4-24
IM AQ6376-01EN
Explanation
Wavelength Sweep Width(Frequency / Wavenumber)
The ranges that can be set are as follows.
Wavelength sweep width:
0, and 0.5 to 1900.0 nm
Frequency sweep width:
0, and 0.01 to 112.00 THz
Wavenumber sweep width:
0, and 0.5 to 3726.0 cm
-1
If you press the COARSE key you can use the rotary knob or arrow keys to change the
numerical value in 1-2-5 steps. The value changes in 1 nm (0.1 THz/1 cm
-1
) steps if you
do not press the COARSE key.
Start Wavelength (Frequency / Wavenumber)
The ranges that can be set are as follows.
Start wavelength:
550.000 to 3400.000 nm
Start frequency:
32.0000 to 200.0000 THz
Start wavenumber:
1078.000 to 6667.000 cm
-1
You can change the values using the rotary or arrow keys.
The value changes in 1 nm (0.1 THz/1 cm
-1
) steps if you press the COARSE key.
The value changes in 0.1 nm (0.01 THz/0.1 cm
-1
) steps if you do not press the COARSE
key.
Stop Wavelength (Frequency / Wavenumber)
The ranges that can be set are as follows.
Stop wavelength:
1500.000 to 4350.000 nm
Stop frequency:
88.0000 to 256.0000 THz
Stop wavenumber:
2941.000 to 8530.000 cm
-1
You can change the values using the rotary or arrow keys.
The value changes in 1 nm (0.1 THz/1 cm
-1
) steps if you press the COARSE key.
The value changes in 0.1 nm (0.01 THz/0.1 cm
-1
) steps if you do not press the COARSE
key.
Note
• Setting the sweep width changes the start wavelength and stop wavelength. The center
wavelength/frequency does not change.
• Changing the center wavelength changes the start wavelength and stop wavelength. The
sweep width does not change. When the start or stop wavelength is set, one wavelength
becomes fixed, and this changes the value of the sweep width. In addition, the center
wavelength value is also changed at the same time.
• The above is the same for Frequency and Wavenumber mode.
One-Action Keys
This is the general name for a key that uses data from the active trace waveform (the
currently displayed waveform) to set measurement conditions.
Setting conditions requires that a waveform is displayed for the active trace.
Δλ→SPAN
Sets the sweep width as six times the spectrum width (threshold 20 dB ) of the active
trace measurement waveform with the RMS method.
MKR L1-L2 →SPAN
Sets spacing between line markers 1 and 2 for sweep width.
The setting range is 0.5 to 1900 nm (in 0.1 nm steps).
4.6 Sweep Width Settings