Design and fabrication of a pair of coupled oscillators based on the CEM3340 chip. The two units can be cross modulated in various ways using switches and potentiometers, allowing to produce various frequency modulation (FM) and Hard/Soft synchronisation schemes. Three waveform are available for each oscillator. The bottom oscillator can be processed through a voltage controlled wave folder stage in order do add interesting harmonics. This module has been produced in Nuclear Instrument Module (NIM) format.