The Operators Remote Control (ORC) unit lets the operator select between preset frequencies on one or more radio units. The frequencies are stored in the radios and it shows the current operating frequencies. By using the up and down buttons on the unit’s front panel, up to 30 preset channels can be recalled. Four different radios can be controlled at the same time, typically these are one main and one standby transmitter plus one main and one standby receiver, i.e. four radios operating at the same frequency.
A text string can be “attached” to each frequency, enabling a simple and rapid selection. A keyboard consisting of three push buttons: Scroll up, Scroll down, and Select enhances easy operation. The ORC unit is connected to the radio unit(s) by a RS-485 serial line.