Hi Ron,
i open your file and have this error:
Loading: "/home/w/Downloads/whitenoise.grc"
Error: /home/w/Downloads/whitenoise.grc:1:1:FATAL:PARSER:ERR_DOCUMENT_EMPTY:
Start tag expected, '<' not found
>>> Failure
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gnuradio/grc/gui/MainWindow.py",
line 278, in new_page
file_path=file_path,
File
"/usr/local/lib/python2.7/dist-packages/gnuradio/grc/gui/NotebookPage.py", line
47, in __init__
initial_state = flow_graph.get_parent().parse_flow_graph(file_path)
File "/usr/local/lib/python2.7/dist-packages/gnuradio/grc/core/Platform.py",
line 295, in parse_flow_graph
ParseXML.validate_dtd(flow_graph_file, Constants.FLOW_GRAPH_DTD)
File "/usr/local/lib/python2.7/dist-packages/gnuradio/grc/core/ParseXML.py",
line 53, in validate_dtd
raise XMLSyntaxError(parser.error_log)
XMLSyntaxError:
/home/w/Downloads/whitenoise.grc:1:1:FATAL:PARSER:ERR_DOCUMENT_EMPTY: Start tag
expected, '<' not found
what is the gnuradio version for this grc?
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________________________________
From: james jordan <james.jordan....@hotmail.com>
Sent: Monday, March 22, 2021 12:42 PM
To: Ron Economos <w...@comcast.net>; discuss-gnuradio@gnu.org
<discuss-gnuradio@gnu.org>
Subject: Re: how to generate a certain band width white noise
many thanks
________________________________
From: Discuss-gnuradio
<discuss-gnuradio-bounces+james.jordan.999=hotmail....@gnu.org> on behalf of
Ron Economos <w...@comcast.net>
Sent: Monday, March 22, 2021 12:26 PM
To: discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
Subject: Re: how to generate a certain band width white noise
Here's a flow graph that should get you started. The "width" parameter controls
the bandwidth of the noise (but can't be greater than the sample rate).
It's using a UHD sink block for an Etttus B210. Use a sink block that's
appropriate for your hardware. Also, be sure to disable the throttle and null
sink when using hardware.
Ron
On 3/21/21 20:27, james jordan wrote:
Hi Kyeong,
thanks for your reply. what is the default bandwidth for noise source. from my
understanding resampler did not modify bandwidth.
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________________________________
From: Kyeong Su Shin <kss...@postech.ac.kr><mailto:kss...@postech.ac.kr>
Sent: Sunday, March 21, 2021 5:17 PM
To: james jordan
<james.jordan....@hotmail.com><mailto:james.jordan....@hotmail.com>; GNURadio
Discussion List <discuss-gnuradio@gnu.org><mailto:discuss-gnuradio@gnu.org>
Subject: Re: how to generate a certain band width white noise
Hello Jordan:
Just use a "Noise Source" block and a resampler block (if needed; best be
avoided) to adjust the bandwidth. The quality of your "white noise" will
depend on the resampler and the transmitter hardware, though.
Regards,
Kyeong Su Shin
________________________________
보낸 사람: james jordan
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Discuss-gnuradio
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제목: how to generate a certain band width white noise
Hi,
i want to use white noise to test a certain band. such as 2Mhz band width white
noise. how to do this?
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