[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] bug in wfm_rcv_pll and fix, who has stereo FM s
Re: [Discuss-gnuradio] bug in wfm_rcv_pll and fix, who has stereo FM specs/info and noise and gain issues
Wed, 20 Jun 2007 20:29:52 -0700
Thunderbird 220.127.116.11 (X11/20070326)
>> I would try this with the regular (non-PLL) FM demod. I think the
>> rolloff of the PLL tracking loop is what is giving you the lower gain.
> Yes, that seems to be the problem.
> For now I switched to using the non-PLL FM-demod.
> Do you know if/how I can make a PLL which does not have this high roll-of.
> I played with the pll-parameters but that doesn't seem to help.
> It is critically damped, so that is probably the best we can get with this
> Would I need another type of pll with a higher order loop-filter or something
> like that.
I think it's just a question of bandwidth. Have you confirmed that the
PLL has at least 60 kHz of bandwidth?