[Ovmsdev] Interrupts when hearing from digital radio station

[Mark Webb-Johnson]

There has been no change on the radio side (which is the most likely thing causing your interference).

The testing we did on the 3.1 modules was pretty close to passing as it was. Just at a couple of frequency points it edged very slightly over the permitted values. Really just a few percent. Annoying as hell.

The filters we added are on the power side. Primarily intended to stop the module interfering with other devices on the same power line. We could have gotten the same benefit by adding magnetic ferrite rings to the vehicle cables (but adding them to the board is more convenient). I guess there could be some EMI style interference improvement, but it wasn’t measurable. The lab didn’t ask us to make any changes on the EMI front.

Regards, Mark.

> On 28 Jun 2019, at 1:36 PM, Martin Hofgesang <martin.hofgesang at gmx.de> wrote:
> 
> Hi,
> 
> Sorry to bother again with this topic, but I only wanted to ask if the new CE certified 3.2 module could make a difference here as I read it has some new filters on it?
> 
> Regards
> 
> 
> 
> Martin
> 
> Mit Hilfe von kathalytischen Konvertern gesendet. 
> 
> Am 24.06.2019 um 10:10 schrieb Martin Hofgesang <martin.hofgesang at gmx.de <mailto:martin.hofgesang at gmx.de>>:
> 
>> Hello all,
>>  
>> When my OVMS-module is connected to my car and I am only doing some tracing of CAN-ids [1] I have trouble with hearing radio from radio station using DAB+.
>>  
>> The radio frequently interrupts shortly when listening to such a radio station.
>> When OVMS is disconnected everything is fine and I can listen to the radio without interrupts.
>>  
>> I have to say, I did not mount my OVMS, so it lays on the floor or underneath the seat in my car, including the GPS- and GSM-antenna, I hope it will be better, when I mount the Antennas outside underneath the front trunk of my car (which has, luckily, a cover made from plastik).
>>  
>> Did anyone have also problems with digital radio stations?
>>  
>> Regards
>>  
>>  
>> Martin
>>  
>>  
>>  
>> [1] for example the command "can log crtd /sd/log/speed.txt 1:5d7"
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