37
3-6-1 Measuring after Editing the CAL Value
Enter the amount of attenuation in the fixed optical attenuator as the CAL value.
Step
Key
Display
Description
1 Press
SETUP
while
pressing
ENTER.
and are displayed.
The relative value measurement
reference value blinks.
Changes to CAL
setting.
2 [UP]
or
[DOWN]
=> Previous value (initial value is
0.00 dB) =>
USR
=> OFF =>
previous value
Press repeatedly
to scroll through
options ([DOWN]
scrolls in reverse).
Select USR.
3
ENTER
is displayed to the lower
right of .
The relative value measurement
reference value blinks.
Changes to CAL
value user setting.
CAL can be
directly input.
4 [UP]
or
[DOWN]
The number in the relative value
measurement reference value
display changes. CAL setting
(-10.00 dB–25.00).
Set according to the amount of
attenuation in the fixed optical
attenuator.
Changes in 0.01 dB
steps.
Hold the key down to
change the value
rapidly.
5
ENTER
The mode display stops blinking.
The measured value is displayed.
display and absolute
value measurement mode.
Selects the CAL
value.
Exits CAL value
setting.
Hereafter, the level of the measured light input from the fixed optical
attenuator is read directly.
* When selecting the previous value and pressing ENTER, the
instrument returns to absolute value measurement mode without
setting a new correction value.
<Display Example>
CAL Function Selection Screen CAL Value Selection Screen
(Step 2) (Step 3)
▲
▼
CORR VAL
PWR SAVE
▲
▼
CORR VAL
CORR VAL
PWR SAVE
PWR SAVE
PWR SAVE
dB
CORR VAL
▲
▼
PWR SAVE
PWR SAVE
dB
CORR VAL
CORR VAL
▲
▼
CORR VAL
CORR VAL
CORR VAL
CORR VAL