The following screenshot shows the
late afternoon DRM reception of the Deutsche Welle transmitter Sines/Portugal at
17.800MHz running the DREAM software.
A central heating radiator was used
as provisional antenna.
The band is quite calmy, but strong
fading is recognizable at the spectrum display. Nevertheless there are hardly changes
of the SNR (Signal-to-Noise Ratio).
Because the second IF value is 10KHz,
the input spectrum of the DRM signal is symmectrical around the 10KHz marking.
In case of DRM reception the DREAM software tunes automatically to the center frequency
of the DRM signal.
Every signal tuned by the DiRaBox
Control Panel software is displayed at the 10KHz marking position. In case of analogue
reception the cursor has to be moved to the 10KHz position.
Due to the 15KHz IF bandwidth the
passband range is +/- 7.5KHz around the 10KHz center frequency.