Introduction
QuantumX A03031_24_E00_01 HBM: public 29
It is possible to achieve accuracies of 1 ms or higher, depending on the utiliza
tion of the network and on whether or not a dedicated NTP master is being
used.
Modules located close together should be synchronized via IEEE1394b
FireWire.
If the synchronization source for a module is changed to NTP, the system must
be restarted once. The HBM catman®EASY software includes an NTP soft
ware package.
Parameter:
S IP address of the NTP server
S Threshold in µs below which the time deviation to NTP time is tolerated
Further information about NTP can be found at http://www.ntp.org
Synchronization via IRIG-B
IRIG-B is a standardized time coding.
To time-synchronize the QuantumX system, the digital or analog modulated
time signal is sent externally to any analog voltage input of the amplifier type
MX840B or MX440B (see Assignment, section 8.2.1).
The B127 format uses analog modulation. Connection is identical to that of a
10-V voltage sensor.
The other formats are BCD‐coded and must be connected analog to the sen
sor "Frequencies single-pole, without directional signal", see section 9.30.
The amplifiers can record IRIG‐B signals of type B000 to B007 and B120 to
B127. All modules connected via IEEE1394b FireWire are also automatically
synchronized. The coding includes the time, year and optionally the seconds of
the day.
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