![Tektronix 80A00 Скачать руководство пользователя страница 250](http://html1.mh-extra.com/html/tektronix/80a00/80a00_technical-reference_1077946250.webp)
Optical Sampling Modules
7.
Verify the following settings on both Laser 1 and Laser 2:
a.
Instantaneous Laser linewidth:
<300 kHz
.
b.
Side-mode suppression ratio:
>50 dB
.
c.
Power stability is
≤
±0.025 dB
during the duration of sweep and over
wavelength range of sweep. This must be veri
fi
ed before continuing this
procedure. If the lasers do not meet this speci
fi
cation, apply correction
values as shown in the following substeps:
In performing steps 3 and 4, at each frequency point (including the DC
reference point) record the mean value from the histogram statistics:
m
i
The corrected normalized response values (dB) are calculated using
(also see the equation in step 6 b):
d.
Adjust the power of each laser so that the powers are equal and so that
average input to the module under test is
1.75 – 2 mW
each (this setting
results in a modulation amplitude of 7 - 8 mW).
8.
Push the
DEFAULT SETUP
button on the instrument front panel. Click
Yes in the dialog box that appears.
9.
Select
C1
for the waveform source (use the waveform selector button in the
lower left corner of the application display).
10.
In the Mode/Trigger dialog box, set the Trigger Source to TDR. Use the
default
200 kHz
setting.
11.
Set the Acq Mode to Sample in the instrument tool bar.
NOTE.
If the Scale, Position, and Channel Offset control boxes are not displayed
in the following step, click the Basic button in the lower left corner of the Vert
Setup dialog box.
12.
In the Vert Setup dialog box, use the default settings.
13.
In the Horiz Setup dialog box, set the Scale to 1.000 ns/div.
14.
In the Hist Setup dialog box, do the following steps:
a.
Select Main C1 as the Source.
b.
Check Enable Histogram.
c.
Select Vertical (limits are 0-100%).
232
DSA8300 Performance Veri
fi
cation
Содержание 80A00
Страница 2: ......
Страница 6: ......
Страница 16: ...Important safety information x DSA8300 Performance Verification ...
Страница 213: ...Electrical Sampling Modules Figure 21 Setup to measure Power in DSA8300 Performance Verification 195 ...