Transmitter And Cabinet; Receiver - JDS Uniphase SWS15100 User Manual

Transmitter and Cabinet

The transmitter consists of a tunable laser source and a source optics module (SOM).
The tunable laser source provides the measurement signal for the DUT. It is continuously
tunable, with no mode hops. Its default operational mode is continuously tuning 1520 to 1570 nm
at 20 nm/s for the C-band version and 1541 to 1630 nm at 20 nm/s for the L-band version.
Although operating instructions are contained in this manual for using the tunable laser source
within the SWS, see the SWS15101 and SWS16101 Tunable Laser Source User's Manual
(document SD000319) for more information.
The source optics module provides real-time measurement of the wavelength of the signal,
filters the signal to improve its signal-to-noise ratio, and controls the tunable laser operation. The
standard SWS package includes a single output on the front of the unit. Two or four output
options are also available. The source optics module comes with standard FC/PC universal
connectors.
The source optics module and the tunable laser source can be installed in the supplied
transmitter cabinet. The cabinet is a standard half rack wide and three units high, in accordance
with Standard EIA-310-D.

Receiver

The receiver measures the power throughput from the DUT and uses a proprietary protocol to
communicate with the computer. The standard SWS package includes one receiver chassis,
but more can be added to increase the number of channels and, therefore, the number of
devices that can be tested.
The receiver chassis communicates with the user-supplied computer through the parallel port. A
data acquisition board, available as an option, can replace the parallel interface. The board can
be used to speed up data acquisition on systems with a large number of detector modules.
The chassis usually houses two types of modules: a control module and a detector module. The
control module is a hardware controller for the receiver chassis. It synchronizes the transmitter
and the receiver. It decodes the wavelength data sent by the transmitter and combines them with
the power data read from the detector module(s). The detector module is a dual power detector;
each detector module records power for two channels. The outputs from the DUT are connected
to the detector module(s).
The chassis also houses the optional dual band selector switch module (DBSSM), if two
transmitters are used for transmission of signals to the control module. The DBSSM can be
switched to either input to obtain a wider wavelength span than is normally available using one
transmitter.
Up to eight detector modules can be installed in each receiver chassis, with each detector
module containing two detectors. Up to eight chassis can be used for each receiver station;
therefore, up to 128 channels at a time can be measured for each receiver station. The SWS
can also be expanded to four receiver stations for each transmitter.
A compact two-channel receiver is available, as an option, for users who do not need the
expansion and multichannel capabilities of the standard receiver, but instead require a compact
General Information and Specifications – 11
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