Atec Anritsu_MS9720A - Manual (Page 2)

2
±20 pm Wavelength Accuracy with Built-in Light Source
■ ±20 pm Wavelength Accuracy (Reference Optical Source Built-in)
■ 58 dB Dynamic Range (1 nm from Signal Wavelength)
■ –87 dBm Optical Reception Sensitivity
■ Three Memories, Three Traces, Split Screen
■ Full Line-up of Functions and Applications
■ VGA Output Connector
The MS9720A is an optical spectrum analyzer with a
diffraction grating that is used to measure and analyze optical spectra in the 1450 to
1650 nm band for WDM communications systems.
In addition to having excellent basic performance such as high wavelength accuracy,
wide dynamic range and good optical reception sensitivity ideally suited to measurement
and analysis of the optical spectra used in WDM communications, it also has a full line-up
of functions matching a wide range of needs ranging from manufacturing of WDM
communications devices, to installation and maintenance.
A wavelength accuracy of ±20 pm is achieved over a range
of 1530 to 1570 nm by performing calibration using the built-
in wavelength reference light source. Wavelength calibration
is performed automatically just by pressing the Cal key, per-
mitting accurate measurement of the absolute wavelength
value required in evaluation of WDM systems. Calibration of
the absolute wavelength value uses the absorption spec-
trum of acetylene. The block diagram of the calibration light
source is shown below. In addition, the output of the built-in
SLD light source can be used for evaluating the transmission
characteristics of passive elements
Three Memories, Three Traces, Split Screen
Up to three memories can be used for measurement; the
results found by mathematically processing the data in these
three memories can be displayed as up to three traces on
the screen. Furthermore, by using the split screen function,
it is possible to simultaneously display two sets of measure-
ment data on the screen as well as the difference between
the two sets of data.
The following screen shows a measurement of filter charac-
teristics; the top half of the split screen shows the reference
light and the measured optical spectrum while the bottom
half shows the spectrum of the measured light minus the
reference light.
Measure-
ment
section
SLD optical
output
Optical input
SLD light
source Acetylene
absorption cell
Optical
switch
Block Diagram of Calibration Light Sourc
Ideal for High-Performance WDM Measurement
From R&D and production to installation and maintenance of
WDM communications devices