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Thread: FM/DAB digital radio - THAT WORKS!!

  1. #511
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    Oct 2009
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    No prob Craigbrass.

    As long as the problem is know i will wait in excitement for the next release :-).

    Tested it in my car with a laptop and a small portable radio antenna harnest and its working perfect except for some spesial places where even fm has bad signal.

    I know laptops issent the best option, but is it a "grounding" problem with the card?
    When i connect the 12V charger i loose all signal on the DAB card. I take it out and its all good. There is actually no question in that sentence since i am 99% sure its the laptop.. Time to assemble my computer component instead of the test laptop..

    Thanks again Craig

  2. #512
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    Feb 2007
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    Macclesfield, UK
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    Quote Originally Posted by audunfr View Post
    No prob Craigbrass.

    I know laptops issent the best option, but is it a "grounding" problem with the card?
    When i connect the 12V charger i loose all signal on the DAB card. I take it out and its all good.
    The Laptop charger is producing a lot of what's called "common mode noise". This will certainly knock the reception from the radio module.

    Assuming you are using a 12V to (whatever is required for your laptop - usually 19V) converter/charger, you could try and ground the casing of the USB lead to chassis. But I suspect your problem will go away if you use a grounded, external aerial attached to your car.

    Andy
    Andy Whittaker
    Macclesfield, UK

  3. #513
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    Oct 2009
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    Thanks Andy.

    I will try to use the standard aerial in my Dodge ram if it can provide dab signal to the dab module. I also have sirius antenna on the roof, but i guess i cannot use that one.

    Anyhow, since i am adding a stationary machine i will not have that problem.
    While i wait i have to use a CD-rom battery and then i get 4-5 hours so thats good enough for the time being.

    Thanks

  4. #514
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    Jun 2007
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    Quote Originally Posted by craigbrass View Post
    I know I keep saying this but the update is SO nearly ready for both standalone and Centrafuse. We have about 5 people testing it at the moment that I am sending daily updates to. I want to get it perfect before the next build.

    http://www.craigbrass.net/radio.zip is the best bet for now - raw control program.
    I'm happy for your the people who are testing your plugin, for my part I was expecting for a working plugin since last may when I ordered the unit.
    So tomorrow is holiday time and I have to remove this unit and reinstall my old HQCTI if I want to have a chance to listen radio on the road.

    Manu.

  5. #515
    Newbie SpaceMonkey's Avatar
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    Jan 2004
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    Adelaide, South Australia, Australia
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    Programming API?

    Hey all, anyone know how to program these directly? I've coded my own frontend for my carpc in .NET and need to create a plugin for it so I can control this radio.

    I can see the standalone app has a RadioController.dll, but I'm not sure how to use it in my .NET code as it looks to be a C/C++ dll. I'm guessing (my C is a little rusty) I'd need its C/C++ header file to be able to do anything with it which I cant see anywhere.

    Other than this my only other option is to sniff the virtual COM port while the standalone app talks to it and see what data is sent/received. This will be rather painful tho, so if anyones got an API or something I could use it would save me having to do this.

    Cheers

  6. #516
    Low Bitrate
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    Jul 2007
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    Australia
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    Hey Craig do you plan to release a Windows 7 Media Centre plug in for this? I know here in Australia theres a whole community waiting for DAB+ for there media centres

  7. #517
    Constant Bitrate soyfish's Avatar
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    Hi All, a bit of initial feedback from my setup.

    I have previously hacked up the end of the coax coming from my antenna, so I attached a new motorola plug to it, and used a motorola to BNC and then BNC to SMB (I think) adapter.

    Then plugged into the laptop, and FM is great. DAB+ is only half transmit strength in Canberra, but the scan found 12 channels (all that there is at the moment I think) but it seemed to drop in and out a bit. I went for a drive and had the same experience. Then after I wiggled the motorola connection it seemed to get better, but it wasn't consistent.

    If anyone can confirm for me - the little teeth on cable the end of the motorola plug that clamp down when the end is screwed on, they are meant to clap down onto the copper sheathing yes?

    Anyway, after I fiddled a bit the DAB+ signal seemed to hold on for a while as I drove. So I think it looks pretty promising at the moment. I will do some more testing over the weekend to see how I go. I'll post some pics of the setup soon.

    FYI from what I understand, I have an un-powered extendable mast antenna. As I retracted the antenna the DAB+ service stopped, so it would seem to bear some relation to the antenna, so that is good.

  8. #518
    Constant Bitrate
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    Jun 2006
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    soyfish, it should screw onto wire not sheathing. Do you have a rod antenna?
    The epitome of Function over form and is probably the best Car PC in Europe.
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  9. #519
    Constant Bitrate soyfish's Avatar
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    Quote Originally Posted by nrgizerbunny View Post
    soyfish, it should screw onto wire not sheathing. Do you have a rod antenna?
    Yes, it's a sort of Rod antenna. It's extendable aluminum like this :

    http://www.buglemcdougle.com/index.p...d&productId=80

    I've got a couple of pictures of my cable setup, it's the teeth on the opposite end to the tip of the plug that I'm wondering about. So it should make contact with the interwoven "braided shielding" as shown in this pic?



    Here is how I have it set up, the teeth connect the the shielding.




  10. #520
    Constant Bitrate
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    Jun 2006
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    okay the outer part of the connector screws to the braided bit of the cable - this is ground.

    the inner part screws to the centre conductor
    The epitome of Function over form and is probably the best Car PC in Europe.
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