Joinwit JW3213 Series User Manual page 12

From the toolbar, select "Threshold Set", and right click the Threshold to
type or modify the threshold value.
Calibration
Choose "Calibration" tab, the user can perform user self-calibration
operation also can choose "Factory Reset" mode. For example, the
current optical power at 1310nm is -10dBm, type -10dBm in the text box
of input standard power, and click Calibration tab, then finished the
calibration operation at 1310nm wavelength.
Power ON/OFF
1.Power ON
Press
into the PON power meter function , the unit displays as shown in below
figure:
1 1
for about two seconds to make the unit power on，Enter