I have 20 modules of the SAT92 series with the audio at 6,50 MHz
but after Astra changed the sound carriers to 7,02 & 7,20 MHz, the modules stopped working.
How do I switch the modules to the new sound carrier?
We can provide you with all the information you need to change the monaural audio subcarrier frequency.
In some satellite TV channels (Eurosport is the typical example), the monaural 6.50 MHz audio subcarrier has been suppressed.
In order to be able to receive the sound in the subcarrier located at 7.xx MHz in the SAT92 Televes units, you need to change the quartz crystal and the filter.
The crystal changes depending on the audio subcarrier frequency that is to be received.
To calculate the quartz crystal frequency, just add 10.700 to the audio subcarrier frequency you want to receive.
Carefully follow the diagram below to change this, making sure to place the components in exactly the same position as the previous ones.