4-31
IM AQ6376-01EN
Mesurement
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App
Index
4.10 Sweep Speed Settings
Procedure
1.
Press
SETUP
. The soft key menu for sweep condition settings appears.
2.
Press the
SWEEP SPEED
soft key. Each time you press the soft key, the setting
toggles between 1x and 2x.
Explanation
SWEEP SPEED
Sets the sweep speed.
1x
This is the instrument's standard sweep speed. To meet the instrument's
specifications, set the sweep speed to this value. With the sweep speed set to
this value, the instrument can measure light sources ranging from line spectrum
(such as the DFB-LD) to broadband wavelength (such as LEDs) light sources.
2x
Select this value to set the sweep speed to approximately twice the speed of
the 1x value. Select this value when you are measuring light sources that have
comparatively gentle spectrum shape level changes, such as LED light sources.
Measurements using this value have the following characteristics.
• If you select this value when “UNCAL” is displayed, for waveforms that have
sharp spectrum shape changes, such as those produced by the DFB-LD,
the level and wavelength measurement accuracies may be lower than those
when you select 1x. First check the measurement spectrum, and then select
this value if appropriate.
• The noise level is approximately 2 dB higher than that when you select 1x.
Note
When you set the sweep speed to 2x,
is displayed in the measurement conditions
area.