Nokia Solutions and Networks T5DK1 사용자 설명서

68P64115A19

–

4

Mar 2003

1X SC 4812T-MC BTS Hardware Installation - Software Release R2.16.1.x

2-20

The BTS is able to receive timing information from the following
sources:

S

RF Global Positioning Satellite (RF GPS)

S

Remote GPS (RGPS)

S

Low Frequency Receiver (LFR)

S

High Stability Oscillator (HSO)

Customers have the option of installing either an RF GPS or Remote
GPS. Site characteristics determine the cabling to be installed (GPS,
LFR or HSO, if any).

Timing sources can be used independently. However, in typical
applications, sites are outfitted in pairs so that if a failure occurs in the
main source, a backup system will provide timing to keep the cell site in
operation.

Typical installations include:

S

RF GPS with LFR backup

S

Remote GPS with LFR backup

S

GPS with LFR or HSO backup

Each of these cabling installations are described in the following
sections.