The SW8 is a microprocessor controlled, synthesized, world band receiver with continuous coverage capability from 500 kHz through 30 MHz which includes the AM broadcast and shortwave bands. Reception also includes FM broadcast (87 - 108 MHz) and Aircraft (118-137 MHz). The SW8 offers excellent sensitivity, selectivity, dynamic range and features that permit easy tuning of desired stations. Conveniently located front panel controls allow for rapid operator programming and ease of use. The unit can be operated from either the supplied AC Adaptor or from six “D” cell batteries (not supplied) for portable operation. A low battery voltage indication is displayed when that condition exists. Three electronically switched IF filters are provided. The front panel liquid crystal display provides feedback of the current status of the receiver. The seven digit frequency display provides resolution to 100 Hz accuracy in the AM broadcast, Aircraft and Shortwave bands. Resolution to 20 kHz is displayed in the FM broadcast band mode. Backlighting of the display is selectable by a front panel button. To prolong battery life with internal battery operation, the backlighting automatically turns off after a short delay following a function change or retuning of the receiver. Reception modes include Lower/Upper Sideband (LSB), (USB), and AM in the Shortwave, AM broadcast and Aircraft bands. For the Shortwave and AM broadcast bands, a selectable synchronous detector (SYNC) allows for enhanced reception by eliminating or reducing distortion due to fading signals. During FM broadcast use, stereo reception is available through the use of headphones. Other built-in reception aids include selectable slow or fast AGC, RF attenuator for use in strong signal handling conditions and TONE control. Two independent, real time clocks provide a local and alternative time selection. Also provided is a two event timer. A programmable memory area allows for 70 indepen- dent receiver set up memories. These memories do not require battery backup and are thus unaffected by power interruptions. All parameters associated with a particular memory channel are stored including the frequency, mode, bandwidth, fast or slow AGC, RF attenuator and synchronous detector. These memory channels may be accessed manually or through a time scan with each channel monitored for a 5 second period.