Table 1-3:
1PPS output accuracies
Oscillator Type
Accuracy to UTC
(1 sigma locked to GPS)
Holdover (constant temp. after 2weeks of GPS lock)
After 4 hours After 24 hours
Rubidium ±25 ns 0.2 μs 1μs
OCXO ±50 ns 1μs 25 μs
TCXO ±50 ns 12 μs 450 μs
1.3.5 10/100/1000 Ethernet Port (RJ45)
ETH0
Function: 10/100/1000 Base-T, auto-sensing LAN connection for NTP/SNTP and remote
management and configuration, monitoring, diagnostics and upgrade
Connector: RJ45, Network IEEE 802.3
1.3.6 10/100/1000 Ethernet Port (SFP)
ETH1
Function: 10/100/1000 (speed depends on connection) Base-T, auto-sensing LAN con-
nection for NTP/SNTP and remote management and configuration, monitoring, dia-
gnostics and upgrade
Connector: Ethernet via SFP
1.3.7 RS-232 Serial Port (Rear Panel)
Function: Accepts commands to locally configure the IP network parameters via CLI for ini-
tial unit configuration.
Connector: RJ45
Character structure: ASCII, 115200 baud, 1 start, 8 data, 1 stop, no parity
1.3.8 USB Serial Port (Front Panel)
Function: Accepts commands to locally configure the IP network parameters via CLI for ini-
tial unit configuration.
Connector: micro-B USB (requires installed driver; if your driver does not automatically
install, visit: https://www.ftdichip.com/Drivers/VCP.htm)
Character structure: ASCII, 115200 baud, 1 start, 8 data, 1 stop, no parity
1.3.9 Input Power
AC power source:
1.3 Interfaces
SecureSync 2400 Getting Started Guide Rev. 2 11
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