Start this clock at night and let the clock receive the atomic signal automatically after midnight. Always place the unit away from interfering source such as TV set, computer, metal objects and electrical appliances.. View and Download Sharp SPC900 instruction manual online. Sharp Radio Controlled Atomic Thermo Clock Instruction Manual. SPC900 clock pdf manual download.
How Atomic Wall Clocks Work An atomic clock contains a small antenna and radio receiver that's set to pick up the long wave (60 kHz) signal of WWVB, NIST's radio transmitter. WWVB broadcasts nonstop, covers most of the continental United States and may even be picked up by atomic clocks in Alaska and Hawaii.. View and Download Sharp SPC1107 instructions & warranty online. Atomic Wall Clock. SPC1107 clock pdf manual download.