Fluke MultiFiber Pro, Руководство пользователя

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MultiFiber Pro Optical Power Meter and Fiber Test Kits
Users Manual
24
Negative loss can be caused by the following:

The fiber ends were dirty when you set the reference.

The patch cord connected to the source was
disconnected after you set the reference.

There was a kink in a test cord when you set the
reference.

The connectors were not properly aligned when you set
the reference.

The meter and source were not set to the same
wavelengths when you set the reference or measured
loss.

The meter or source was much colder when you set the
reference.

You did not allow enough time for the source to warm
up before you set the reference.

You measured loss on a fiber that is shorter than the test
cord you used to set the reference.
If loss is negative, set the reference again then measure loss
again.
How to Identify Cables or Fibers
You can use the 2 kHz modulated signal from the source to
identify cables or fibers at patch panels. The meter shows
2 kHz on the display when it detects the modulated signal.
To use the 2 kHz mode to identify cables or fibers
 Caution
For correct measurements, connect only APC
connectors to the singlemode sources. Connect
only non-APC connectors to the multimode
source.
1 Connect the source to the far end of the cabling.
2 On the source, hold down

until the setup menu
shows. If SCAN ALL is OFF , press

to set it to ON .
Press
 
to put the cursor next to MODE , then press

to make 2 kHz show.
3 On the meter, press

to put the meter in power
measurement mode. You can also select loss
measurement mode, but the display is easier to read in
power measurement mode.
If necessary, press
 
to
set the meter to the same wavelength as the source.