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Acutime 2000 Synchronization Kit User Guide 5-15
5 System Operation
5.5 Using the Acutime 2000 in Mobile Applications
Although it is intended primarily for use in static applications, the
Acutime 2000 can also be used in mobile applications. The factory
default settings for the Acutime 2000 assume that the antenna is
going to be used in a static timing application. To use the Acutime
2000 in mobile applications, you must disable the Acutime’s self-
survey mechanism and ensure that a stored position does not exist in
the nonvolatile EEPROM.
To prepare the Acutime 2000 for mobile applications, complete the
following steps.
• Make sure that there is no stored position in the nonvolatile
EEPROM by using command packet 8E-45 with data byte 1
set to 6 (accurate position segment.)
This operation clears any stored position from the EEPROM.
• Disable the self-survey mechanism using command packet
8E-A9.
If not disabled, the self-survey mechanism will automatically
survey the antenna’s position and then set the receiver to
operate in a static, time-only mode.
• Set the desired position fix mode using command packet BB.
After these steps are completed, the Acutime 2000 is ready to operate
properly in mobile applications. While operating in a mobile
application, the Acutime 2000 can continue to output a PPS pulse as
well as timing packets.
!
Note – The accuracy of the PPS output pulse will be degraded by a
factor of about 3 when the unit is operated in a mobile application.