On 14 Mar 2017 19:19:37 +0000
"ikj1234i@yahoo.com [op25-dev]" <op25-dev@yahoogroups.com> wrote:

> the message "osmosdr source_c creation failure" suggests the SDR
> device isn't being seen by scope.py.
>
> To rule out hardware and/or driver and/or permission issues let's
> have you first run the osmocom_fft app to test and verify basic SDR
> connectivity...
>
> also scope.py wants a frequency (even a dummy frequency) such as
> scope.py -f 858.7e6. I highly recommend adding a sampling rate (-S)
> and offset (-o) as well as a correction for PPM drift (-q). This
> should be enough to get tuned to the trunk CC as a first step...
>
> Max

I'm using my flightaware dongle. The MCX fell out of my DVB-T. :-(

Here is the FFT:
osmocom_fft -f 88.5e6 -s 2e6
linux; GNU C++ version 4.8.5; Boost_105400; UHD_003.009.005-0-unknown

Works fine.

gr-osmosdr 772fb153 (0.1.1git) gnuradio v3.7.10.1-237-g81e7af7b
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf
Using device #0 Realtek RTL2832UFA SN: 00001000
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Exact sample rate is: 2000000.052982 Hz
[R82XX] PLL not locked!

----------------------------------------------------

/usr/local/src/op25/op25/gr-op25_repeater/apps> ./scope.py -f
772.54375e6 linux; GNU C++ version 4.8.5; Boost_105400;
UHD_003.009.005-0-unknown

gr-osmosdr 772fb153 (0.1.1git) gnuradio v3.7.10.1-237-g81e7af7b
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf
Using device #0 Realtek RTL2832UFA SN: 00001000
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
gain: name: LNA range: start 0 stop 0 step 0
supported sample rates 250000-2400000 step 24000
Traceback (most recent call last):
File "./scope.py", line 2751, in <module>
app = stdgui2.stdapp(p25_rx_block, "APCO P25 Receiver", 3)
File
"/usr/local/lib64/python2.7/site-packages/gnuradio/wxgui/stdgui2.py",
line 46, in __init__ wx.App.__init__ (self, redirect=False) File
"/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line
8628, in __init__ self._BootstrapApp() File
"/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line
8196, in _BootstrapApp return _core_.PyApp__BootstrapApp(*args,
**kwargs) File
"/usr/local/lib64/python2.7/site-packages/gnuradio/wxgui/stdgui2.py",
line 49, in OnInit frame = stdframe (self.top_block_maker, self.title,
self._nstatus) File
"/usr/local/lib64/python2.7/site-packages/gnuradio/wxgui/stdgui2.py",
line 76, in __init__ self.panel = stdpanel (self, self,
top_block_maker) File
"/usr/local/lib64/python2.7/site-packages/gnuradio/wxgui/stdgui2.py",
line 98, in __init__ self.top_block = top_block_maker (frame, self,
vbox, sys.argv) File "./scope.py", line 212, in __init__
self.__init_gui(frame, panel, vbox) File "./scope.py", line 544, in
__init_gui self.data_scope = datascope_sink_f(self.notebook,
samples_per_symbol = 10, num_plots = 100) File "./scope.py", line 1467,
in __init__ self.st = blocks.message_sink(gr.sizeof_float, msgq, 1)
File
"/usr/local/lib64/python2.7/site-packages/gnuradio/blocks/blocks_swig0.py",
line 1547, in make return _blocks_swig0.message_sink_make(*args)
NotImplementedError: Wrong number or type of arguments for overloaded
function 'message_sink_make'. Possible C/C++ prototypes are:
gr::blocks::message_sink::make(size_t,gr::msg_queue::sptr,bool)
gr::blocks::message_sink::make(size_t,gr::msg_queue::sptr,bool,std::string
const &)

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