Atec MS9720A User Manual

High-Performance WDM Measurement
MS9720A
WDM Network Tester
2
±
20 pm Wavelength Accuracy with Built-in Light Source
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 built­in wavelength reference light source. Wavelength calibration is performed automatically just by pressing the Cal key, per­mitting accurate measurement of the absolute wavelength value required in evaluation of WDM systems. Calibration of the absolute wavelength value uses the absorption spec­trum 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 ev aluating 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 measure­ment data on the screen as well as the difference between the two sets of data. The following screen shows a measurement of filter charac­teristics; 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.
Measure­ment 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
3
58 dB Dynamic Range
The measurement dynamic range at the wavelength 1 nm from the peak is 58 dB demonstrating the tester’s power when measuring the SNR of light sources in WDM systems and when evaluating filters, etc.The following screens show the dynamic range at 1 and 0.5 nm from the peak.
–87 dBm Optical Reception Sensitivity
The MS9720A noise level is –87 dBm, so the tester is ideal for measuring the SNR of light sources used in WDM sys­tems, as well as optical leakage and reflected light.The fol­lowing screen shows a measurement of an optical spectrum of a DFB LD with the output level attenuated to –85 dBm at a VBW of 10 Hz.
The SNR is improved by using averaging processing. The following is an example of measurement result after 10 sweep averaging are performed.
Dynamic range
58 dB (1 nm from peak) 53 dB (0.5 nm from peak)
4
Full Line-up of Functions and Applications
In addition to its excellent basic performance, the MS9720A has a full line-up of useful functions. The basic waveform analysis functions offer applications for evaluating every important item in WDM systems.
The following screens show threshold and SNR analysis of a WDM signal waveform. The effective analysis range is set using the Zone Marker even f or WDM signals , enab ling inde­pendent analysis of the waveform of each channel.
Insertion Loss Measurement
At insertion loss measurement, the inser tion loss of optical devices such as optical couplers can be measured.The fol­lowing screen shows a measurement of the transmission characteristics of a band pass filter.
In addition, the measurement results for a specified WDM channel wavelength can be displayed as a list.
The following diagrams show the setup when measuring the insertion loss of a WDM coupler using the built-in SLD , or an external light source.
Reference Measurement
Waveform analysis
Applicable measurement
Threshold analysis, SMSR analysis, spec­trum power (integrated power calculation)
Insertion loss, isolation, directivity, return loss, polarized mode dispersion (PMD), fiber amplifier noise figure (NF), WDM wavelength analysis, long-term measurement
Externallight
COM
Tx1 Rx2 Tx3
Rx4 Tx5
Rx6 Tx7
Rx8
MS9720A
5
Insertion Loss Measurement
Isolation Measurement
By using the same setup, it is possible to measure the opti­cal leakage between each channel of an optical coupler and to measure the isolation. Moreover, when used in combina­tion with an external light source, it is possible to measure the directivity to evaluate the very weak optical leakage between send and receive channels.
Return Loss Measurement
When the MS9720A is combined with the dedicated MN9604C Optical Directional Coupler (sold separately) and the total reflection optical fiber (sold separately), the return loss can be measured.
The following screens show a measurement of the reflection at the fiber input end (open) using a four-wave WDM light source as the external light source.
DUT
Total reflection optical fiber for reference
MN9604C Optical Directional Coupler
Built-in SLD or external light source
MS9720A
Help Function
All the measurement procedures and set ups for applica­tions are explained by easy-to-understand diagrams that are displayed by pressing the Help key.
Externallight
MS9720A
Tx1 Rx2 Tx3
Rx4 Tx5
Rx6 Tx7
Rx8
COM
Tx1
MS9720A
Rx2 Tx3
Rx4 Tx5
Rx6 Tx7
Rx8
COM
6
3.5-inch Floppy Disk Drive
In addition to saving and recalling data to and from FD, waveform images saved on FD can be viewed on a personal computer screen. The MS9720A can save waveform images to FD as either Windows bitmapped files or text files.Moreover, the data can be exported eas­ily into word processing and spreadsheet software applications.
*The photograph is nearly actual size.
7
Optical Input Connectors
Any of FC-PC, DIN, ST, SC, HMS-10/A or E2000 connectors can be used. Cleaning is easy because the connector can be removed and refitted (except E2000).
SLD Output
The MS9720A has an SLD light source which is very useful for evaluating the transmission characteristics of WDM devices.
8
Long-Term Measurement
The MS9720A has a long-term measurement function for displaying the wavelength, level and SNR, etc., as a table, and saving the average, maximum and minimum value of each measurement to floppy disk as a text file at a set mea­surement interval. During long-term measurement, wave­length calibration is performed every 6 hours, and level cali­bration every 1 hour.
PMD Measurement
It is also possible to measure the PMD (Polarization Mode Dispersion), an important factor determining the upper limit of the transmission bit rate in optical fiber amplifier systems. The MS9720A has a function for calculating PMD using a fixed analyzed method which is one measurement method. The PMD can be measured easily by using the following type of measurement system.
The diagram below shows PMD measurement of a 1 m PANDA fiber.
NF Measurement
The MS9720A can measure NF using interpolation technic (level fitting method). In the MS9720A NF measurement function, the ASE (Amplified Spontaneous Emission) is cal­culated by the averaging the sum of the level at two points separated by a fixed wavelength from the signal wavelength of the EDFA output. The following screens show a mea­surement of the NF of an EDFA amplifying a WDM signal.
PRM:Polarization rotation module (sold separately)
SLD output
MS9720A
Optical input
PRM
PRM
9
WDM Wavef orm Analysis
A major problem of WDM transmission systems is the sig­nal-to-noise ratio (SNR) of each signal channel.Quantitative measurement and evaluation of SNR is extremely impor tant in WDM transmission systems.The MS9720A can analyze up to 128 WDM waveforms and display the peak wave­length, level and SNR of each channel.
Wide-Bandwidth, High-Output SLD Light Source
The following screen shows the output spectrum of the SLD from 1450 to 1650 nm. At 1550 nm and a resolution of 1 nm, the output level is –40 dBm min. A dynamic range of approx. 50 dB can be measured with setting the VBW 10 Hz.
The screen below shows analysis of a 16-channel WDM waveform; the level difference of each channel is displayed using the channel on the left side as a reference. Any chan­nel can be set as the reference.
VGA Output Connector
A VGA output connector is provided on the rear panel of the MS9720A for displaying the measurement screen on a PC monitor.
10
Specifications
Applicable fiber 10/125 µm SM fiber (ITU-T G.652) Optical connector User replaceable (FC, SC, ST, DIN, HMS-10/A), Factory option (E2000, FC-APC, SC-APC, HRL-10)
Range: 1450 to 1650 nm Accuracy: ±20 pm (1550 ±20 nm, room temperature), ±50 pm (1520 to 1600 nm),
±0.3 nm (all range) *After wavelength calibration
Wavelength
Stability: ±5 pm (smoothing: 11 pt, 1 minute, at half-width of center wavelength) Linearity: ±20 pm (1550 ±20 nm) Read resolution: 5 pm (display resolution: 1 pm) Setting resolution: 0.1, 0.2, 0.5, 1.0 nm (filter: 3 dB bandwidth) Resolution accuracy: ±10% (1550 ±20 nm, 0˚ to 30˚C), 30% (1550 ±100 nm, 0˚ to 30˚C) Measurement level ranges:
–87 to +10 dBm (1450 to 1600 nm, 0˚ to 30˚C), –72 to +10 dBm (1600 to 1650 nm, 0˚ to 30˚C), –82 to +10 dBm (1450 to 1600 nm, 30˚ to 50˚C), –67 to +10 dBm (1600 to 1650 nm, 30˚ to 50˚C),
Level
–68 to +23 dBm (1450 to 1600 nm, 0˚ to 30˚C, internal optical attenuator: on) Accuracy: ±0.4 dB (1550 nm, –23 dBm) Stability: ±0.02 dB (1550 nm, –23 dBm, 1 minute, constant temperature, no polarization fluctuation) Linearity: ±0.05 dB (1550 nm, –50 to 0 dBm) Flatness: ±0.1 dB (1550 ±20 nm), ±0.3 dB (1520 to 1600 nm)
Polarization dependency ±0.15 dB Dynamic range 58 dB (at point 1 nm from peak), 53 dB (at point 0.5 nm from peak) Optical return loss 35 dB (1550 nm) SLD output >–40 dBm/nm (at 1550 nm) Display 6.4-inch color TFT-LCD Memory trace Three measurement memories and three trace displays Printer Internal (thermal type) Interface GPIB, RS-232C, monitor output (VGA compatible) Data save/output 3.5-inch floppy disk drive
Operating temperature: 0˚ to +50˚C (however, 5˚ to 50˚C for FDD)
Ambient conditions Storage temperature: –20˚ to +60˚C
Relative humidity: 90% (no condensation, 20% to 80% for FDD)
Power 85 to 132 Vac/172 to 250 Vac, 47.5 to 63 Hz, 150 VA (max.) Dimensions and mass 320 (W)
× 177 (H) × 350 (D) mm (excluding projections), ≤16.5 kg
Note: Warm-up to the MS9720A for about 5 minutes to ensure stable operation. The above specifications are obtained at 2-hours after power-on.
11
Ordering Information
Model/Order No. Name Remarks
Main frame
MS9720A WDM Network Tester
Standard accessories
Optical connector adaptor*
1
:1 pc F0012 Fuse, 3.15 A: 2 pcs For 100 Vac F0010 Fuse, 1.6 A: 2 pcs For 200 Vac W1343AE MS9720A operation manual: 1 copy W1344AE MS9720A remote control operation manual: 1 copy
Power cord, 2.6 m: 1 pc B0329G Front cover: 1 pc 3/4MW4U Z0312 Printer paper: 2 rolls MX972001S LabVIEW
®
Driver (RS-232C): 1 pc
MX972001G LabVIEW®Driver (GPIB) 1 pc
Options
MS9720A-27 E2000 (DIAMOND) connector Factory option MS9720A-31 EC (RADIAL) connector Factory option MS9702A-37 FC connector MS9720A-38 ST connector MS9720A-39 DIN connector MS9720A-40 SC connector MS9720A-43 HMS-10/A (DIAMOND) connector MS9720A-47 HRL-10 connector Factory option
Application parts
MN9604C Optical Directional Coupler J0654A Serial interface cable IBM-PC/AT, J-310 (remote control) J0655A Serial interface cable 9P-25P J0007 GPIB cable, 1 m 408JE-101 J0617B Replaceable connector(FC) J0618D Replaceable connector (ST) J0618E Replaceable connector (DIN) J0618F Replaceable connector (HMS-10/A) J0619B Replaceable connector (SC) J0635B Optical fiber cord (FC•PC-FC•PC-2M-SM), 2 m J0441 Total internal reflection fiber cord Z0282 Replacement reel for ferrule cleaner Kuretop A type Z0283 Ferrule cleaner spare tape For Z0282, 6 pcs/set Z0284 Adapter cleaner Stick type, 200 pcs/set B0330C Tilt bail B0336C Hard carrying case G0084A Polarization rotation module
Please specify the model/code, name and quantity when ordering.
*1: Specify the connector to be supplied as the standard connector when ordering the above options.
If the connector is not specified, the FC connector (MS9720A-37) is supplied as standard.
No.MS9720A-E-A-1-(3.00) Printed in Japan 2000-2 50KL/O
Specifications are subject to change without notice.
ANRITSU CORPORATION
5-10-27, Minamiazabu, Minato-ku, Tokyo 106-8570, Japan Phone: +81- 3 - 3446 - 1111 Telex: J34372 Fax: +81-3 - 3442 - 0235
Overseas Subsidiaries
U.S.A. ANRITSU COMPANY North American Region Headquarters
1155 East Collins Blvd., Richardson, Tx 75081, U.S.A. Toll Free: 1 - 800 - ANRITSU (267- 4878) Phone: +1-972 - 644 - 1777 Fax: +1-972 - 671 - 1877
Canada ANRITSU ELECTRONICS LTD.
Unit 102, 215 Stafford Road West Nepean, Ontario K2H 9C1, Canada Phone: +1- 613 - 828 - 4090 Fax: +1-613 - 828 - 5400
Brasil ANRITSU ELETRÔNICA LTDA.
Praia de Botafogo 440, Sala 2401 CEP 22250-040, Rio de Janeiro, RJ, Brasil Phone: +55- 21 - 5276922 Fax: +55-21 - 537 - 1456
U.K. ANRITSU LTD.
200 Capability Green, Luton, Bedfordshire LU1 3LU, U.K. Phone: +44- 1582 - 433200 Fax: +44-1582 - 731303
Germany
ANRITSU GmbH
Grafenberger Allee 54-56, 40237 Düsseldorf, Germany Phone: +49- 211 - 96855 - 0 Fax: +49-211 - 96855 - 55
France
ANRITSU S.A.
9, Avenue du Québec Z.A.de Courtabœuf 91951 Les Ulis Cedex, France Phone: +33- 1 - 60 - 92 - 15 - 50 Fax: +33-1-64-46-10-65
Italy
ANRITSU S.p.A.
Via Elio Vittorini, 129, 00144 Roma EUR, Italy Phone: +39- 06 - 509 - 9711 Fax: +39-06 - 502 - 24 - 25
Sweden
ANRITSU AB
Botvid Center, Fittja Backe 1-3 145 84 Stockholm, Sweden Phone: +46- 853470700 Fax: +46-853470730
Singapore
ANRITSU PTE LTD.
6, New Industrial Rd., #06-01/02, Hoe Huat Industrial Building, Singapore 536199 Phone: +65- 282 - 2400 Fax: +65-282 - 2533
Hong Kong
ANRITSU COMPANY LTD.
Suite 719, 7/F., Chinachem Golden Plaza, 77 Mody Road, Tsimshatsui East, Kowloon, Hong Kong, China Phone: +852- 2301 - 4980 Fax: +852-2301 - 3545
Korea
ANRITSU CORPORATION
14F Hyun Juk Bldg. 832-41, Yeoksam-dong, Kangnam-ku, Seoul, Korea Phone: +82- 2 - 553 - 6603 Fax: +82-2 - 553 - 6604
˜
5
Australia
ANRITSU PTY LTD.
Unit 3/170 Forster Road Mt.Waverley, Victoria, 3149, Australia Phone: +61- 3 - 9558 - 8177 Fax: +61-3 - 9558 - 8255
Taiwan
ANRITSU COMPANY INC.
6F, 96, Sec. 3, Chien Kou North Rd. Taipei, Taiwan, R.O.C. Phone: +886- 2 - 2515 - 6050 Fax: +886-2 - 2509 - 5519
Loading...