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Measurements Applications
Measuring Signal-to-Noise Ratios
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.