RFL Electronics GARD 8000 - Figure 11-16. Manual Loopback

Tests and Diagnostics
GARD 8000 SYS RFL Electronics
February 14, 2011 11-31 973.334.3100
Remote Loop-Back:
The remote loop-back function directs the received data back out the Fiber Optic interface module to
the remote GARD 8000 system. The local transmit data is interrupted. The received data is passed
through to the GARD 8000 system. See figure 11-16.
Figure 11-16. Manual Loopback
Each loop-back mode has an enable disable button associated with it. By clicking on the button the
user can enable different types of loop-back tests. When a test is disabled the assigned button is green,
when a test is enabled the button will be red. The test will not start until the execute button is selected.
There is a “Loop Back Status” indicator that will turn red and display “ACTIVE” if any of the loop-
back tests are currently being run or will be green and display “Disabled” if all loop-back modes are
disabled.
Exit Loop-back:
To exit a loop-back test,
 Click on the active loop-back test button.
 The button will change from red and “Active” to green and “Disabled” and hit
“Execute”.
 The module will remain in loop-back until the execute button is pressed.
 The “Loop-back” status will change from red and Active to green and Disabled.
 Any system settings that were changed during testing must be returned to normal
operating before returning the equipment to service.
 The minor alarm, TX Activity and RX Activity indicators will be green.
 Reset error counters.
GARD 8000
Rx Data
TX Data
TX Data
Rx Data
Fiber I/O
Remote
Terminal