Exfo PM-1600 High-Speed Power Meter Manual do Utilizador Página 111

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High-Speed Power Meter 101
11 Troubleshooting
Problem Probable Cause Recommended Action
------- displayed as power
value.
Power level is below
the minimum
detectable power.
Select Autorange if a manual
range is selected, or choose a
lower manual range.
+++++++ displayed as
power value.
Power level is above
the maximum
detectable power
(saturation).
Select Autorange if a manual
range is selected, or choose a
higher manual range.
Turn the source off.
!!!!!!! displayed as power
value.
Unstable or
modulated input
signal.
Select a manual range.
Questionable readings
displayed.
Dirty detector or
optical connectors.
Clean the detector and all optical
connections.
Improper wavelength
selected.
Switch to the correct wavelength
on all instruments being used.
Incorrect offset
nulling.
Perform an offset nulling with
protective cap installed.
Unstable optical
source.
Wait for source to stabilize.
Wrong correction
factor.
Reset the correction factor to
+0.000 dB or 1.0000 W/W
High-Speed Power Meter 101
11 Troubleshooting
Problem Probable Cause Recommended Action
------- displayed as power
value.
Power level is below
the minimum
detectable power.
Select Autorange if a manual
range is selected, or choose a
lower manual range.
+++++++ displayed as
power value.
Power level is above
the maximum
detectable power
(saturation).
Select Autorange if a manual
range is selected, or choose a
higher manual range.
Turn the source off.
!!!!!!! displayed as power
value.
Unstable or
modulated input
signal.
Select a manual range.
Questionable readings
displayed.
Dirty detector or
optical connectors.
Clean the detector and all optical
connections.
Improper wavelength
selected.
Switch to the correct wavelength
on all instruments being used.
Incorrect offset
nulling.
Perform an offset nulling with
protective cap installed.
Unstable optical
source.
Wait for source to stabilize.
Wrong correction
factor.
Reset the correction factor to
+0.000 dB or 1.0000 W/W
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