[darkice] Re: Installation problem on a Raspberry Pi

  • From: Stefan Schäfer <dk7fc@xxxxxx>
  • To: darkice@xxxxxxxxxxxxx
  • Date: Wed, 24 Jun 2015 18:39:35 +0000

Hi,

Am 24.06.2015 14:00, schrieb Rafael Diniz:

What rf frontend are you using?
It is a homemade DC converter. The band of interest is the 630m amateur radio band, i.e. the range 472...479 kHz, nothing more. I'm using a 1.8432 MHz xtal divided by 4, i.e. about 461 kHz LO frequency. So the output is then at 11...18 kHz, inside the range of the soundcard, which is 0...24 kHz. This converter is consuming 30 mA at 12V. The whole system (RX + WLAN stick + Raspi) is consuming 250 mA at 12.7 V. I have to avoid any unnecessary power consumption, this is why i do not want the use the new Raspi B2. The soundcard can be found on ebay "SD-AUD20101".
The RTL dongles do not provide the necessary dynamic range. They may provide 50 dB but i want/need at least 80 dB!
In my system, without an antenna connected, the noise floor is at -110 dB and the band noise (antenna connected) in daytime is at -90 dB. Furthermore i need a stereo receiver (to be built, as soon as the darkice problem is solved) to build a "colour RDF system", as described here: http://df6nm.de/ColourDF/ColourDF.htm

are you using latest darkice code (not latest release)?
Not sure if i understand you correctly. I have removed all the darkice-1.0 components and then downloaded the darkice-1.2.tar.gz package, installed as suggested and using the new darkice.cfg file into /etc.

try to run icecast locally in RPi.
How is this done? Remember the Raspi is only accessable over SSH (putty or filezilla), no GUI, just the console.

There are some RPi USB stack improvements in linux 4.0.
OK so i will try it when the Raspi is on my desk the next time.

So, as a workarround, is there a chance to check the current data rate, so i can restart darkice is it falls below a certain value?
Checking the CPU load of darkice is not working because it is not a doubtless parameter.
Does someone have experience here?

Regards, Stefan


Other related posts:

  1. Home
  2. darkice
  3. Archive
  4. 06-2015