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User and Service Guide
Agilent 83446A/B
Lightwave Clock/Data
Receiver

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Agilent part number: 83446-90018 Edition 1 Printed in A March 2000 1400 F ountaingrove P arkway , Santa Rosa, CA 95403-1799, US A Notice . The information contained this document is subject change without notice . Agilent T echnologies makes no warranty of kind with regard to this material, including but not limited to , the implied warranties of merchantability tness for a particular purpose . Agilent T echnologies shall not be liable for errors contained herein or for incidental or consequent

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Printing History Agilent Part Number Edition Date 83446-90004 Edition 1 October 83446-90011 Edition 1 June 83446-90018 Edition 1 March iii 2000 1995 1994

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Safety Symbols following safety symbols are used throughout this manual. F amiliarize yourself with each the symbols its meaning before operating this instrument. caution sign denotes a hazard to the instrument. It calls attention a C AU TI O N procedure which, if not correctly performed or adhered to , could result damage to destruction of instrument. not proceed beyond a caution until the indicated conditions are fully understood warning sign denotes a life-threatening hazard. It calls attenti

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General Safety Considerations This is a Safety Class I product (provided with a protective earthing W A R N I N G ground incorporated in power cord). The mains plug shall only be inserted a socket outlet provided with a protective earth contact. interruption the protective conductor inside outside the instrument is likely make instrument dangerous . Intentional interruption is prohibited. Before this instrument is switched on , make sure it has been properly W A R N I N G grounded through he t p

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Certication and Assistance Agilent T echnologies certies that this product met published specications the time of shipment from the factory . Agilent T echnologies further certies that its calibration measurements are traceable the United States National Institute of Standards and T echnology (NIST), to extent allowed the Institute’s calibration facility , to the calibration facilities of other International Standards Organization members . Product maintenance agreements and other customer a

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Declaration of Conformity vii

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W arranty This Agilent T echnologies instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Agilent T echnologies will, option, either repair or replace products which prove to be defective . F or warranty service or repair , this product must returned a service facility designated by Agilent T echnologies . Buyer shall prepay shipping charges to Agilent T echnologies and Agilent T echnologies shall

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Contents 1. General Information Description the Agilen t 83446A/B . . . . . . . . . . F ron t-panel features . . . . . . . . . . . . . . . . Rear . . . . . . . . . . . . . . . . Agilen t Sp ecications Characteristics . . . Electrostatic Disc harge Information . . . . . . . . . . damage . . . . . . . . . . . . . . . 2. Installation and Preparation for Use Installing Agilen t 83446A/B . . . . . . . . . . . . Step Insp the shipmen t . . . . . . . . . . . . Step Set the line v selector . . . . . .

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Replaceable parts Example of optimizing laser . . . . . 3-11 W aveform T est . . . . . . . . . . .. .. .. .. . . . 3-13 Example of measuring e diagram using reco v ered c k signal . . . . . . . . . . . . . . . . . . . . . 3-13 4. Servicing the Agilent 83446A/B General information . . . . . . . . . . . . . . . . . 4-3 T roublesho oting . . . . . . . . . . . . . . . . . . . 4-5 Adjustmen t Pro cedures . . . . . . . . . . . . . . . 4-8 P o w supply adjustmen t pro cedure . . . . . . . . . 4-8 Photo

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Figures 1-1. Agilent 83446A/B block diagram. . . . . . . . . . . . . . 1-4 1-2. The Agilent 83446A/B front-panel. . . . . . . . . . . . . 1-6 1-3. The Agilent 83446A/B rear panel. . . . . . . . . . . . . . 1-8 1-4. Example of a static-safe work station. . . . . . . . . . . . 2-1. Opening the fuse holder door . . . . . . . . . . . . . . . 2-2. Selecting line voltage and checking the fuse . . . . 2-3. A C power cables available . . . . . . . . . . . . .. .. . 2-9 2-4. Connecting Agilent 83446A/B t

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T ables 1-1. Agilent 8 3446A/B Specications and Characteristics . . . . . 1-10 1-2. Static-Safe A ccessories . . . . . . . . . . . . . . . . . . 1-14 2-1. Agilent 8 3446A/B P ower Requirements . . . . . . . . . . 2-7 2-2. Agilent T echnologies Service Numbers . . . . . . . . . . . 2-18 3-1. A verage Gating P eriod to A chieve 100 Errors . . . . . . . . 3-5 4-1. Required T ools . . . . . . . . . . . . . . .. .. .. . 4-4 4-2. V oltages the DC P ower Supply T erminals . . . . . . . . 4-7 4-3. Requ

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1 General Information

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General Information What you’ll nd in this chapter A brief description Agilent 83446A/B lightwave lock/data c receiver . A list options and accessories available . Agilent 83446A/B specications and characteristics. Information about lightwave receiver’s serial number label. Information about avoiding damage to instrument from electrostatic discharge . 1-2 the the of the of

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Description of the Agilent 83446A/B Agilent 83446A/B lightwave clock/data receivers are designed to extract clock and d ata information from digitally modulated lightwave signals . They operate at the following SONET/SDH rates: Agilent 83446A : :: : : : : : : : : : : : : : : : : : :: :: :: :: : : : : : : : : : : : : : : : : : :: 2.48832 Gb/s Agilent 83446B : :: : : : : : : : : : : : : : : : : : :: :: :: :: : : : : : : : : : : : : : : : : : :: : 622.08 Both receivers have been designed per the re

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General Information Description of the Agilent 83446A/B F or more information on using the lightwave clock/data receiver refer Chapter Learning the inside The lockb diagram for the Agilent 83446A/B is shown in Figure 1-1 . story . . . optical-to-electrical conversion performed by a sensitive APD photodetector which covers 1310 1550 nm wavelength ranges . optical input uses 50 m multimode for compatability with either single-mode multimode . slight loss sensitivity results when used 62.5 m b

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General Information Description of the gilent A Accessories supplied Agilent 83446A/B lightwave clock/data receiver is shipped with: P ower cable (refer to Figure 2-3 ) FC/PC front-panel connector interfaces A gilent 83446A/B Lightwave Clock/Data R eceiver User and Service Guide . Options following option is available: Option Deletes FC/PC front-panel connector interface Fiber Optics Handbook , gilentA part number 5952-9654, is introduction and reference for ber-optic m easurements . Serial Num

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General Information Description of the Agilent 83446A/B Front-panel features Figure 1-2. The Agilent 83446A/B front-panel. 1-6

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General Information Description of the gilent A Line switch. P owerline LED . CLOCK connector . Output is nominally 2.48832 GHz (622.08 MHz for Agilent 83446B). When SYNC LOSS indicator is extinguished this output is synchronized with the bit rate of input signal. When synchronized to input signal output free-runs near nominal clock frequency . SYNC indicator . This LED o whenever clock output is synchronized to the rate of input signal. Note that CLOCK can remain synchronized input signals sev

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General Information Description of the Agilent 83446A/B Rear anel p features Figure 1-3. The Agilent 83446A/B rear panel. P ower line module . INPUT connector . Use to recover clock and data from n a electrical signal. INPUT SELECT switch. Use select between front optical input rear electrical input. 1-8 and to RECOVERY CLOCK 3. RECOVERY CLOCK 2. 1.