www.vtiinstruments.com
EX1629 Web Page Operation 71
database of assigned IP addresses, preventing accidental assignment of the same IP address to
multiple instruments. Consult your company’s Information Technology department for assistance.
VXI-11 Device Discovery is also supported by the EX1629. This allows all EX1629s on a local
network to be found without knowledge of their MAC address or IP address with the use of a
broadcast message. The vtex1629_findinstr function can be used programmatically to find all
available EX1629 instruments on the LAN.
TIME CONFIGURATION
This entry page is used to change the time configuration of the EX1629. By default, the instrument
has no notion of “wall-clock” or calendar time. The instrument has no battery-backed clock or any
other mechanism to retain time between reboots and power-cycles. By default, the instrument’s
time and date at power-up are midnight, January 1, 1970 (the beginning of the “epoch”). The time
and date can be manually specified on the Time Configuration page (Figure 5-4). Manual
configuration will be necessary if the network environment is such that the instrument cannot
reach the Internet. Manual time entry is not affected by the Zone control and does not require an
instrument reboot to be activated. However, manually-specified time is volatile, and therefore
must be reentered upon an instrument reboot or power cycle. It is not, however, affected by the
Reset page.
FIGURE 5-4: EX1629 TIME CONFIGURATION WEB PAGE - MANUAL
Optionally, the EX1629 supports SNTP (Simple Network Time Protocol), allowing it to receive its
time from an SNTP server. The Zone control provides a pull-down selection in which the user’s
specific time zone is selected. SNTP or NTP (Network Time Protocol) servers are specified in the
Server configuration panel, by IP Address or hostname. An instrument reboot is then required to
activate the new selection.
NOTE Specifying SNTP or NTP servers by hostname requires that the instrument be configured for DNS,
either by DHCP or Static IP.
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