MS9710C
Optical Spectrum Analyzer
600 to 1750 nm
High Performance, Portable Optical Spectrum Analyzer
Compact High Performance
Compact High Performance
■ Wavelength accuracy of ±20 pm (WDM-band)
■ Dynamic range of 42 dB (0.2 nm from peak wavelength),
70 dB (1 nm from peak wavelength)
■ Resolution (FWHM) of 0.05 nm max.
■ WDM measurement of wavelength, level,
and SNR for up to 300 channels
■ –90 dBm optical reception sensitivity
■ Tracking function with tunable laser source
The MS9710C is a diffraction-grating spectrum analyzer for analyzing optical spectra in the 600 to 1750 nm wavelength
band. In addition to uses such as measurement of LD and LED spectra, it has functions for measuring the transmission
characteristics of passive elements such as optical isolators, as well as NF/Gain of optical fiber amplifier systems.
In addition to its basic features, the superior stability and reliability of the diffraction grating (patent pending) offer the
severe level and wavelength specifications particularly in the WDM band.
This analyzer has the dynamic range, reception sensitivity and sweep speed requested by users, backed by Anritsu’s
high-level technology. The high sensitivity meets the exacting demands placed on today’s measuring instruments.In
particular, the excellent wavelength and level specifications fully meet the dense WDM requirements (1520 to 1620 nm).
The MS9710C Optical Spectrum Analyzer is the successor to the popular MS9710B but with improved functions and
higher performance. The specifications have been upgraded for the important 1.55 µm band for WDM communications
and have also been optimised to include the new requirements for the L-band (1570 to 1620 nm) use. In addition to the
high reliability and excellent basic performance, this analyzer has a full range of application functions to support accurate measurement in the fastest possible time.
70 dB dynamic range
The dynamic range at 0.2 nm from the peak wavelength is better than 42 dB and is a high 58 dB min. at 0.4 nm from the
peak, permitting high-accuracy measurement of DWDM systems with a 50 GHz (0.4 nm) channel spacing. The analyzer
demonstrates its excellence in SNR measurement of WDM
light sources, as well as in evaluation of narrow-band optical
band pass filters.
Distance from peak wavelength 0.2 nm 0.4 nm 1 nm
Normal dynamic range mode 42 dB (45 dB typical) 58 dB 62 dB
High dynamic range mode 42 dB (45 dB typical) 60 dB 70 dB
High-dynamic range measurement example with DFB-LD
spectrum passed via narrow-band Band-Pass Filter (BPF).
DFB-LD Narrow-band BPF MS9710C
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–90 dBm guaranteed optical reception sensitivity
Full function lineup
The MS9710C has achieved an improved S/N over a wide
range by countering the effects of noise and stray light. The
RMS noise level at wavelengths from 1250 to 1600 nm is –90
dBm max. The screen display below is the waveform obtained
when measuring a 1550 nm DFB-LD optical source with a
power level of –85 dBm; only 25 seconds are required for one
sweep.
The S/N ratio can be improved using sweep averaging.
Waveform after 10 averages
Relying on WDM transmission
As a result of the need for increased transmission capacity,
R&D into large-capacity transmission techniques is becoming
more active and Wavelength Division Multiplexing (WDM) is
now in use. This WDM transmission technology requires
quantitative measurement of the signal quality and wavelength
transmission characteristics of each channel.
Measuring instruments for this purpose require highly accurate
wavelength and level measurements. Furthermore, accurate
measurement of fiber-amplifier NF requires extremely good
polarization dependant loss characteristics and level linearity
specifications.
The MS9710C design achieves excellent wavelength and level
specifications for this purpose in the 1520 to 1620 nm wavelength band and also in the extended band (L-band) to 1620
nm. In particular, the wavelength accuracy can be calibrated
automatically using an optional internal reference wavelength
light source; the post-calibration accuracy is better than ±20 pm.
Specifications for WDM application
Mainframe,
option
Wavelength ±20 pm (1530 to 1570 nm)
accuracy*1±50 pm (1520 to 1600 nm)
Wavelength
resolution
Resolution ≤±3 % (1530 to 1570 nm, ≤±3 % (1520 to 1620 nm,
accuracy resolution: 0.2 nm) resolution: 0.2 nm)
Level ±0.1 dB (1530 to 1570 nm)
flatness to ±0.3 dB (1520 to 1620 nm)
wavelength Resolution: 0.5 nm, ATT:off
Polarization
dependency
Level
linearity
∗1: After calibration with optical reference wavelength light sourceS
∗2: L-band enhancement
MS9710C With Option 15*
±20 pm (1520 to 1620 nm)
50 pm (FWHM of internal optical BPF)
±0.1 dB (1520 to 1620 nm)
±0.05 dB (1550/1600 nm)
±0.05 dB (1550 nm) ±0.05 dB (1550/1600 nm)
–50 to 0 dBm (ATT: off)
–30 to +20 dBm (ATT: on)
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In addition to its excellent basic functions, the MS9710C
comes with a full lineup of other useful functions summarized
in the following table.
Device analysis
Waveform analysis methods; SMSR, half-width evaluation, WDM
Application
measurement
Modulation, pulsed Max.frequency range (VBW) = 1 MHz (See
light measurement ‘applications’ section.)
Markers
Power monitor Also functions an optical power meter
Vacuum Converts displayed wavelength to value in
wavelength display vacuum
External interfaces GPIB, RS-232C, VGA monitor output
DFB-LD waveform analysis
Waveform analysis using zone marker
Half-width measurement by threshold method
For analyzing and evaluating waveforms of
optical devices (DFB-LDs, FP-LDs, LEDs)
For waveform analysis by RMS and threshold
waveform analysis
EDFA NF and gain measurement, polarization
mode dispersion measurement (See ‘applications’ section.)
Multimarkers:
Marker function for max. 300 points
(See ‘applications’ section.)
Zone markers:
For waveform analysis within zone
Peak/dip search: Searches for a peak or dip
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● Easy-to-read color TFT-LCD
● Thermal
printer built-in
The MS9710C screen
display can be hardcopied at high speed the
internal printer, as well
as output to an external
printer via the GPIB.
Pictures actual size
● 3.5 inch internal FDD
In addition to saving and recalling measurement data,
etc., waveforms saved to floppy disk can be easily
and directly read by a personal computer.
The PC screen shown on the right is displaying an
image of the MS9710C screen saved to floppy disk.
Screen images can be saved to FD media and output
as Windows
the data can be output in text-file format, it can be
manipulated easily using spreadsheet software.
®
bitmap-format files. In addition, since
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