YOKOGAWA AQ2180, User Manual

Page: 20 / 40

5.10 Switching measurement mode
There are three measurement units you can choose by
pressing the “dBm/dB/mW” key repeatedly, dB, dBm,mW.
AUTO-OFF
2 5.0 8
1 3 1 0 nm
AUTO-OFF
2 5.0 8
1 3 1 0 nm
-
5.11 Setting reference value
1. Press the “REF” key to display the stored reference for
the current wavelength and a sign of “REF” will be displayed on
the screen to indicate that it is a reference value. The
displayed value only lasts 1 second.
2. Press and hold the “REF” key over 2 seconds to store the
presently measured value as the new reference value for the
current wavelength. During the process the “REF” sign flashes
twice on the screen and buzzer sound is heard. Once the new
reference level is set, the AQ2180 switches to the dB
measurement mode. The displayed value only lasts 1 second.
Note
1. Long keypress for over 2 seconds, the unit will be
shifted to "dB" automatically.
2. When the input laser power is modulated laser source, it will
affect the setting of REF value. Please guarantee the input
laser source is CW laser when setting REF value.
value
AUTO-OFF
0 5.8 8
1 3 1 0
nm
AUTO-OFF
5.8 8
1 3 1 0 nm
AUTO-OFF
2 0.0 0 REF
1 3 1 0
-
nm
AUTO-OFF
270Hz
1kHz
2kHz
.8.8.8.8
REF
1888
-
nm
AUTO-OFF
270Hz
1kHz
2kHz
0.00
REF
1888 nm
short
keypress
15
630