Strange channel scanning problem

Hi,

I have a DM520HD receiver, and I'm having problems tuning a certain frequency/set of channels.

The Frequency is 514 MHz, and the channels are HD channels (the only HD channels on the current transmitter). These are also the only channels that are in T2 mode and have another PLP ID 1.

The situation is as follows.

A. When I'm using stock firmware:

• The channels are found when doing an automatic channel scan. But, when I try to watch them the tuning fails.
• If I then do a manual channel search on the said frequency, with the following settings:
  • System:DVB-T2
  • PLP ID: 001
  • Other settings: Default.
    
    ...the channels start working. All good

B. When using the latest OpenPLI- or OpenVision firmwares (haven't tested any others):

• The channels are not found when doing an automatic channel scan (all other channels are found and working though).
• When doing a manual scan with the same settings as above, the channels are still not found.
  

Any ideas why?

The box is located in Sweden.

Quote from emosim

Probably the signal is weak ? And transmitter from another geographical position than other channels ?

Emo

That could be it, but I don't see why it should work with stock firmware in that case? I tried this many times, but with the same result.

Quote from emosim

Image you tested could have different driver, released at different dates... this generally has an influence because its the driver/software used inside the tuner (microcode).

Emo

Ok, that sounds reasonable. Would it be possible to use the driver from the stock firmware in a custom one? Or at least check the driver version?

I will try that, thank you for the suggestion.

Unfortunately it didn't help. The files were identical. Do you have any other ideas on how to solve it?

Quote from emosim

Check all the other files inthat extra folder, the one i gave you is the main ond but the you have the partical gikes for every piece of hardware of the box, including the one for the tuner itself.

Naturally between the tests yiu will have to reboot the box as drivers are loaded during boot.

Emo

Thank you. Actually, I installed Newnigma2 and on that image it actually worked from scratch. So I'm a happy camper right now :). But will look into it more when/if the problem shows up the next time.