Gps Start Up; Initial Start; Warm Start; Soft Restart - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

GPS Start Up

GPS Start Up
The times given below are from applying power to the system until GPS LED is solid green illuminating.
GPS startup is the significant contributing factor in determining system start up times.

Initial Start

This is the first time an MTS is powered on or after the almanac or position information
has been erased from non volatile memory (NVM). The site needs to locate 4 satellites and
then train the reference oscillator from an unknown state.

Warm Start

The MTS has been previously powered up and the non volatile memory contains valid almanac and
position information and the reference oscillator was trained prior to starting the site. The times
quoted are for a power-off restart. A software restart will be slightly faster.

Soft Restart

This is an MTS restart, where power is maintained during the reset, for example, the remote MTS
restart after software upgrade. The GPS receiver will continue to track satellites during the MTS
restart, thus eliminating the 'search for satellites' phase of start-up.
Table 4-2
Typical
10 Minutes
4-46
GPS Start-up Time
Initial Start
Maximum
30 Minutes
If these start-up times are exceeded, then follow the procedures for GPS Site
Controller fault indications section.
Normal Start
Typical Maximum
4 Minutes 10 Minutes
Chapter 4: Hardware Installation
Soft restart
Typical Maximum
90 Seconds 8 Minutes
6802800U74-N September 2009