Maintenance Guide Part 1

NeTIS MAINTENANCE GUIDE – Version 1.1 15/139

2g 'REF’ Presence of a synchronisation by link (communications board)

2f 'GPS’ This indicator has different flashing frequencies,

State 1: On 100ms / Off 100 ms No GPS module or defective GPS module

State 2: On 100ms / Off 900 ms GPS module OK / Satellite acquisition in

progress

State 3: On 100ms / Off 5 s Module GPS OK / Antenna fault

State 4: On 1 s / Off 1 s GPS module OK / Satellites OK

State 5: On 2s / Off 2s GPS module OK / Satellites lost, synchronisation

maintained for 8 min 30 s before switching to the internal reference

The board's synchronisation source can be determined from the indicator states,

'LOC’ off whatever the state of the other indicators means synchronisation on the internal

reference

'LOC’ and 'REF’ on mean synchronisation on the link

'LOC’ on and 'REF’ off and 'GPS’ state4 or state5 means synchronisation on the GPS

The clock test connector is controlled by selector 4

Position 0: 8 KHz (used on G703)

Position 1: 64 KHz (used on G703)

Position 2: 10 MHz (internal reference clock)

Position 3: TETRA multiframe

Position 4: TETRA frame

Position 5: TETRA time slot

Position 6: 2,048 MHz (G703)

Position 7: TETRA symbols

Clock signal selector on test connector 3

GPS antenna connector

Opening for access to the clock frequency internal reference fine tuning potentiometer

for the base station

Keyboard and mouse connector (diagnosis mode only)

Reset push button - this push button is accessible using a pointed object. Launching

this command triggers a restart of the software which is indicated by a tone on the

restart

COM1 serial connector

RJ45 connector for LAN network

Video connector for local screen connection (diagnosis mode only)