Harris Constellation, Installation & Maintenance

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Harris Corporation Constellation™
SYSTEM from the CONFIGURATION Submenu 5-5
CONFIGURING THE
CONSTELLATION
RADIO
THRU TIMED
In general, the HLM is placed in THRU TIMED . The exceptions are explained in
the “SOURCE timed” section.
From the Keypad menu, select
CONFIGURATION > SYSTEM > SYNCHRONIZATION MX > THRU TIMED
SOURCE Timed
Select Source timed in the following cases.
•
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.
•
Terminal configuration.
From the Keypad menu, select
CONFIGURATION > SYSTEM > SYNCHRONIZATION MX > SOURCE
If the HLM is set for SOURCE timed, select enable local
off hook for the Service Channel.
CONFIGURATION > SERVICE CHANNEL > LOCAL OFF HOOK > ENABLE
STUFFING MODE (DS3 MODE)
This mode is not affected if a channel is using only DS3 signals in the system.
In an add-drop system, the M13 mode should be selected in general. When the
multiplexer is adding all 7 T2 signals into a T3 channel, both M13 and C-bit
parity (for OEM equipment) modes are available.
Table 5-3: Stuffing Mode
SYSTEM
Submenu
Selection Explanation
STUFFING MODE M13 The general mode.
C-BIT PARITY Do not use in add-drop modes.