| 摘要 |
<p>A radio receiver comprises an RF tuner (10) on a computer card (11) having a frequency selector (19) for determining the current selected frequency. A programmed computer functions as a control system (100) controlling the tuner and a display screen (200) presents data and user selectable inputs to the user. An input peripheral device (101) enables the user to input data or information and commands to the control system. The control system causes a display (220) on the display screen (200) in real time of both digital and analogue indications of the current frequency being passed by the tuner (10); and provides a tuner frequency select control responsive to input of a frequency change command by the user to change the current selected frequency. Features include automatic changing of mode (AM, FM, etc.) when stepping or scanning through frequencies; a simulated analogue tuning dial (225); multiple selectable modes of scanning; slow and fast rates of frequency changes; and compensation for RF background noise from the computer and monitor via local antennas (38, 39).</p> |
