OP25 - Revision history

Ⅹ: pi tip "-O hw:CARD=Headphones,DEV=0"

2020-06-18T10:00:22Z

pi tip "-O hw:CARD=Headphones,DEV=0"

← Older revision		Revision as of 03:00, 18 June 2020
Line 17:		Line 17:

	<pre>rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U 2> stderr.2</pre>		<pre>rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U 2> stderr.2</pre>

			Specify 3.5mm audio jack as output on Raspberry Pi:
			<pre>./rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U -O hw:CARD=Headphones,DEV=0 2> stderr.2</pre>

	Talk groups broadcasting on this network: https://www.radioreference.com/apps/db/?sid=5317		Talk groups broadcasting on this network: https://www.radioreference.com/apps/db/?sid=5317

	Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.		Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.


	== P25 (San Francisco) ==		== P25 (San Francisco) ==

Ⅹ: SF

2020-06-14T20:58:38Z

← Older revision		Revision as of 13:58, 14 June 2020
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	Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.		Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.


			== P25 (San Francisco) ==

			<pre>pi@pisdr:~/op25/op25/gr-op25_repeater/apps
			$ ./rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 769.84375e6 -o 17e3</pre>

			<pre>NAC 0x2b0 WACN 0xbee00 SYSID 0x2bb 769.843750/799.843750 tsbks 3386
			voice frequency 769.531250 tgid(s) 6002 None 11.0s ago count 194
			</pre>

Ⅹ: /* P25 (EBRCS) */ talkgroups link

2020-06-14T06:04:54Z

P25 (EBRCS): talkgroups link

← Older revision		Revision as of 23:04, 13 June 2020
Line 17:		Line 17:

	<pre>rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U 2> stderr.2</pre>		<pre>rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U 2> stderr.2</pre>

			Talk groups broadcasting on this network: https://www.radioreference.com/apps/db/?sid=5317

	Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.		Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.

Ⅹ: Confirmed working in Alameda for voice!

2020-06-14T05:57:43Z

Confirmed working in Alameda for voice!

New page

== Pi 3 Setup ==

Install current version (9) of debian flavor linux

Pre-built image with SDR tools, does not have OP25 installed:
https://pisdr.luigifreitas.me

== P25 (EBRCS) ==

Get the code and run the install script to build and install:
https://github.com/AaronSwartzDay-SSP/op25

Configure trunk.tsv to set proper talk group (0x1f1) and mode

<pre>rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 772.8437e6 -o 17e3 -T trunk.tsv -V -2 -U 2> stderr.2</pre>

Note: this tends to come in garbled, you also have to be in range of the actual signal, there are several sources around the bay area, this is specifically for the Southwest Region, which covers a large radius from around Union City. Nudging the frequency '<' or '>' from the terminal seems to help lock in a clear demodulation.

=== Resources ===

*https://www.hagensieker.com/wordpress/2018/07/17/op25-for-dummies/
*https://www.sigidwiki.com/wiki/Project_25_(P25)
*https://drive.google.com/file/d/1siOQ2AIjDnvdMPWu7WqDhQKSByg7HIRJ/view
*https://hackaday.com/2019/12/20/all-your-sdr-software-in-a-handy-raspberry-pi-image/
*https://github.com/AaronSwartzDay-SSP/op25/blob/master/README-rpi3-liquidsoap