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6688 Standalone Frequency Standard 6689 Rubidium Frequency Standard Distribution amplifiers for 5×10 MHz and 1×5 MHz outputs as standard Optional 10×10 MHz outputs 0.001 ppm aging in 10 years (Rubidium) Ideal for telecommunication test systems and calibration laboratories

GPS-disciplined Rubidium clock for near-Cesium stability OCXO option (Model GPS-12) Internal battery option for transportation and mains-free field use Two switchable 1.544 MHz (T1) or 2.048 MHz (E1) front-panel outputs 1-pps front-panel output 1, 5 & 10 MHz outputs Optional -48 VDC operation Use of both GLONASS and GPS gives better signal coverage (GPS-12RG)