
54
OLTS-85
7 L
ASER
O
PERATION
S
ELECTING
A
MODE
Auto-
λ
-Serial automatically toggles between all selected
wavelengths (see
), and, combined with a compatible
power meter (e.g. OLP-3x, OLP-85), the power meter
automatically sets up with correct wavelength settings. This
mode should be selected when low levels are expected on the
optical power meter or when the power meter doesn't support
Auto-
λ
-Multi.
Fig. 21 Auto-
λ
-Serial
Note:
Wavelengths cannot be reliably detected by a power
meter, if
• the receive level is too low,
• the wavelength encoding cannot be detected due to
interference, or
• you are measuring the absolute level of a system that
does not have wavelength encoding matching Viavi
power sources.
Selecting a mode
Tapping the
[
Mode selection
]
) toggles between
the modes as shown in the figure below. There are modes where
only a single wavelength can be selected (i.e. CW, 270 Hz, 1 kHz,
2 kHz). Furthermore, there are Auto
λ
modes where multiple
wavelengths can be selected (i.e. Auto
λ
, Auto-
λ
-Multi, Auto-
λ
-
Serial). When only one (a single) wavelength is selected, the
device is in Auto
λ
mode. When multiple wavelengths are
selected, you can toggle between Auto-
λ
-Multi and Auto-
λ
-
Serial mode.
Fig. 22 Mode selection
OLTS-85
λ
1
λ
2
λ
3
λ
4
λ
1
λ
2
. . .
Optical fiber
. . .
Time