Harris Corporation Constellation™
Field-Replaceable Units 12-29
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 Mux (HLM-3XDS3)
Figure 12-17:HLM-3XDS3 unit front view
Removing the HLM-3XDS3
• In a MHSB configuration, start with
step 1
.
• In a nonprotected configuration, start with
step 2
.
Extractor (2)
FAULT (red LED)
ON-LINE (green LED)
IN 1
IN 2
IN 3
OUT 1
OUT 2
OUT 3
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