Using the Optical Spectrum Analyzer
The Amplitude Menus
Using the Amplitude functions
To change the reference level
1Press the
2Press the Reference Level softkey.
3Use the knob, step keys or numeric entry pad to enter the desired value.
The reference level value is the amplitude level shown at the reference level position. The reference level position is indicated on the display by a green line and the REF annotation on the display. The default position is one major graticule division from the top of the display. For the right vertical scale, the default position is midscreen. The reference level can be specified in dBm or watts.
Note
When using the step keys, the increment and decrement values are determined by the settings of the Scale/Division function. See “To change the value of the vertical amplitude scale” for more information.
Note
If both the left and right vertical scales are displayed, the reference level of the active trace is adjusted.
To change the value of the vertical amplitude scale
1Press the
2Press the Scale/Div softkey.
3Use the knob, step keys or numeric entry pad to enter the desired value.
Note
This function determines the amount the value increases or decreases when using the arrow keys to set the reference level. See “To change the reference level” for more information.