EXFO FTB-3930 MultiTest - Manual (Page 84)

Troubleshooting
78 FTB-3930
Solving Common Problems
Unable to establish F
AS T ES T
communication.

Remote unit’s F
AS T ES T
port is in use.

Remote unit is not
compatible.

Selected port on master
unit differs from actual
port to which fiber is
connected.

Compatibility set to
FOT-930 / FTB-3930
but remote unit is not
an FOT-930 or
FTB-3930.

Wait until F
AS T ES T
completes, turn source
and ORL meter off or exit
Probe mode (FOT-930).

Make sure remote unit
isan FOT-930, FTB-3930,
FOT-920 or FTB-3920.

Set the port (SM or MM)
correctlyin Setup (F
AS
T
ES
T
tab) on master unit.

Set the compatibility to
FOT-920 / FTB-3920 in
Setup (
F AS T ES T tab) on
master unit.
During F
AS
T
ES
T, you get a
message saying that
loopback reference was
not performed.
Loopback reference was
selected, but not performed
(or reference is outdated).
Perform a loopback reference
before F
AS
T
ES
T measurement.
ORL values are inaccurate
for short fibers at 1310 nm
during a F
AS
T
ES
T.
— Measure ORL manually.
Unable to communicate
with an FOT-920 using the
talk set.
Talk sets of the FOT-920 and
FOT-930/FTB-3930 are not
compatible.
Use text messaging instead.
Unable to establish
connection with
compatible talk set.
Probe mode is activated on
remote unit(FOT-930 only).
Deactivate Probe mode.
Problem Possible Cause Solution