Harris Corporation Constellation™
Signal Processing Section 11-27
FIELD-
REPLACEABLE
UNITS
Installing the HLM
1. Check the part number of the HLM 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 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.
Repeater System
• In a repeater system where the Modem units are not the same (that is,
one is 115072 and the other is 115430), ensure that the system
synchronization is set to SOURCE timed.
• In a loop system, when the HLM is at a master site, the HLM must be
set to SOURCE timed.
From the Keypad menu, select
CONFIGURATION > SYSTEM > SYNCHRONIZATION MX >
SOURCE
MHSB System
Use the Keypad command to take the switched unit out of lock status.
CONTROL > LOCK/IF LPBK > LOCK HLM, CLR
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