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FM RDS
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Paul Blundell
With my new Digitech AR-1780 having RDS, do most stations broadcast this or not? I am seeing it on a few commercial frequencies but nothing on the ABC or other smaller broadcasters.
-- Paul - Moderator UltralightDX |
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Peter Laws
On Mon, Jun 10, 2019 at 8:05 PM Paul Blundell <tanger32au@...> wrote:
Outside the USA, dunno. Inside the USA ... mostly. Is it configured correctly? Not so much in the market I'm in. PTY is often wrong. Clock time is often wrong or missing. Station automation software may or may not be sending the correct data to the encoder. It's sad, really. -- Peter Laws | N5UWY | plaws plaws net | Travel by Train! |
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keith beesley
I have several portables with FM RDS, and the factory radio in my 2003 Chevrolet Impala (which I believe was made by Sangean; it programs and behaves just like a Sangean portable) also has it. About half the FM stations in my area use it to display a running playlist of song title and artist name, the others offer little more than station callsign, frequency, and maybe a slogan (e.g. "more hit music!"). Keith B. Seattle WA USA
On Monday, June 10, 2019, 7:50:59 PM PDT, Peter Laws <plaws0@...> wrote:
On Mon, Jun 10, 2019 at 8:05 PM Paul Blundell <tanger32au@...> wrote: > > With my new Digitech AR-1780 having RDS, do most stations broadcast this or not? I am seeing it on a few commercial frequencies but nothing on the ABC or other smaller broadcasters. > Outside the USA, dunno. Inside the USA ... mostly. Is it configured correctly? Not so much in the market I'm in. PTY is often wrong. Clock time is often wrong or missing. Station automation software may or may not be sending the correct data to the encoder. It's sad, really. -- Peter Laws | N5UWY | plaws plaws net | Travel by Train! |
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Paul Blundell
Thanks for the information Peter. Here in Tasmania it seems to be a mixed bunch, I was hoping to use it to help ID some stations I can hear. On Tue, Jun 11, 2019 at 12:50 PM Peter Laws <plaws0@...> wrote: On Mon, Jun 10, 2019 at 8:05 PM Paul Blundell <tanger32au@...> wrote: -- Paul --
Paul - Moderator UltralightDX |
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Andy ZL3AG
Hi Paul,
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Most NZ FM stations use RDS, so you'll be set for them next FM DX season. I did a bandscan while on the Gold Coast earlier in the year, and looking at my notes, less than 50% of strong signals had RDS data. I'm not sure what chipset the AR-1780 uses, but the following are my commented posted elsewhere on the AR-1733: #### When I had a bunch of portables sitting on the car roof during an SpE opening the other day, I had an AR-1733 (si4736 chip) with me and it was easily outperformed by the Tecsun PL380 (si4734) and the KMart DAB12711. Which got me thinking - WHY it wasn't as good as the PL380 (as they use a very similar radio chip)? I pulled the AR-1733 apart and the reason it stinks on FM is that they've added Air Band reception as a completely separate radio system causing the RF path from telescopic whip to the FM input of the SiliconLabs chip to be convoluted. The si4736 is designed to be directly connected to an aerial - says so in the design brief. Adding air band has downgraded the FM Broadcast specs. Interestingly there is also a "weather band" chip there as well that isn't used - probably enabled by software in a USA "C Crane Skywave" version. I wonder if the AR1780 has a similar design? If so, the FM performance may not be as good as you would expect. #### Andy ZL3AG On 11/06/19 3:59 PM, Paul Blundell wrote:
Thanks for the information Peter. Here in Tasmania it seems to be a mixed bunch, I was hoping to use it to help ID some stations I can hear. |
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Paul Blundell
Thanks for that Andy. Once I get another AR-1733, I will be doing some side by side testing. Paul On Tue, Jun 11, 2019 at 2:24 PM Andy ZL3AG via Groups.Io <zl3ag=radioengineering.com@groups.io> wrote:
-- Paul --
Paul - Moderator UltralightDX |
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