Hirschmann MACH 4000 - Page 82

Time
82
3.2 PTP (IEEE 1588)
RM Web
Release 6.0 07/2010
Parameter Meaning Possible Values Default Setting
Time source Source selected for own clock. atomicClock
gps
terrestrialRadio
ptp
ntp
handset
other
internalOscillat
or
internalOsci
llator
UTC Offset [s] Current difference between the PTP
time scale (see below) and the UTC.
-2,147,483,648 to
2,147,483,647
34
UTC Offset valid Specifies whether value of UTC
offset is valid or not.
Yes, No No
Time Traceable The device gets the time from a
primary UTC reference, e.g. from an
NTP server.
Yes, No
Frequency
Traceable
The device gets the frequency from
a primary UTC reference, e.g. NTP
server, GPS.
Yes, No
PTP Time Scale The device uses the PTP time scale.
According to IEEE 1588, the PTP
time scale is the TAI atomic time
started on January 01, 1970. In
contrast to UTC, TAI does not use
leap seconds On January 01, 2010,
the difference between TAI and
UTC was +34 seconds.
Yes, No
Table 25: Properties of the Local Time