Anritsu MS9740B - Page 187

5.6 Measuring Laser Diode Modules
5-37
5
Measurement Functions
Note:
The center wavelength on the screen becomes the detection
wavelength if the wavelength is not detected in the range of level
set at Threshold Cut Level.
Figure 5.6.1-3 Measurement Method for Wavelength
Level
Detection Type: Detection method for signal level
Point: Point level for Signal wavelength
ΣPower: Detects Integrated level for Signal Span
wavelength range
Signal Span can be set in the range from 0.01 to 50.00.
Signal Level: Calculation method of signal level (See below.)
[Signal – Noise]: Measurement Level* – Noise Level
[Signal]: Measurement Level*
Figure 5.6.1-4 Measurement Method for Level
At Peak
Cut level
Signal Wl:
Peak wavelength
At Threshold
Signal Wl:
Center wavelength of
threshold level
Threshold level
At Point
Signal Span
Level*:
Level at Signal
Wl point
At
Σ
Power
Level*:
Integral level
in range of
Signal Span
Signal Wl
Signal Wl