Agilent Technologies 86142B User Manual page 76

N o t e
1 Connect the light source to the optical spectrum analyzer's front panel
2 Press Auto Meas. After the routine has finished, check that the display shows
3 Press Applications > Measurement Modes > Filter Mode > Res BW. Use
4 Press Take Sweep (Applications > Measurement Modes > Filter Mode > Take
If the file saved in filter mode is recalled into an instrument with firmware
revision B.04.02, a critical error occurs, indicating a grating positioning failure.
Restart the instrument to clear the error and then continue making
measurements.
Filter Mode
For Agilent 86141B only
In the filter or instrument mode, the analyzer acts as a fixed-tuned, variable
wavelength, variable bandwidth, bandpass filter. It filters the input light at a
specified wavelength. The filtered light is available at the front-panel mono-
chromator output connector. Adjust the analyzer's resolution bandwidth to
change the amount of filtering. (Any of the resolution bandwidths may be cho-
sen.) One application of the preselector mode is the filtering (that is, select-
ing) of one particular mode of a laser source.
When the preselector mode is entered, the sweep stops with the analyzer fix-
tuned at the center wavelength. (If a marker is on, the analyzer is fix-tuned at
the marker wavelength.) The last trace remains displayed to show the input
spectrum before the filtering. A marker shows the wavelength of the preselec-
tion. You can change the filtered output (preselection) wavelength by adjust-
ing the marker's position. If the input spectrum changes, a softkey, Take
Sweep, is provided for capturing a new sweep.
Preselecting a light source (for 86141B)
monochromator input connector.
the wavelength range of interest. Adjust if necessary.
the knob, step keys, or numeric keypad to enter the desired amount of
resolution bandwidth filtering.
Sweep) to update the display to show the results of the new resolution
bandwidth filtering.
Using the Instrument
Analyzer Operating Modes
2-35