Tektronix 7017 Instruction Manual

Instruction Manual

Model 7017

800MHz Multiplexer Card

Contains Operating and Servicing Information

7017-901-01 Rev. A / 8-96

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of
shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries,
diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact K eithley headquarters in Cleveland, Ohio. Y ou will
be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs
will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the origi­nal warranty period, or at least 90 days.

LIMITATION OF WARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or misuse of
any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or
problems arising from normal wear or failure to follow instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE
BUYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT, INDI­RECT , SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND
SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF
SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL
AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.

Keithley Instruments, Inc. • 28775 Aurora Road • Cleveland, OH 44139 • 216-248-0400 • Fax: [phone] • http://www.keithley.com

CHINA: Keithley Instruments China • Yuan Chen Xin Building, Room 705 • No. 12 Yumin Road, Dewei, Madian • Beijing, China 100029 • 8610-2022886 • Fax: [phone]
FRANCE: Keithley Instruments SARL • BP 60 • 3 allée des Garays • 91122 Palaiseau Cédex • 31-6-0115155 • Fax: [phone]
GERMANY: Keithley Instruments GmbH • Landsberger Straße 65 • 82110 Germering • 49-89-849307-0 • Fax: [phone]
GREAT BRITAIN: Keithley Instruments, Ltd. • The Minster • 58 Portman Road • Reading, Berkshire RG30 1EA • 44-01734-575666 • Fax: [phone]
ITALY: Keithley Instruments SRL • Viale S. Gimignano 38 • 20146 Milano • 39-2-48303008 • Fax: [phone]
JAPAN: Keithley Instruments Far East KK • Aibido Bldg. • 7-20-2 Nishishinjuku • Shinjuku-ku, Tokyo 160 • 81-3-5389-1964 • Fax: [phone]
NETHERLANDS: Keithley Instruments BV • Avelingen West 49 • 4202 MS Gorinchem • 31-(0)183-635333 • Fax: [phone]
SWITZERLAND: Keithley Instruments SA • Kriesbachstrasse 4 • 8600 Dübendorf • 41-1-8219444 • Fax: [phone]
TAIWAN: Keithley Instruments Taiwan • 1, Ming-Yu First Street • Hsinchu, Taiwan, R.O.C. • 886-35-778462 • Fax: [phone]

Model 7017 800MHz Multiplexer Card

Instruction Manual

©1996, Keithley Instruments, Inc.

Test Instrumentation Group

All rights reserved.

Cleveland, Ohio, U.S.A.

First Printing, August 1996

Document Number: 7017-901-01 Rev. A

Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision
Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revi­sions, contain important change information that the user should incorporate immediately into the manual. Addenda are num­bered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of the manual are
incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this print history page.

Revision A (Document Number 7017-901-01).....................................................................................August 1996

All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered trademarks of their respective holders.

Safety Precautions

The following safety precautions should be observed before using
this product and any associated instrumentation. Although some in­struments and accessories would normally be used with non-haz­ardous voltages, there are situations where hazardous conditions
may be present.

This product is intended for use by qualified personnel who recog­nize shock hazards and are familiar with the safety precautions re­quired to avoid possible injury. Read the operating information
carefully before using the product.

Exercise extreme caution when a shock hazard is present. Lethal
voltage may be present on cable connector jacks or test fixtures. The
American National Standards Institute (ANSI) states that a shock
hazard exists when voltage levels greater than 30V RMS, 42.4V
peak, or 60VDC are present.

pect that hazardous voltage is present in any un­known circuit before measuring.

Before operating an instrument, make sure the line cord is connect­ed to a properly grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks
before each use.

For maximum safety, do not touch the product, test cables, or any
other instruments while power is applied to the circuit under test.
ALWAYS remove power from the entire test system and discharge
any capacitors before: connecting or disconnecting cables or jump­ers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the
common side of the circuit under test or power line (earth) ground.
Always make measurements with dry hands while standing on a
dry, insulated surface capable of withstanding the voltage being
measured.

A good safety practice is to ex-

Do not exceed the maximum signal levels of the instruments and ac­cessories, as defined in the specifications and operating informa­tion, and as shown on the instrument or test fixture panels, or
switching card.

Do not connect switching cards directly to unlimited power circuits.
They are intended to be used with impedance limited sources.
NEVER connect switching cards directly to AC main. When con­necting sources to switching cards, install protective devices to lim­it fault current and voltage to the card.

When fuses are used in a product, replace with same type and rating
for continued protection against fire hazard.

Chassis connections must only be used as shield connections for
measuring circuits, NOT as safety earth ground connections.

If you are using a test fixture, keep the lid closed while power is ap­plied to the device under test. Safe operation requires the use of a
lid interlock.

If a screw is present, connect it to safety earth ground using #18
AWG or larger wire.

The symbol on an instrument or accessory indicates that 1000V
or more may be present on the terminals. Refer to the product man­ual for detailed operating information.

Instrumentation and accessories should not be connected to hu­mans.

Maintenance should be performed by qualified service personnel.
Before performing any maintenance, disconnect the line cord and
all test cables.

7017 • 800MHZ MULTIPLEXER SPECIFICATIONS

MULTIPLEXERS PER CARD: 2(with isolated ground).
CHARACTERISTIC IMPEDANCE: 50Ωnominal.
CHANNELS PER MULTIPLEXER: 4.
CONTACT CONFIGURATION: 1 pole Form A, common shield.
RELAY DRIVE CURRENT: 26mA per channel.
CONNECTOR TYPE: SMA.
RECOMMENDED CABLE: RG-223/U.
ACTUATION TIME: 1ms.
MAXIMUM VOLTAGE: 42V peak.
MAXIMUM CURRENT: 1A carry/0.5A switched.
MAXIMUM POWER: 10VA.
ISOLATION:

Multiplexer to Multiplexer: >109Ω.
Center to Shield: >109Ω, <60pF.
Channel to Channel: >109Ω.

CONTACT POTENTIAL: <25µV.
CONTACT RESISTANCE: <0.5Ωinitial, 1Ω at end of contact life.
CONTACT LIFE: 1V, 10mA: 108closures. 20V, 0.5A: 5×104closures.
AC PERFORMANCE:

For ZL= ZS= 50Ω

≤10 ≤100 ≤500 ≤800

MHz MHz MHz MHz
Insertion Loss (dB): <0.35 <1.0 <2.0 <3.0
Crosstalk (dB)

1

Channel-Channel <–60 <–40 <–35 <–30
Mux. to Mux. <–80 <–60 <–60 <–55

VSWR: <1.2 @ 100MHz.

1

Specification assumes 50Ω termination.

ENVIRONMENT:Operating: 0° to 50°C, up to 35°C at <80% R.H.

Storage: –25°C to 65°C.

Specifications are subject to change without notice.

7/3/96

IN 1

IN 2
Output A
IN 3

IN 4

IN 5

IN 6
Output B
IN 7

IN 8

Table of Contents

1 General Information

1.1 Introduction..........................................................................................................................................................1-1

1.2 Features................................................................................................................................................................1-1

1.3 Warranty information...........................................................................................................................................1-1

1.4 Manual addenda...................................................................................................................................................1-1

1.5 Safety symbols and terms ....................................................................................................................................1-1

1.6 Specifications.......................................................................................................................................................1-1

1.7 Unpacking and inspection....................................................................................................................................1-2

1.7.1 Inspection for damage................................................................................................................................1-2

1.7.2 Handling precautions .................................................................................................................................1-2

1.7.3 Shipment contents......................................................................................................................................1-2

1.7.4 Instruction manual......................................................................................................................................1-2

1.7.5 Repacking for shipment .............................................................................................................................1-2

1.8 Recommended cables and connectors..................................................................................................................1-2

2 Connections and Installation

2.1 Introduction .........................................................................................................................................................2-1

2.2 Handling precautions ...........................................................................................................................................2-1

2.3 Connections..........................................................................................................................................................2-1

2.3.1 Simplified schematic..................................................................................................................................2-1

2.3.2 Card configuration .....................................................................................................................................2-1

2.3.3 Input/output connecting cables ..................................................................................................................2-3

2.3.4 Typical connecting scheme........................................................................................................................2-3

2.4 Card installation and removal ..............................................................................................................................2-3

2.4.1 Card installation.........................................................................................................................................2-4

2.4.2 Card removal..............................................................................................................................................2-4

i

3 Operation

3.1 Introduction ......................................................................................................................................................... 3-1

3.2 Signal limitations................................................................................................................................................. 3-1

3.3 Front panel control............................................................................................................................................... 3-1

3.3.1 Closing and opening channels................................................................................................................... 3-1

3.3.2 Scanning channels ..................................................................................................................................... 3-2

3.4 IEEE-488 bus control .......................................................................................................................................... 3-2

3.4.1 Closing and opening channels................................................................................................................... 3-2

3.4.2 Scanning channels ..................................................................................................................................... 3-2

3.5 Switching considerations..................................................................................................................................... 3-2

3.5.1 Card characteristics.................................................................................................................................... 3-2

3.5.2 Cable characteristics.................................................................................................................................. 3-3

3.6 Applications......................................................................................................................................................... 3-3

3.6.1 Multiplexer expansion............................................................................................................................... 3-3

3.6.2 Filter testing............................................................................................................................................... 3-7

3.6.3 Tape head production testing..................................................................................................................... 3-7

4 Servicing

4.1 Introduction ......................................................................................................................................................... 4-1

4.2 Handling and cleaning precautions...................................................................................................................... 4-1

4.2.1 Handling precautions................................................................................................................................. 4-1

4.2.2 Soldering considerations............................................................................................................................ 4-1

4.3 Performance verification ..................................................................................................................................... 4-1

4.3.1 Environmental conditions.......................................................................................................................... 4-2

4.3.2 Recommended verification equipment...................................................................................................... 4-2

4.3.3 Insertion loss tests...................................................................................................................................... 4-2

4.3.4 Isolation tests............................................................................................................................................. 4-4

4.4 Special handling of static-sensitive devices ........................................................................................................ 4-8

4.5 Principles of operation......................................................................................................................................... 4-8

4.5.1 Block diagram............................................................................................................................................ 4-8

4.5.2 Relay control.............................................................................................................................................. 4-9

4.5.3 Switching circuits ...................................................................................................................................... 4-9

4.5.4 Card configuration memory....................................................................................................................... 4-9

4.6 Troubleshooting................................................................................................................................................... 4-9

4.6.1 Troubleshooting equipment....................................................................................................................... 4-9

4.6.2 Troubleshooting procedure........................................................................................................................ 4-9

5 Replaceable Parts

5.1 Introduction.......................................................................................................................................................... 5-1

5.2 Parts list ............................................................................................................................................................... 5-1

5.3 Ordering information........................................................................................................................................... 5-1

5.4 Factory service..................................................................................................................................................... 5-1

5.5 Component layout and schematic diagram.......................................................................................................... 5-1

ii

List of Illustrations

2 Connections and Installation

Figure 2-1 Model 7017 simplified schematic ................................................................................................................2-2

Figure 2-2 Model 7017 card configuration....................................................................................................................2-2

Figure 2-3 Typical connection scheme..........................................................................................................................2-3

Figure 2-4 Card installation in Model 7001...................................................................................................................2-4

Figure 2-5 Card installation in Model 7002...................................................................................................................2-5

3 Operation

Figure 3-1 “T” connector multiplexer expansion ..........................................................................................................3-4

Figure 3-2 Maintaining 50 Ω characteristic impedance ................................................................................................. 3-5

Figure 3-3 4 × 4 matrix connections..............................................................................................................................3-6

Figure 3-4 Filter testing .................................................................................................................................................3-7

Figure 3-5 Tape head production testing .......................................................................................................................3-8

4 Servicing

Figure 4-1 Connections for insertion loss tests..............................................................................................................4-3

Figure 4-2 Connections for channel isolation tests........................................................................................................4-5

Figure 4-3 Connections for center-to-shield isolation tests ...........................................................................................4-6

Figure 4-4 Connections for multiplexer-to-multiplexer isolation tests..........................................................................4-7

Figure 4-5 Block diagram ..............................................................................................................................................4-8

iii

List of Tables

4 Servicing

Table 4-1 Recommended verification equipment ........................................................................................................4-2

Table 4-2 Insertion loss values.....................................................................................................................................4-2

Table 4-3 Recommended troubleshooting equipment..................................................................................................4-9

Table 4-4 Troubleshooting procedure ........................................................................................................................4-10

5 Replaceable Parts

Table 5-1 Model 7017 parts list....................................................................................................................................5-2

v

1

General Information

1.1 Introduction

This section contains general information about the Model
7017 800MHz Multiplexer Card. The Model 7017 is equipped
with 2 four-channel multiplexers and is designed for 50 Ω op­eration.

1.2 Features

Key Model 7017 features include:

• Two independent four-channel multiplexers.

• Long relay contact life for high reliability.

•50 Ω characteristic impedance.

• 800MHz bandwidth.

• Low insertion loss (<1dB @ 100MHz).

• Low VSWR assures good high-frequency performance.

1.3 Warranty information

Warranty information is located on the inside front cover of
this manual. Should your Model 7017 require warranty ser­vice, contact the Keithley representativ e or authorized repair
facility in your area for more information. When returning
the card for repair, be sure to fill out and include the service
form at the back of this manual in order to provide the repair
facility with the necessary information.

1.4 Manual addenda

Any improvements or changes concerning the card or manu­al will be explained in an addendum included with the card.

1.5 Safety symbols and terms

The following symbols and terms may be found on an instru­ment or used in this manual.

!

The symbol on equipment indicates that you should re­fer to the operating instructions located in the instruction
manual.

The WARNING heading used in this manual explains dan­gers that could result in personal injury or death. Alw ays read
the associated information very carefully before performing
the indicated procedure.

The CAUTION heading used in this manual explains haz­ards that could damage the multiplexer card. Such damage
may invalidate the warranty.

1.6 Specifications

Model 7017 specifications are located at the front of this
manual.

1-1

General Information

1.7 Unpacking and inspection

1.7.1 Inspection for damage

The Model 7017 is packaged in a re-sealable, anti-static bag
to protect it from damage due to static discharge and from
contamination that could degrade its performance. Before re­moving the card from the bag, observe the following han­dling precautions.

1.7.2 Handling precautions

• Always grasp the card by the side edges and covers. Do
not touch the board surfaces or components.

• After removing the card from its anti-static bag, inspect
it for any obvious signs of physical damage. Report any
damage to the shipping agent immediately.

• When the card is not installed in a switching main­frame, keep the card in its anti-static bag and store it in
the original packing carton.

1.7.3 Shipment contents

The following items are included with every Model 7017 or ­der:

• Model 7017 800MHz Multiplexer Card

• Model 7017 Instruction Manual

1.7.4 Instruction manual

If an additional Model 7017 Instruction Manual is required, or­der the manual package, Keithley part number 7017-901-00.
The manual package includes an instruction manual and any
pertinent addenda.

1.7.5 Repacking for shipment

Should it become necessary to return the Model 7017 for re­pair, carefully pack the unit in its original packing carton or
the equivalent, and include the following information:

• Call the Repair Department at 1-800-552-1115 for a
Return Material Authorization (RMA) number.

• Advise as to the warranty status of the card.

• Write ATTENTION REPAIR DEPARTMENT and the
RMA number on the shipping label.

• Fill out and include the service form located at the back
of this manual.

1.8 Recommended cables and connectors

The recommended cable is RG223/U, and the recommended
connector type is SMA. Other 50 Ω cables may be used, but
consider key parameters such as maximum outside diameter,
attenuation over the desired frequency range, flexibility, and
shield type. See paragraph 3.5 in Section 3 for more informa­tion on cable parameters and how they affect performance.

• Additional accessories as ordered

1-2

2

Connections and Installation

2.1 Introduction

WARNING

The procedures in this section are intend­ed for qualified service personnel only. Do
not perform these procedures unless you
are qualified to do so. Failure to recognize
and observe normal safety precautions
could result in personal injury or death.

This section includes information on making connections to
the Model 7017 and installing the card in the Model 7001/
7002 Switch System.

2.2 Handling precautions

To maintain high-impedance isolation between channels,
care should be taken when handling the card to avoid con­tamination from such foreign materials as body oils. Such
contamination can reduce isolation resistance. To avoid pos­sible contamination, always grasp the card by the side edges
or covers. Do not touch board surfaces, components, or con­nector insulators.

Dirt build-up over a period of time is another possible source
of contamination. To avoid this problem, operate the card in
a clean environment. If the card becomes contaminated, it
should be thoroughly cleaned as explained in paragraph 4.2.

2.3 Connections

The following paragraphs provide information for connect­ing external test circuitry to the Model 7017.

2.3.1 Simplified schematic

Figure 2-1 shows a simplified schematic diagram of the
Model 7017. The card is arranged into two separate multi­plexers, each with four channels.

2.3.2 Card configuration

Figure 2-2 shows the general configuration of the Model

7017. Connectors include:

• IN 1-8 (channels 1-8): Each input is equipped with an
SMA coaxial connector. The center conductor is the
signal path, while the outer shell is connected to signal
common.

• OUT A and OUT B: Each multiplexer is equipped with
an SMA coaxial connector. The center conductor is the
signal path, and the shell is connected to signal com­mon. Banks A and B common are isolated.

2-1