7
YY
Press and hold to activate
Secondary function of a key
XX
Press and release to activate
Primary function of a key
Dual Function Keys
Power key
Provides two functions:
Press the key to turn the OPM4 on/off. The unit will turn off automatically five minutes •
after the last key press.
Press and hold the key to disable/enable the Auto Off feature. •
Auto power down will occur after 5 minutes of inactivity.
- to disable the Auto Off feature, press and hold the power key until “HELD P on”
appears.
- to enable the Auto Off feature, press and hold the power key until “HELD AOFF”
appears.
Wavelength/Backlight key
Provides two functions:
Press and hold to toggle the Backlight on or off. •
Press to cycle through the calibrated wavelengths •
A
.
Note: When the OPM4 is receiving a wavelength ID’d light, it automatically switches to
the ID wavelengths. WAVE ID indicator
B
appears on the display.
WAVE ID WAVE ID
BB
A A
A
-88.88
8888
nm
µW
-88.88 -88.88
8888 8888
dB dBm dB dBm
dB dBm
nm nm
µW µW
Single WAVE mode, or
Tri WAVE mode - second page
Dual WAVE mode, or
Tri WAVE mode - first page
dB/dBm/µW key
Provides two functions:
Press to toggle test readings between insertion loss in dB and power in dBm •
A
.
Press and hold to view power in µW •
B
.
WAVE ID
A
A
B
B
-88.88
8888
nm
µW
Hz
-88.88
8888
dB dBm
dB dBm
nm
µW
OPM4 Models
W
dB
dBm