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801147.02
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Technische Daten / technical data / données techniques
Dimensions
44 x 170 x 85 (H x W x D [mm] without plug)
optionally with mounting brackets:
19” rack, 1HU x 28DU = 44 x 483 x 85 (H x W x D [mm] without plug)
Weight
approx. 1.35 kg
Ambient temperature
-5 to 50ºC, 10-90% relative humidity, without condensation
Operation
Telnet or SSH as well as MOBA-NMS (via LAN)
In addition, operation is also possible with SNMP.
Accuracy
GNSS (DCF input) to NTP server:
typical < +/- 0.5 ms
DCF 77 radio receiver to NTP server:
typical < +/- 5 ms
1)
NTP client to NTP server:
typical < +/- 0.5 ms
GNSS (DCF input) or NTP client to clock lines
typical < +/- 0.5 ms +
accuracy of the clock line
1)
If necessary, the DCF source must be corrected with an offset
(see menu: local time source
3 DCF/GPS source correcture)
Notice:
NTP reception (NTS as client or as server to external clients) can be influ-
enced by the network traffic load and network devices (Hub, Switch,
Router, Firewall...). If many clients request simultaneously, the typical ac-
curacy may not be reached. Condition for NTp accuracy: poll interval:
minimum 3, maximum 6.
Time keeping (internal)
After at least 24 hours of synchronization from the time source:
< +/- 0.1 sec. / day (< 1 ppm), measured during 24 h, at 20°C +/- 5°C.
In case of a loss of feed (based on internal RTC):
< 5 ppm, but with jitter of +/- 15 ms, measured over 24 h,
at 20°C +/- 5°C. (After 24 h, the deviation may increase further due to
quartz aging)
The RTC time is available for at least 5 days after the loss of feed (RTC
supported by SuperCap).
Time server
NTP V4
(fully V3 compatible), RFC 1305 (Port 123)
NTP authentication with MD5 key / autokey
SNTP
(UDP), RFC 2030 (Port 123)
TIME
(TCP/UDP), RFC 868 (Port 37)
DAYTIME
(TCP/UDP), RFC 867 (Port 13)
Max. number of NTP and SNTP client requests: > 250 requests / sec.
(e.g. client requests every 60 seconds
15000 clients)
NTP Mode
Server, Peer, Broadcast, Multicast
NTP slave clock lines:
1 line with up to 15 different time zone entries.
Communication through multicast:
-RFC 3376: Internet Group Management Protocol, Version 3
-RFC 1112: Host extensions for IP multicasting
-RFC 4601: Protocol Independent Multicast - Sparse Mode (PIM-SM)
-RFC 3973: Protocol Independent Multicast - Dense Mode (PIM-DM)
Time zones
Up to 80 predefined, 20 programmable entries (MOBA-NMS)
Network interface
10BaseT / 100BaseTX (IEEE 802.3)
Data transmission rate:
Auto-negotiation / manual
Connection:
RJ-45
Only shielded cables permitted.
IP Configuration
DHCP, Static IP, IPv4, IPv6
Network services
NTP
UDP, Port 123
see timeserver
SNTP
UDP, Port 123
see timeserver
Содержание NTS
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