Front Panel Operation Op831 - OptoTest OP831 Instruction Manual

Front Panel Operation – OP831
Mode
Indicator
Power Reading
Wavelength
The wavelength button toggles through the available calibration wavelengths and
source selection depending on the mode of the instrument.
OPM Mode: The measurement wavelengths for the OP831 are 850nm, 1300nm,
1310nm, 1480nm, and 1550nm unless otherwise noted.
A-B, B-A Mode: In bidirectional measurement mode the wavelength button toggles the
source wavelength concurrently with the power meter calibration wavelength. For
OP831 with a single wavelength source there is no wavelength to be selected, for
dual wavelength implementations the wavelength selection is 850nm & 1300nm for
multimode, and 1310nm & 1550nm for single mode.
Ref Mode: no function.
Reference
For OPM, A-B, B-A modes: The Ref button switches the power meter into relative
measurement mode. At the same time it stores the current absolute power reading
at the current wavelength as the reference. The reference power is displayed above
the relative power reading (see illustration of Display). If the instrument is already in
relative measurement mode pressing the Ref button stores the current power level as
the new reference. For each wavelength and for each direction a reference reading can
be stored.
Wavelength
Indicator
Internal (ambient)
Temperature
8 of 15
OP831
Wavelength
Reference
Absolute Measurement
Mode Selection
(OPM, IL, Source)