Re: [Discuss-gnuradio] gain control extreme non-linearity--is my hardware broken?

[Marcus Leech]

Matt Ettus wrote:

> Lee Patton wrote:
>  
>
> > I have seen that problem too. It is the result of incorrect python
> > integer/float semantics during the setting of the gc2 variable in the
> > set_gain() method found in db_dbs_rx.py. I will post a complete patch
> > once I am finished investigating some other gain issues that I have
> > noticed. 
> >
> > For now, the following change should work:
> >
> > old: gc2 = int(round(31 * (1-gain/24)))
> > new: gc2 = int(round(31 * (1-gain/24.)))
> >    
>
>
> In the mean time, I have checked this in.  Thanks for finding the problem.
>
> Matt
>
>
>  
Applied the fix, and it seems to have mostly worked--there's still some 
weirdness
 between the 40 and 50 settings, but it's much improved.  I thought 
that perhaps
 my hardware was broken--like one of the VGAs wasn't working.