User's Manual

545C Operations Manual

02/10/2012 Prerelease DCN 00001789-A

where: source = ON (sync with Master Station)

= GPS (sync using internal GPS)

= OFF (uses internal clock only)

If required, the MCC-545C’s internal date and time can be initialized by

entering the following commands:

DATE, mm/dd/yy

TIME, hh:mm{:ss}

The Master Station receives the correct date and time from either its Host

or an RTCM broadcast. The Master Station then periodically broadcasts this

date and time information to all Remotes for synchronizing their internal

clocks.

The date and time of day maintained in the MCC-520B Master Station is

transmitted to all Remote Stations between the times of 00:10:00 and

00:50:00 of each day, time keeping all units in a network on the same time

reference. If the time of day received at a Remote Station differs by more

than two minutes from the internal Remote clock, the Remote will set its

clock to the received time of day.

To properly manage time, each Master Station and Remote Station must

know how its own time zone relates to UTC and the system time. This

relationship is established by relating its time zone to known reference

points. UTC is always referenced to GMT; however, system time can be

referenced to any desired time zone.

The time zone offset is defined with the following command:

TIME ZONE, UTC offset, local time offset

Always set “UTC offset” to 0; the “local time offset” should be set to the

Remote Station’s time zone offset (+/- TZ) from the Master Station time

zone.

5.1.6 System Memory

The MCC-545C is designed to operate unattended in a variety of

environments where power may be applied continuously or intermittently.

The goal is for the unit to continue to operate without loss of messages,

data, or configuration, even if power is randomly turned on and off.