The E8-X from Quartzlock is a Time and Frequency Standard with Frequency 10 to 100 MHz, Stability over Temperature 0.1 ppb, Output Power 9 to 10 dBm, Phase Noise -155 to -90 dBc/Hz, Short Term Stability 0.02 to 0.05 ppb. Tags: Rack Mount, Time & Frequency Standard. More details for E8-X can be seen below.