Re: Spectrum analysis shows strange carrier

Hello Philipp,

On Mon, 20 Jul 2009 18:39:47 +0200, "dexter" zero-kelvin@gmx.de wrote:

We have a Toy-Spectrum-Analyser here, so i have measured the output of our BS-11 when initalized with -f 123

http://www.root.runningserver.com/pub/openbsc_spektralanalyse.png

Not sure what you are measuring on peak one and two, but channel 123 should be 959.6 MHz, this is most certainly the third peak. There might be small signals (e.g. from the oscillator of the BS-11) on other frequencies, but they should be much smaller than the main signal.

I don't know what the specification for a BTS allows as level for emitting on other frequencies, so I can't give you any numbers how strong those other signals can be.

Best regards, Dieter