The METEOSAT software has been specifically tailored to the transmissions of meteorological satellites parked in geo-stationary orbit at 0.2 degrees East and transmitting on 1691.0 MHz. Transmissions are always at 240 rpm using an IOC of 288. In contrast to short-wave stations which use frequency modulation, satellite weather images are transmitted using amplitude modulation. For this purpose the decoder is fitted with a DSP AM demodulator with an integrated software FIR low-pass filter.

The software is started in automatic mode by clicking on the Auto button or on Drum speed for manual mode. In manual mode the correct display of the image is controlled using the Phase function in the Options menu.

The special items AM-Gain and AM-Offset are placed in the Demodulator menu. Centering of the signal deviation on the bar graph is controlled by adjusting AM-Offset. In addition maximum deviation is required on the bar graph. This is done by adjusting AM-Gain. It should be noted that these two adjustments are influenced by each other.

Meteosat reception requires a parabolic reflector and receiver. The AF output of the receiver may be fed directly into the decoder, which converts it into a weather image viewing station providing excellent image quality.

The decoder allows a continuous and smooth alignment of the image as it is being received from Options/Fine Speed. By using the Phase item in the Options menu the image can be shifted into the correct position. Flip Left-Right and Flip Top-Down will reverse the image or turn it upside down.