Viavi SmartClass Fiber OLTS-85 User Manual page 48

6 P O
OWERMETER PERATION
P
OWERMETER MEASUREMENT
48
To edit the limit for λ value:
√ The Edit λ Table menu is displayed.
1. Select the desired wavelength.
2. Press the [A] key.
3. Tap the [Edit Limit]
4. Type in the desired value.
5. Tap the [OK] button.
Enabling Auto λ mode
Auto λ is a special feature developed by Viavi that allows you to
identify wavelengths automatically. To do this, the signal is
modulated at a certain frequency (by a light source equipped
with Auto λ), which can be detected by a Viavi OLTS-85.
In Auto λ mode, the detected wavelength is included in the
λ table. As long as the detected wavelength is active, it cannot
be deleted from the λ table.
Wavelengths cannot be reliably detected if:
• the receive level is too low,
• wavelength encoding cannot be detected due to interference,
• you are measuring the absolute level of a system that does not
have wavelength encoding matching Viavi power sources.
To switch Auto λ mode on/off:
√ The instrument is in Powermeter mode.
1. Press the [A] key.
2. Tap the [More] button.
The menu opens:
3. Tap the [Auto button to set or remove the checkmark.
λ]
The Auto mode is on/off.
λ
button.
OLTS-85