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Performance Verification
Modulator Checks
RMS Jitter
D3186
2X attenuator
(only used for
1/32
0.25 V tests in
Clock
Data
Eye Pattern
Matrix)
015-0561-00
Figure 14: Setup for the RMS Jitter test
36
The following procedures check the RMS jitter and the polarity of the laser
waveform in the modulator circuit.
This test checks the RMS jitter on a histogram display of the leading edge of the
modulator output optical waveform.
Test Overview.
1. Set up the equipment as shown in Figure 14.
2. Set the BERT parameters.
3. Compensate the oscilloscope.
4. Set the oscilloscope measurement parameters.
5. Preview the waveform.
6. Take measurements.
Test Setup.
1. Connect the equipment as shown in Figure 14. A torque wrench is recom-
mended for securing the SMA connections to 7 to 10 lb-in (79 to 112 N-cm).
Laser out
Laser in
(FC/APC)
(FC/APC)
OI1125
Optical cable
SMA cable
174-4664-00
Modulator
Data in
Modulator out
(FC/APC)
Optical cable
174-4727-00
SMA cable
174-1341-00
OI1125 E/O Transmitter Instruction Manual
CSA8000/TDS8000 w/80C01
Optical input
(FC/PC)
Trigger
Direct In
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