HR
X
-C-HB-1
C-B
AND
L
INK
H
ANDBOOK
11
2.3
Using the RF link module
2.3.1
Connecting the module
Connect the transmitter module to the power source, cross-site fibre optic cable and RF signal as
described in section 2.1. The RF input signal applied to the signal connector should be within the
maximum and minimum signal levels given in the datasheet.
2.3.2
Front panel indicators, plug-in modules
Each plug-in module has three front panel LEDs for indication of the state of the module. The following
table shows the operation of the front panel LEDs which are dependent on module type.
Colour
Plug-in
Transmitter
Plug-in
Receiver
LED1
GREEN
NORMAL
Flashing
GREEN
Programming
Programming
RED
Not used
Not used
No light
TX PSU fail
RX PSU fail
LED2
GREEN
NORMAL
Flashing
RED
fast
TX Alarm
Not used
Flashing
RED
slow
Not used
RX Alarm
RED
Not used
Not used
LED3
GREEN
I2C enabled
Flashing
GREEN
I2C active
AMBER
I2C disabled
2.3.3
LED indicator, purple modules
These modules are fitted with a single LED for indication of the state of the module.
2.3.4
Module summary alarm
Each module has a single summary alarm, which registers the status of the module. Activation of this
alarm registers an internal fault and the module should be replaced with a spare and returned to your
local
ViaLiteHD
representative. The alarm state should be accompanied by a fault status on one of the
front panel status LEDs.
The summary alarm is indicated by use of open drain logic. The alarm logic is OPEN when in an
ALARM state and SHORT when in a NORMAL (non-alarm) state. The module will remain in an ALARM
state until the ALARM condition is cleared, there is no latching.
Colour
Blue
link
Yellow
link
LED
GREEN
Normal
RED
Alarm
No Light
No power
LED1
LED2
LED3
