Tektronix ORR24 Instruction Manual Instruction Manual

Instruction Manual

ORR24
Optical Reference Receiver

071-0060-00

Copyright © Tektronix, Inc. All rights reserved. T ektronix 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.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.

WARRANTY

T ektronix 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, T ektronix, 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 T ektronix, 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 T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than T ektronix 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-T ektronix 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 CUST OMER 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.

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 T ektronix 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

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ORR24 Instruction Manual

i

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.

To Avoid Fire or
Personal Injury

Symbols and Terms

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 Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry .

T erms 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.

T erms 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.

ii

ORR24 Instruction Manual

General Safety Summary

Symbols on the Product. The following symbols appear on the product:

CAUTION

Static Sensitive

CAUTION

Refer to Manual

ORR24 Instruction Manual

iii

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*

Service support 1-800-833-9200, select option 2*

Technical support Email: [e-mail]

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.

iv

ORR24 Instruction Manual

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 Communica­tions 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.

Screw lock knob

Green LED (power)

Electrical signal
output connector
(SMA)

Optical signal

input connector

(FC/PC)

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.

ORR24 Instruction Manual

1

Getting Started

Standard Accessories

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.

The following accessories are standard with every ORR24 Optical Reference
Receiver:

H

Hard case

Options

H

Instructions

H

FC/PC to FC/PC 9 mm 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.

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

2

ORR24 Instruction Manual

Optional Accessories

Installation

Getting Started

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.

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.

ORR24 Instruction Manual

3

Getting Started

11800 or CSA 803 Series

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).

4

ORR24 Instruction Manual

Getting Started

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 CSA 803 Communications Signal Analyzer

ORR24 Instruction Manual

5

Getting Started

Optional Power Supply

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

6

ORR24 Instruction Manual

Operating Basics

Handling

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.

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.

ORR24 Instruction Manual

7

Operating Basics

Equipment Required

Procedure

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 mm. 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.

8

ORR24 Instruction Manual

If you connect fiber cores larger than 9 mm, 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 wave­length with highest relative responsivity.

For linearity and measurement accuracy, attenuate the peak-to-peak swing of
signal to within the specified performance of 200 mW

Example:

p-p

Operating Basics

.

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 mW.

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 mW = 3168 mW

3. To lower the signal to within the 200 mW range, the signal must be

attenuated by 3168 mW / 200 mW = 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.

p-p

ORR24 Instruction Manual

9

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.

T able 1: ORR24 Specifications

Specification Description

Effective wavelength range, typical 1000 nm to 1650 nm

n

DC conversion gain

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 mW to 500 mW average optical input

Absolute maximum nondestructive optical
input

n

Bandwidth

Frequency Response
( +20_ C to +35_ C)

Maximum non-saturating linear response to
transient input

Internal Fiber diameter core: 9 mm single-mode fiber

Fiber connector style female FC/PC
Optical return loss > 30 minimum when external mating fiber is also PC style.

≥ 0.500 V / mW at 1310 nm ± 20 nm and 1550 nm ± 20 nm

relative to conversion gain with 250 mW average optical power input
5 mW average power; 10 mW peak power at wavelength with highest relative

responsivity
DC to 2.0 GHz (≥ – 6 dB electrical output into 50 W)
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-Thompson reference receiver boundary limits)

The transient optical signal response is linear (± 5%) up to 100 mW average optical
power and < 200 mW
Linearity is relative to 200 mW

cladding: 125 mm

optical power for both 1310 nm ± 20 nm and 1550 nm ± 20 nm.

p-p

step response

p-p

1

n

Noise equivalent power

n

Rise time

n

Aberrations

n

Output zero

External Termination impedance 50 W ± 2

1

A 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.

10

≤ 15 pWńHzǸelectrical output noise when terminated into 50

≤ 205 ps
≤ 5%

total

p-p

≤ ± 1.0 mV at 20_ C to 30_ C and ≤ ± 3.0 mV outside this range (optical input must be
zero)

W

W

ORR24 Instruction Manual

T able 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: 15,240 m (50,000 ft)

1.10

1.00

0.90

0.80

Specifications

0.70

0.60

Relative conversion gain

0.50

0.40

0.30
1000 1200 1400 1600

Wavelength (nanometers)

Figure 4: ORR24 relative responsivity (normalized to 1310 nm)

ORR24 Instruction Manual

11

Performance Verification

Use the following procedures to verify the specifications of the ORR24 Optical
Reference Receiver. Before beginning these procedures, see page 18 and
photocopy the test record and use it to record the performance test results. The
recommended verification interval is one year.

These procedures test the following specifications:

H

Noise equivalent power

H

Output zero

H

DC conversion gain

H

Rise time

H

HF Aberrations

H

Bandwidth/Frequency Response

Equipment Required

Table 2 lists the equipment required to perform the performance verification
procedure. The types and quantities of connectors may vary depending on the
specific equipment you use.

T able 2: Test equipment

Description Minimum requirements Example product

Optical power meter with
head and adapters

1310 nm cal source output > 200 mW1,

1550 nm cal source output > 200 mW (CW)1,

RF power meter noise < .1 mV , BW > 4 GHz HP 436A with power sensor

Accuracy > 2.5%, resolution >
5 pW, Max power > 1 mW, cali­brated from 700 nm – 1600 nm

stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

HP 8153A with
HP 811532 head

Rifocs 665R–PO

Rifocs 666R–PO

HP 8484A

12

ORR24 Instruction Manual

T able 2: Test equipment (cont.)

Description Example productMinimum requirements

1300 or 1550 nm impulse
generator

pulse width < 6 ps Clark MXR ErF

Performance Verification

t

picosecond 1550 laser

Sampling oscilloscope with
sampling head

SMA-to-SMA cable 50 W with 2 ns delay 015-0560-00
PC with GPIB port and

printer
Adjustable single-mode

optical attenuator
Digital voltmeter 4 1/2 digit Keithley 2000 or

50 W termination ± 1% 01 1-0049-01
BNC-to-banana adapter BNC female to dual banana 103-0090-00
Optical cable FC-FC multimode, 9 mm, 2 meters 174-1910-00
Inline optical adapter FC female to FC female 131-5039-00
Low-pass filter 1 GHz Mini Circuits SLP 1000

1

CW and modulated mode available: modulation with OFF level at or below 0.1 mW,
optical falltime < 1 ms

printer output of sampled wave­forms

4 decades, 9 mm core fiber, FC­style connectors

11800 series or CSA800
series with SD-22 sampling
head)

T ektronix OA5002

T ektronix DMM916

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.

Output Zero

ORR24 Instruction Manual

The reference receiver under test and the test equipment and should be warmed
up for 20 minutes at an ambient temperature between 20 and 30_ C.

1. Attach the output of the ORR24 to the voltmeter inputs with a 50

W

termination and BNC-to-banana adapter.

2. Install the optical dust cover on the input of the ORR24.

3. Check that output voltage is ≤ ± 1 mV. Record the result on the test record.

13

Performance Verification

DC Conversion Gain

NOTE. Make sure that the optical connector ends of both the fiber from the
optical attenuator output and the ORR24 under test input fiber are well cleaned
before performing this step. See the cleaning instructions on page 7.

1. Connect the 1310 nm laser source to the input of the optical attenuator.

NOTE. The longer wavelengths of 1310 nm and especially 1550 nm in single
mode fiber are sensitive to loss in fiber due to bending of the fiber. The fiber
bend radius of the ORR24 fiber input should lay with >1.5 inch bend radius
along the fiber’s entire length. Although this precaution must be maintained
throughout the entire performance verification procedure, it is especially
important for this step in order to accurately adjust and measure the DC
conversion gain of the ORR24.

2. Connect the optical attenuator output to the optical power meter using single

mode optical cable with FC connectors. Use the appropriate optical power
meter sensing head with calibrated measurement for a wavelength span
including 1310 nm and 1550 nm. Be sure the optical power meter wave­length setting and optical attenuator setting is at 1310 nm. Enable the optical
output.

3. Adjust attenuator or the optical source so that the optical power meter reads

200mW.

4. Move the FC fiber end (the one now adjusted to 200 mW average power)

from the optical power meter and connect it to the ORR24 input under test.

5. Attach voltmeter with 50 W termination to ORR24 output.

6. Record the voltmeter reading. The 1310 nm conversion gain in units of

V/mW is

(voltmeter reading) × 5

7. Record the 1310 nm conversion gain on the test record.

8. Disconnect the 1310 nm laser from the optical attenuator, and reconnect the

1550 nm laser source. Set the optical attenuator to the correct wavelength.

14

NOTE. Do not disturb the fiber connection between the optical attenuator output
and the ORR24 input.

9. Adjust the optical attenuator until the voltmeter reading is the same as in

step 6 above ± 1%.

ORR24 Instruction Manual

Noise Equivalent Power

Performance Verification

10. Without moving the optical attenuator from the position in the previous step,

disconnect the output fiber of the optical attenuator from the inline adapter
with the ORR24 and insert the optical attenuator output into the optical
power meter.

11. Adjust the optical power meter to the calibrated wavelength setting of
1550 nm. Note the absolute power displayed. The 1550 nm conversion gain
in units of V/mW

opt

is

((200 mW) / (measured 1550 power)) × (1310 nm conversion gain)

12. Record the 1550 nm conversion gain on the test record.

Power the ORR24 under test using the digital sampling oscilloscope.

1. Zero the RF power meter.

2. Connect the ORR24 output channel to the RF power meter using a 1 GHz

low-pass filter in series.

3. With the dust cover on the input to the ORR24, the RF power meter should
read less than

[15 pW

+

4.5 10

+

W

elec

opt

ń

(NOTE : VńW

HzǸ

–15

opt

1 GHzǸ

(measured conversion gain in VńW

+Vń

mW

(measured conversion gain in VńW

50

W

1000)

opt

opt

2

)

opt

2

)]

4. Record the calculated and measured results on the test record.

ORR24 Instruction Manual

15

Performance Verification

Rise Time and HF Aberrations

1. Connect the output of the optical impulse generator to the ORR24 optical

input through the optical attenuator.

2. Connect the trigger output of the optical impulse generator to the trigger

input of the digital sampling oscilloscope with a 50 W, 5X electrical
attenuator in series with the trigger input.

3. Connect the ORR24 output to the digital sampling oscilloscope input using a

relatively short 50 W cable (i.e. < 1 meter).

4. Set the optical source to the 1 MHz rate and low energy mode. Adjust the

optical attenuator so that the height of the impulse is about 200 mV

5. Set the digital sampling scope to 10 mV/div vertical scale, 100 ps/div

horizontal scale, 1024-point record length, and insure the entire impulse
waveform is within the display region. Shift the horizontal record so that the
start of the impulse is within the first two divisions of the horizontal scale on
the display.

p-p

.

6. Average the waveform a minimum of 256 times, and store the averaged

waveform.

7. Recall the stored waveform, and measure the mean signal level before the

start of the impulse (i.e. measure the average vertical offset in the record
length preceding the impulse; if the impulse generator is temporarily
disabled, then the average DC level of the entire record length can be used
instead).

8. Program the digital sampling oscilloscope to display the integral of the

stored waveform minus the mean signal level before the impulse.

9. Measure the rise time of the integrated impulse response and insure that it is

less than or equal to 205 ps. Record the rise time on the test record.

10. Turn on the horizontal bar cursors and set them at the 0 and 100% levels of

the waveform, using the level 500 ps after the 50% point of the step as 100%
level. Record the difference between the two levels.

11. Now set the cursors on the minimum and maximum overshoot and under-

shoot points. Record the difference of the two levels. Divide the difference
voltage due to the aberrations by the step size and ensure that the result is
less or equal to 5%. Record the actual percentage on the test record.

16

ORR24 Instruction Manual

Bandwidth/Frequency Response

1. Recall the impulse waveform acquired in Step 6 on page 16.

2. Using a controller attached to the digital sampling oscilloscope via GPIB

(i.e. a PC, MAC, workstation, etc.), download the 1024-point, averaged
impulse response.

3. Using the available controller software (i.e. Labview, etc) perform an FFT
(Fast Fourier Transform) on the 1024-point impulse response; this trans­forms the time-domain impulse response to a scalar frequency response.

4. Check that the frequency response from DC to 2 GHz is greater than or equal
to –6 dB where dB = 20log (V

log/Vdc

Performance Verification

) or electrical power into 50 W.

ORR24 Instruction Manual

17

Performance Verification

T est record

Model/Serial Number: Certificate Number:
Temperature: RH %:
Date of Calibration: Technician:

Performance test Minimum Measured Maximum

Output zero N/A ±1 mV
DC conversion gain at 1310 nm ± 20 nm 0.500 V/mW
DC conversion gain at 1550 nm ± 20 nm 0.500 V/mW
Noise equivalent power

N/A _______W

opt
opt

Rise time N/A 205 ps
HF aberrations N/A 5%
Bandwidth, DC to 2 GHz – 6 dB (attach plot) N/A

N/A
N/A

(calculated)

P-P

elec

total

18

ORR24 Instruction Manual

Replaceable Parts

For information about replaceable parts, contact your Tektronix sales representa­tive.

1

Figure 5: ORR24 replaceable parts

3

2

ORR24 Instruction Manual

19

Replaceable Parts

1 2 3 4

Figure 6: Standard accessories

5

1

2

3

4

Figure 7: Optional accessories

1

Figure 8: Optional power cords

5

6

2

3

4

5

20

ORR24 Instruction Manual

Replaceable Parts

Replaceable parts list

Fig. &
index
number

5–1 211–0001–00 1 SCREW,MACHINE:2–56 X 0.25,PNH,STL CD PL,POZ 93907 ORDER BY DESCRIP

–2 200–3658–00 1 COVER,CONNECTOR:FC,W/CHAIN 80009 200–3658–00
–3 015–1022–00 1 TERMN,COAXIAL:50 OHM,0.5W,SMA 26805 2001–4401–00

6–1 131–6252–00 1 CONN:FC TO FC SQUARE MOUNT

–2 131–6250–00 1 CONN:FC TO ST ADAPTER W/ZIRCONIA CERAMIC

–3 131–6251–00 1 CONN:SC TO FC SQUARE FLANGE ADAPTER

–4 174–1910–00 1 CA ASSY FBR OPT :SM 2ML FC/PC TO FC/PC 05JW7 SGMGM–AA0002
–5 015–0560–00 1 CABLE,DLY,COAX:50

7–1 016–1609–00 1 POWER CORD KIT:ADAPTER CABLE & US POWER

–2 119–51 18–00 1 ATTEN,OPTICAL:30MM,L10DBFOR 1310/1550NM,FC

–3 015–0565–00 1 POWER DIVIDER:50 OHM,3 SMA,FEMALE CONN 64537 D293S

–4 020–2209–00 1 ACCESSORY KIT:CONNECTOR,OPTICAL,DIN TO FC

–5 174–3737–00 1 FIBER OPTIC:COUPLER, 1 X 2 SPLITTER,

–6 174–1497–00 1 CA ASSY,FBR OPT :SINGLE MODE,2M L

Tektronix
part number

071–0060–00 1 MANUAL,TECH:INSTRUCTION,ORR24,DP 80009 071–0060–00

015–1014–00 1 PWR DIVIDER,RES:50 OHM,SMA 64537 D241S

174–1385–00 1 CA ASSY,FBR OPT:SGL MODE,2M L,FC/PC

174–1386–00 1 CA ASSY ,FBR OPT:SINGLE MODE,2M L,FC/PC–ST 80009 174–1386–00
174–1387–00 1 CA ASSY ,FBR OPT:SGL MODE,2M L,FC/PC–FC/PC 80009 174–1387–00
174–1388–00 1 CA ASSY,FBR OPT :SGL MODE,2M

174–2322–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5

174–2323–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5

174–2324–00 1 CABLE,FIBER OPT :JUMPER,2 METER,62.5

Serial no.
effective

Serial no.
discont’d

Qty Name & description Mfr. code Mfr. part number

Standard accessories

ADAPTER,W/ZIRCONIA CERAMIC SLEEVE

SLEEVE

W/ZIRCONIA CERAMIC SLEEVE

OHM,2NS,W/CONN,SMA,MALE,EACH END

0C5R7 CO92290

0C5R7 C032980

0C5R7 C002453

0GZV8 SF104PE,460MM,2X1

1SMA–451

Optional accessories

CORD

CONN.FA100–35–10–HP,CTS710

SQUARE MOUNT ADAPTER,

WA VELENGTH INDEPENDENT, 90/10 RATIO, ATT .

0.1 DB, REFLE

FC/PC TO DIAMOND 2.5

DIAMOND3.5

L,FC/PC–BICONIC

MICRON,FC/PC TO FC/PC

MICRON,FC/PC TO BICONIC

MICRON,FC/PC TO SMA 906

80009 016–1609–00

0LK97 FA100–35–10–HP

80009 020–2209–00

0C5R7 3–0102–10–B–UFC–0

1–UFC–01

80009 174–1497–00

80009 174–1385–00

80009 174–1388–00

62712 174–2322–00

62712 174–2322–00

62712 PC/SK–20–002A

ORR24 Instruction Manual

21

Replaceable Parts

Replaceable parts list (cont.)

Fig. &
index
number

8–1 161–0066–09 1 CA ASSY,PWR:3,0.75MM SQ,250V/10A,99

–2 161–0066–10 1 CA ASSY ,PWR:3,1.0 MM SQ,250V/10A,2.5

–3 161–0066–11 1 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5

–4 161–0066–12 1 CA ASSY,PWR:3,18 AWG,250V/10A,98

–5 161–0154–00 1 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5

Tektronix
part number

Serial no.
effective

Serial no.
discont’d

Optional Power Cords

INCH,STR,IEC320,RCPT,EUROPEAN,

METER,STR,IEC320,RCPT X 13A,FUSED UK
PLUG(13A FUSE),UNI

METER,STR,IEC320,RCPT,AUSTRALIA,SAFTEY
CONTROLLED,

INCH,STR,IEC320,RCPT X NEMA 6–15P,US,SAFTEY
CONTROLLED,

METER,STR,IEC320,RCPT,SWISS,SAFTEY
CONTROLLED,

Mfr. part numberMfr. codeName & descriptionQty

2W733 ORDER BY

DESCRIPTION

TK2541 ORDER BY

DESCRIPTION

80126 ORDER BY

DESCRIPTION

S3109 ORDER BY

DESCRIPTION

5F520 86515030

Manufacturers cross index

Mfr.
code

05JW7 PURDY ELECTRONICS CORP INTEROPTIC DIVISION

0C5R7 ALCOA FUJIKURA LTD 150 RIDGEVIEW CIRCLE DUNCAN, SC 29334
0GZV8 HUBER & SUHNER INC 19 THOMPSON DRIVE ESSEX JUNCTION, VT 05452–3408
0LK97 JDS FITEL INC 570 WEST HUNT CLUB RD NEPEAN, ONTARIO CA ONTARIO K2G 5W8
26805 M/A COM OMNI SPECTRA INC MICROWAVE CONNECTOR DIV

2W733 BELDEN WIRE & CABLE COMPANY 2200 US HWY 27 SOUTH

5F520 PANEL COMPONENTS CORP PO BOX 115 OSKALOOSA, IA 52577–0115
62712 SEIKO INSTRUMENTS USA INC ELECTRONIC COMPONENTS DIV

64537 KDI/TRIANGLE ELECTRONICS INC 60 S JEFFERSON RD WHIPPANY, NJ 07981
80009 TEKTRONIX INC 14150 SW KARL BRAUN DR

80126 PACIFIC ELECTRICORD CO 747 WEST REDONDO BEACH

93907 CAMCAR DIV OF TEXTRON INC ATTN: ALICIA SANFORD

S3109 FELLER U.S. CORPORA TION 72 VERONICA AVE

TK2541 AMERICOR ELECTRONICS LTD UNIT–H

Manufacturer Address City , state, zip code

720 PALOMAR AVE

140 4TH AVE

PO BOX 1980

2990 W LOMITA BLVD

PO BOX 500

PO BOX 10

516 18TH AVE

UNIT #4

2682 W COYLE AVE

SUNNYVALE, CA 94086

WAL THAM, MA 02254

RICHMOND, IN 47374

TORRANCE, CA 90505

BEAVERT ON, OR 97077–0001

GARDENA, CA 90247–4203

ROCKFORD, IL 611045181

SOMERSET, NJ 08873

ELK GROVE VILLAGE, IL 60007

22

ORR24 Instruction Manual