Agilent Technologies 83400 Series User manual

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Agilent 83400-Series
Lightwave Source and
Receiver Modules
User’s Guide

ii
© Copyright 2000
Agilent Technologies
All Rights Reserved. Repro-
duction, adaptation, or trans-
lation without prior written
permission is prohibited,
except as allowed under copy-
right laws.
Agilent Part No. 5962-5933
Printed in USA
February 2000
Agilent Technologies
Lightwave Division
1400 Fountaingrove Parkway
Santa Rosa, CA 95403-1799,
USA
[phone]
Notice.
The information contained in
this document is subject to
change without notice. Com-
panies, names, and data used
in examples herein are ficti-
tious unless otherwise noted.
Agilent Technologies makes
no warranty of any kind with
regard to this material, includ-
ing but not limited to, the
implied warranties of mer-
chantability and fitness for a
particular purpose. Agilent
Technologies shall not be lia-
ble for errors contained herein
or for incidental or conse-
quential damages in connec-
tion with the furnishing,
performance, or use of this
material.
Restricted Rights Legend.
Use, duplication, or disclo-
sure by the U.S. Government
is subject to restrictions as set
forth in subparagraph (c) (1)
(ii) of the Rights in Technical
Data and Computer Software
clause at DFARS 252.227-7013
for DOD agencies, and sub-
paragraphs (c) (1) and (c) (2)
of the Commercial Computer
Software Restricted Rights
clause at FAR 52.227-19 for
other agencies.
Warranty.
This Agilent Technologies
instrument product is war-
ranted against defects in
material and workmanship for
a period of one year from date
of shipment. During the war-
ranty period, Agilent Technol-
ogies will, at its option, either
repair or replace products
which prove to be defective.
For warranty service or repair,
this product must be returned
to a service facility desig-
nated by Agilent Technolo-
gies. Buyer shall prepay
shipping charges to Agilent
Technologies and Agilent
Technologies shall pay ship-
ping charges to return the
product to Buyer. However,
Buyer shall pay all shipping
charges, duties, and taxes for
products returned to Agilent
Technologies from another
country.
Agilent Technologies war-
rants that its software and
firmware designated by Agi-
lent Technologies for use with
an instrument will execute its
programming instructions
when properly installed on
that instrument. Agilent Tech-
nologies does not warrant that
the operation of the instru-
ment, or software, or firmware
will be uninterrupted or error-
free.
Limitation of Warranty.
The foregoing warranty shall
not apply to defects resulting
from improper or inadequate
maintenance by Buyer, Buyer-
supplied software or interfac-
ing, unauthorized modifica-
tion or misuse, operation
outside of the environmental
specifications for the product,
or improper site preparation
or maintenance.
No other warranty is
expressed or implied. Agilent
Technologies specifically dis-
claims the implied warranties
of merchantability and fitness
for a particular purpose.
Exclusive Remedies.
The remedies provided herein
are buyer's sole and exclusive
remedies. Agilent Technolo-
gies shall not be liable for any
direct, indirect, special, inci-
dental, or consequential dam-
ages, whether based on
contract, tort, or any other
legal theory.
Safety Symbols.
CAUTION
The caution sign denotes a
hazard. It calls attention to a
procedure which, if not cor-
rectly performed or adhered
to, could result in damage to
or destruction of the product.
Do not proceed beyond a cau-
tion sign until the indicated
conditions are fully under-
stood and met.
WARNING
The warning sign denotes a
hazard. It calls attention to a
procedure which, if not cor-
rectly 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.
The instruction man-
ual symbol. The prod-
uct is marked with this
warning symbol when
it is necessary for the
user to refer to the
instructions in the
manual.
The laser radiation
symbol. This warning
symbol is marked on
products which have a
laser output.
The AC symbol is used
to indicate the
required nature of the
line module input
power.
|The ON symbols are
used to mark the posi-
tions of the instrument
power line switch.
❍The OFF symbols
are used to mark the
positions of the instru-
ment power line
switch.
The CE mark is a reg-
istered trademark of
the European Commu-
nity.
The CSA mark is a reg-
istered trademark of
the Canadian Stan-
dards Association.
The C-Tick mark is a
registered trademark
of the Australian Spec-
trum Management
Agency.
This text denotes the
instrument is an
Industrial Scientific
and Medical Group 1
Class A product.
Typographical Conven-
tions.
The following conventions are
used in this book:
Key type for keys or text
located on the keyboard or
instrument.
Softkey type for key names that
are displayed on the instru-
ment’s screen.
Display type for words or
characters displayed on the
computer’s screen or instru-
ment’s display.
User type for words or charac-
ters that you type or enter.
Emphasis type for words or
characters that emphasize
some point or that are used as
place holders for text that you
type.
ISM1-A

iii
The Agilent 83400-Series—At a Glance
The Agilent 83400-Series—At a Glance
Agilent 83400-series sources
The Agilent 83400-series sources can be amplitude modulated by an external
RF source. They can be modulated with up to +14 dBm (about 25 mW) of RF
power.
WARNING Use of controls or adjustments or performance of procedures other
than those specified herein can result in hazardous radiation
exposure.
WARNING Do not enable the laser when no fiber or equivalent device is attached
to the OPTICAL OUTPUT connector.
Agilent 83400-series receivers
The receivers are used to demodulate lightwave signals. With no modulation
signal, lightwave receivers produce no electrical output. If the optical power
exceeds 3 mW, the front-panel OVER ILLUMINATION indicator lights. Power must
be decreased below 2.5 mW for the indicator to turn off.
Source Wavelength Unmodulated
Output Power
Modulation
Range
Optical
Fiber
Laser
Type
83402C 1300 nm < 3.0 mW 300 kHz to 6 GHz 9/125 µmDFB
83403C 1550 nm < 3.0 mW 300 kHz to 6 GHz 9/125 µmDFB
Receiver Wavelength Demodulation Range
(sine wave) Optical Fiber
83410C 1300/1550 nm 300 kHz to 3 GHz 62.5/125 µm
83411C/D 1300/1550 nm 300 kHz to 6 GHz 9/125 µm
83412B 850 nm 300 kHz to 3 GHz 62.5/125 µm

iv
Laser Classification
Laser Classification
The Agilent 83402C is classified as an FDA Laser Class IIIb (IEC Laser
Class 3B). The total power of light energy radiated out of the OPTICAL OUTPUT
connector is no greater than 5 mW at a wavelength of 1300 nm. The following
figure shows the IEC and FDA labels (and their placement) on the
Agilent 83402C.
The Agilent 83403C is classified as an FDA LASER Class I (IEC LASER Class
1). The total power of light energy radiated out of the OPTICAL OUTPUT connec-
tor is no greater than 5 mW at a wavelength of 1550 nm.
No adjustments or maintenance are required to keep these products compli-
ant with their classification. The IEC labels shown in the figure could not be
affixed at the factory. Instructions on page 1-5 explain how they are to be
attached.
WARNING Do NOT, under any circumstances, look into the optical output or any
fiber/device attached to the output while the laser is in operation.
WARNING Do not enable the laser when no fiber or equivalent device is attached
to the OPTICAL OUTPUT connector.
These products cannot be serviced. If service is required, return the instru-
ment to Agilent Technologies.

v
Laser Classification
IEC and FDA labels (and their placement) on an Agilent 83402C

vi
General Safety Considerations
General Safety Considerations
This product has been designed and tested in accordance with IEC Publica-
tion 61010-1, Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use, and has been supplied in a safe condition. The
instruction documentation contains information and warnings that must be
followed by the user to ensure safe operation and to maintain the product in a
safe condition.
WARNING If this instrument is not used as specified, the protection provided by
the equipment could be impaired. This instrument must be used in a
normal condition (in which all means for protection are intact) only.
WARNING To prevent electrical shock, disconnect the Agilent 83400-Series from
mains before cleaning. Use a dry cloth or one slightly dampened with
water to clean the external case parts. Do not attempt to clean
internally.
WARNING This is a Safety Class 1 product (provided with a protective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
product is likely to make the product dangerous. Intentional
interruption is prohibited.
WARNING No operator serviceable parts inside. Refer servicing to qualified
personnel. To prevent electrical shock, do not remove covers.
WARNING For continued protection against fire hazard, replace line fuse only
with same type and ratings, (type T 0.315A/250V for 100/120V
operation and 0.16A/250V for 220/240V operation). The use of other
fuses or materials is prohibited. Verify that the value of the line-
voltage fuse is correct.
•For 100/120V operation, use an IEC 127 5×20 mm, 0.315 A, 250 V, Agilent
part number 2110-0449.
•For 220/240V operation, use an IEC 127 5×20 mm, 0.16 A, 250 V, Agilent
Technologies part number 2110-0448.

vii
General Safety Considerations
CAUTION Before switching on this instrument, make sure that the line voltage selector
switch is set to the line voltage of the power supply and the correct fuse is
installed. Assure the supply voltage is in the specified range.
CAUTION This product is designed for use in Installation Category II and Pollution
Degree 2 per IEC 1010 and 664 respectively.
CAUTION VENTILATION REQUIREMENTS: When installing the product in a cabinet, the
convection into and out of the product must not be restricted. The ambient
temperature (outside the cabinet) must be less than the maximum operating
temperature of the product by 4°C for every 100 watts dissipated in the
cabinet. If the total power dissipated in the cabinet is greater than 800 watts,
then forced convection must be used.
CAUTION Always use the three-prong ac power cord supplied with this instrument.
Failure to ensure adequate earth grounding by not using this cord may cause
instrument damage.
CAUTION Do not connect ac power until you have verified the line voltage is correct.
Damage to the equipment could result.
CAUTION This instrument has autoranging line voltage input. Be sure the supply voltage
is within the specified range.

Contents
Contents-1
The Agilent 83400-Series—At a Glance iii
Laser Classification iv
1 Getting Started
Inspecting the Shipment 1-4
Connecting a Source 1-5
Connecting a Receiver 1-8
Entering Calibration Data into an Agilent 8702D 1-9
Entering Calibration Data into an Agilent 8702A/B 1-11
2 General Information
Operating 2-2
Replaceable Parts 2-5
Front-Panel Optical Adapters 2-6
Calibration Data Information 2-7
Cleaning Connections for Accurate Measurements 2-11
Theory of Operation 2-21
Returning the Instrument for Service 2-25
Agilent Technologies Service Offices 2-28
3 Specifications and Regulatory Information
Specifications for Sources 3-3
Specifications for Receivers 3-7
Operating Specifications for Sources and Receivers 3-13
Regulatory Information 3-14
4 Performance Tests
Tests for Sources 4-4
Tests for Receivers 4-7

1
Inspecting the Shipment 1-4
Connecting a Source 1-5
If you encounter a problem 1-7
Connecting a Receiver 1-8
Entering Calibration Data into an Agilent 8702D 1-9
To copy the data from the disk 1-10
To manually enter data from the label 1-10
Entering Calibration Data into an Agilent 8702A/B 1-11
To install from the front panel 1-11
To install from an external disk drive 1-12
Getting Started

1-2
Getting Started
Getting Started
Getting Started
The instructions in this chapter show you how to install your Agilent 83400-
series source or receiver module. Because these products are key accessories
for the Agilent 8702-series lightwave component analyzers, this book empha-
sizes installation into the Agilent 8702D.
Calibration data describes each device
Four procedures are provided in this chapter for loading source or receiver
calibration data into an Agilent 8702-series lightwave component analyzer.
Select the appropriate procedure depending upon your situation.
Each source and receiver module comes with its own calibration data that
describes its magnitude and phase modulation response. Because no two
sources or receivers are exactly alike, the calibration data should not be used
with any other source or receiver. The calibration data is provided in three
forms:
•Coefficients printed on a label.
•Data on a DOS-formatted disk.
•Data on a LIF-formatted disk.
For more information about the calibration data, refer to “Calibration Data In-
formation”on page 2-7.
Some notes on safety and care
Be sure to read the safety and introductory material in the front of this book
before operating your Agilent 83400-series source or receiver module. Refer
to Chapter 3, “Specifications and Regulatory Information”for information on
operating conditions, such as temperature.
If you should ever need to clean the cabinet, use a damp cloth only.

1-3
Getting Started
Getting Started
CAUTION Exposing the Agilent 83400-series source or receiver module to temperatures
above 55°C may cause the optical fiber in the front-panel connector to shrink
and retract.
CAUTION This product is designed for use in INSTALLATION CATEGORY II and
POLLUTION DEGREE 2, per IEC 601010 and 60664 respectively.
Measurement accuracy—it’s up to you!
Fiber-optic connectors are easily damaged when connected to dirty or damaged cables
and accessories. The Agilent 83400-series’ front-panel optical connector is no excep-
tion. When you use improper cleaning and handling techniques, you risk expensive
instrument repairs, damaged cables, and compromised measurements.
Before you connect any fiber-optic cable to the Agilent 83400-series source or receiver
module, refer to “Cleaning Connections for Accurate Measurements” on page 2-11.

1-4
Getting Started
Inspecting the Shipment
Inspecting the Shipment
1Verify that all components ordered have arrived by comparing the shipping
forms to the original purchase order. Inspect all shipping containers.
If your shipment is damaged or incomplete, save the packing materials and
notify both the shipping carrier and the nearest Agilent Technologies sales and
service office. Agilent Technologies will arrange for repair or replacement of
damaged or incomplete shipments without waiting for a settlement from the
transportation company. Notify the Agilent Technologies customer engineer of
any problems.
2Make sure that the serial number and options listed on the instrument’s rear-
panel label match the serial number and options listed on the shipping
document. The following figure is an example of the rear-panel serial number
label.
Figure 1-1. Serial number label

1-5
Getting Started
Connecting a Source
Connecting a Source
1For Agilent 83402C products, perform the following two steps:
aIf you are located outside of the United States or Canada, locate the yellow
sheet of IEC laser classification and laser safety labels supplied with the
source. Labels are provided for most major languages.
bSelect the two labels in the desired language, and place them on the source
at the two positions shown in Figure 1-2 on page 1-6. FDA labels should al-
ready be located at these positions.
WARNING Do NOT, under any circumstances, look into the optical output or any
fiber/device attached to the output while the laser is in operation.
2Connect a terminated fiber-optic cable or device to the source’s OPTICAL OUTPUT
connector. This protects the user from exposure to laser radiation. See
Figure 1-3 on page 1-7.
3Connect the DC cable, supplied with the source, between the source’s rear-
panel DC IN connector and a PROBE POWER jack.
You’ll find PROBE POWER jacks on the following products:
•Agilent 8702A/B/D lightwave component analyzer
•Agilent 11899A probe power supply
4Make sure that the BNC short is connect to the rear-panel REMOTE SHUTDOWN
connector.
The source will not operate without the BNC short connected.
5Insert the key into the source’s front panel.
6Turn the key to turn the source on.

1-6
Getting Started
Connecting a Source
Figure 1-2. Location of laser safety labels

1-7
Getting Started
Connecting a Source
Figure 1-3. Source connections
If you encounter a problem
If the TEMP LED comes on, or the LASER ON LED goes off, one or more of the fol-
lowing conditions may have occurred:
•The key switch is in the OFF position (O).
•The ambient temperature is out of the specified range (25°C ±5°C).
•The remote shutdown is open.
•The power supply voltage(s) are out of spec (–12.6 V ±5% and +15 V ±5%).
•There is an internal malfunction of the unit; contact Agilent Technologies for
assistance.
These products cannot be serviced. If service is required, return the instru-
ment to Agilent Technologies.

1-8
Getting Started
Connecting a Receiver
Connecting a Receiver
1Connect the DC cable, supplied with the receiver, between the receiver’s rear-
panel DC IN connector and a PROBE POWER jack.
You’ll find PROBE POWER jacks on the following products:
•Agilent 8702A/B/D lightwave component analyzer
•Agilent 11899A probe power supply
2Locate the SMA RF cable supplied with the receiver.
3Use adapters to connect the SMA RF cable between the Agilent 8702’s RF port
and the receiver’s rear-panel RF OUT connector.
4Connect a fiber-optic cable or device to the receiver’s OPTICAL INPUT connector.

1-9
Getting Started
Entering Calibration Data into an Agilent 8702D
Entering Calibration Data into an Agilent 8702D
Agilent 83400-series lightwave sources and receivers have calibration data
which must be entered into the Agilent 8702. The data is supplied on a disk
and printed on a label. The most accurate data is contained on the disk. The
calibration data for newer lightwave sources and receivers is supplied on a
DOS formatted disk which can be read using the front-panel disk drive. On
older sources and receivers, the disk uses the LIF format.
Calibration standards come in the following forms:
•Already loaded in the Agilent 8702’s memory.
For optical transmission measurements, a thru connection (short length of
fiber-optic cable) is used. For reflection measurements, a Fresnel reflection
(3.5% reflected power) is used. This is a clean connector on the output of a
lightwave coupler. For electrical measurements, standard devices include
short circuit, open circuit, termination (for example, 50Ωload), and thru
connection. Electrical standards are packaged together as calibration kits.
•Provided with the device and must be loaded into the Agilent 8702’s memory.
For example, the Agilent 83400-series lightwave sources and receivers are
shipped with calibration data stored on a disk. This disk must be placed into
the instrument’s front-panel disk drive so that the data can be loaded into
memory.
•Calibration standards that you create for your own devices.
Loading calibration data into an Agilent 8702D
Before using your source or receiver with an Agilent 8702D lightwave compo-
nent analyzer, you must load the calibration data as described in this section.
Two simple procedures are provided in this section. Although both are easy to
perform, copying from a disk is slightly faster. The data on the disk provides
the most accurate model of the frequency response of the calibration stan-
dard. As an alternative, entering the coefficients that are printed on the label
(located on the source or receiver) provides lower accuracy.
For steps on entering calibration data into an Agilent 8702A/B, refer to
“Entering Calibration Data into an Agilent 8702A/B”on page 1-11.