2-34
Using the Instrument
Analyzer Operating Modes
The data returned by the alignment is stored for both the extern al (9 µm) and
the internal (50 µm) path. With the data stored for both paths, the alignment
for the internal path is improved due to the increased resolution bandw idth of
the external path. Once the align is complete or if you select No Auto Al ign,
the instrument will be ready to detect data through the external path.
4After the routine has finished, check that the display shows the wavele ngth
range of interest of the external path. Adjust if necessary.
5Press Res BW. Use the knob, step keys, or numeric keyp ad to enter th e desired
amount of resolution bandwidth filtering.
The 9 µm optical path for filter mode uses the 0.04 nm resolution bandwidth.
The resolution bandwidths include 0.04 µm, 0.05 µm, 0.07 µm, 0.1µm, 0.2 µm,
0.3 µm, 0.5 µm, 1 µm, 2 µm, 5 µm, and 10 µm.
6Press Take Sweep to update the display to show the results of the new
resolution bandwidth filtering.
The light is output from the optical spectrum anal yzer ’s front panel monochro-
mator output connector. This light is filtered (by the resolution bandwidth)
and attenuated (by the monochromator loss) light that is input to the front
panel optical input connector.
7Press Optical Filter Marker Tune. Turn the front panel knob or pre ss the
step keys to tune the preselector to any displayed wavelength.
8Connect the monochromator output to an instrument.
9If the input light changes, or if you change the span of the optical spectrum
analyzer, reconnect the monochromator output to the photodetector input,
and press Take Sweep to update the displayed trace with valid waveform data.
10 Press Exit Filter Mode to return to normal optical spectrum analyzer
operation.
The filter mode Save/Recall function for the Agilent 86144B/86146B will work
only between these two models.