[linux-dvb] Re: VES1820 PWMREF?

[Holger Waechtler <holger@convergence.de>]

Hi Marko,

Marko KenttXlX wrote:
> Hullo,
> 
> More results of my VES1820 register hacking:
> 
> What is the purpose of PWMREF (0x34) register? It is obviously pulse 
> width modulated configuration register but for what? Default value for 
> it in my Siemens DVB-C rev. 1.5 is 0x52 but if I use for example 0x46 I 
> get my BER halfed and less block errors.
> 
> Datasheet says:
> 
> The value that will be PWM encoded and output on pin FEL when parameter 
> FELPWM of register AGCCONF (index 02) is set to 1.

the datasheet I have here says:

"By default FEL is a front-end lock indicator. [...] But FEL can also be 
configured to output a PWM signal, which value can be programmed through 
the i2c interface (see register PWMREF, index 0x34)."

Unfortunally I don't know what's connected to this pin on the Siemens 
cards, so I can't help you much more...

Maybe you want to trace the wire? At the end we probably should 
pragmatically program the values that work best.

Holger



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