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:

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.

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.

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