Tektronix ORR24 User manual

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Instruction Manual
ORR24
Optical Reference Receiver
071-0060-00
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Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
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WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this
warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor,
or will provide a replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time
or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS
OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR
THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
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Service Assurance
If you have not already purchased Service Assurance for this product, you may do so at any time during the
product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your
needs.
Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to
three years of Repair Protection.
Calibration Services provide annual calibration of your product, standards compliance and required audit
documentation, recall assurance, and reminder notification of scheduled calibration. Coverage begins upon
registration; you may purchase up to five years of Calibration Services.
Service Assurance Advantages
H Priced well below the cost of a single repair or calibration
H Avoid delays for service by eliminating the need for separate purchase authorizations from your company
H Eliminates unexpected service expenses
For Information and Ordering
For more information or to order Service Assurance, contact your Tektronix representative and provide the
information below. Service Assurance may not be available in locations outside the United States of America.
Name VISA or Master Card number and expiration
Company date or purchase order number
Address Repair Protection (1,2, or 3 years)
City, State, Postal code Calibration Services (1,2,3,4, or 5 years)
Country Instrument model and serial number
Phone Instrument purchase date
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ORR24 Instruction Manual i
Table of Contents
General Safety Summary ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Optical Connectors 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Signals 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuating Optical Signals 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Zero 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Conversion Gain 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noise Equivalent Power 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time and HF Aberrations 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth/Frequency Response 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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ii ORR24 Instruction Manual
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
Do Not Operate With SuspectedFailures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/DampConditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
To Avoid Fire or
Personal Injury
Symbols and Terms
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General Safety Summary
ORR24 Instruction Manual iii
Symbols on the Product. The following symbols appear on the product:
CAUTION
Refer to Manual
CAUTION
Static Sensitive
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iv ORR24 Instruction Manual
Contacting Tektronix
Phone [phone]*
Address Tektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web site www.tektronix.com
Sales support 1-800-833-9200, select option 1*
Servicesupport 1-800-833-9200, select option 2*
Technicalsupport Email: [email protected]
1-800-833-9200, select option 3*
1-503-627-2400
6:00 a.m. – 5:00 p.m. Pacific time
*This phone number is toll free in North America. After office hours, please leave a
voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.
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ORR24 Instruction Manual 1
Getting Started
The ORR24 is an optical reference receiver that is precisely calibrated in the
frequency domain for the SONET/SDH data rate of 2.488 Gb/s
(STM-16/OC-48). The ORR24 reference receiver installs in the front panel
compartment of a Tektronix 11800 Series Digital Sampling Oscilloscope
(including the SM-11 Multichannel Unit) or Tektronix CSA 803 Communica-
tions Signal Analyzer. Along with the appropriate sampling head, the ORR24
reference receiver and the CSA 803 or 11800 series instruments can test the
compliance of optical signals to specific SONET/SDH standards. An optional
stand-alone power supply is also available for the ORR24 Optical Reference
Receiver (see page 21).
Figure 1 shows the front panel of the ORR24 Optical Reference Receiver.
Optical signal
input connector
(FC/PC)
Screw lock knob
Electrical signal
output connector
(SMA)
GreenLED(power)
Figure 1: ORR24 Front Panel
The ORR24 Optical Reference Receiver has an FC/PC receptacle for optical
signal input and a precision 3.5 mm connector for electrical signal output.
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Getting Started
2ORR24 Instruction Manual
The following list highlights the key performance characteristics of the ORR24
Optical Reference Receiver:
H 1000 to 1650 nm wavelength response
H 2.0 GHz Minimum Transducer Bandwidth
H Fourth order Bessel-Thompson, 2.488 Gb/s frequency response
H Greater than 0.5 V/mW DC conversion gain at 1310 and 1550 nm
For a complete list of specifications, see page 10.
Standard Accessories
The following accessories are standard with every ORR24 Optical Reference
Receiver:
H Hard case
H Instructions
H FC/PC to FC/PC 9 m m single-mode fiber jumper
H FC/ST, FC/SC, and FC/FC hybrid connectors
H Coaxial Cable (SMA-to-SMA, 50 W, 2 ns delay)
H SMA terminator
H Certificate of traceable calibration
H Frequency response graph
For a list of replaceable part numbers, see page 19.
Options
The following options are available at the time of purchase:
H Opt 95 Calibration data
H Opt C3 Three years calibration services
H Opt R3 Three years extended warranty
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Getting Started
ORR24 Instruction Manual 3
Optional Accessories
The following recommended accessories are available through Tektronix:
H Fiber-optic cables and adapters with a variety of fiber types and connector
styles
H 90/10 single-mode optical splitter with FC/PC connectors
H DIN to FC fibre optic hybrid connector
H 10 dB in-line single-mode optical attenuator
H Stand-alone power supply
For a list of part numbers, see page 19.
Installation
Follow the instructions in this section to install the ORR24 Optical Reference
Receiver into the Tektronix 11800 Series Digital Sampling Oscilloscope or
CSA 803 Communications Signal Analyzer or to connect it to the optional power
supply for stand-alone operation.
CAUTION. The output of the Optical Reference Receiver and the input of the
sampling head are subject to damage from electrostatic discharge (ESD). To
prevent damage from ESD, take the following precautions:
Always wear an anti-static wrist strap when handling a static sensitive
instrument.
Keep the 50 W termination in place when moving or storing the instrument.
Remove the termination only to connect a cable.
Discharge the inner conductor of a loose, unterminated cable before connecting
it to the instrument.
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Getting Started
4ORR24 Instruction Manual
On the Tektronix 11800 Series Digital Sampling Oscilloscope or the CSA 803
Communications Signal Analyzer, the ORR24 Optical Reference Receiver
installs into any of the front panel compartments.
NOTE. To guarantee compliance with OC-48 boundary limits, you must connect
the ORR24 Optical Reference Receiver to the input of an SD-22 sampling head
using the 015-0560-00 cable provided. The ORR24 is designed for the electrical
characteristics of the cable and the particular frequency response and low noise
of the SD-22.
Use the following procedure to install the Optical Reference Receiver and
sampling head modules:
1. Switch off the measurement instrument.
2. Place the module in a compartment and slowly push it in with firm pressure.
3. Once the module is seated, turn the screw shaft on the plug-in to tighten the
module in place.
4. Switch on the measurement instrument and check that all modules have
power.
5. Follow anti-static precautions and connect the output of the Optical
Reference Receiver to the input of the sampling head with the 015-0560-00
cable provided:
a. Align the SMA connectors carefully.
b. Use light, finger pressure to turn the nut. Do not turn the cable.
c. Tighten the nut lightly with a wrench. For best repeatability and to
prolong the life of SMA connectors, use a torque wrench and tighten
the connection to the range of 7 to 10 lb-in (79 to 112 N-cm).
11800 or CSA 803 Series
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Getting Started
ORR24 Instruction Manual 5
NOTE. On the CSA803 series, the Optical Reference Receiver will work in any of
the power-only or sampling head compartments, but the sampling head must be
installed in one of the two sampling head compartments on the right. See
Figure 2.
ORR24 or
sampling head
ORR24 only
(power-only
compartments)
Figure 2: Front panel compartments in a CSA803 CommunicationsSignal Analyzer
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Getting Started
6ORR24 Instruction Manual
The optional power supply kit (Figure 3) permits stand-alone operation. The part
number for the kit is on page 21.
NOTE. To guarantee compliance with OC-48 boundary limits, you must connect
the ORR24 Optical Reference Receiver to the input of an SD-22 sampling head
using the 015-0560-00 cable provided. The ORR24 is designed for the electrical
characteristics of the cable and the particular frequency response and low noise
of the SD-22.
Figure 3: Installation with optional power supply kit
Optional Power Supply
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ORR24 Instruction Manual 7
Operating Basics
Figure 1 shows the front panel of the ORR24 Optical Reference Receiver. The
ORR24 Optical Reference Receiver has an FC/PC receptacle for optical signal
input and a precision 3.5 mm connector for electrical signal output.
Handling
Handle the ORR24 Optical Reference Receiver carefully at all times.
CAUTION. To avoid damaging the ORR24 Optical Reference Receiver, take the
following precautions:
Do not drop the Optical Reference Receiver since damage and misalignment of
the photodiode optical assembly can result. Store the Optical Reference Receiver
in a secure location when not in use.
Replace the protective caps on the input and output connectors when the Optical
Reference Receiver is not in use.
Cleaning Optical Connectors
Small dust particles and oils can easily contaminate optical connectors and
reduce or block the signal. Take care to preserve the integrity your connectors by
keeping them free of contamination.
CAUTION. To prevent loss of optical power or damage to the optical connectors,
keep the connectors clean at all times.
When cleaning the connectors with a swab, use gentle circular motions. Use only
high quality cleaning supplies that are non-abrasive and leave no residue.
To reduce the need for cleaning, immediately replace protective caps on the
optical connectors when not in use.
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Operating Basics
8ORR24 Instruction Manual
Use the following items to clean the optical connectors:
H clean compressed air
H fiber-optic cleaning swabs
H isopropyl alcohol
To clean the optical connectors, follow these steps:
1. Hold the can of compressed air upright and spray the can into the air to purge
any propellant.
2. Spray the clean compressed air on the connectors to remove any loose
particles or moisture.
3. Moisten a clean optical swab with isopropyl alcohol then lightly swab the
surfaces of the connectors.
4. Spray the clean compressed air on the connectors again to remove any loose
particles or isopropyl alcohol.
NOTE. Cleaning kits for optical connectors are available from a number of
suppliers.
Connecting Signals
Attach the fiber optic cable with an FC/PC connector to the FC/PC input
receptacle as follows:
1. Carefully align the keyway on the receptacle with the key on the connector.
2. Tighten the nut lightly with finger pressure only.
The input of the ORR24 Optical Reference Receiver can couple to optical fibers
with a core diameter of up to 9 m m. Alternate types can be coupled by use of an
FC-FC jumper and the FC-FC, FC-ST, FC-SC adapters. (Refer to Optional
accessories on page 21.)
CAUTION. To maintain the high performance (low return loss) of the reference
receiver, connect an adapter and cable between the input of the reference
receiver and the device under test. When you make connections to other devices,
leave the adapter and cable in place to protect the optical connector of the
reference receiver from wear.
Equipment Required
Procedure
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Operating Basics
ORR24 Instruction Manual 9
If you connect fiber cores larger than 9 m m, the reference receiver may still
couple light, but the mismatch in core diameter will cause lower conversion gain
and high insertion loss.
Attenuating Optical Signals
When using the ORR24 as a reference receiver, it may be necessary to attenuate
the optical signals.
CAUTION. To avoid damaging the optical input of the ORR24, attenuate optical
signals to less than 5 mW average power or 10 mW peak power at the wave-
length with highest relative responsivity.
For linearity and measurement accuracy, attenuate the peak-to-peak swing of
signal to within the specified performance of 200 m Wp-p.
Example:
1. You want to look at an OC-48 eye-pattern signal whose average power
(un-attenuated) is about +2 dBm. The average optical power of the +2 dBm
signal is equal to 1584 m W.
2. For optical signals with a 50% duty cycle , the average power is
approximately one half of the peak-to-peak swing for high extinction ratio
signals. This means that the peak-to-peak value of the optical signal is
approximately
2 x 1584 m W = 3168 m Wp-p
3. To lower the signal to within the 200 m W range, the signal must be
attenuated by 3168 m W / 200 m W = 15.84; this is equal to about 12 dB of
optical attenuation.
To attenuate the optical signal to the proper level, use a Tektronix OA5002
Optical Attenuator.
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10 ORR24 Instruction Manual
Specifications
This section contains the specifications of the ORR24 Optical Reference
Receiver. All specifications are guaranteed unless noted as “typical.” Typical
specifications are provided for your convenience but are not guaranteed.
Specifications marked with the n symbol have corresponding checks in the
Performance Verification section on page 12.
Table 1: ORR24 Specifications
Specification Description
Effectivewavelength range, typical 1000 nm to 1650 nm
n DCconversiongain ≥0.500 V / mW at 1310 nm ±20 nm and 1550 nm ±20 nm
DC conversion gain, typical > 0.850 V / mW at 1310 nm ±20 nm
Relative responsivity, typical See Figure 4
DC conversion gain linearity, typical < 3% deviation in DC conversion gain from 25 m W to 500 m W average optical input
relative to conversion gain with 250 m W average optical power input
Absolutemaximumnondestructive optical
input 5 mW average power; 10 mW peak power at wavelength with highest relative responsivity
n Bandwidth DC to 2.0 GHz (≥– 6 dB electrical output into 50
W )
FrequencyResponse
( +20 _ C to +35 _ C) Scalar frequency response of optical-to-electrical conversion (as measured at the electrical output) falls within the SONET OC-48 and SDH STM-16, 2.488 Gb/s industry
standards(Bessel-Thompsonreferencereceiver boundary limits)1
Maximumnon-saturatinglinearresponseto
transientinput The transient optical signal response is linear (±5%) up to 100
m W average optical
power and < 200 m Wp-p optical power for both 1310 nm ±20 nm and 1550 nm ±20 nm.
Linearity is relative to 200 m Wp-p step response
InternalFiberdiameter core: 9 m msingle-modefiber
cladding: 125 m m
Fiberconnectorstyle femaleFC/PC
Optical return loss > 30 minimum when external mating fiber is also PC style.
n Noiseequivalentpower ≤15 pW
ń Hz
Ǹ
electrical output noise when terminated into 50 W
n Rise time ≤205 ps
n Aberrations ≤5%p-p total
n Outputzero ≤±1.0 mV at 20
_ C to 30 _ C and ≤±3.0 mV outside this range (optical input must be
zero)
ExternalTermination impedance 50 W ±2 W
1A 4th order Bessel Thompson response for a SONET/SDH 2.488 Gb/s data rate receiver should have a nominal –3 dB at
1.8666 GHz and –5.7 dB at 2.488 GHz.
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Specifications
ORR24 Instruction Manual 11
Table 1: ORR24 Specifications (cont.)
Specification Description
Temperature Operating:+10 _ C to +40 _ C
(frequency response is only guaranteed from +20 _ C to +35 _ C)
Non-operating:–55 _ C to +75 _ C
Humidity 75%non-condensing
Altitude Operating: 4,572 m (15,000 ft)
Non-operating:15,240m(50,000ft)
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1000 1200 1400 1600
Wavelength (nanometers)
Relative conversion gain
Figure 4: ORR24 relative responsivity (normalized to 1310 nm)
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