JDS Uniphase cORL-A1 Operating Manual page 38

5 O
PERATION
To display the absolute power level in dBm:
✓ The relative level in dB is displayed and dBm is shown
in the menu.
⇒ Highlight dBm and press [MENU ENTER] .
The display will show the absolute level in dBm.
To display the absolute power level in Watts:
⇒ Highlight Watt and press [MENU ENTER].
The display will change to absolute mode when you
select Watts, regardless of the display mode that is
currently selected (relative or absolute). dBm will be
shown in the dB/dBm menu line.
⇒ Highlight dBm and press [MENU ENTER] if you wish
to display absolute level in dBm.
Setting the reference value
The actual measured power level relative to a reference
value is displayed in relative power display mode. The
reference value can be set by defining the actual power
level as the reference value. This setting can then be
edited manually.
To set the reference level:
✓ The device is in absolute power level display mode.
1. Press [MENU ENTER] to open the MAIN menu.
2. Select ABS → Ref and press [MENU ENTER] to store
the reference level.
The actual power level is set as the new reference
level. The reference level is displayed in the top display
bar. Reference power level display mode is activated.
Note: The reference level must be stored for each
wavelength separately and is saved even when
the power is off.
34 cORL-A1 JDSU