23
Common Functions in OTDR Test Modes
Live Fiber Detection
To prevent service disruption on live PONs, FlexScan performs a Live
Fiber check prior to every OTDR test. If a live ber is detected, FS300
displays a warning screen
A
and does not allow testing.
Launch Quality Check
An optional launch quality check enables users to detect dirty, damaged,
poorly seated, or mismatched (UPC to APC) connectors.
To perform the launch quality check:
1. With the Launch Quality Check option
B
enabled in the OTDR or
General Settings screen, initiate an OTDR test.
2. The FlexScan will assess the loss and reectance at the OTDR’s
connection to the launch cord (ber ring) or ber under test.
3. If excess loss or reectance is detected, the OTDR displays the
‘Launch Quality is Poor’ warning screen
C
. From this screen the
user may chose to perform one of the following:
– Cancel a test by touching either Cancel
D
or Back
E
.
– Clean connectors, then repeat the launch quality check by
touching Re-check
F
.
– Continue testing without checking and cleaning the connection by
pressing Continue
G
.
Note: Testing a ber with poor launch quality may produce poor test results.
A
C
ED
G
F
B
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