Agilent Technologies 83446A Manual

[phone] | [email protected] | artisantg.com
-~
ARTISAN
®
~I
TECHNOLOGY
GROUP
Your definitive source
for
quality
pre-owned
equipment.
Artisan Technology
Group
Full-service,
independent
repair
center
with
experienced
engineers
and
technicians
on staff.
We
buy
your
excess,
underutilized,
and
idle
equipment
along
with
credit
for
buybacks
and
trade-ins
.
Custom
engineering
so
your
equipment
works
exactly as
you
specify.
•
Critical
and
expedited
services
•
Leasing
/
Rentals/
Demos
• In
stock/
Ready-to-ship
•
!TAR-certified
secure
asset
solutions
Expert
team
ITrust
guarantee
I
100%
satisfaction
All
tr
ademarks,
br
a
nd
names, a
nd
br
a
nd
s a
pp
earing here
in
are
th
e property of
th
e
ir
r
es
pecti
ve
ow
ner
s.
Find the Keysight / Agilent 83446A at our website: Click HERE

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

Agilent part number: 83446-90018
Edition 1Printed in US
AMarch 2000
1400 F
ountaingrove P
arkway
,
Santa Rosa, CA
95403-1799, US
A
Notice
.
The information contained in this document is subject to change
without notice
.Agilent T
echnologies makes no warranty of any kind
with regard to this material, including but not limited to
, the implied
warranties of merchantability and tness for aparticular purpose
.Agilent
T
echnologies shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance
,or use
of this material.
Restricted Rights Legend.
Use
,duplication, or disclosure by the U
.S
.
Government is subject to restrictions as set forth in subparagraph (c) (1) (ii)
of the Rights in T
echnical Data and Computer Software clause at DF
ARS
252.227-7013 for DOD agencies
,and subparagraphs (c) (1) and (c) (2) of the
Commercial Computer Software Restricted Rights clause at FAR 52.227-19 for
other agencies
.
c
 Copyright Agilent T
echnologies 2000
All Rights Reserved. Reproduction, adaptation, or translation without prior
written permission is prohibited, except as allowed under the copyright laws
.

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

Safety Symbols
The following safety symbols are used throughout this manual. F
amiliarize
yourself with each of the symbols and its meaning before operating this
instrument.
CAU
TION
The
caution sign denotes a hazard to the instrument. It calls attention to a
procedure which, if not correctly performed or adhered to
,could result in
damage to or destruction of the instrument. Do not proceed beyond a
caution
sign until the indicated conditions are fully understood and met.
WARNING
The
warning
sign denotes alife-threatening hazard. It calls attention to a
procedure which, if not correctly performed or adhered to
,could result
in injury or loss of life
.Do not proceed beyond a
warning
sign until the
indicated conditions are fully understood and met.
L
The
instruction manual
symbol. The product is marked with this symbol when it is
necessary for the user to refer to the instructions in the manual.
A
This symbol denotes that the instrument uses alternating current.
j
This symbol denotes that the power supply is turned on.

This symbol denotes that the power supply is turned o.
CE The CE mark is aregistered trademark of the European Community
.
ISM1-A This symbol denotes that the instrument is an Industrial Scientic and Medical Group 1 Class
Aproduct.
The CSA mark is aregistered trademark of the Canadian Standards Association.
iv

General Safety Considerations
WARNING
This is aSafety Class Iproduct (provided with aprotective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in asocket outlet provided with aprotective earth contact.
Any interruption of the protective conductor inside or outside of the
instrument is likely to make the instrument dangerous
.Intentional
interruption is prohibited.
WARNING
Before this instrument is switched on
,make sure it has been properly
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact. Any interruption
of the protective (grounding) conductor
,inside or outside the instrument,
or disconnection of the protective earth terminal can result in personal
injury.
WARNING
If this instrument is not used as specied, the protection provided by the
equipment could be impaired. This instrument must be used in anormal
condition (in which all means for protection are intact) only
.
WARNING
There are many points in the instrument which can, if contacted, cause
personal injury
.Be extremely careful. Any adjustments or service
procedures that require operation of the instrument with protective
covers removed should be performed only by trained service personnel.
WARNING
No operator serviceable parts inside
.Refer servicing to qualied
personnel. T
oprevent electrical shock, do not remove covers
.
WARN
ING
F
or continued protection against re hazard, replace line fuse only with
same type and ratings
. The use of other fuses or materials is prohibited.
CAUTION
Always use the three-prong A
Cpower cord supplied with this instrument.
Failure to ensure adequate earth grounding by not using this cord may cause
instrument damage
.
CAUTION
This product has autoranging line voltage input. Be sure the supply voltage is
within the specied range
.
v

Certication and Assistance
Agilent Technologies certies that this product met its published specications
at the time of shipment from the factory
.Agilent T
echnologies further
certies that its calibration measurements are traceable to the United States
National Institute of Standards and T
echnology (NIST), to the extent allowed
by the Institute's calibration facility
,and to the calibration facilities of other
International Standards Organization members
.
Product maintenance agreements and other customer assistance agreements
are available for A
gilent T
echnologies products.
F
or any assistance
,contact your nearest A
gilent T
echnologies Sales and
Service Oce
.
vi

Declaration of Conformity
vii

W
arranty
This Agilent T
echnologies instrument product is warranted against defects in
material and workmanship for aperiod of one year from date of shipment.
During the warranty period, Agilent T
echnologies will, at its option, either
repair or replace products which prove to be defective
.
F
or warranty service or repair
,this product must be returned to aservice
facility designated by Agilent T
echnologies
.Buyer shall prepay shipping
charges to Agilent T
echnologies and Agilent T
echnologies shall pay shipping
charges to return the product to Buyer
.However
,Buyer shall pay all shipping
charges
, duties
,and taxes for products returned to Agilent T
echnologies from
another country
.
Agilent T
echnologies warrants that its software and rmware designated by
Agilent T
echnologies for use with an instrument will execute its programming
instructions when properly installed on that instrument. Agilent T
echnologies
does not warrant that the operation of the instrument, or software
,or
rmware will be uninterrupted or error-free
.
Limit
a
tion of W
arranty
The foregoing warranty shall not apply to defects resulting from improper
or inadequate maintenance by Buyer
,Buyer-supplied software or
interfacing, unauthorized modication or misuse
,operation outside of the
environmental specications for the product, or improper site preparation
or maintenance
.
NO OTHER W
ARRANTY IS EXPRESSED OR IMPLIED
.A
GILENT
TECHNOLOGIES SPECIFICALL
YDISCLAIMS THE IMPLIED W
ARRANTIES
OF MERCHANT
ABILITY AND FITNESS FOR AP
ARTICULAR PURPOSE.
Ex
clusive Remedies
THE REMEDIES PRO
VIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE
REMEDIES
.A
GILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR
ANY DIRECT, INDIRECT
, SPECIAL, INCIDENT
AL, OR CONSEQUENTIAL
DAMAGES, WHETHER B
ASED ON CONTRA
CT
, TORT
, OR ANY OTHER
LEGAL THEORY
.
viii

Contents
1. General Information
Description of the Agilen
t83446A/B ..........
1-3
F
ron
t-panel features ............... .
1-6
Rear panel features ................
1-8
Agilen
t83446A/B Specications and Characteristics ...
1-9
Electrostatic Disc
harge Information ..........
1-12
Reducing ESD damage .............. .
1-14
2. Installation and Preparation for Use
Installing the Agilen
t83446A/B ........... .
2-3
Step 1. Inspect the shipmen
t......... . . .
2-3
Step 2. Set the line v
oltage selector .. . . . ....
2-5
Step 3. Chec
kthe fuse .... . . . ........
2-6
Step 4. Connect the Agilen
t83446A/B to apo
wer source
2-7
Step 5. T
urn on the Agilen
t83446A/B ... . ....
2-10
Connecting the Agilen
t83446A/B to aBit-Error-Ratio
T
est Set .. . ..................
2-11
P
erforming aQuic
kCondence Chec
k.........
2-13
If the v
erication c
heckfails ............
2-13
Ho
wto Return the Agilent83446A/B for Service ....
2-15
P
ac
k
aging .. . . . ...............
2-15
Instrumen
tshipping preparation pro cedure ......
2-16
Sales and service oces ..............
2-17
Cleaning Connections for Accurate Measuremen
ts ....
2-19
T
o clean anon-lensed connector ...........
2-21
T
o clean an adapter ................
2-22
T
o test insertion loss ................
2-23
T
otest return loss .......... . . . . . . .
2-23
3. Using the Agilent 83446A/B
Bit-Error-Ratio T
est . . . . . . . . . . . . . . . . .
3-3
Example of measuring disp ersion po
wer penalt
yof
single-mo de ber . . . . . . . . . . . . . . . .
3-3
System sensitivity calibration . . . . . . . . . . . .
3-4
Determining disp ersion p o
wer penalt
y . . . . . . . .
3-7
Bit-Error-Ratio T
est . . . . . . . . . . . . . . . . .
3-10
Contents-1

Replaceable parts
Example of optimizing laser extinction ratio .....
3-11
W
aveform T
est ............
..
..
.....3-13
Example of measuring ey
ediagram using reco
v
ered clo c
k
signal ................ . . . . .
3-13
4. Servicing the Agilent 83446A/B
General information ....... . . . . . . . ...
4-3
T
roublesho oting ...... . . . . . . . ......
4-5
Adjustmen
tPro cedures ..... . . . . . . . ...
4-8
P
o
w
er supply adjustmen
tpro cedure . . . . . . . ..
4-8
Photo detector/clo c
k/data reco
v
ery assem
bly adjustmen
t
pro cedure ..... . . . ...........
4-10
P
erformance T
ests ......... . ........
4-11
T
est 1. Sensitivity.................
4-15
T
est 2. Maximum op erating input po
w
er .......
4-20
T
est 3. Electrical output signal amplitudes . . . . ..
4-21
T
est 4. Rear-panel input port v
erication (functional
c
hec
konly) ..................
4-23
T
est 5. Input optical return loss ...........
4-24
Replacemen
tPro cedures ...............
4-26
Replacing the RF cable or the RF connector .....
4-27
Replacing the ac cable assem
bly ...........
4-28
Replacing the po
w
er supply ............ .
4-30
Replacing the PCDR assem
bly ...........
4-31
Replaceable parts ................. .
4-32
Index
Contents-2

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. ...........1-13
2-1. Opening the fuse holder door
...............2-5
2-2. Selecting the line voltage value and checking the fuse
....2-6
2-3. A
Cpower cables available
................ . 2-9
2-4. Connecting the Agilent 83446A/B to abit error ratio test
system. .......................2-11
3-1. Setup for calibration of dispersion power penalty test system. 3-4
3-2. Setup to measure dispersion power penalty of single-mode
ber. ..
..
...................
.3-7
3-3. Setup for optimizing laser extinction ratio
..........3-12
3-4. Setup for measuring eye diagram by triggering from recovered
clock. . .......................3-14
4-1. Agilent 83446A/B block diagram. .............4-5
4-2. Laser transmitter setup
.................
.4-12
4-3. Agilent 83446A/B test equipment setup
...........4-16
4-4. Wiring diagram for the line module
.............4-28
4-5. Wiring Diagram for the power supply terminals
.......4-30
4-6. Agilent 83446A/B assembly level replaceable parts
......4-34
4-7. Agilent 83446A/B replaceable hardware
...........4-36
Contents-3

T
ables
1-1. Agilent 83446A/B Specications and Characteristics .....1-10
1-2. Static-Safe A
ccessories ..................1-14
2-1. Agilent 83446A/B Power Requirements ..........2-7
2-2. Agilent T
echnologies Service Numbers ...........2-18
3-1. Average Gating P
eriod to A
chieve 100 Errors ........3-5
4-1. Required T
ools .................. .. . 4-4
4-2. V
oltages on the DC P
ower Supply T
erminals ........ 4-7
4-3. Required T
est Equipment ................. 4-11
4-4. Laser Transmitter Setup .................4-13
4-5. Sensitivity T
est Setup ..................4-17
4-6. Input Optical Return Loss ..... .. .........4-24
4-7. T
orque V
alues . ...................
.. 4-27
4-8. Line Module to DC P
ower Supply Connections .......4-29
4-9. DC Power Supply T
erminal Connections ..........4-30
4-10. Assembly-Level Replaceable P
arts .............4-35
4-11. Replaceable Hardware . .................4-37
Contents-4

1
General Information

General Information
What you'll nd in this chapter

Abrief description of the Agilent 83446A/B lightwave clock/data receiver.

Alist of options and accessories available
.

Agilent 83446A/B specications and characteristics.

Information about the lightwave receiver's serial number label.

Information about avoiding damage to the instrument from electrostatic discharge
.
1-2

Description of the Agilent 83446A/B
The Agilent 83446A/B lightwave clock/data receivers are designed to extract
clock and data information from digitally modulated lightwave signals
.They
operate at the following SONET/SDH rates:
Agilent 83446A
::::::::::::::::::::::
::
::
:::::::::::::::::::::
2.48832 Gb/s
Agilent 83446B
::::::::::::::::::::::
::
:::: :::::::::::::::::::
: 622.08 Mb/s
Both receivers have been designed per the recommendations of ITU-T G.957,
G.958, and Bellcore GR-253-CORE for the 1310/1550 nanometer wavelength
ranges
.Outputs
are optimized for use with bit-error-ratio testers
,such as the
Agilent 71604B
.
Select optical or
electrical input
An input on the rear panel is provided for recovering clock and data from an
electrical signal at the specied data rate
.Aslide switch on the rear panel
selects between the front panel optical input and the rear panel electrical
input. F
or best sensitivity
,signals should not be applied to both the front and
rear panel inputs simultaneously
.
Monitor the quality of
the analog eye
The auxiliary output on the front panel can be used to monitor the quality of
the analog eye
.When monitoring an optical signal this output is gain-limited
by the A
GC amplier and its level is constant for input signals above
approximately
0
23 dBm. When monitoring an electrical signal this output is
not gain-limited so its level is directly proportional to the incoming signal
level.
NOTE
This auxiliary ouput on the front panel is intended for monitoring purposes only and should not be
used for rigorous e
ye mask compliance testing. The frequenc
yresponse of the auxiliary output does
not conform to the requirements for e
ye mask testing as described in ITU-T G.957 and Bellcore
GR-253-CORE. F
or mask testing use an appropriate reference receiver
, such as the Agilent 83440-series
reference receivers.
1-3

General Information
Description of the Agilent 83446A/B
F
or more information on using the lightwave clock/data receiver refer to
Chapter 3.
Learning the inside
story ...
The block diagram for the Agilent 83446A/B is shown in Figure 1-1.
The optical-to-electrical conversion is performed by asensitive APD
photodetector which covers the 1310 and 1550 nm wavelength ranges
.
The optical input uses 50

mmultimode ber for compatability with either
single-mode or multimode ber inputs
.(A slight loss in sensitivity results
when used with 62.5

mber
.) The photodetector output is amplied in an
automatic-gain-control (A
GC) amplier and, after going through the MMIC
switch, is split into two paths
.One path provides an auxiliary output on the
receiver's front panel. The other path goes to the clock and data recovery
hybrid. The clock signal is recovered using aphase and frequency-locked loop
circuit. The data is threshhold-detected and re-timed to the recovered clock
signal. Clock and data outputs are noninverting with respect to the incoming
signal. The phase relationship between the two outputs at the front panel
interface is maintained to approximately
6
0.25 unit intervals
.
Figure 1-1. Agilent 83446A/B block diagram.
1-4

General Information
Description of the Agilent 83446A/B
Accessories supplied
The 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 Receiver User and Service Guide
.
Options
The following option is available:
Option 010 Deletes FC/PC front-panel connector interface
The
Fiber Optics Handbook
, Agilent part number 5952-9654, is an
introduction and reference for ber-optic measurements
.
Serial Numbers
Agilent Technologies makes frequent improvements to its products to enhance
their performance, usability, or reliability
, and to control costs
.Agilent
T
echnologies service personnel have access to complete records of design
changes to each type of equipment, based on the equipment's serial number
.
Whenever you contact Agilent T
echnologies about your lightwave receiver
,
have the complete serial number available to ensure obtaining the most
complete and accurate information possible
.
Aserial-number label is attached to the rear of the lightwave receiver
.
It contains the serial number and the options installed in the lightwave
receiver
.Whenever you specify the serial number or refer to it in obtaining
information about your lightwave receiver
,be sure to use the complete
number
.
1-5

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

General Information
Description of the Agilent 83446A/B
1. Line switch.
2. P
owerline LED
.
3.
CLOCK OUT
connector
.Output is nominally 2.48832 GHz (622.08 MHz
for Agilent 83446B). When the
SYNC LOSS
indicator is extinguished this
output is synchronized with the bit rate of the input signal. When not
synchronized to an input signal the output free-runs near the nominal
clock frequency
.
4.
SYNC LOSS
indicator
.This LED is o whenever the clock output is
synchronized to the bit rate of the input signal. Note that
CLOCK OUT
can
remain synchronized to input signals several dB below the onset of errors
at
DATA OUT.
5.
DATA OUT
connector
.This output provides an amplied, retimed signal
corresponding to the incoming data stream. Data transitions are aligned to
clock transitions to
6
0.25 unit intervals
.
6.
AUXILIARY OUT
connector
.This output provides anon-retimed analog
version of the input signal. When used with an optical input this port
is amplitude stabilized for input signals greater than approximately
0
23 dBm. When used with an electrical input this output is not amplitude
stabilized so its output amplitude is directly proportional to the amplitude
of the incoming signal.
7.
REAR PANEL INPUT
indicator
.This LED is on when the input selector
switch on the rear panel is set to the
REAR position.
8.
OPTICAL IN
connector
.Maximum signal input is
0 9dBm, damage level
input is +10 dBm. This input accepts any of the connector interface
adapters from the Agilent 81000-series
.
1-7