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

  1. #211
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    I didn't know any DAB radios sent any voltage along the aerial input?

  2. #212
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    These glass-mount aerials are passive. Not seen an active DAB glass-mount, the only active ones I have seen are chassis mount. These get a ground via the chassis/aerial downlead screen, and have a single wire that takes +12V

    Nigel

  3. #213
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    Possibly why I couldn't get one to work, then...

  4. #214
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    I bought two aerials from DAB on Wheels, I have a Kinetic DRA-1001 which is now on my Golf. This has a separate 12V wire to power the LNB or aerial amp.

    The second aerial I bought was (I recall) a AFAR Amplified Internal Glass Mount Aerial. This only has a coax lead with a SMB connector. When you read the instructions (I know, embarrasing isn't it!), it informs you that a 12V supply down the coax (phantom) is necessary.

    I guess all of the amplified aerials with only a coax lead are like this. However, looking at some of the external aerials, they do not appear to have an amplifier. Other ones do (like the Kinetic STIC DSA-3001) and these require a phantom power supply.

    It's worth checking if you've got an active antenna, reception will be pants with no supply....

    Andy
    Andy Whittaker
    Macclesfield, UK

  5. #215
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    Quote Originally Posted by craigbrass View Post
    I didn't know any DAB radios sent any voltage along the aerial input?
    Pure Highway does....

    Andy
    Andy Whittaker
    Macclesfield, UK

  6. #216
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    Hi

    I finally got around to properly testing the DAB radio together with Andy's plug-in on the road last night. All worked pretty well, no dropouts on DAB, and good reception on FM. Both aerials connected at the same time via a diplexer as previously posted about.

    My DAB aerial is the Kinetic DEGA-4001 glass-mount while the FM aerial is the standard vehicle one. The vehicle is a ducato based motorhome (my only transport).

    Currently I have had to change CF settings so that it shuts-down rather than hibernates due to hibernate issues with the DAB board/plug-in. I only ever travel long distances usually though so a 2 min wait while it boots is not too bad.

    Nigel

  7. #217
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    On hibernate / shut down / stand by, the CF plugin really needs to be sending the power signal to power down the Venice chip followed by a disconnect to the COM port. We solved most problems in our test plugin by doing this.

  8. #218
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    Quote Originally Posted by veletron View Post
    Hi

    I finally got around to properly testing the DAB radio together with Andy's plug-in on the road last night. All worked pretty well, no dropouts on DAB, and good reception on FM. Both aerials connected at the same time via a duplexer as previously posted about.

    My DAB aerial is the Kinetic DEGA-4001 glass-mount while the FM aerial is the standard vehicle one. The vehicle is a ducato based motorhome (my only transport).

    Currently I have had to change CF settings so that it shuts-down rather than hibernates due to hibernate issues with the DAB board/plug-in. I only ever travel long distances usually though so a 2 min wait while it boots is not too bad.

    Nigel
    Nigel,

    Can you talk through the problems with Hibernation? I'll make a fix for this, this was one bit of the plugin I didn't test (nor put in any code for!).

    Andy
    Andy Whittaker
    Macclesfield, UK

  9. #219
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    Quote Originally Posted by craigbrass View Post
    On hibernate / shut down / stand by, the CF plugin really needs to be sending the power signal to power down the Venice chip followed by a disconnect to the COM port. We solved most problems in our test plugin by doing this.

    Thanks, Craig.

    Andy
    Andy Whittaker
    Macclesfield, UK

  10. #220
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    May 2009
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    Hi Andy

    I posted about this on Digital-Car, but this has been doing a Yo-Yo for the last few days.

    Here's the text I posted there:

    "If the plugin is present in the plugins folder, and I start windows/CF from cold (CF is shell) then it is not possible to get the system to hibernate. This bug occurs whether or not I have actually used the DAB radio - I guess when the plugin inits it communicates with the hardware, and prevents a future hibernation.

    If I remove the DAB folder from plugins and cold-boot again, then the system hibernates fine."

    I've done further checking on this (again from a fresh boot, without the plugin present), and can confirm that if I use the DAB test-app to listen to a station then shut down the DAB test app (while CF is minimized), then switch back to CF to hibernate, then hibernate works.

    I'm assuming that the plugin opens up comms to the Venice5 when it is initialized (i.e during CF load), but does not shutdown comms when the user requests the machine to hibernate - windows then vetos the hibernate request.

    As a work-around (to prove the issue is as assumed), shifting the comms init so that it gets called when the user first presses the 'sony firmware' button, and then having something in place to cause a disconnect/close when the user switches to playing something from the library would work. With this in place, CF should hibernate fine if the radio is never selected, and it should hibernate fine if the radio is selected and then de-selected - but it should fail to hibernate if told to do so while the radio is playing.

    If you need someone to test it out before making it available, you already have my email address. Likewise, I don't mind lending a hand coding.

    Nigel

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