The OSA 3235B from Oscilloquartz is a Time and Frequency Standard with Frequency 0.1-50 MHz, 1 MHz / 5 MHz / 10 MHz, Phase Noise -150 to -90 dBc/Hz, DC Supply 20 to 60 V. Tags: Rack mount, Time & Frequency Standard. More details for OSA 3235B can be seen below.