Appendix VI - Your television picture

The CURRAH MicroSpeech "mixes" sound into the UHF output of the Spectrum modulator, and consequently on some makes of TV set you may find some "patterning" where large areas of strong colour are being displayed. This is not due to a fault in your unit, but is an inevitable consequence of mixing sound into the UHF output; the technically-minded amongst you might be interested to know that the patterning is due to "sidebands" generated during the mixing process interfering with the colour information being transmitted to your television.