Measurement Display
After the device is powered up, the measurement display
is showed.
Absolute
mode
Fig. 8
Measurement display
REF
dB
PERM
1310nm
Acterna OLA-54/-55
Stored reference value
External power supply
When symbol is shown the OLA-54/-55 is
powered by the external AC adapter
Battery status
Shows actual battery status. If not shown
just the AC adapter is in use.
Selected attenuation
Display of absolute (dB) or relative (dBr)
attenuation value.
Power mode
• PERM: device remains powered on
• ECON: device powers off 20 min. after
last operation.
Wavelength
Selected wavelength is displayed here.
4 O
PERATION
Relative
mode
17