Hi Ron, That is good! I have Gnuradio 3.7.13.4 on one of my computers. Please send me the grc file as an attachment as soon as you can. This way, I can learn how to use the Gnuradio Polyphase Channelizer block.
Thank you! Respectfully, George On Tue, Dec 22, 2020 at 8:58 AM Ron Economos <[email protected]> wrote: > It's a GNU Radio 3.7 flow graph. It can be converted by GNU Radio 3.8. > > Ron > On 12/22/20 07:47, George Edwards wrote: > > Hi Ron, > > Thanks again for your help. > > When I click on the link you provided, I get the XML file. Please send me > the actual grc file as a standalone. > > Thank you! > > Regards, > George > > On Mon, Dec 21, 2020 at 2:47 PM Ron Economos <[email protected]> wrote: > >> You should probably use an add block instead of Streams to Stream. >> Here's an example flow graph. >> >> http://www.w6rz.net/pfb-filter-10.grc >> >> Ron >> >> On 12/21/20 11:20, George Edwards wrote: >> > Hello, >> > >> > I have three signals routed to the Gnuradio Polyphase Channelizer >> > Block. The system operates at a sample rate of 90 kHz with 3 channels >> > spaced 25 kHz apart. One channel is centered around DC and the other >> > two at +/-25 kHz. The 3 waveforms are routed into a Gnuradio Streams >> > to Stream Block, so that a simple concatenated stream flows into the >> > Gnuradio Polyphase Channelizer. I also set the Channelizer Block to >> > use 120 Taps and provide 3-outputs. Here are my questions on observing >> > the outputs >> > >> > Q1. I was expecting each output (block set to 3 outputs) to be at the >> > sample rate (90 kHz/3 =) 30 kz in each of the 3-plots. The plots show >> > a sample rate based on the original rate of 90 kHz. Why is this? >> > >> > Q2. I expected each output waveform to be centered around DC, but they >> > were instead centered around -25 kHz. Why? >> > >> > Q3. The output bandwidth for each waveform seems a little bigger than >> > the input, why? >> > >> > I will appreciate any help that assists to point me in the right >> > direction. >> > >> > Regards, >> > George >> >>
