Waveform display signal generating appts

The present invention relates to an waveform display signal generating apparatus in which a result of calculation processing of digital data in a CPU is visualized and is converted into a television video signal so as to be able to display on a screen of a television receiver under production and aims to verify digital data processing on a screen of a television receiver under production and to simplify a verification system. A signal digitalized at an A/D converter is digitally signal processed at a data processing circuit. The data under digital signal processing is supplied to a CPU through a CPU interface circuit, is calculated for converting into a graph and then the converted data is stored in an RAM in a form of a bit-map data. The bit-map data is converted into an analog signal at a D/A converter, is further converted into a television video signal at a television encoder and then is supplied from a video signal output terminal to a video circuit of a television receiver under production. Thus, a graph calculated at the CPU is displayed on the screen of the television receiver.