You are welcome, glad I could help :) The list is mirrored here: https://lists.gnu.org/archive/html/discuss-gnuradio/ Read-only, of course.
Fabian Am 09.07.21 um 14:28 schrieb Phil Wiggum: > Hi Fabian! > > Yes I Xlating and filter the Bw to 100K and then decimating to SampRate 100k > to > be get a morefine details in the GUI Frequency. > > I tested with a second Xlating in parallel and it worked perfect. > > PS. Is there any mirroring of this list with a WEB gui? > > /Thanks > Phil > >> Hi Phil, >> I read your post like four times and could not figure out what you are >> doing and what you are trying to achieve. Where is your target signal >> originally located? At fc? Is fc = 100k? Why do you mix 100k down with >> the Frequency Xlating FIR and then define a different center frequency >> for your Frequency sink? An example graph would be helping. >> Nevertheless, it seems like you just want to shift the frequency around >> (i.e., mix the signal) and low pass filter it. You can do this as many >> times in parallel as you want. And maybe using the Low Pass Filter >> component will make things easier, as you don't have to define taps >> manually. Mixing can be done with a complex signal source combined with >> a multiplier or you use the Frequency Xlating FIR with [1] as taps. Note >> that a positive center frequency for the Frequency Xlating FIR will >> actually mix the signal down (negative frequency). >> >> Hope that helps a bit, >> Fabian >> >> Am 08.07.21 um 21:32 schrieb Phil Wiggum: >>> I Have this setup >>> >>> SDR(fc) >>> -> 'Frequency Xlating FIR Filter' (Low pass, Center Freq: 100k) >>> -> Resampler( 5M/100k) >>> -> 'QT GUI Frequency Sink' (Center: fc+100k, Bw 100k) >>> And parallel with QT GUI FSink, >>> -> 'Log Power FFT' -> Python (Peak detektor) >>> >>> My problem I have is the read out from 'Log Power FFT' starts at 'fc+100k'. >>> I would like it to start 'fc+50k'. >>> Can I use 'Frequency Xlating FIR Filter' again and lower my frequency >>> starting point? >>> >>> Like this parallel with QT GUI FSink, >>> -> 'Frequency Xlating FIR Filter' (????) >>> -> 'Log Power FFT' -> Python (Peak detektor) >>> >>> What kind on taps do I need if this is possible? >>> >>> /Phil >>> >
