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5-20
IM AQ6373-01EN
Center Frequency
The setting range is 250.0000 to 856.5000 THz.
If you press the COARSE key you can use the rotary knob or arrow keys to change the
numerical value in 0.1 THz steps. The value changes in 0.01 THz steps if you do not
press the COARSE key.
Start Frequency
The setting range is 1.0000 to 856.5000 THz.
Note that the frequency at which measurement starts is 250 THz or higher.
Stop Frequency
The setting range is 250.0000 to 999.9000 THz.
Note that the frequency at which measurement ends is 856.5 THz or lower.
Note
• When the start or stop frequency is set, one frequency becomes fixed, and this changes
the value of the sweep width. In addition, the center frequency value is also changed at the
same time.
• Changing the center frequency does not change the sweep width.
AUTO CENTER OFF/ON
This key sets whether the PEAK→CENTER soft key functions for each sweep.
When this key is set to ON, the peak is searched in the active trace waveform and set
as the center frequency automatically for each sweep.The active trace must be set to
WRITE. When ON is selected,
at the bottom of the screen is displayed in reverse
video.
One-Action Keys
You can set the center frequency with the one-action key in the same manner as for the
wavelength.
PEAK →CENTER
Sets the frequency of the waveform peak value of the active trace to the center
frequency. After execution, the center frequency set in the center frequency setting
screen is displayed. The center frequency can be changed after the setting is made
initially.
MEAN WL→CENTER
Sets the average of two frequencies falling below the threshold value (3 dB) from the
waveform peak of the active trace to the center frequency. The center frequency can be
changed after the setting is made initially.
VIEW→MEAS
This key is used to set the currently set ZOOM scale (ZOOM CENTER, ZOOM SPAN,
ZOOM START, ZOOM STOP) as the measurement scale (CENTER, START, STOP,
SPAN). When you press this key, the current waveform display scale is set as the
measurement scale for the next sweep.
5.5 Center Wavelength (Center Frequency) Settings