OP25: Difference between revisions
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Confirmed working in Alameda for voice! |
m →P25 (EBRCS): talkgroups link |
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<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. | ||
Revision as of 23:04, 13 June 2020
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
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
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.
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