Character structure: ASCII, 9600 baud, 1 start, 8 data, 1 stop, no parity
1.10.4 RS-232 Serial Port (Rear Panel; NetClock 9483 Only)
Outputs: RS-232, ASCII time code data input/output; 1PPS output.
Connector: DB9F
Accuracy: ±100-1000 μs (format-dependent)
1.10.5 RS-485 Serial Port
Outputs: RS-485, and Alarm/Relay (NetClock 9483 only)
Signal Type and Connector: (1) RS-485 terminal block
Accuracy: ±100-1000 μs (format-dependent)
1.10.6 10/100 Ethernet Port
Function : 10/100 Base- T, auto- sensing LAN connection for NTP/SNTP and remote man
agement and configuration, monitoring, diagnostics and upgrade
Connector: RJ-45, Network IEEE 802.3
1.10.7 IRIG Output (NetClock 9483 Only)
Outputs: (1) IRIG Output
Signal Type and Connector: IRIG A, B, G, E, NASA 36, Amplitude Modulated (0V to
5V
P-P
into 50 Ω on BNC) or DC Level Shift (unmodulated), user selectable.
Accuracy: ±2 to 200 microseconds (IRIG Format-dependent)
1.10.8 Protocols Supported
NTP: NTP Version4 (Installed: Version 4.2.8p8). Provides MD5, Stratum1 through 15 (RFC
5905). Note that NTP Autokey is currently not supported, for more information, see
http://bugs.ntp.org/show_bug.cgi?id=3005.
NTP throughput: ETH0: 7000-7200 NTP requests per second; ETH1-ETH3 (NetClock 9483 only:
equipped with 1204- 06/Option16 Gigabit Ethernet Option Module) : 8800- 9000 NTP
requests per second. For additional information, please contact Spectracom.
Clients supported: The number of users supported depends on the class of network and the sub
net mask for the network. A gateway greatly increases the number of users.
TCP/IP application protocols for browser-based configuration and monitoring: HTTP, HTTPS
FTP/SFTP: For remote upload of system logs and (RFC 959)
Syslog: Provides remote log storage (RFCs 3164 and 5424)
SNMP: Supports v1, v2c, and v3
1.10 Specifications
CHAPTER 1 • NetClock User Reference Guide Rev. 16
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