The output frequency is set by means of front-panel pushbuttons and an LED channel number display. After setting, the buttons lock-out to protect against an unwanted channel change should either of the buttons be pressed accidentally. The channel setting is automatically stored and is restored at power-up. The RF output level is approximately 74 dBµV, and a standard VHF-UHF 'loop-through' input is provided.
Input signal connection is by means of a SCART socket. An adapter allowing connection of RCA phono plugs is supplied with the unit.
The PROmod1 is supplied with a detailed instruction leaflet giving SCART connector details and advice on choosing a suitable output channel.