VeEX FX8 Series, Руководство пользователя

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FX8x Series User Manual Page 17 of 50
Selecting a wavelength for PM measurement
Select a wavelength by pressing the |Up| and |Down| buttons, then press the |Shift/Enter|
button to confirm the choice. The new wavelength then appears in the top right corner of the
display. For the previous wavelength to remain effective, select a wavelength and then press
the |F1| (EXIT) button .
If the fiber under test carries a signal with WaveID details, select
[ AUTO]
. Then, the device
(FX82, FX84, or FX85) determines the wavelength automatically.
If the [ AUTO] option for a signal without WaveID or modulated is selected, the λ
value goes blank, and the measurement results are NOT valid.
6.2.1 Setting Power Reference Level
To measure the fiber under test span loss, first set a reference level for each test wavelength.
In the PM1/PM2 mode, press the |F3| button (MORE) and then press |F2| (REF) .