Getting Started With The Reference Transmitter Module; What Is A Reference Transmitter Module - Keysight Technologies 81490A User Manual

Getting Started
Getting Started with the Reference Transmitter
Module
What is a Reference
Transmitter Module?
10
A reference transmitter is an electrical-optical (E/O)
converter, where the data input modulates the output of a
(DFB) laser.
The Keysight 81490A Reference Transmitter Module offers
excellent eye quality as a reference for testing 10 GbE-LR
and 10 GbE-ER, according to IEEE 802.3ae and according to
10 G Fibre Channel specifications.
Offering both 1310 and 1550 nm gives the fastest
reconfiguration between these two transmission bands
without reconnecting.
The separation of the signal source and the modulator is the
only way to offer a zero-chirp modulation. This is essential
for a clean and repeatable eye diagram when modulating
with an appropriate clean external source to fulfill the
requirements of the IEEE standard. Another advantage of
this design, compared with directly modulated transmitters,
is the wide extinction ratio range that can only be achieved
by this architecture. Additionally, the reference transmitter
has a linear transmission behavior. This means that when
used with an electrical arbitrary waveform generator, the
Keysight 81490A Reference Transmitter Module can be used
as an optical arbitrary waveform generator.
Keysight 81490A Reference Transmitter Module User's Guide, Edition 3.0

Getting Started with the Reference Transmitter Module