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3-8
Using the Optical Spectrum Analyzer
The Amplitude Menus
The Amplitude Menus
The Amplitude menus are accessed using the front-panel
Amplitude
key or the
Measure menu Amplitude selection on the menu bar. If you wish to change
amplitude settings, the following functions and setup panels are available:
Linear scale
In linear scale, the graticule is scaled in linear units, proportional to the input
power. The bottom of the graticule line represents zero watts. The top of the
graticule represents the reference level. Therefore, with 10 graticule lines,
each division represents 10% of the input signal at the top of the screen.
Logarithmic scale
Logarithmic scales range from 0.01 to 20.00 decibels-per-division. The 10 dB-
per-division scale is the default setting.
Function See....
Reference Level “To change the reference level” on page 3-9
Scale/Division “To change the value of the vertical amplitude scale” on
page 3-9
Display Mode “To change the display mode between log and linear” on
page 3-10
Sensitivity “To change the sensitivity” on page 3-10
Peak to Reference Level “To set the reference level to the peak value” on page 3-11
Amplitude Setup.... “To change the default amplitude settings” on page 3-11
Note
Normally, the optical spectrum analyzer automatically selects the amplitude units
according to whether the scale is logarithmic (dBm) or linear (watts). See “To change the
default amplitude settings” on page 3-11.
book.book Page 8 Monday, January 31, 2000 10:34 AM