NTP Stratum

Network Time Protocol (NTP) uses "Stratum" to describe the distance between a network device and an authoritative time source. Stratum 0 is the GPS Satellite itself. Stratum 1 NTP Time Servers reference GPS Satellites directly and are considered the most accurate, because there is no network delay. A Stratum 2 device receives its time from a Stratum 1 Time Server. Stratum 2 NTP Time Servers can still maintain accuracy within milliseconds of the authoritative time source.

ESE offers Stratum 1 NTP Time Servers, like the ES-104A, and Stratum 1 NTP Time Servers/Time Code Generators, like the ES-185U/NTP, that also generates SMPTE LTC, ESE, IRIG-B and other time codes. All Stratum 1 devices need a GPS antenna. If that poses a problem, Stratum 2 devices, like the ES-188, can reference an NTP Time Server through an Internet connection. The use of any of these devices allow you to synchronize your entire network, including Digital & Analog NTP Client (NTP-C) Time Displays, to an accurate time source.