EXFO IQS-1700, User Manual, Page: 104 / 204

Troubleshooting
96
IQS-1700
Solving Common Problems
* * * * * * *
is
displayed as power
value.

Channel not
active.

Channel not
selected for
Min. / Max.
acquisition.

Click the
Active
button for
the appropriate channel in
the
Channel
tab of the
Settings
function tab.

Select the appropriate
channel in
Min./Max.
Channel Selection
of the
Instrument
function tab.
! ! ! ! ! ! !
is
displayed as power
value.
The signal is unstable
or has a modulated
input.
Select an appropriate manual
measurement range if
Autorange
mode is selected.
Questionable
readings displayed.
The detector or
optical connectors
are dirty.
Clean the detector and all optical
connections.
The wavelength
selection is improper.
Switch to the correct wavelength
on all instruments being used.
The offset nulling is
incorrect.
Perform an offset nulling with
protective cap installed.
The optical source is
unstable.
Wait for source to stabilize (at
least 60 minutes).
The correction factor
is incorrect.
Reset the correction factor to
0.000 dB or 1.000 W/W.
Problem Probable Cause Recommended Action