Viavi SmartClass Fiber OLTS-85 User Manual page 49

OLTS-85
Displaying modulated signals
The OLTS-85 automatically detects the modulation frequency of
light signals modulated at the fixed frequencies of 270 Hz,
1 kHz, and 2 kHz. The detected frequency is shown in the lower
right display pane of the Powermeter application.
Changing the power display mode
√ The instrument is in Powermeter mode.
1. Press the [A] key.
2. To toggle between the display modes, tap the
[dB] button.
– or –
To toggle between the display modes, tap the power level in
Powermeter mode.
Displaying relative power level
The actual measured power level relative to a reference value is
displayed in relative power display mode. The reference value
can be set by defining the actual power level as the reference
value or can be edited manually.
To set the reference level:
√ The Powermeter screen is displayed.
1. Press the [A] key.
The menu opens:
2. Tap the [Store ABS->REF]
The actual power level is set as the new reference level. The
reference level is displayed underneath the wavelength.
Reference power level display mode is activated.
Note: The reference level is stored for each wavelength and is
saved even when the power is off.
6 P
OWERMETER
P
OWERMETER MEASUREMENT
[dBm/Watt]
button to store the reference level.
O
PERATION
or
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