Hello Philipp,
On Mon, 20 Jul 2009 20:19:16 CEST, "Dieter Spaar" spaar@mirider.augusta.de wrote:
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.
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).
Best regards, Dieter