[pvrusb2] frequencies below 50MHz

Mike Isely isely at isely.net
Fri Jun 22 11:18:25 CDT 2007


On Fri, 22 Jun 2007, Tobias Knieper wrote:

> Hello list,
> I'm using my pvrusb2 box (model 29039 Rev D257 PAL-B/G-I-D/K-SECAM) for a year 
> or so but never get it to work with a channel of frequency 48,25 MHz (PAL, 
> Germany). The next channel at frequency 55,25 MHz works fine.
> 
> Are there any hardware or driver limitations to use that frequency? Or can 
> anyone hint me to a line of code which might be the reason for the 
> limitation?
> 
> Thanks and best regards,
> Tobias Knieper

Tobias:

There are range checks in the driver.  However to understand this 
correctly I need to know which driver version you are using.  Is this an 
in-kernel driver, and if so which kernel version?

The current driver version range checks against the "legal" frequency 
range reported by the tuner module itself.  But older pvrusb2 driver 
versions used a hardcoded assumedly conservative limit - and the bottom 
at that time was 55.25MHz.  So, which driver version are you running?  
If it is in-kernel, tell me the kernel version.  Output from dmesg will 
help here as well.

  -Mike


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