Harris Constellation, Installation And Maintenance Manual

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Harris Corporation Constellation™
Service Channel D-5
SERVICE CHANNEL
If the pilot is not detected at the Master Terminal because of a break in the
outer loop, data is allowed to transmit and be received at the Master Terminal.
Note that the two Slave Terminals of the outer loop must have the External
Pilot option enabled to allow the pilots to propagate between them.
Figure D-3: Multiple loop system, a loop within a loop
Two Separate Loop Systems
Example A
Two Separate Loop Systems, Example A ( Figure D-4 ) shows two loop systems
connected together by two cables. The two loop systems operate independently
and identical as previously discussed. Note that both Slave Terminals in Loop
1 must have the External Pilots enabled.
Repeater
Master
Repeater
Slave
Repeater
Slave
Repeater
Slave
Pilot A
Pilot A
Pilot A
Pilot A
Pilot B
Pilot B
Pilot B
Pilot B
DATA
DATA
DATA
Direction A Direction B
Terminal
Master
Terminal
Slave
Terminal
Slave
Terminal
Slave
Data
VF
External
Pilots
VF
Data
VF
Data
Pilot A
Pilot A
DATA
Pilot A
Pilot A
DATA
A
A
A
A
A
B
A
B
A B
A B