The 501-25792 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 10 - 5000 MHz, Supply Voltage 15 V, Phase Noise -101 dBm/Hz@100 Hz to -83 dBm/Hz@10 Hz, Phase Noise 1 kHz -119 dBm/Hz, Phase Noise 10 kHz -138 dBm/Hz. Tags: Module with Connectors. More details for 501-25792 can be seen below.