Theory of Operation
CSA8000 & TDS8000 Instruments and Sampling Modules
3–7
The 80C02 module is optimized for testing of long-wavelength (1100-1650 nm)
signals at (9.953 Gbps) SONET OC-192 / SDH STM-64 standards. With its high
optical bandwidth (>30 GHz) it is also well suited to general purpose high-per-
formance optical component testing.
H
OC192: The electrical sampler is adjusted to give the desired response,
and signal is not routed through any filter (signal is sent through the
straight-through path). The sampler bandwidth and response is optimized
during the calibration such that the combined system will have an
OC192 (STM-64) Reference Receiver response.
H
12.5 GHz: The sampler bandwidth and response is set during the
calibration such that the combined system will have an Optical
Bandwidth (–6dB) > 12.5 GHz.
H
20 GHz: The sampler bandwidth and response is set during the
calibration such that the combined system will have an Optical
Bandwidth (–6dB) > 20 GHz.
H
30 GHz: The sampler bandwidth and response is set during the
calibration such that the combined system will have an Optical
Bandwidth (–6dB) > 30 GHz.
For major functional circuit blocks refer to (Figure 9–7 on page 9–7).
The 80C03 module supports conformance testing of both short and long
bandwidth (700-1650 nm) signals at 1.063, 1.250, and 2.488 Mbps as well as
general purpose testing with up to 2.3 GHz optical bandwidth. Its amplified
optical to electrical converter design enables the user to examine very low-level
optical signals.
H
OC48: The electrical sampler is adjusted to approximately 12.5 GHz
(–3dB) bandwidth and signal is not routed through any filter (signal is
sent through the straight-through path). The O/E converter is designed
by the vendor to match the OC48 reference receiver response curve. The
span adjustment provides limited adjustment of the frequency response.
It is adjustment at the factory such that the combined system will have
during calibration such that the combined system will have an OC48
(STM-64) Reference Receiver response. This mode is synonymous with
the 2.3 GHz maximum bandwidth setting.
H
FC: The electrical sampler is adjusted and O/E converter span voltage
are the same values as in the OC48 mode. The signal is routed through a
hardware filter designed to result in the combined system having an
FC1063 (1.0625 Gb/s Fibre Channel) Reference Receiver response.
H
GBE: The electrical sampler is adjusted and O/E converter span voltage
are the same values as in the OC48 mode. The signal is routed through a
80C02 Optical Sampling
Module
80C03 Optical Sampling
Module
Содержание CSA8000 Series
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