User`s guide

Power Tests Performance Tests
Agilent 81600B Tunable Laser Source Family, Fourth Edition 115
10 At the OSA, set the marker to the highest peak then select delta.
[Marker] → [Highest Peak] → [DELTA]
11 Use the [Modify] knob to move the second marker to the highest peak
of the displayed side modes.
12 Extrapolate the measurement result, the difference delta between the
two markers, to 1 nm bandwidth by adding 3 dB to the absolute value of
the measurement result.
13 Note the extrapolated value in the Test Record.
14 Increase the wavelength of the TLS by 10 nm, as specified in the Test
Record.
15 Repeat step 10 to step 14 for all wavelength settings listed in the Test
Record.
Extrapolation to an RBW of 1 nm: Although an RBW of 0.5 nm is used
for the measurement, this is extrapolated to an RBW of
1.0 nm by subtracting 3 dB from the absolute value since this factor of 2 in
the RBW gives 2 x power = 3 dB.
For example:
RBW=0.5 nm results in |SSE
0.5 nm
| = 55.5 dB measured.
RBW=1.0 nm extrapolates to |SSE
1nm
| = |SSE
0.5 nm
|-3dB
=55.5dB-3dB=52.5dB.
NOTE