Anritsu MT9812B, Operation Manual, Page: 61 / 144

4-9
Operation
4
4.2 Light Source Operation
[When switchable light source is used.]
(1) Switching of the output optical frequency
Operations Remarks
Press the Prmtr key. Continue pressing the key until the unit display
turns to “THz” or “nm”.
Press the or key. The output optical frequency (or wavelength)
is switched by each pressing the key.
Press the Enter key. The pressing this key establishes the setting.
POINT
You can change the setting of the optical frequency (or
wavelength) without pressing the Enter key, but the
display continues to flicker. It is therefore recom-
mended that the setting be confirmed by pressing the
Enter key and the setting status be completed.
The conversion between the optical frequency and
wavelength is executed using the following formula.
λ
= c/f, C = 2.99792458
×
10 8 m/s (Light velocity in vacuum)
The execution result is displayed after rounding the
value at less than the displayed least digit. As a result,
the value obtained after the conversion process from
optical frequency to wavelength and the one from
wavelength to optical frequency may differ.
Example:
192.859 THz
→
1554.46 nm
1554.46 nm
→
192.860 THz