48
OLTS-85
6 P
OWERMETER
O
PERATION
P
OWERMETER
MEASUREMENT
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
]
button.
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
λ
]
button to set or remove the checkmark.
The Auto
λ
mode is on/off.