The E8000 from Quartzlock is a Time and Frequency Standard with Frequency 10 to 100 MHz, Stability over Temperature 0.1 ppb, <0.1 ppb, Output Power 9 to 10 dBm, Phase Noise -158 to -100 dBc/Hz, Short Term Stability 0.008 to 0.02 ppb. Tags: Rack Mount, Time & Frequency Standard. More details for E8000 can be seen below.