Measurements can be taken for six different wavelengths in the FiberMeter. These wavelengths are 850, 980, 1300, 1310, 1480, and
1550nm. All but 1480nm are traceable to the National Institute of Standards and Technology (NIST). The user may toggle through
these wavelengths by pressing .
F3
Power Units
Wavelengths
The FiberMeter is capable of displaying power readings in three
different units. The user may toggle through these units by
pressing :
dBm (ABS) - This is an absolute (ABS) power measurement. It
shows how much optical power is being received by the
photodetector in decibels referenced to a milliwatt (dBm).
dB (REL) - This is a relative (REL) power measurement. It shows
the amount of optical power being received by the
photodetector relative to the reference set by the Link Wizard.
REL mode is used to display PASS or FAIL, shows the user how
much the link is passing or failing by, and shows the amount of
F1
Store Data Points
Once the user has configured a fiber link using the Link Wizard, readings may be stored in the meter. Disconnect the patch cord from
the meter, and take the light source, with the reference patch cord still attached, to the other end of the fiber links you are testing. Set
the meter and the light source to the same wavelength. Once this is done, follow the steps below.
1) Press to begin storing a value.
2) You may be prompted to enter a label. This label is provided to give the set of fibers you are testing a descriptive name. For
example, there are three patch panels with 24 fibers in each to be tested. You could name the first one PP-A, the second one PP-B, and
the third one PP-C. There is no need to enter the fiber number (e.g. Fiber01, Fiber02, etc.) The FiberMeter automatically appends a
two-digit auto-incremented number to the end of the fiber label you enter. In our example, for Patch Panel A, the data points would
begin with PP-A00 and end with PP-A23. If you wish to have your data points start at 01, save dummy data for data point 00, then
delete it once it is downloaded into Reporter.
There are two scenarios where you will be prompted to enter a label name: A) if this is the very first data point for this link, or B)
if the auto-increment number reaches 00 again (i.e. if you have saved 100 data points for this label). For Scenario B, (SAVE) is
disabled, and you will not be allowed to save data points until the label has been changed. It is suggested to put the first digit of the set
of hundreds immediately after the fiber label (e.g. PP-A0 for data points PP-A000 to PP-A099, and PP-A1 for data points PPA-100
through PPA-199). If you are planning to save more than 100 data points for a single fiber label, this labeling scheme is highly
recommended for proper data sorting in Reporter software.
F2
F3
3-4
UNIT 3 CERTIFICATION METER
loss in the link.
This display will only appear in REL mode after the link wizard has been run and configured with a standard. The large number (-2.45)
shows the actual loss in the link, and PASS BY 1.24 tells the user if the link passes or fails according to the standard and by how much
in dB. In this example, 2.45 dB is being lost across the link, and has a PASS margin of 1.24 dB.
µW (ABS) - This is an absolute (ABS) power measurement. It shows the amount of optical power being received by the photodetector
in microwatts, or millionths of a watt.
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