Service Manual

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6802800U74-AN
Chapter 4: Hardware Installation
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 before 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 21: GPS Start-up Time
Initial Start Normal Start Soft restart
Typical Maximum Typical Maximum Typical Maximum
10 Minutes 30 Minutes 4 Minutes 10 Minutes 90 Sec-
onds
8 Minutes
NOTICE: If these start-up times are exceeded, then follow the procedures for GPS Site
Controller fault indications section.
4.8.4
Remote GPS Antenna/Receiver Connection
The remote GPS antenna connectors of DB15 type are placed on the junction panel, see Figure 65:
Remote GPS Receiver Connection on MTS LiTE Junction Panel on page 126 for MTS LiTE, Figure 66:
Remote GPS Receiver Connection on MTS 2 Junction Panel on page 126 for MTS 2 and Figure 67:
Remote GPS Receiver Connection on MTS 4 Junction Panel on page 126 for MTS 4.
NOTICE: Figure 66: Remote GPS Receiver Connection on MTS 2 Junction Panel on page 126
and Figure 67: Remote GPS Receiver Connection on MTS 4 Junction Panel on page 126
depicts the newer version of the MTS Junction Panel. There may be small differences in older
configurations.