OLT-85/OLT-85P
47
7 P
OWERMETER
O
PERATION
S
ETTING
AND
SELECTING
WAVELENGTHS
Enabling Auto-
mode
Auto
is a special feature developed by Viavi that allows you to
identify wavelengths automatically (from OLS-XX, MTS-2k/4k/6k
OTDR CW-source). To do this, the signal is modulated at a
certain frequency (by a light source equipped with Auto
, such
as a Viavi OLS-85), which can be detected by a Viavi OLT-85.
In Auto
mode, the detected wavelength is included in the
table. As long as the detected wavelength is active, it cannot
be deleted from the
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
mode on/off:
I
The instrument is in
Powermeter
mode.
1.
Press the
[
A
]
key and tap the
[
More
]
button.
The menu opens:
2.
Tap the
[
Auto
button to switch Auto
mode on/off.
The checkmark is set or removed.
Displaying modulated signals
The OLT-85/OLT-85P 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 measurement display pane.
