[linux-dvb] Re: Q: to Frontend_info structure

[Holger Waechtler <holger@qanu.de>]

On Sunday 21 March 2004 14:20, Rainer.scherg wrote:
> Hi,
>
> I have some questions to the frontend-info structure in the current
> dvb-api3:
>
> How are the following frequency-variables defined?
>
> --- snip ---
> 2.1.3 frontend information
>
> struct dvb_frontend_info {
>   char name[128];
>   fe_type_t type;
>   uint32_t frequency_min;
>   uint32_t frequency_max;
>   uint32_t frequency_stepsize;
>   uint32_t frequency_tolerance;
>   uint32_t symbol_rate_min;
>   uint32_t symbol_rate_max;
>   uint32_t symbol_rate_tolerance; /* ppm */
>   uint32_t notifier_delay; /* ms */
>   fe_caps_t caps;
> };
> --- snap ---
>
>
> My guess is QPSK (fe_type) == MHz and  kHz for dvb-c and dvb-t.
>
> But does this also apply to frequency_tolerance and
> frequency_stepsize? My guess here is, ..._stepsize always is
> in kHz and ..._tolerance is in Hz.

in the kernel API everything is defined in Hz for DVB-C and DVB-T, for DVB-S 
values are specified in kHz.

Holger


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