I cannot tune some frequencies

[mcross]

Hi!

 

I cannot tune some frequencies on my DVB-C tuner.

 

I am using DVBViewer 4.2.1.0, Technisat Cablestar HD 2.

 

My local DVB-C provider in Czech rep. distribute channels on +/- 8 frequencies.

 

Provider is using 6900, QAM 64. Frequencies 146, 154, 162 MHz cannot be tuned, SW is not able to do it. These MHz are skiped, why pls?

 

Frequencies 322, 330, 370, 378 MHz are correctly tuned and channels are without problems played.

 

Can anybody help me?

 

Thanks, Mark