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]
<mailto:[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
