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Optical Sampling Modules
Module
Bandwidth setting
Bandwidth limit
80C10, 80C10B, 80C10C
30 GHz
>30 GHz
80C10, 80C10B, 80C10C,
80C25GBE
65 GHz
>60 GHz
80C10B, 80C10C
80 GHz
>75 GHz
You select the bandwidth settings for the module under test from the
Bandwidth control box in the Vert Setup dialog box.
b.
For Optical Reference Receivers the frequency response curves and
Bessel-Thompson tolerances are plotted on an electrical power scale
(20log) by convention. In this case, the response values given in 6 b) have
to be multiplied by a factor of 2.
8.
In the Vert Setup dialog box, select the Filter (see the module test record for
fi
lters to test for that module).
9.
Perform steps 1 through 6.
10.
Refer to the module test record and check that the optical sampling module
meets the limits listed for the applicable reference receiver
fi
lter.
11.
Repeat steps 9 through 11 for each of the
fi
lters available for the 80C10,
80C10B, or 80C10C module.
End of Procedure
Integrated Rise Time and Aberrations Check
This procedure checks the integrated rise time of an 80C06 Optical Sampling
Module and the aberrations of an 80C05, 80C06, 80C10, 80C10B, 80C10C,
80C15, or 80C25GBE Optical Sampling Module.
NOTE.
To optimize performance, make sure that all connections are clean and
secure and that all components of the system are in good condition. Optical
fi
ber
can gradually degrade the system performance as it is repeatedly
fl
exed over time.
Equipment required
Single-mode
fi
ber-optic cable, 2 m, FC to FC connectors (item 13)
Cable, coaxial, 1 m, male to male SMA connectors (item 16)
Variable optical attenuator, Tektronix OA5002 (item 21)
Optical impulser, Calmar FPL-01 (item 22)
Prerequisites
Before performing this procedure, be sure you have completed the
Dark level
and Vertical Equivalent Optical Noise
procedure. (See page 219,
and Vertical Equivalent Optical Noise
DSA8300 Performance Veri
fi
cation
235
Summary of Contents for 80A00
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