S
YSTEM
B
EHAVIOUR
8029HEPTA-V2/GPS GPS - NTP Time Server with LAN Interface - V08.00
21 / 130
hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
4
System Behaviour
This chapter describes the behaviour of the system in special operational phases and
conditions.
4.1
Boot Phase
The boot process of the Time Server 8029HEPTA/GPS starts after turning on the system or a
reset.
This phase can be recognized by the LCD-Display and activated LED test of the Status LEDs
in the front panel.
During the boot process the Module 8029HEPTA boots its LINUX operation system and is
therefore not available via LAN.
The end of the boot process is reached when the LCD-Display changes to the standard picture
and the LED test of the Status-LEDs in the front panel has been finished.
The boot process lasts approx. 30 seconds.
4.2
NTP Adjustment Process (NTP/Stratum/Accuracy)
NTP is a regulation process. After start of the NTP services, automatically processed during
booting, the Time Server 8029HEPTA/GPS requires approximately 5-10 minutes after
synchronization of the Sync Source (Status "SYNC") until NTP is set to the high accuracy of
the Sync Source (here Module 8024GPS) and reaches the optimized operation condition of
STRATUM = 1
and
ACCURACY = High
.
The decisive factors here are accuracy of the synchronization source and the appropriate
synchronization condition of the Sync Source.
4.3
Reset-(Default) Button
The Time Server 8029HEPTA/GPS can be reset by the Reset-(Default) Button behind the
front panel of the board. The Reset-(Default) Button is accessible with a thin object through
the small drilling in the front panel.
The button triggers different functions depending on how long it is pressed:
Duration
Function
< 1 sec.
No action
1 - 9 sec.
After releasing a system wide
hardware reset
is triggered
>= 10 sec.
After releasing a
FACTORY DEFAULT
followed by a
REBOOT
is
triggered after approx. 10 seconds
