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dexter zero-kelvin at gmx.deHello Dieter. > In the meantime I did check with my spectrum analyzer. There is > indeed a signal coming from the BS-11, even if nothing else is > connected to the BS-11 (no serial connection, no E1). The signal > starts to be emitted after the firmware download is complete. > > I could measure the signal at 942.4 MHz, the level is about -42 dBm > (cable connection from the spectrum analyzer to TRX0, low-quality > cable). The signal strength does not depend on the power amplifier > setting, I wonder where it comes from (some internal oscillator > working at that frequency ?). The signal is not very strong, so > it should not cause major trouble (besides disturbing a weak > signal which might be there from an "official" source if you > are close to the BS-11). > I think i can confirm that. This was measured during the BS11 startup: http://root.runningserver.com/pub/startup-phase.png For me the case is closed, think this behaviour is just normal. regards, Philipp