... Wenjing Zhen OCXO and high quality, precision timing GPS receiver type, frequency of monitoring the use of advanced GPS technology, the ... for a reference clock source. SpecificationsInterface:Antenna Input: 1 channel, N type, 1575.42MHz 2.048MHz signal output 1 channel, BNC, square ... Opt F: DCF77 Code Opt G: GLONASS reference source Opt N: SNTP protocol, MIB II Optional power supply: AC220V, DC48V, ...