EndRun Technologies Meridian II Frequency Standard

The EndRun Technologies Meridian II Frequency Standard is a GPS-synchronized frequency reference, featuring high-performance signal generation with unparalleled accuracy, stability, and spectral purity. The device features an accuracy of <10 nanosecond RMS to UTC and stability of TDEV <10 ns @ τ <105 secs, σy(τ) <6x10-14 @ τ=105 secs with 1 PPS timing. The EndRun Technologies Meridian II Frequency Standard provides a wide range of modules, including a digital output module, a low phase noise module, an analog time code output module, a cesium control module, and more.

Product Info

GPS receiver	L1 Band - 1575.42 MHz 12 Channels, C/A Code 15 dB minimum gain at receiver input Static and dynamic (shipboard) operating modes Timing Receiver Autonomous Integrity Monitoring (TRAIM) TNC connector (female) on rear panel, Zin = 50 Ω 5 VDC to antenna
1 PPS timing characteristics	Accuracy: <10 nanoseconds RMS to UTC(USNO) when locked Stability: TDEV <10 ns @ τ <105 secs, σy(τ) <6 x 10 - 14 @ τ=105 secs. Positive TTL pulse into 50Ω (Zout = 50Ω)
Time to lock	<5 minutes, typical (TCXO) <10 minutes, typical (OCXO/Rb) <30 minutes typical Cesium
Network I/O	Two rear-panel RJ-45 jacks 10/100/1000 Base-T Ethernet
Power	1U chassis: 90 - 264 VAC, 47 - 63 Hz, 1.0A Max. 2U chassis: 90 - 264 VAC, 47 - 63 Hz, 1.5A Max.
Weight	1U: <8 lb. (3.62 kg) 2U: <13 lb. (5.89 kg)
Compliance	CE, FCC, RoHS, WEEE

1 PPS timing output accurate to < 10 nanoseconds RMS to UTC(USNO)
Frequency accuracy better than 6x10-14 (at 100,000 seconds)
No frequency steps - guaranteed
MTBF up to 30 years
Dual-gigabit, IPv4/IPv6 Ethernet network ports
1PPS, time code output and RS-232 serial port
High-bandwidth NTP server (7500 packets per second)
User-friendly display & keypad with built-in help menus
Security-hardened network interface and protocols (SSH, HTTPS, SNMP V3)
Optional PTP/IEEE-1588 Grandmaster
Real-Time Ionospheric Corrections (RTIC) Option for the ultimate in long-term stability