Hi Gerhard, I use the following hardware for tests: - Obviously the controlling computer (I haven't had a chance to test it on Raspbian, but Debian Buster works pretty well)
- PlutoSDR as the base; LimeSDR-mini should work well but my dev board can't use the latest software so not testing on it yet; the USRP B200(/mini) (it has great support, features and drivers, but pretty expensive); other duplex SDRs supported by gr-osmosdr should work as well but not tested at all; RTL-SDR if you want to use separate TX and RX devices. - RF switches (I use RelComm RDS-SR026 found cheaply on Ebay but SV1AFN.com relays may work better) - Cheap linear amplifier found for 20-30 Euros on Ebay, I have a bunch of them from 0.5 Watt to 3 Watt. For FM and FSK non-linear works as well. I also have some Kuhne filtered linears but they are too powerful for my needs. - Appropriate filters (band-pass or low pass from Temwell, Toko, etc.). In Europe can be sourced from RF-Microwave. - USB relay board with FT232 chipset. Can be found pretty cheap on Amazon or Ebay, the blueish-white board variety. Example: https://www.amazon.co.uk/4-Channel-Type-B-Controller-Automation-Robotics/dp/B07TVTHY2Q/ref=sr_1_8?crid=K1WGVFE8QRGV&keywords=usb+relay+board&qid=1571326031&sprefix=usb+relay%2Caps%2C182&sr=8-8 or https://www.amazon.co.uk/8-Channel-Controlled-Programmable-Computer-Automation/dp/B076CLT2WK/ref=sr_1_7?crid=K1WGVFE8QRGV&keywords=usb+relay+board&qid=1571326031&sprefix=usb+relay%2Caps%2C182&sr=8-7 If you find bugs or think of some useful features for repeater mode it's greatly appreciated to leave a Github ticket. Depending on my workload I'll do my best to work on this. Picture of my messy test setup: https://www.radioamator.ro/forum/download/file.php?id=3807&sid=0c124ba914201e8d1423f687f104e97f&mode=view Adrian On Thu, Oct 17, 2019 at 6:05 PM <gerh...@oe3gbb.eu> wrote: > Hi Adrian, > > I am operating a repeater (OE3XNB) and would be interested to run a test. > What hardware do we need? > > 73's > > Gerhard OE3GBB > > > > Am 17.10.2019 14:00, schrieb Adrian Musceac: > > Hi, > I made some more progress working on my application[1]. > First of all, it is now possible to run it headless (maybe even > daemonized) and control it remotely using a telnet client. > Second, I have added support for mixed mode repeater (Codec2/FM or > viceversa or any combination of modes like wideband Opus/Codec2/FreeDV/SSB > etc.). > > The repeater can be connected to a VOIP server using the low latency > Mumble voice protocol (known especially for high-performance gaming). So it > is possible now to connect multiple repeaters together by putting them on > the same VOIP channel (this can be controlled via telnet as well, although > it's stil work in progress). They operate in full duplex mode, so a VOIP > user can talk at the same time as a radio user and the two audio streams > will be mixed together and broadcast. The FreeDV/Codec2 radio frames are > transcoded to Opus at very high bitrates (~48 kbit/s) for VOIP transport. > This may cause some small delays. > > I haven't really had time to test the cross-mode repeater so could use > some help there from interested parties. > > [1] http://qradiolink.org > > Cheers, > Adrian > > > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >
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