While all of this has been mentioned previously on our op25-dev list, I'd like
to take this opportunity (from the GR 2011 Conference in Philadelphia, Penna.)
to announce a couple of sub-projects which could be put off forever (nothing is
ever truly "finished" ;-) but nonetheless would benefit from wider examination
and comment, especially at this time...
First is our integration with Asterisk (VOIP), specifically their app_rpt
project to provide a rich set of repeater semantics (to include NBFM with CTCSS
and P25). Targeted features working today are:
* Simultaneous multi-channel transmission/reception
* Uses USRP and/or conventional receiver/transmitter hardware
* Generic interface to Asterisk via app_rpt (full VOIP, radio
control, and standard repeater functions)
* Features: P25, analog NBFM with CTCSS
* Expected to be fully "ROIP" [Radio Over IP] compatible For details on
the repeater stuff please visit
http://www.sedition.org.au/op25/wiki/RepeaterPage
Second is an enhanced version of our signal visualization and analysis app
which features:
* Spectrum plot
* Baseband oscilloscope
* Eye Pattern Diagram (Datascope) display supporting several
standard symbol rates
* Constellation Diagrams
* Demodulated Symbol Output
* Correlation (including Fast Auto-Correlation)
* Direct-frequency entry, signal gain and fine-tuning controls
* User-selectable demodulator (FSK4 or QPSK) A goal for the app is to
accommodate a range of targets:
* Choice of USRP, discriminator-tap, or "audio-IF" hardware modes
* Supports either GL or non-GL display mode
* Lower and middle range PC hardware, not just the latestThe link to
the project page is
http://www.sedition.org.au/op25/wiki/SignalScopePage
Best Regards
Max
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