GOES 16 woes continue…

GOES 16 woes continue...

Second attempt at receiving images from GOES 16 here, using raspberry pi running goestools. After my last attempt was foiled by an issue with the bias tee of my SDR that resulted in the LNA not being powered, I was hopeful that I would get an image this time. Firing up goestools, my viterbi error rate never went below 2000, indicating no signal. However when I connected the SDR to my laptop and ran CubicSDR, the waterfall showed a clear (perhaps weak) signal at the 1.68 GHz range when pointed at the satellite's approximate location:

Definetely something

https://i.redd.it/r6udbey8whb21.png

Which dissapeared when not pointed at GOES, ruling out interference

Despite not changing antenna positioning at all between running goestools and the waterfall, the latter clearly (I believe) showed some reception from GOES. My question is how is it possible to then not be getting a single packet or drop in vit rate? I don't see where there could be a fault in the hardware (in case it was my Pi I tried running goestools on a linux machine, no luck), and I find it hard to believe it's the software. Or was the signal just too weak? Thanks in advance for any ideas/help, this project is fascinating and frustrating at the same time!

submitted by /u/drwhoxenon
[link] [comments]

Comment on Using a LimeSDR / PlutoSDR to Transmit Digital Amateur Television with DATV Express by AD5NL

I was taking a look at that myself. I was able to get it transmitting with the dvb_s2 example on my Lime, but didn’t have a receiver handy (I don’t think you can use the Lime with both gr and sdrangel at the same time).

I’ve got a cheap chinese sat receiver in the garage somewhere I bought a couple years ago, been meaning to try modding it as you did in your video to receive DVB-S/S2.

btw good videos, very educational

Troubleshooting Help • Is there any way to run audio through DAP BEFORE Aux VFO???

I'm trying to run a voice inverted signal through the DAP then out the AUX VFO to VB Cable then to a Zello application. I can get this to work if it is the selected frequency and running through the default audio device selected in Windows but when I route it out the Aux VFO it is still scrambled. Is there any way to make DAP process the audio BEFORE it is routed out the Aux VFO????

Statistics: Posted by Fireman3351 — Sun Jan 20, 2019 4:35 am


RTL-SDR Discussion • SW Definitions

Shortwave definitions vary slightly between ITU regions between 1.6 to 1.8 MHz up to 30 MHz see https://en.wikipedia.org/wiki/Shortwave_radio

While TV channel 1 existed in the beginning, most TV Turner in the past 50 years tuned only between channel 2 to 13, and did not provide means for tuning to channel 1. WIth CATV and use of analogue and digital TV norms (meaning e.g. D2MAC and not todays DVB-x modulation) thigs became more complicated.

Until the 6 m was opened HAM SW receiver covered at best 160 m to 10 m, but never above 30 MHz (e.g. Drake or Heathkit, Yeasu, Kennwood ...).

Statistics: Posted by snn47 — Sun Jan 20, 2019 4:24 am


Automating Goestools on Pi?

I've been trying all night to get goesrecv and goesproc to run on my pi via crontab so i dont need to login via ssh and start it every time.....

no success so far...

has anyone setup their Pi to run goestools without having to execute the commands via ssh?

banging my head against a wall here ;)

i've tried this

@reboot /usr/bin/goesrecv -v -i 1 -c /home/pi/goesrecv.conf > /home/pi/goesrecvlog.txt

@reboot /usr/bin/goesproc -c ~/goesproc-goesr.conf -m packet --subscribe tcp://127.0.0.1:5004 > /home/pi/goesproclog.txt

and I can see goesproc in the running processes after rebooting, but goesrecv isnt there (a problem, obviously) and there's no output in either of the files.

can anyone point me in the right direction?

or does anyone automate goestools a different way?

submitted by /u/quartapound
[link] [comments]

troubleshooting goesrecv

hi, I built a setup according to this. After the first few seconds, my packet drops are consistently at 10-13. I've adjusted the antenna back and forth, up and down, and my vit doesn't get much better than what shows below. I've tweaked the gain and sample rate without any luck. Any advice? Thanks in advance!

Jan 19 23:52:18 raspberrypi goesrecv[1913]: Found Elonics E4000 tuner

Jan 19 23:52:19 raspberrypi goesrecv[1913]: Disabled direct sampling mode

Jan 19 23:52:19 raspberrypi goesrecv[1913]: [E4K] PLL not locked for 0 Hz!

Jan 19 23:52:19 raspberrypi goesrecv[1913]: Exact sample rate is: 2000000.052982 Hz

Jan 19 23:52:19 raspberrypi goesrecv[1913]: Allocating 15 zero-copy buffers

Jan 19 23:52:20 raspberrypi goesrecv[1913]: 2019-01-19T23:52:20Z [monitor] gain: 6.73, freq: -333.8, omega: 2.157, vit(avg): 944, rs(sum): 111, packets: 16, drops: 15

Jan 19 23:52:21 raspberrypi goesrecv[1913]: 2019-01-19T23:52:21Z [monitor] gain: 4.44, freq: -619.0, omega: 2.157, vit(avg): 868, rs(sum): 317, packets: 29, drops: 12

Jan 19 23:52:22 raspberrypi goesrecv[1913]: 2019-01-19T23:52:22Z [monitor] gain: 2.94, freq: -665.3, omega: 2.157, vit(avg): 237, rs(sum): 217, packets: 44, drops: 0

Jan 19 23:52:23 raspberrypi goesrecv[1913]: 2019-01-19T23:52:23Z [monitor] gain: 2.94, freq: -621.2, omega: 2.157, vit(avg): 241, rs(sum): 206, packets: 44, drops: 0

Jan 19 23:52:24 raspberrypi goesrecv[1913]: 2019-01-19T23:52:24Z [monitor] gain: 2.94, freq: -644.7, omega: 2.157, vit(avg): 239, rs(sum): 189, packets: 42, drops: 0

Jan 19 23:52:25 raspberrypi goesrecv[1913]: 2019-01-19T23:52:25Z [monitor] gain: 2.94, freq: -605.1, omega: 2.157, vit(avg): 236, rs(sum): 210, packets: 44, drops: 0

Jan 19 23:52:26 raspberrypi goesrecv[1913]: 2019-01-19T23:52:26Z [monitor] gain: 2.94, freq: -559.4, omega: 2.157, vit(avg): 328, rs(sum): 204, packets: 40, drops: 2

Jan 19 23:52:27 raspberrypi goesrecv[1913]: 2019-01-19T23:52:27Z [monitor] gain: 2.94, freq: -723.6, omega: 2.157, vit(avg): 347, rs(sum): 108, packets: 20, drops: 12

Jan 19 23:52:28 raspberrypi goesrecv[1913]: 2019-01-19T23:52:28Z [monitor] gain: 2.94, freq: -624.2, omega: 2.157, vit(avg): 497, rs(sum): 116, packets: 22, drops: 12

Jan 19 23:52:29 raspberrypi goesrecv[1913]: 2019-01-19T23:52:29Z [monitor] gain: 2.94, freq: -563.3, omega: 2.157, vit(avg): 402, rs(sum): 100, packets: 22, drops: 11

Jan 19 23:52:30 raspberrypi goesrecv[1913]: 2019-01-19T23:52:30Z [monitor] gain: 2.94, freq: -653.3, omega: 2.157, vit(avg): 430, rs(sum): 103, packets: 21, drops: 12

Jan 19 23:52:31 raspberrypi goesrecv[1913]: 2019-01-19T23:52:31Z [monitor] gain: 2.94, freq: -635.4, omega: 2.157, vit(avg): 406, rs(sum): 129, packets: 22, drops: 11

Jan 19 23:52:32 raspberrypi goesrecv[1913]: 2019-01-19T23:52:32Z [monitor] gain: 2.94, freq: -594.9, omega: 2.157, vit(avg): 387, rs(sum): 108, packets: 21, drops: 13

Jan 19 23:52:33 raspberrypi goesrecv[1913]: 2019-01-19T23:52:33Z [monitor] gain: 2.94, freq: -593.5, omega: 2.157, vit(avg): 366, rs(sum): 97, packets: 20, drops: 12

Jan 19 23:52:34 raspberrypi goesrecv[1913]: 2019-01-19T23:52:34Z [monitor] gain: 2.94, freq: -614.0, omega: 2.157, vit(avg): 427, rs(sum): 107, packets: 23, drops: 11

submitted by /u/JoshWithaQ
[link] [comments]

kent к «CTCSS детектор, шумоподавитель.»

начиная с какой версии Sdrsrsharp,на Виндовс 7 будет устанавливаться плагин CTCSS Decoder? У меня Стоит версия 1.0.0.1426 и на неё не получается поставить плагин CTCSS! А версии новее, не видят мой донгл 2832, который отображается как R820T. При установке следующих версий после 1426, отображается напротив Device - Е4000 и в строке device ничего нету! Как установить этот плагин на мою версию(1426), если это возможно? На более новые версии этот плагин смог установить, ноо они не видят мой донгл!

Comment on Using a LimeSDR / PlutoSDR to Transmit Digital Amateur Television with DATV Express by Corrosive of SignalsEverywhere

I was targeting Windows users in this one but I am working on how to do it with Raspberry pi and later in gnuradio.

There is a gr-dvbs block on GitHub that can be used to transmit in Linux with other SDR Hardware. it’s on my list of videos to make but that is becoming a very long list so I can’t say for sure when it will come out.

Comment on Using a LimeSDR / PlutoSDR to Transmit Digital Amateur Television with DATV Express by AD5NL

Unfortunately, the software only seems to work in Windows at the moment.

There is a version for Linux but it doesn’t seem to support anything but the Express proprietary hardware.

I tried running the Windows version in Wine and it didn’t work. =(

Powering Devices with Bias Tee power

Hi! Using a bias tee as a power injector seems straight forward. However, I can't seem to find an answer as to how to remove the injected power to operate a device.

For example: I am injecting power into a cable using a bias tee which feeds into this LNA. There are three ports on the LNA: RF in, RF out, and DC in. How do I get the injected power to the DC in port of the LNA?

Does it require using another bias tee connected in reverse??? Thank you!

submitted by /u/prototagonist
[link] [comments]
Перевод
Рубрики
Январь 2019
Пн Вт Ср Чт Пт Сб Вс
« Дек    
 123456
78910111213
14151617181920
21222324252627
28293031