Keysight 81491A/81492A Reference Transmitter Module Getting Started
■A reference transmitter is an electrical-optical (E/O) converter, where the data input modulates the output of a (DFB) laser
■Keysight's Reference Transmitters are designed to offer excellent eye quality for NRZ and PAM4 signal and can serve as universal E/O converter. The 81491A supports speed up to 32 Gbaud and 81492A upto 56 Gbaud NRZ and 53 Gbaud PAM4. The single-mode (SM) flavors (81491A-135, 81492A-135) include internal lasers at 1310 nm and 1550 nm. The 81491A comes in Multimode (MM) flavor and includes an internal laser at 850 nm (MM). External optical input for usage with tunable laser sources is available on the SM options.
■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, Keysight Reference Transmitter Module can be used as an optical arbitrary waveform generator.
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Reference Transmitter Module 、 reference transmitter 、 electrical-optical (E/O) converter |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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November 2020 |
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Edition 2.0 |
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81491-90001 |
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1.9 MB |
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