Manual

USER MANUAL10
Relative Power
To measure attenuation, you must:
1. Get a reference measurement
2. Get an attenuation measurement
Note: Lossisequaltothereference
measurementminustheattenuation
measurement.
Acquiring attenuation measurements (opticallinkloss) on optical components or ber
optic links (e.g., ber connectors, cable assemblies, installed ber optic links) is done by
measuring the relative power level (dB) at the far end of the link or device under test.
1. INSPECT, and if necessary,
CLEAN both the ends of
reference ber 1.
2. Connect the optical light
source (OLS) to the power
meter using reference ber 1.
3. Press to turn both the
power meter and light source
(OLS) ON.
4. Press
λ
to select
wavelength.
5. Press and hold
dB/dBm
on
the optical power meter.
REFashesbrieyonthepower
meterindicatethatthereference
levelissaved.
Note: DO NOT disconnectthe
reference berfromthelight
source(OLS).
6. Press STORE to save reading
onto the device (thesaved
numberwillashonceonthe
display).
Reference
Measurement
Inspect
P
P
Reference
Fiber 1
Inspect
Relative power level (attenuationmeasurement) is the amount of power lost (attenuated)
by the optical link being tested, measured in dB. The source of this power is typically a
handheld optical light source. This test determines whether the optical link is constructed
properly, either as a qualication test or when troubleshooting the network.
CHAPTER 2
Operation