Chell Q-Daq, Инструкция по установке и эксплуатации

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5.6 Timestamp
This page allows the user to edit the timestamp settings of the Q-Daq. This timestamp will allow the
user to get millisecond level accuracy timestamps on the data packets. If the timestamp is enabled it
will have an effect on the maximum transmission rate.
Figure 5.11, Timestamp
‘PTP synchronisation on’
checkbox This allows the user to select whether any timestamps that may be
added to the datastream are PTP synchronised or not. Please note this
will only work if there is a PTP grandmaster clock on the same network
as the Q-Daq.
‘Datastream timestamp’
dropbox The user can use this to select where the timestamp is positioned in the
datastream, either none which will turn the timestamp off, start of cycle
which will place a timestamp at the beginning of all the channels and
every channel which will read the timestamp for every channel. It should
be noted that the latter 2 options will reduce the maximum transmission
speed due to the increased bandwidth required .
‘get PC time’ This button allows the user to get the timestamp from the PC time of the
PC they are using. This can be used as a base time for the timestamps
if the user is not using PTP. In the first box it will show the timestamp
and in the second box it displays the timestamp converted date/time to
make it easier to understand. NOTE the user has to click apply to send
the timestamp to the Q-Daq
‘Apply’ This button will apply the settings chosen on this page.
‘Refresh’ This allows the user to refresh the displayed value of the last read
timestamp from the Q-Daq.
‘last read microDAQ unix time’ The top line shows the current time in the Q-Daq
Table 5.9, Timestamp