Quick update when compared to the old DAB-FM unit in the vehicle.
The new unit appears to have better sensitivity on FM. DAB is about the same which was good anyway.
This unit had no injected system noise back into the audio line (I had to strap the old unit shield to the Audio earth point in the PC). I tested it with no case and the PCB just sitting amongst the USB leads inside the CAR PC case. Only ground was via a 4” aerial patch lead to a chassis mounted aerial changeover relay. This is mounted on the aluminium Car PC case and is auto selected from within the modified Demo software when changing FM-DAB modes.
It sounded great and ran beautifully. I could have been using an expensive standalone car DAB-FM Head unit – really impressed.
So for any one interested, this is a video is a complete rewrite of my application
NOTE: This video has been changed is now the same as Post 2.
EDIT: For NEW Video.
Some excellent work there Mickz, thanks for posting in such detail. Looks like this board is the best option in a while. Can't wait to have a play myself.
Just been reading through your 'project' thread. Very impressive stuff!!
Thanks Dabbler and I can only say again the board is just Great, I was thinking I would need direct access to the hardware and not use the DLL, but the DLL allows me to do anything. The DAB station play list is returned as a list numbering from 0 to the number of found DAB stations. So basically if you have 120 stations then you have 120 presets to select from, send 43 and you get station 43 on the list. The FM station is returned as a frequency, so any FM frequency could be manually entered. This may also be available in DAB but it does not appear in the DLL interface from what I can see.
Originally Posted by Dabbler
The DLL or the Hardware puts a limit on the length of the inbuilt Preset name and also hashes the name. That initially stopped me from having the preset button auto light and the station list from auto scrolling and highlighting. It was easy to overcome in the main code, so finally I have a real DAB-FM Radio in the car. Can you tell I'm over the moon with the outcome of this device and the supplied DLL.
EDIT UPDATE:The problem with short Preset names is overcome by changing an option in a call to the DLL function, so full names are supported in the DLL and radio.
Wonder if they could be talked into doing a Unix interface to cover the guys who use it? Well at least the data is available to roll your own.
As Dabbler said - Excellent write-up Mickz.
Just received a mail from MonkeyBoard - they now have boards back in stock :)
Stock is in! Just bought one!
mmm might have to start thinking about a board for one of these..
Hi Scott – I didn’t see your post until today (1st postings are usually delayed so it’s either that or I’m going blind). Anyway welcome and thanks for the words.
Originally Posted by scottydj2
Stretch4x4 It’s a really nice module.
Been thinking about this, what are peoples plans for an antenna in car.
Just use the one provided and hide it somewhere? Or get an adapter to go from the SMA to motorola connector on the car's radio?
I suppose you could easily crimp an SMA connector onto the existing car antenna feed.
The car aerial will be useless for DAB if it’s not designed for it. The Aerial supplied would be ok in main reception areas however you really need an amplified roof mounted aerial as you get further away from the main coverage area.
I had good results with a small magnetic aerial similar to the one supplied with the module but reception improved when I installed an amplified roof mounted DAB-FM unit. FYI my location is getting towards the outer coverage map area.