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| gnoutchd | GChriss: hey! :) | 00:01 |
|---|---|---|
| GChriss | hello. I promise I don't normally hang out on #timvideos but am here for a special occasion | 00:02 |
| GChriss | which I haven't announced yet, but that would be (at least) partial FLOSS support for the Cyprus FX3 chip | 00:03 |
| CarlFK | gnoutchd: sorry to post and run - did you find voctomix? | 00:05 |
| GChriss | https://github.com/myriadrf/RASDR/blob/master/DigiRED/firmware/src/usb_rx.zip <= contains a GPL'd derivative work of original firmware for Cyprus FX3 (at least for receive-data). there's a source-available but non-free script to convert ARM code into firmware for the device, still working on that part | 00:06 |
| tpb | Title: RASDR/usb_rx.zip at master · myriadrf/RASDR · GitHub (at github.com) | 00:06 |
| GChriss | so integration of a USB 3.0 chip into open hardware/software designs is looking up. cc: mithro | 00:07 |
| gnoutchd | Yep, I had heard of voctomix but hadn't looked at it. Fixing that now. :) | 00:08 |
| gnoutchd | CarlFK: ^ | 00:08 |
| gnoutchd | GChriss: cool! | 00:10 |
| GChriss | gnoutchd: also see https://www.crowdsupply.com/numato-lab/opsis (uses Cypress FX2 USB chip) | 00:11 |
| tpb | Title: Numato Opsis: FPGA-based open video platform | Crowd Supply (at www.crowdsupply.com) | 00:11 |
| mithro | GChriss: the FX3 is quite expensive | 00:14 |
| mithro | GChriss, the daisho core is a better option and someone linked a new ftdi chip | 00:14 |
| mithro | GChriss: any next board would definitely be USB 3.0 | 00:15 |
| * GChriss looks at ftdi for the first time | 00:19 | |
| GChriss | (the RASDR project uses the FX3 in lieu of a FPGA to control costs) | 00:20 |
| CarlFK | gnoutchd: https://github.com/voc/voctomix | 00:22 |
| tpb | Title: voc/voctomix · GitHub (at github.com) | 00:22 |
| CarlFK | I did see someone spin up a VM, install it and run some tests. and real soon now the lead dev will use it to record a talk. | 00:24 |
| CarlFK | he was going to try a week or so ago but did not attend the meeting (I think he got sick) so it seems someone thinks it is ready | 00:24 |
| gnoutchd | CarlFK: I was of the impression that gst-switch has already been used for linux.conf.au. At least that's the claim at <https://github.com/timvideos/streaming-system>. | 00:36 |
| tpb | Title: timvideos/streaming-system · GitHub (at github.com) | 00:36 |
| CarlFK | I was there. we hacked on it but it wasn't ready so we used DVswtich | 00:37 |
| CarlFK | where does that page say LCA? | 00:39 |
| CarlFK | ah "It has been used with conferences like PyCon US and Linux.conf.au" | 00:40 |
| CarlFK | yeah, the streaming server was used, but not gst-switch | 00:41 |
| gnoutchd | CarlFK: Drat. :P Well, thanks for the correction! | 00:41 |
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| G33KatWork | CarlFK: i don't know exactly what you are doing, but if you want a reference for high-speed communication with an FX3, definitely look at the bladeRF sources. they are using the FX3 | 08:37 |
| G33KatWork | i have one, but it seems the FX3 died due to static discharge or something :'( need to repair it sometime soon | 08:37 |
| G33KatWork | https://github.com/Nuand/bladeRF/tree/master/fx3_firmware | 08:38 |
| tpb | Title: bladeRF/fx3_firmware at master · Nuand/bladeRF · GitHub (at github.com) | 08:38 |
| G33KatWork | ah, meh. i mentioned the wrong guy... | 08:39 |
| G33KatWork | GChriss: ^ | 08:39 |
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| GChriss1 | G33KatWork: thank you! | 10:52 |
| GChriss1 | do the devices come within anything in the way of FCC certification? | 11:04 |
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| G33KatWork | GChriss: don't think so. i managed to get it past the german customs | 11:48 |
| G33KatWork | needed to pay import taxes, but i declared it as "test and measurement device for electromagnetic radiation" | 11:48 |
| G33KatWork | and didn't tell them that it was able to transmit | 11:48 |
| G33KatWork | worked :D | 11:48 |
| G33KatWork | i think in germany even that would be legal because such devices are not meant to be used by an end user | 11:49 |
| G33KatWork | i doubt that SDRs have an FCC certification because of all the harmonics they transmit. it is a broadband device and the user has to add bandpass filters to the signal path | 11:51 |
| GChriss | yes, sounds about right. in comparison the RASDR2 board (see myriadrf.org/projects/rasdr ) uses the same Lime Microsystems RF chip (separable module), no FPGA (cost control, not directly needed), and the FX3 chip w/ GPL'd firmware (+source-available firmware compile scripts) | 12:09 |
| GChriss | RASDR2 ( Society of Amateur Radio Astronomers) has Tx disabled (cost saving, FX3 Tx path non-populated on PCB, maybe no FX3 Tx firmware implementation) | 12:11 |
| GChriss | RASDR2 PCB design files are available under CC-BY as well | 12:17 |
| GChriss | it's not in production but all/most of the components are there | 12:19 |
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| G33KatWork | well, the tx power of the transceiver alone is not very high anyway. as long as you don't attach a beefy amplifier to these devices and look around in the spectrum if you may disturb other transmissions before you actually start to transmit, all is going to be fine | 12:31 |
| G33KatWork | at ccc camp this year i transmitted a signal as a ctf challenge on 2.4GHz with a hackrf jawbreaker @ 10dbm (10mW). i could receive the signal in an area of 50m or so with the rad1o-badge. almost nothing | 12:34 |
| G33KatWork | and there weren't any walls in the way. just tents :P | 12:34 |
| GChriss | high-gain antenna or no? | 12:38 |
| G33KatWork | puh, good question. wifi-router antenna :D | 12:39 |
| G33KatWork | on the tx-side | 12:39 |
| G33KatWork | rx was just an on-board antenna | 12:39 |
| G33KatWork | so not very good i assume | 12:39 |
| G33KatWork | also 2.5ghz instead of 2.4 | 12:40 |
| GChriss | yeah, I've had much better luck with ~9dB directional patch antennas | 12:41 |
| GChriss | at least when walls are involved | 12:41 |
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| CarlFK | mithro: anyone.. do you have a "who is Tim?" bio page? | 20:17 |
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| mithro | CarlFK: nope | 22:47 |
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