on analogue are used to the noise coming up as the signal fades, but the audio quality degrading. My other half can't make head nor tail of SSB, yet it sounds perfectly fine to me. Maybe that is down to over 40 years of listening to it.

I got into DMR because I thought it was high time I tried something totally new, and I had plenty of locals who were experienced with it. At the outset I really struggled to tolerate the audio, but I seem to be getting more tolerant of it lately. Maybe my tired old brain is becoming used to the 'mobile phone' type of fading effects.

One thing is for sure though (well two actually). Firstly, some peoples voices seem far more suited to the DMR codec than others. I only use DMR to talk to the locals. Some of them sound quite natural, while others sound 'different'. The Motorola 4600 I have allows you to adjust the audio profile on receive. Different people sound better on different settings, but its such a pain using the panel buttons to switch AF profiles I've given up bothering. Its a pity you can't link AF profiles to people in the rig's database list.

Secondly, while some rigs seem to sound better than others, every single person I've spoken to using one of those local 'hotspot' gadgets sounded awful. It hasn't been many so maybe I've been unlucky.


Sat May 05, 2018 9:18 am
Profile Send private message

 Dstar communication 
Contributor 2018
User avatar

Joined: Wed Aug 14, 2013 8:29 pm
Posts: 6748
Location: Doncaster
Feedback: 17 (100%)
Reply with quote
Post Re: Dstar communication
Well it's not pointless bollocks and if it is why have so many radios been sold with the option of dstar or fusion? It is not for everyone and I agree some audio is terrible but I generally find most conversations satisfactory.
Tell you what it beats listening the white noise on vhf and uhf :)
I see it as a nice little add on to the rest of my radio tinkering, horses for courses I guess.

_________________
Mark M0VMT
10 Watts he said....super bazooka


Sat May 05, 2018 3:45 pm
Profile Send private message

 Dstar communication 
Advanced Member

Joined: Fri Dec 02, 2011 8:42 am
Posts: 203
Location: Newry, Northern Ireland IO64UE
Feedback: 9 (100%)
Reply with quote
Post Re: Dstar communication
Wot Mark said ^^^


Wed May 09, 2018 7:17 am
Profile Send private message
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 27 posts ]  Go to page Previous  1, 2


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore.