User manual

MC1000 - NTP Time Reference System - User Manual - Version 2.014
6 - Advanced setup
The Advanced Setup menu contains various settings, most of which
typical users should not need to access or adjust. Settings may be
adjusted following the procedure detailed in section 6.1 below, or
alternatively via the USB interface and supplied MC1000 Interface
software application (see section 7 for further details).
The table below details the options in the Advanced Setup menu:
Advanced Setup
Menu Option
Description Of Function
Set local time Allows local time to be adjusted. This should only
be adjusted if the MC1000 has no active remote
synchronisation reference. Note that before
adjusting this setting, the time zone must be
programmed (see section 4.1).
Set local date Allows local date to be adjusted. This should only
be adjusted if the MC1000 has no active remote
synchronisation reference. Note that before
adjusting this setting, the time zone must be
programmed (see section 4.1).
Leap second Enables the user to manually set a positive (1
second added) or negative (1 second removed)
leap second (see side bar). If programmed, the
leap second will occur once only at the end of the
following March, June, September or December
(which ever occurs rst) and then be erased.
Display contrast Allows adjustment of liquid crystal display
contrast to aid viewing at different angles.
LCD power save When enabled, switches off liquid crystal display
backlight if switches have not been active for 2
mins.
Serial number MC1000 serial number. (Read only)
MAC address Media Access Control address. (Read only)
Timing software Current timing software version. (Read only)
Linux software Current Linux software version. (Read only)
Hardware revision MC1000 build revision. (Read only)
SYNC 1 software SYNC 1 software version. (Read only)
SYNC 1 hardware SYNC 1 build revision. (Read only)
SYNC 2 software SYNC 2 software version. (Read only)
SYNC 2 hardware SYNC 2 build revision. (Read only)
Table 6.1 - Advanced Setup menu options
6.1 - Accessing advanced setup
The advanced setup conguration can be conrmed using the
procedure shown in the diagram on the following page.
What is a leap second?
The average rotational speed
of the earth is very slowly
decreasing and therefore the
average length of a solar day
is very slowly increasing.
To enable time counts based
on solar day observations to
be kept in alignment with
international time scales, an
extra second is occasionally
added to UTC at the end of
June or December.
Assuming the MC1000 is
connected to a leap second
capable antenna system,
leap seconds will be handled
automatically, with the leap
second setting (found in the
Advanced Setup menu) being
adjusted up to one month in
advance of the event.
See also... ‘What is UTC?’
(section 4).