3-10
Using the Optical Spectrum Analyzer
The Amplitude Menus
To change the display mode between log and linear
1
Press the front-panel
Amplitude
key.
2
Press the
Display Mode
softkey to toggle between Log and Linear data display.
To change the sensitivity
1
Press the front-panel
Amplitude
key.
2
Press the
Sensitivity
softkey to toggle between Auto and Manual modes.
3
Use the knob, step keys or numeric entry pad to enter the desired value.
This key toggles the sensitivity between automatic and manual. The sensitivity
setting indicates the smallest signal amplitude that will be displayed across
the current wavelength range. Increasing sensitivity slows the sweep speed.
An increase in sensitivity may also require a narrower video bandwidth, which
will slow the sweep speed.
Normally, the optical spectrum analyzer selects the greatest sensitivity possi-
ble that does not require amplification changes during the sweep. If you man-
ually increase the sensitivity level, the sweep pauses to allow this change in
gain.
Automatic mode
When in automatic mode, the analyzer selects the greatest sensitivity possible
that does not require amplification changes during the sweep.
Manual mode
When sensitivity is increased manually, the sweep pauses to allow this change
in gain.
Note
If both the left and right vertical scales are displayed, the scale/division of the active
trace is changed.
book.book Page 10 Monday, January 31, 2000 10:34 AM
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