[op25-dev] Re: sockaudio.py startup?

John Ackermann N8UR jra@febo.com [op25-dev] op25-dev at yahoogroups.com
Thu Jul 6 19:28:01 UTC 2017


Hi Bill and Max --

I'm a little confused where the frequency is set.  Are  you putting the 
control channel frequency on the command line with "-f", and then 0 in 
trunk.tsv, or the other way around?

I'm still struggling to get things running here.

Thanks,
John
----

On 07/05/2017 07:35 PM, 'wa8wg' wa8wg at centurytel.net [op25-dev] wrote:
> Max,
> 
> I now have excellent audio using netcat & aplay with the zero center 
> frequency in trunk.tsv and the sampling rate –S 1000000 in the rx.py 
> command line.     Still no sign though of sockaudio ever starting up.
> 
> Thank you!
> 
> Bill
> 
> William G. Becks, WA8WG
> 
> N7027 Shady Lane Circle
> 
> Porterfield, WI 54159
> 
> Telephone: 715.735.0131
> 
> E-Mail: wa8wg at centurytel.net <mailto:wa8wg at centurytel.net>
> 
> *From:*op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com]
> *Sent:* Wednesday, July 5, 2017 6:24 PM
> *To:* op25-dev at yahoogroups.com
> *Subject:* RE: [op25-dev] Re: sockaudio.py startup?
> 
> Disregard my previous message.    I had to reinitialize the SDR and 
> rx.py now loads with a zero center frequency in trunk.tsv using the 
> lower sample rate as suggested.
> 
> Bill
> 
> William G. Becks, WA8WG
> 
> N7027 Shady Lane Circle
> 
> Porterfield, WI 54159
> 
> Telephone: 715.735.0131
> 
> E-Mail: wa8wg at centurytel.net <mailto:wa8wg at centurytel.net>
> 
> *From:*op25-dev at yahoogroups.com <mailto:op25-dev at yahoogroups.com> 
> [mailto:op25-dev at yahoogroups.com]
> *Sent:* Wednesday, July 5, 2017 6:08 PM
> *To:* op25-dev at yahoogroups.com <mailto:op25-dev at yahoogroups.com>
> *Subject:* RE: [op25-dev] Re: sockaudio.py startup?
> 
> I tried setting the center frequency to zero in my trunk.tsv and turning 
> the sampling rate down but rx.py doesn’t like the zero center 
> frequency.   See below.   Where can I download the patched version that 
> allows a zero center frequency statement?
> 
> *pi at raspberrypi:~/op25/op25/gr-op25_repeater/apps $ ./rx.sh*
> 
> *linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown*
> 
> **
> 
> *setting gain lna to 49*
> 
> *set_center_freq: 0*
> 
> *./rx.sh: line 2: $'\r': command not found*
> 
> *./rx.sh: line 3: $'\r': command not found*
> 
> *./rx.sh: line 4: $'\r': command not found*
> 
> *./rx.sh: line 5: $'\r': command not found*
> 
> *./rx.sh: line 6: $'\r': command not found*
> 
> *./rx.sh: line 7: $'\r': command not found*
> 
> *./rx.sh: line 8: $'\r': command not found*
> 
> *./rx.sh: line 9: $'\r': command not found*
> 
> *./rx.sh: line 10: $'\r': command not found*
> 
> *./rx.sh: line 11: $'\r': command not found*
> 
> *pi at raspberrypi:~/op25/op25/gr-op25_repeater/apps $*
> 
> Thank you,
> 
> Bill
> 
> William G. Becks, WA8WG
> 
> N7027 Shady Lane Circle
> 
> Porterfield, WI 54159
> 
> E-Mail: wa8wg at centurytel.net <mailto:wa8wg at centurytel.net>
> 
> *From:*op25-dev at yahoogroups.com <mailto:op25-dev at yahoogroups.com> 
> [mailto:op25-dev at yahoogroups.com]
> *Sent:* Wednesday, July 5, 2017 4:03 PM
> *To:* op25-dev at yahoogroups.com <mailto:op25-dev at yahoogroups.com>
> *Subject:* RE: [op25-dev] Re: sockaudio.py startup?
> 
> yes, though it depends on whether a center frequency has been 
> specified.  If so then OP25 remains tuned to the center frequency and if 
> not, it retunes the SDR each time a frequency change is needed.  From 
> what I've seen the slow sample rate (250,000) on the PI causes the 
> changes to be somewhat slow, so I was getting the first word(s) of calls 
> chopped off.  Currently (for the PI) we recommend -S 1000000 and setting 
> the center frequency to zero, or omitting it.  Another user reported 
> getting a crash with this, and a possible workaround for it has just 
> been pushed to the repo....  It should be possible to set the center 
> frequency to zero.  When this is done the trunk-tracking mode should 
> work fine no matter how wide the system is, but it does preclude the use 
> of the log-all-talkgroups-to-disk mode, unfortunately...
> 
> Max
> 
> 
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