Harris Constellation, Installation & Maintenance

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Harris Corporation Constellation™
Signal Processing Section 11-29
FIELD-
REPLACEABLE
UNITS
Installing the HLM-155
1.
Check the part number of the HLM-155 to ensure that the correct unit is
being installed.
2.
Ensure that the 2 extractors are in the unlocked position.
3.
Carefully slide the HLM-155 into the designated slot in the shelf until the
unit plugs into the backplane.
4.
Use the 2 extractor tabs to lock the unit into place.
5.
Reconnect the cables.
•
Electrical: the top BNC connector is OUT.
•
Optical: the top SC connector is TX.
MHSB System
Use the Keypad command to take the switched unit out of lock status.
CONTROL > LOCK/IF LPBK > LOCK HLM, CLR
High Level 3xDS3/4xDS3 Mux (HLM-3xDS3/
HLM-4xDS3)
Figure 11-20:HLM-3xDS3/HLM-4xDS3 units front view
Extractor (2)
FAULT (red LED)
ON-LINE (green LED)
IN 1
IN 2
IN 3
OUT 1
OUT 2
OUT 3
HLM-3xDS3
HLM-4xDS3