Albalá Ingenieros GTI2000C01, Manual

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Albalá Ingenieros | Manual GTI2000C01
OK(B). Cyan. For both Automatic and Semiautomatic modes this color indicates
that the module is using the internal 10MHz reference and also that no reference
signal is present on the front panel input.
OK(F). Yellow. For both Automatic and Semiautomatic modes this color indicates
that the module is using the front panel reference signal and also that no valid
10MHz internal signal is present.
FAIL. Red. For both Automatic and Semiautomatic modes this color indicates that
neither of the reference signal sources are providing a valid signal. In Manual
mode this color indicates that the selected input does have a valid reference
signal present.
The following table displays the behavior of this LED as a function of the operating
mode, the input selected and the status of the reference inputs:
MODE
SELECTED
REFERENCE
INTERNAL REF.
STATUS
FRONT REF.
STATUS
STAT.
FULL AUTO
HALF AUTO
X FAIL FAIL FAIL. RED
INTERNAL OK OK OK (B). BLUE
FRONT OK OK OK (F). GREEN
INTERNAL OK FAIL OK (B). CYAN
FRONT OK FAIL FAIL. RED
INTERNAL FAIL OK FAIL. RED
FRONT FAIL OK OK (F). YELLOW
MANUAL
INTERNAL FAIL X FAIL. RED
INTERNAL OK X OK (B). BLUE
FRONT X FAIL FAIL. RED
FRONT X OK OK (F). GREEN
4.2. Functional description
The GTI2000C01 is a generator for 2048kHz synchronization signals as per ITU-T G.703.
It can operate while locked to the internal 10MHz reference signal of the mounting
frame in which it is installed whenever the frame has a GPS2000C01 GNSS module to
generate the 10MHz signal. The GTI2000C01 can also lock to 2048kHz synchronization
signals present at the front panel connector labelled IN on the silkscreening.
The GTI2000C01 has three operating modes, described as follows:
- Manual: the user specifies which reference input the 2048kHz oscillator will lock to
at all times. If no valid reference is available at the selected input then the oscillators
operates in free running mode.
- Full auto: the reference input to which the oscillator locks is whichever input is
present and has the higher priority. This means that in the case of a signal failure at
the higher priority input the oscillator switches and locks to the lower priority input.
It then switches back to the higher priority input if this becomes available again. If
neither of the two input reference signals are present, the oscillator operates in free
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