IRT Communications DMM-4880, Instruction Manual

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DMM ‐ 4880 & DMX ‐ 4880 Instruction Book Revision 0
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Front Panel LEDs:
DMM ‐ 4880:
I/P 1, I/P 2, I/P 3 and I/P 4 LEDs correspond to STM
‐ 1 inputs 1, 2, 3 and 4 respectively. When a valid STM ‐ 1 input is
present corresponding LED will illuminate green.
The REF I/P LED illuminates green when there is a valid STM
‐ 4 input signal being used as a reference for the STM ‐ 4
output signal to synchronize with. Only valid for DMM ‐ 4880 fitted with optional STM ‐ 4 reference input port.
The ALARM LED does not illuminate as there is no Major Alarm associated with the DMM
‐ 4880.
DMX ‐ 4880:
O/P 1, O/P 2, O/P 3 and O/P 4 LEDs correspond to STM
‐ 1 outputs 1, 2, 3 and 4 respectively. When a valid STM ‐ 1
signal is present within the incoming STM ‐ 4 signal corresponding LED will illuminate green.
The ALARM LED illuminates RED when there is no valid STM
‐ 4 input present.
I/P 2 I/P 1
I/P 4 I/P 3
REF I/P
ALARM
O/P 2 O/P 1
O/P 4 O/P 3
ALARM
IRT
Communications
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