FiberMASTER side
22
Step 2
Connect known good reference jumpers between the
light source and power
meter. In this example two jumpers are used in
conjunction with a coupler.
This configuration allows the jumpers to be connected
directly to a patch panel
when making measurements. A single jumper can also
be used as long as it is
not disconnected from the light source after the
calibration process.
The LCD will display the current power level at the
power meter input. Typical values for the 33-926 light
sources are -6 to -7dBm. Levels lower than this (ex -15dBm) indicate excessive loss in the
reference jumpers. New jumpers should be used.
Step 3
Press the ‘dB/Cal’ button to store the reference value.
The LCD will display ‘0.00dB’. The meter is now
measuring loss.
Repeated pressing of the ‘dB/ Cal’ button again will
change between the dBm power measurement mode
and dB loss measurement mode. Each time the meter
enters
the dB mode it stores the current power level as a new
reference level. Once the calibration value is set, do not
toggle out of the dB mode. Otherwise it will be
necessary to perform the calibration step again.
The meter does not store a separate reference value for each wavelength.
When changing wavelengths repeat the jumper reference procedure.
Step 4
Disconnect the two reference jumpers and connect to the cabling
under test. The meter will display the total loss of all components
between the two reference jumpers.
