I am running a Raspberry Pi3-B on Raspbian Jessie with pixel.

This is my startup (rx.sh) file.

./rx.py --args 'rtl' --gains 'lna:49' -f 853.9125e6 -T trunk.tsv -q 0 -S 2560000 -w 2> stderr.2

My local system (MPSCS) is standard C4FM 9600 baud P25 (non-simulcast) and I don’t think I need the tdma support but rx.py will not successfully start without it in the command line for some reason. Everything looks good in the rx.py terminal window but there is no sign that sockaudio.py ever starts and runs in the background.

Thank you!

Bill

William G. Becks, WA8WG

N7027 Shady Lane Circle

Porterfield, WI 54159

E-Mail: mailto:wa8wg@centurytel.net wa8wg@centurytel.net

From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Wednesday, July 5, 2017 8:50 AM To: op25-dev@yahoogroups.com Subject: [op25-dev] Re: sockaudio.py startup?

could you post the command line you're using to invoke? Also, what hardware platform are you running this on?

Sorry, that doesn’t work because of the frequency span of the MPSCS system that I am monitoring in my area. A sampling rate of less than results rx.py reporting tsblks 0. Is it possible there might be an error in the additional lib and app files that I pulled from the webpage text may be in error? I did run dos2unix on each of the files once I captured the text from the webpage. Can you add these to your max branch?

Thank you,

Bill

William G. Becks, WA8WG

N7027 Shady Lane Circle

Porterfield, WI 54159

Telephone: 715.735.0131

E-Mail: mailto:wa8wg@centurytel.net wa8wg@centurytel.net

From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Wednesday, July 5, 2017 10:57 AM To: op25-dev@yahoogroups.com Subject: RE: [op25-dev] Re: sockaudio.py startup?

okay it's possible there are multiple issues happening here - as a first step lets have you lower the sampling rate to 1,000,000 - so, -S 1000000

Once we can rule out the samp rate as a possible cause the next step may become more clear....

Max

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

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: mailto:wa8wg@centurytel.net wa8wg@centurytel.net

From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Wednesday, July 5, 2017 6:08 PM To: op25-dev@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@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@raspberrypi:~/op25/op25/gr-op25_repeater/apps $

Thank you,

Bill

William G. Becks, WA8WG

N7027 Shady Lane Circle

Porterfield, WI 54159

E-Mail: wa8wg@centurytel.net

From: op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] Sent: Wednesday, July 5, 2017 4:03 PM To: op25-dev@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

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@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@centurytel.net mailto:wa8wg@centurytel.net

*From:*op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] *Sent:* Wednesday, July 5, 2017 6:24 PM *To:* op25-dev@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@centurytel.net mailto:wa8wg@centurytel.net

*From:*op25-dev@yahoogroups.com mailto:op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] *Sent:* Wednesday, July 5, 2017 6:08 PM *To:* op25-dev@yahoogroups.com mailto:op25-dev@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@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@raspberrypi:~/op25/op25/gr-op25_repeater/apps $*

Thank you,

Bill

William G. Becks, WA8WG

N7027 Shady Lane Circle

Porterfield, WI 54159

E-Mail: wa8wg@centurytel.net mailto:wa8wg@centurytel.net

*From:*op25-dev@yahoogroups.com mailto:op25-dev@yahoogroups.com [mailto:op25-dev@yahoogroups.com] *Sent:* Wednesday, July 5, 2017 4:03 PM *To:* op25-dev@yahoogroups.com mailto:op25-dev@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

Ah, understand now.  Thanks!

On Jul 6, 2017, 5:58 PM, at 5:58 PM, "ikj1234i@yahoo.com [op25-dev]" op25-dev@yahoogroups.com wrote:

it's a silly historical artifact of OP25 that when -T is in use the CC frequency is taken from the trunk TSV file, but you still have to give a valid (dummy) frequency on the command line with the -f parameter. As far as the trunk TSV there is the trunk control channel frequency (or a comma separated list of CC frequencies), and separately there is the "center" frequency. I recommend setting that to zero (unless the log-all-talkgroups-to-disk mode is being used). Likewise use "-S 1000000", unless the logging mode is being used.

Max