Comtech EF Data EQ90 User Manual

p

EQ90 Series

Group Delay/Amplitude Equalizer

Installation and O

eration Manual

Part Number MN/EQ900.IOM Revision 2

EQ90 Series

Comtech EFData is an ISO 9001

Registered Company.

Group Delay/Amplitude Equalizer

Installation and Operation Manual

Part Number MN/EQ90.IOM

Revision 2

June 14, 1998

Copyright © Comtech EFData, 2000. All rights reserved. Printed in the USA.

Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, [phone], FAX: [phone].

Customer Support

Contact the Comtech EFData Customer Support Department for:

• Product support or training

• Information on upgrading or returning a product

• Reporting comments or suggestions concerning manuals

A Customer Support representative may be reached at:

Comtech EFData
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA

[phone] (Main Comtech EFData Number)
[phone] (Customer Support Desk)
[phone] FAX

or, E-Mail can be sent to the Customer Support Department at:

[e-mail]

Contact us via the web at www.comtechefdata.com

1. To return a Comtech EFData product (in-warranty and out-of-warranty) for
repair or replacement:

2. Request a Return Material Authorization (RMA) number from the Comtech
EFData Customer Support Department.

3. Be prepared to supply the Customer Support representative with the model
number, serial number, and a description of the problem.

4. To ensure that the product is not damaged during shipping, pack the product in
its original shipping carton/packaging.

5. Ship the product back to Comtech EFData. (Shipping charges should be prepaid.)

For more information regarding the warranty policies, see Warranty Policy, p. viii.

.

ii Rev. 2

Table of Contents

CHAPTER 1. INTRODUCTION..................................................................................1–1

1.1 Overview..................................................................................................................................................... 1–1

1.2 Description of Equipment .........................................................................................................................1–3

1.2.1 Functional Description........................................................................................................................1–3

1.2.2 Mechanical Description.......................................................................................................................1–3

1.3 Specification ............................................................................................................................................... 1–4

1.4 Dimensional Envelope ............................................................................................................................... 1–6

CHAPTER 2. INSTALLATION...................................................................................2–1

2.1 Unpacking................................................................................................................................................... 2–1

2.2 Installation.................................................................................................................................................. 2–2

2.3 External Connectors.................................................................................................................................. 2–4

2.3.1 Channel Monitor ................................................................................................................................. 2–5

2.4 Chassis Ground.......................................................................................................................................... 2–5

CHAPTER 3. OPERATION.........................................................................................3-1

3.1 Front Panel Indicators................................................................................................................................3-1

3.2 Rear Panel Control and Connectors .........................................................................................................3-3

3.3 Equalizer Adjustments...............................................................................................................................3-5

3.3.1 Power ON.............................................................................................................................................3-5

3.4 Alignment Procedures................................................................................................................................3-5

Rev. 2 iii

Errata B

Comtech EFData Documentation Update

Subject:
Date:

Document:
Part Number:
Collating Instructions:

Comments:

The following addition is provided to revise the unit.

Change Specifics:

Add DC Input Filter Module pinouts
September 7, 2005

EQ-90 IF Group Delay Equalizer
Part Number MN/RC1160.EA1
Attach this page to 2-2

2.3.1 DC Filter Input Module

The DC Input Filter Module (shown in Figure Figure 2-1) has pinouts listed in Table 2-1. Input
voltage range: -36 to -72 VDC.

A B C

Figure 2-1. DC Input Filter Module

Filename: T_ERRATA 1

Table 2-1. DC Input Filter Module

Pin # Signal Name Wire Colors Wiring Options

A Ground Green/Yellow Earth Ground Earth Ground
B Negative Black -48 VDC 0 VDC

C Positive Red 0 VDC +48 VDC

Filename: T_ERRATA 2

Preface EQ90 Series

3.4.1 Equalizer Adjustment...........................................................................................................................3-5

3.4.2 Alignment to a Specific Delay Requirement......................................................................................3-11

3.4.3 Slope Equalizer Adjustment...............................................................................................................3-15

3.4.4 System Integration Alignment Procedure..........................................................................................3-16

CHAPTER 4. MAINTENANCE...................................................................................4–1

4.1 Checkout..................................................................................................................................................... 4–1

4.2 Troubleshooting.........................................................................................................................................4–2

4.3 Replacement Procedures...........................................................................................................................4–3

4.3.1 Chassis Cover...................................................................................................................................... 4–3

4.3.2 Equalizer Modules .............................................................................................................................. 4–3

4.3.3 Power Supply Assembly .....................................................................................................................4–3

4.3.4 Fuse Replacement ............................................................................................................................... 4–4

4.3.5 Spare Parts........................................................................................................................................... 4–4

APPENDIX A. APPLICATION NOTE ....................................................................... A–1

A.1 Introduction..........................................................................................................................................A–1

A.2 Operational Parameters....................................................................................................................... A–2

A.3 Fault Monitor........................................................................................................................................ A–3

A.4 Monitor Interface.................................................................................................................................A–3

GLOSSARY ................................................................................................................g–1

iv Rev. 2

EQ90 Series Preface

Figures

Figure 1-1. EQ90 Series Group Delay/Amplitude Equalizer Assembly..............................................1–2

Figure 1-2. Dimensional Envelope.......................................................................................................1–6

Figure 2-1. Typical Rack Installation................................................................................................... 2–3

Figure 2-2. Equalizer Power and Interface Connectors ........................................................................ 2–4

Figure 3-1. Front Panel Indicators.........................................................................................................3-2

Figure 3-2. Rear Panel Control and Connectors....................................................................................3-3

Figure 3-3. Equalizer Module...............................................................................................................3-6

Figure 3-4. Alignment Setup.................................................................................................................3-8

Figure 3-5. Effect on Delay of Varying C Switch.................................................................................3-8

Figure 3-6. Effect on Delay of Varying “L”........................................................................................3-10

Figure 3-7. Effect on Amplitude of Varying “R”................................................................................3-10

Figure 3-8. Effect on Amplitude of Varying “R”................................................................................3-11

Figure 3-9. Multi-Pole Bandpass Filter Delay Response ....................................................................3-11

Figure 3-10. Single-Section Equalizer Delay Response......................................................................3-12

Figure 3-11. Composite Delay Response............................................................................................3-12

Figure 3-12. Equalizer Composite Delay Response............................................................................3-14

Figure 3-13. All Sections Tuned 1 MHz Lower in Frequency............................................................3-14

Figure 3-14. All Sections Tuned 1 MHz Higher In Frequency...........................................................3-15

Figure 3-15. System Integration Alignment Test Setup......................................................................3-16

Figure 3-16. Typical Satellite Transponder Delay..............................................................................3-17

Figure 3-17. Required Equalizer Delay Characteristic........................................................................3-17

Figure 3-18. Ideal Composite Delay Result........................................................................................3-18

Figure 3-19. Typical Half Transponder Video Carrier Delay.............................................................3-19

Figure 3-20. Required Equalized Delay Characteristic.......................................................................3-19

Figure 3-21. Ideal Composite Delay Result........................................................................................3-20

Figure 3-22. Typical Delay Characteristic..........................................................................................3-20

Figure 3-23. Shifted Equalizer Delay Characteristic...........................................................................3-21

Figure 3-24. Resultant Composite Delay Characteristic.....................................................................3-21

Figure 3-25. Transponder Delay Characteristic ..................................................................................3-23

Figure 3-26. Equalizer Delay Characteristic.......................................................................................3-23

Figure 3-27. Resultant Composite Delay Characteristic.....................................................................3-24

Figure 3-28. Transponder Delay Characteristic ..................................................................................3-24

Figure 3-29. Equalizer Offset Delay Characteristic............................................................................3-25

Figure 3-30. Resultant Composite Delay Characteristic.....................................................................3-25

Figure 4-1. Equalizer Component Locations ....................................................................................... 4–5

Tables

Table 1-1. Electrical Specifications and Operational Characteristics.......................................... 1–4

Table 2-1. Single Channel Equalizer Rear Panel Mating Connectors......................................... 2–5

Table 2-2. Dual Channel Equalizer Rear Mating Connectors .....................................................2–5

Table 3-1. Front Panel Indicator Functions..................................................................................3-2

Table 3-2. Rear Panel Controls and Connector Functions ...........................................................3-4

Table 3-3. Equalizer Module Control Functions..........................................................................3-6

Table 3-4. Peak-to-Peak Delay Magnitude ................................................................................3-13

Table 4-1. Equalizer Troubleshooting Procedure........................................................................ 4–2

Table 4-2. Equalizer Spare Parts................................................................................................. 4–5

Rev. 2 v

Preface EQ90 Series

Overview of Changes to Previous Edition

A summary of the changes made to Rev. 1 are as follows:

• Manual updated for styles and conventions relative to Comtech EFData format.

About this Manual

This manual provides installation and operation information for the EFData EQ-90 Series
Group Delay/Amplitude Equalizer. This is a technical document intended for earth
station engineers, technicians, and operators responsible for the operation and
maintenance of the EQ-90.

Conventions and References

Cautions and Warnings

CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other

CAUTION

unsafe practices or risks of property damage.

WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.

WARNING

Metric Conversion

Metric conversion information is located on the inside back cover of this manual. This
information is provided to assist the operator in cross-referencing English to Metric
conversions.

Recommended Standard Designations

Recommended Standard (RS) Designations have been superseded by the new designation
of the Electronic Industries Association (EIA). References to the old designations are
shown only when depicting actual text displayed on the screen of the unit (RS-232, RS-

vi Rev. 2

EQ90 Series Preface

485, etc.). All other references in the manual will be shown with the EIA designations
(EIA-232, EIA-485, etc.) only.

Military Standards

“MIL-STD-188” apply to the 114A series (i.e., MIL-STD-188-114A), which provides
electrical and functional characteristics of the unbalanced and balanced voltage digital
interface circuits applicable to both long haul and tactical communications. Specifically,
these references apply to the MIL-STD-188-114A electrical characteristics for a balanced
voltage digital interface circuit, Type 1 generator, for the full range of data rates. For
more information, refer to the Department of Defense (DOD) MIL-STD-188-114A,
“Electrical Characteristics of Digital Interface Circuits.”

Trademarks

Windows is a trademark of Microsoft Corporation. Other product names mentioned in
this manual may be trademarks or registered trademarks of their respective companies
and are hereby acknowledged.

Reporting Comments or Suggestions Concerning this Manual

Comments and suggestions regarding the content and design of this manual will be
appreciated. To submit comments, please contact the Comtech EFData Customer Support
Department.

Low Voltage Directive (LVD)

The following information is applicable for the European Low Voltage Directive
(EN60950):

<HAR>

!

International Symbols:

Symbol Definition Symbol Definition.

Type of power cord required for use in the European Community.
CAUTION: Double-pole/Neutral Fusing.
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung.

Alternating Current.

Fuse.

Safety Ground.

Chassis Ground.

Rev. 2 vii

Preface EQ90 Series

Warranty Policy

This Comtech EFData product is warranted against defects in material and workmanship
for a period of one year from the date of shipment. During the warranty period, Comtech
EFData will, at its option, repair or replace products that prove to be defective.

For equipment under warranty, the customer is responsible for freight to Comtech
EFData and all related custom, taxes, tariffs, insurance, etc. Comtech EFData is
responsible for the freight charges
the customer. Comtech EFData will return the equipment by the same method (i.e., Air,
Express, Surface) as the equipment was sent to Comtech EFData.

only

for return of the equipment from the factory to

Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from improper installation or
maintenance, abuse, unauthorized modification, or operation outside of environmental
specifications for the product, or, for damages that occur due to improper repackaging of
equipment for return to Comtech EFData.

No other warranty is expressed or implied. Comtech EFData specifically disclaims the
implied warranties of merchantability and fitness for particular purpose.

Exclusive Remedies

The remedies provided herein are the buyer's sole and exclusive remedies. Comtech
EFData shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.

Disclaimer

Comtech EFData has reviewed this manual thoroughly in order that it will be an easy-to­use guide to your equipment. All statements, technical information, and
recommendations in this manual and in any guides or related documents are believed
reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and
they are not intended to be, nor should they be understood to be, representations or
warranties concerning the products described. Further, Comtech EFData reserves the
right to make chang es in the specifications of the products described in this m anual at any
time without notice and without obligation to notify any person of such changes.

If you have any questions regarding your equipment or the information in this manual,
please contact the Comtech EFData Customer Support Department.

viii Rev. 2

Errata A

Comtech EFData Documentation Update

Subject:

Date:
Document:

Part Number:
Collating Instructions:

Comments:

The following changes provide additional Table 2-3 and updates to paragraph 2.3.1. This
information will be incorporated into the next r evision.

Changes to Table 2-2. Summar y Alarm Interface Connector J3 Pin
Assignments

October 18, 2000
EQ90 Group Delay/Amplitude Equalizer Installation and Operation
Manual, Rev. 2, dated June 14, 1998
MN/EQ90.EA2
Attach this page to page 2-5

Change Specifics:

Table 2-3. Summary Alarm Interface Connector J3 Pin Assignments

Pin No. Assignment

1,2

3 Normally Open (Equalizer Operational). Referenced to pin 4.
4 Common

5,6 Not Used

7 Alarm Out (Open, Equalizer Operational). Referenced to pin 8.
8 Alarm Common
9 Normally Closed (Equalizer Operational). Referenced to pin 4.

Not Used

2.3.1 Channel Monitor

The alarm monitor output connector (J3) provides a summary fault status out put to a summary
alarm panel, or annunciator type device, or redundancy switching equipm ent . Refer to Table 2-3
for pin assignments.

EQ90 REV 2 ERRATA A.DOC

1

This chapter contains an introduction, a description of the equipment, its purpose and
capabilities, and major characteristics and specifications.

1.1 Overview

This chapter provides instructions for the EQ90 Series Group Delay/Amplitude
Equalizer Assembly (Figure 1-1), herein after referred to as, “the equalizer.” Two
versions of the equalizer are manufactured:

Single channel unit

•

Dual channel unit

•

The single channel unit (D68563) and dual channel unit (D68564) can be equipped for a
70 or 140 MHz input/output signal.

The 10-section 70 MHz delay equalization PCB is contained in the internal equalizer
assembly A1 and A2. The PCB contains a switch which enables or disables the alarm
output from the equalizer due to a low IF output signal level. The switch is accessed by
removing the equalizer top cover. The cover on the internal assembly A1 or A2 is labeled
BYPASS or LVL MON.

In the LVL MON position, the IF output signal level is monitored. In the event,

•

the IF signals level falls below

-20 dBm nominal, an alarm indicated on the front panel of the equalizer and
reported to external monitor and control equipment.

In the BYPASS position, an alarm will result only if the internal power supply

•

fails.

Chapter 1.

INTRODUCTION

1

Rev. 2 1–1

Introduction EQ90 Amplitude Equalizer

Figure 1-1. EQ90 Series Group Delay/Amplitude Equalizer Assembly

1–2 Rev. 2

EQ90 Amplitude Equalizer Introduction

1.2 Description of Equipment

1.2.1 Functional Description

The equalizer is intended to be used in ground-based satellite transmit (TX) and receive
(RX) communications systems. It provides delay equalization to compensate for non­linear delay distortions by:

Up and Down Converters

•

High Power Amplifiers

•

High Power Multiplex Combiners

•

Satellite Filters

•

Waveguide

•

The equalizer is designed as a stand-alone device that can be installed in a 70 or
140 MHz signal path to provide delay equalization of the uplink or downlink.

1.2.2 Mechanical Description

The equalizer is contained in a 1.75 inch (4.4 cm) tall, slide-mounted drawer designed to
mount directly in a standard Electronics Industries Association (EIA) equipment rack or
cabinet. The drawer, when fully extended on its slides, permits rear panel connector
access.

A removable top cover, secured to the chassis with two screws, provides access to the
internal modules.

Rev. 2 1–3

Introduction EQ90 Amplitude Equalizer

1.3 Specification

Refer to Table Chapter 1-1 for the electrical and operational characteristics of the
equalizer.

Table Chapter 1-1. Electrical Specifications and Operational

Characteristics

Characteristic Specification

IF Input

Frequency

Level -15 dBm maximum (single carrier)

Impedance
Return Loss 20 dB

Frequency

Level 0 dB nominal
Impedance
Return Loss 20 dB

Gain 15 dB nominal
Amplitude Response
1 dB Compression +8 dBm
Third Order Intercept Point +18 dBm
Group Delay
(All Sections Off)
Amplitude Equalization
Adjustment Range

Delay Equalization Adjustment Range/per section
70 MHz < 15 ns/36 MHz

140 MHz < 10 ns/72 MHz

IF Fail Trip Point Approx. -20 dBm
Fault/Status Type Relay contact output

Voltage
Frequency 47 to 63 Hz
Power Consumption 10 VA/Nominal

70 MHz ± 18 MHz
140 MHz ± 36 MHz

-18 dBm maximum. (multi-carrier composite)
75 Ω, unbalanced

IF Output

70 MHz ± 18 MHz
140 MHz ± 36 MHz

75Ω, unbalanced

Input to Output

Adjustable to ± 0.15 dB

< 2 ns

3 dB/36 MHz minimum (70 MHz)

±

3 dB/72 MHz minimum (140 MHz)

±

>40 ns/36 MHz

> 30 ns/72 MHz

1 Form ‘C’
1 Form ‘A’

Primary Power Requirements

84 to 265 VAC ± 10%

1–4 Rev. 2

EQ90 Amplitude Equalizer Introduction

Table 1-1. Electrical Specifications and Operational Characteristics (Continued)

Temperature

Operating
Storage

Operating 0 to 95%, non-condensing
Storage 0 to 100%

Operating to 10,000 feet (3.048 km) ASL
Storage to 50,000 feet (15.24 km) ASL
Shock and Vibration As encountered in normal commercial

Front Panel Indicators Power/Status

0° to +50°C (32° to 122°F)

-30° to +75°C (-22° to +167°F)

Humidity

Altitude

shipping, handling, and operation.

Rev. 2 1–5

Introduction EQ90 Amplitude Equalizer

1.4 Dimensional Envelope

Refer to Figure 1-2 for the dimensional envelope of the equalizer.

Note:

All dimensions are in inches, centimeters are in parenthesis.

19.00

(48.26)

1.00

(2.54)

20.00
(50.8)

(4.45)

1.75

Figure 1-2. Dimensional Envelope

1–6 Rev. 2

Chapter 2.

INSTALLATION

2

This chapter provides unpacking and installation instructions, and a description of
external connections and backward alarm information.

The equipment contains parts and assemblies sensitive to damage by
Electrostatic Discharge (ESD). Use ESD precautionary procedures when

CAUTION

touching, removing, or inserting PCBs.

2.1 Unpacking

The modem and manual are packaged in pre-formed, reusable, cardboard cartons
containing foam spacing for maximum shipping protection.

Do not use any cutting tool that will extend more than 1 inch into the
container. This can cause damage to the modem.

CAUTION

Unpack the equalizer as follows:

Rev. 2 2–1

1. Cut the tape at the top of the carton indicated by OPEN THIS END.

2. Remove the cardboard/foam space covering the equalizer.

3. Remove the equalizer, manual, and power cord from the carton.

4. Save the packing material for storage or reshipment purposes.

5. Inspect the equipment for any possible damage incurred during shipment.

6. Check the equipment against the packing list to ensure the shipment is correct.

7. Refer to Section 2.2 for installation instructions.

Installation EQ90 Series Group Delay/Amplitude Equalizer

2.2 Installation

Note:

Omit Steps 1, 2, and 3 if the cabinet slide sections with extenders are already
installed within the equipment rack at the proper elevation, and the chassis slide sections
are mounted on the equalizer chassis.

1. Attach chassis slide sections (Figure 2-1) to equalizer with four number 8-32
screws and lockwashers on each side of chassis.

2. Attach mounting bracket to rear of each cabinet slide section with two number
10-32 screws and flatwashers and nut plates. Before tightening hardware, adjust
mounting brackets so that mounting surfaces of brackets butt up against
mounting surfaces of equipment rack.

3. At the proper elevation within the equipment rack, mount slides with mounting
bracket to equipment rack as follows:

a. Mount each mounting bracket to rear cabinet mounting surface with

modified nut plates (optional) and two number 10-32 screws, lockwashers,
and flatwashers.

b. Mount each slide to front cabinet mounting surface with modified nut plates

and two number 10-32 screws, lockwashers, and flatwashers.

4. Slide cabinet slide extenders out to fully extended and locked positions.

5. Lift equalizer into position so that chassis slide sections are aligned with cabinet
slide extenders and slide chassis slide sections into cabinet slide extenders. Slide
equalizer back until slide release buttons on chassis slide sections snap into holes
in cabinet slide sections.

6. Connect all cables to associated rear panel connectors.

7. Press in slide release buttons, push equalizer fully into rack, and install
appropriate hardware for front panel mounting flanges to secure equalizer to
rack.

2–2 Rev. 2

EQ90 Series Group Delay/Amplitude Equalizer Installation

Figure 2-1. Typical Rack Installation

Rev. 2 2–3