Tektronix OI1125, Instruction Manual

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Getting Started
6
OI1125 E/O Transmitter Instruction Manual
Functional Check
To perform a functional check of the OI1125 E/O Transmitter, you must connect
a setup as shown in Figure 2. This setup measures the optical output of the
transmitter directly, requiring an oscilloscope or signal analyzer with optical
input capabilities. This is the method that is used in the Eye Pattern Test Matrix
in the Performance Verification on page 44.
The equipment required, besides the transmitter and the optical and electrical
cables supplied as standard accessories, is listed below.
H
A pattern generator capable of producing data rates from 2.4 Gb/s to
12.50 Gb/s, with output levels in the range of 0.25-1.5 V
p-p
.
H
An optical-input oscilloscope capable of measuring single-mode optical
signals in the 1550 nm band at data rates up to 12.50 Gb/s.
H
A 50
W
SMA cable to connect the pattern generator divided-clock output as
an oscilloscope trigger signal.
Alternatively, you can use an optical-to-electrical converter on the optical output
of the transmitter, so that you can use a conventional, electrical-input oscillo-
scope or analyzer to measure the transmitter output.
Pattern generator
OI1125
Laser in
(FC/APC)
Modulator out
(FC/APC)
CSA8000/TDS8000 w/80C01
Data
Clock
32
Trigger direct in
Modulator
data in
Laser out
(FC/APC)
PMF fiber
Single mode fiber
Low-loss SMA cable
(FC/PC)
SMA cable
Figure 2: Basic functional test setup
Follow the Displaying an Eye Pattern procedure on the next page to do a
functional check of the OI1125 E/O Transmitter. If you are unfamiliar with
making fiber optic connections, refer to Connecting Signals on page 9.