Filter
Top Products
2-28
Making Measurements
Measuring Signal-to-Noise Ratios
To measure signal-to-noise
1 Press the front-panel Preset key.
2 Press List by WL or List by Power.
3 Press Appl’s and then S/N.
4 To select the wavelength reference for measuring the noise, do the
following steps:
a Press WL REF, and
• press AUTO to let the instrument interpolate the wavelength,
or
• press USER to select the last wavelength manually entered.
b If you chose USER, you can specify the wavelength by pressing USER
WL. Use the softkey to select the digit that requires editing. Use
the and softkeys to change the value.
c Press RETURN.
5 While the signal-to-noise measurements are displayed, you can press
PEAK anytime to select the signal with the highest power.