LB-EO Rev.
3
5
Module status
The status of the module can be monitored in three ways.
1.
GYDA System Controller (optional).
2.
GPI at the rear of the sub-rack.
3.
LED’s at the front of the sub-rack.
Of these three, the GPI and the LED’s are mounted on the module itself, whereas the GYDA
System Controller is a separate module giving detailed information on the card status. The
functions of the GPI and the LED’s are described in sections 5.1 and 5.2. The GYDA
controller is described in a separate user manual.
5.1
GPI Alarm – Module status outputs
These outputs can be used for wiring up alarms for third party control systems. The GPI
outputs are open collector outputs, sinking to ground when an alarm is triggered. The GPI
connector is shown in figure below.
LB-EO module GPI pinning:
Figure 4: GPI output.
Signal Name Pin
#
Mode
Status
General error status for the module
Pin 1
Open Collector
LOS
Loss of Signal (open = signal detected)
Pin 2
Open Collector
LEVEL
Level too high (open = level ok)
Pin 3
Open Collector
H/L
High/low band (ground for 22kHz tone enable/high
band)
Pin 4
CMOS Input
H/V
Horizontal/vertical polarization (ground for vertical
polarisation)
Pin 5
CMOS Input
DATA
Data output
Pin 6
Open Collector
Ground 0 volt pin
Pin 8
0V.
Electrical Maximums for GPI outputs
Max current: 100 mA
Max voltage: 30 V
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