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Optical Sampling Modules
d.
Close the Hist Setup dialog box.
e.
See the setup illustration in the following
fi
gure.
Figure 32: Setup used for heterodyne sweep
Test
Follow this procedure to test the 80C10, 80C10B, 80C10C, or 80C25GBE:
NOTE.
The values in System Properties dialog box do not update while the dialog
box is open. Close the dialog box and reopen it to get updated values.
1.
Set lasers to the DC starting point at (1550 nm):
a.
Adjust laser wavelengths to within 0.5 pm of each other by monitoring the
beat note directly on the real-time scope. (See Figure 31.)
b.
Adjust laser wavelengths until the beat frequency is <150 MHz, and
record the frequency f
DC
. This is the DC reference point.
2.
For Vertical scale:
a.
Set the vertical position to
0
.
b.
Record the mean and peak-to-peak value from the histogram statistics.
c.
Set vertical offset to the mean value recorded in the previous step.
d.
Adjust the vertical scale so that the peak-to-peak amplitude covers about
95% of the vertical range.
DSA8300 Performance Veri
fi
cation
233
Summary of Contents for 80A00
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