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<span style="font-weight: 700; font-size: 12px; display: block; margin-bottom: 20px;">[<a style="text-decoration: none;" href="#TopText">Attachment(s)</a> from Alex included below]</span>
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<p>Hi all,<br>
<br>
OP25 (specifically scope.py) doesn't seem to work out of the box with<br>
the latest version of GNU Radio, seemingly because it relies on<br>
deprecated components (WX widgets). Today I was able to massage the<br>
code to get it semi-functional with 3.7.11 using my own custom flow<br>
graph, which was reverse engineered from the scope.py application. When<br>
I tune it to a voice channel of a Phase I system I am able to hear<br>
audio, which I consider a success.<br>
<br>
The changes I made to the code base are located here[0], and attached<br>
to this email is my flow graph. I hope that this is helpful to people<br>
new to the project.<br>
<br>
I do have some questions though:<br>
<br>
1. How can this flow graph be optimized? I am not a radio expert by any<br>
means, and while this flow graph works, I don't know *why* it works.<br>
Importantly, the MPSK Receiver block is deprecated and set to be removed<br>
in a future release[1], so I'd like to change it to something more<br>
idiomatic.<br>
<br>
2. What do the veriables "beta", "gain_mu", "alpha", "gain_omega",<br>
"if_rate", and "symbol_deviation" mean? How were they chosen? Why do<br>
they work?<br>
<br>
-- <br>
Alex<br>
<br>
[0] https://github.com/centromere/op25<br>
[1] https://github.com/gnuradio/gnuradio/issues/1083</p>
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<p style="clear: both; margin: 0 0; padding: 0 0 3px 0;"><span style="color: #628C2A; font-weight: 700; font-size: 13px;">Attachment(s) from Alex</span> | <span style="font-size: 13px;"><a style="text-decoration:none;" href="https://groups.yahoo.com/neo/groups/op25-dev/attachments/433303628;_ylc=X3oDMTJyNGsyc2YxBF9TAzk3MzU5NzE0BGdycElkAzIyMDg0NTgyBGdycHNwSWQDMTcwNTY0NDA4OQRzZWMDYXR0YWNobWVudARzbGsDdmlld09uV2ViBHN0aW1lAzE0OTQ0Mjc3ODk-">View attachments on the web </a></span></p>
<p id="attach-count" style="margin: 0 0 2px 0; padding: 10px 0 0 0;"><span style="color: #628C2A; font-weight: 700;"> 1 of 1 Photo(s)</span>
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