Tektronix OI1125, Instruction Manual

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Performance Verification
OI1125 E/O Transmitter Instruction Manual
51
OI1125
D3186
CSA8000/TDS8000
External
Tunable Laser
Opt
Out
Trig
SMA cable
015-0561-00
Data
1/32
Clock
Trigger
Direct In
Modulator
Data in
SMA cable
174-1341-00
Optical cable
174-4727-00
Optical cable
174-4725-00
Laser in
(FC/APC)
Modulator out
(FC/APC)
Optical
input
(FC/PC)
Figure 18: Setup for the eye pattern test matrix
The following parameters are set up to measure the data for the first row in
Table 19 in the Test Record. As you progress through the tables, you must
change the bit rate of the BERT, the laser wavelength and amplitude settings, and
the signal conditioning mode in the oscilloscope, according to the table and row
you are completing.
BERT.
Set the BERT parameters as follows:
1. Recall the 2.48832 Gb/s bit rate.
2. Set the pattern to PRBS–31.
3. Disable the adjustable duty cycle.
4. Set the mark ratio to 1/2.
5. Set the trigger to 1/32 clock.
6. Set the data amplitude to 1.5 V
p–p
.
Tunable Laser.
Set the tunable laser parameters as follows:
1. Set the wavelength to 1530 nm.
2. Set the amplitude to 5 dBm.