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Our feeds will be offline for a bit this afternoon as we reconfigure and upgrade hardware.
Stay tuned to this thread, though, for an exclusive behind the scenes look at what it takes to provide RadioFlav™!
Let's start by taking a look at the software we use:
SDRTrunk is our primary workhorse. It is free, open source software that allows us to utilize multiple SDR dongles to intercept and decode P25 digital radio traffic on MARCS-IP system. https://github.com/DSheirer/sdrtrunk
SDRTrunk is our primary workhorse. It is free, open source software that allows us to utilize multiple SDR dongles to intercept and decode P25 digital radio traffic on MARCS-IP system. https://github.com/DSheirer/sdrtrunk
We prefer SDRTrunk as it can feed both Calls and Audio to our multiple streams on Broadcastify. We currently feed 3 different streams.
Columbus Police - Event:
https://www.broadcastify.com/listen/feed/33458
OSU:
https://www.broadcastify.com/listen/feed/33517
Calls:
https://www.broadcastify.com/calls/node/261
Columbus Police - Event:
https://www.broadcastify.com/listen/feed/33458
OSU:
https://www.broadcastify.com/listen/feed/33517
Calls:
https://www.broadcastify.com/calls/node/261
SDRTrunk also picks up Radio to Radio calls. Similar to a phone call, in where a radio user is talking directly to another, vs on a group channel / talkgroup. We hear a lot of interesting chatter this way. Sometimes you will see it on our YouTube
Speaking of our YouTube, we use @OBSProject to capture the SDRTrunk window and audio and stream it.
VB- Audio's Virtual Audio Device drivers allow us to have and to direct audio amongst multiple programs via virtual line-in and line-out devices in windows
https://vb-audio.com/Cable/index.htm
https://vb-audio.com/Cable/index.htm
Next up: We use ProScan to interconnect our digital scanners to windows to allow remote control and listening of them. This generally serves as a backup to SDR. It allows us to directly tune to a talkgroup if we are trying to follow specific activity
http://proscan.org/
http://proscan.org/
And a friendly shout-out to @OpenMHz and Trunk Recorder!
Our friends at @ScanCbus host it
It allows us to quickly filter talkgroups and view recordings. https://openmhz.com/system/marcscbus
Our friends at @ScanCbus host it
It allows us to quickly filter talkgroups and view recordings. https://openmhz.com/system/marcscbus
We'll have a look at our hardware later tonight, so check back soon!
Hardware:
A Lenovo ThinkCentre M93p with Intel i7-4765T, 16gb Ram and 256gb SSD is used to run SDRTrunk, ProScan, and OBS
A Lenovo ThinkCentre M93p with Intel i7-4765T, 16gb Ram and 256gb SSD is used to run SDRTrunk, ProScan, and OBS
We utilize 6x of the NooElec NESDR Nano 3's, connected to the PC via a 7 port USB hub
https://nooelec.com/store/nesdr-nano-three.html
https://nooelec.com/store/nesdr-nano-three.html
Antenna wise we are using a cheap
26MHz - 1200 MHz 3dB whip antenna. It connects to the SDR's via 5-2050MHz 6-Way Coaxial Cable Splitter, adapters, and SMA jumper cables.
26MHz - 1200 MHz 3dB whip antenna. It connects to the SDR's via 5-2050MHz 6-Way Coaxial Cable Splitter, adapters, and SMA jumper cables.
All of this is housed in a pvc project box with two 5vdc fans connected to the free usb port for airflow cooling over the SDR's
Here's a pic of the build in progress
Here's a pic of the build in progress
