Keithley 7999-6 User manual

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Model 7999-6GPIB RF Relay Unit
Instruction Manual
A GREATER MEASURE OF CONFIDENCE
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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 Keithley headquarters in
Cleveland, Ohio.You 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, INCLUD-
ING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
THE REMEDIES PROVIDED HEREINARE 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 DAMAGESARISING 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 DAM-
AGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLATION,
LOSSES SUSTAINED AS THE RESULT OF INJURY TOANY PERSON, OR DAMAGE TO PROPERTY.
BELGIUM: Keithley Instruments B.V. Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02/363 00 40 • Fax: [phone]
CHINA: Keithley Instruments China Yuan Chen Xin Building, Room 705 • 12Yumin Road, Dewai, Madian • Beijing 100029 • 8610-62022886 • Fax: [phone]
FRANCE: Keithley Instruments Sarl 3, allée des Garays • 91127 Palaiseau Cedex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Keithley Instruments GmbH Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Keithley Instruments Ltd Unit 2 Commerce Park, Brunel Road • Theale • Reading • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Keithley Instruments GmbH Flat 2B, WILOCRISSA • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Keithley Instruments s.r.l. Viale S. Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
NETHERLANDS: Keithley Instruments B.V. Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWITZERLAND: Keithley Instruments SA Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: Keithley Instruments Taiwan 1 Fl. 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3572-9077 • Fax: [phone]
4/01
Keithley Instruments, Inc. • 28775 Aurora Road • Cleveland, OH 44139 • 440-248-0400 • Fax: [phone] • http://www.keithley.com
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Model 7999-6 GPIB RF Relay Unit
Instruction Manual
©2001, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
First Printing, April 2001
Document Number: 7999-6-901-01 Rev. A
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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 sub-
sequent updates.Addenda, which are released between Revisions, contain important change in-
formation that the user should incorporate immediately into the manual.Addenda are numbered
sequentially.When a newRevisionis created, allAddenda 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.
RevisionA (Document Number 7999-6-901-01)............................................................ April 2001
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand names are trademarks or registered trademarks of their respective holders.
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Safety Precautions
The following safety precautions should be observed before using this product and any associated in-
strumentation.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.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for
ensuring that the equipment is operated within its specifications and operating limits, and for ensuring
that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures
and proper use of the instrument. They must be protected from electric shock and contact with hazardous
live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating, for example,
setting the line voltage or replacing consumable materials. Maintenance procedures are described in the
manual. The procedures explicitly state if the operator may perform them. Otherwise, they should be
performed only by service personnel.
Servicepersonnel are trained to work on live circuits, and perform safe installations and repairs of prod-
ucts. Only properly trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are rated Installation Category I and
Installation Category II, as described in the International Electrotechnical Commission (IEC) Standard
IEC 60664. Most measurement, control, and data I/O signals are Installation Category I and must not
be directly connected to mains voltage or to voltage sources with high transient over-voltages. Installa-
tion Category II connections require protection for high transient over-voltages often associated with lo-
cal AC mains connections. The user should assume all measurement, control, and data I/O connections
are for connection to Category I sources unless otherwise marked or described in the Manual.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable con-
nector jacks or test fixtures. TheAmerican National Standards Institute (ANSI) states that a shock haz-
ard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present.
Agood safety
practice is to expect that hazardous voltage is present in any unknown circuit before measuring.
Users of this product must be protected from electric shock at all times. The responsible body must en-
sure that users are prevented access and/or insulated from every connection point. In some cases, con-
nections must be exposed to potential human contact. Product users in these circumstances must be
trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or
above 1000 volts,
no conductive part of the circuit may be exposed.
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 mains. When connecting
sources to switching cards, install protective devices to limit fault current and voltage to the card.
Before operating an instrument, make sure the line cord is connected to a properly grounded power re-
ceptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks be-
fore each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a
separate main input power disconnect device must be provided, in close proximity to the equipment and
within easy reach of the operator.
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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 ca-
pable of withstanding the voltage being measured.
The instrument and accessories must be used in accordance with its specifications and operating instructions
or the safety of the equipment may be impaired.
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.
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 the wire recommended in the user documentation.
The symbol on an instrument indicates that the user should refer to the operating instructions located in
the manual.
The symbol on an instrument shows that it can source or measure 1000 volts or more, including the com-
bined effect of normal and common mode voltages. Use standard safety precautions to avoid personal contact
with these voltages.
The
WARNING heading in a manual explains dangers that might result in personal injury or death. Always
read the associated information very carefully before performing the indicated procedure.
The
CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits, including the
power transformer, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses,
with applicable national safety approvals, may be used if the rating and type are the same. Other components
that are not safety related may be purchased from other suppliers as long as they are equivalent to the original
component. (Note that selected parts should be purchased only through Keithley Instruments to maintain ac-
curacy and functionality of the product.) If you are unsure about the applicability of a replacement component,
call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument
only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Prod-
ucts that consist of a circuit board with no case or chassis (e.g., data acquisition board for installation into a
computer) should never require cleaning if handled according to instructions. If the board becomes contami-
nated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.
!
Rev. 2/01
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SBG 4/9/01
Rev. A
Relay Specifications
CONNECTOR TYPE:
Input: Female SMA connector (on relay).
Output: N-type.
CONTACT LIFE: 5 ×106cycles minimum; 10 ×106typical.
ACTUATION TIME: 15ms.
FREQUENCY RANGE: DC to 4GHz. Relay paths are 50Ωterminated
when open.
INSERTION LOSS: 0.3dB + 0.115
× frequency (in GHz).
ISOLATION: 100dB minimum; 130dB typical.
SWR: 1.2 maximum.
GENERAL
INTERFACE: GPIB (IEEE-488.2) and SCPI.
INDICATORS: Power, relay position status and error LED.
CONTACT CLOSURE COUNTERS: One counter per relay path, up to
10 million counts each, maintained in non-volatile memory.
MAXIMUM COMMON MODE: 42V peak, any terminal to earth.
MAXIMUM SWITCHING SIGNAL: 1W CW, CAT I.
POWER: User-supplied 24VDC (22VDC min., 30VDC max.), 1.8A max.
ENVIRONMENT: Operating: 0° to 40°C, up to 35°C <80% RH.
Storage: –25° to 65°C.
EMC: Conforms with European Union Directive 89/336/EEC.
SAFETY: Conforms with European Union Directive 73/23/EEC.
DIMENSIONS: 429mm long ×133mm wide ×161mm deep (19.00˝ ×
5.25˝ ×6.34˝).
ACCESSORIES SUPPLIED: Instruction manual.
Simplified Schematic
7999-6 GPIB RF Relay Unit
Specifications are subject to change without notice.
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Table of Contents
1 General Information
Introduction ................................................................................ 1-2
Feature overview ........................................................................ 1-2
Warranty information ................................................................. 1-2
Manual addenda ......................................................................... 1-2
Safety symbols and terms .......................................................... 1-3
Specifications ............................................................................. 1-3
Unpacking and inspection .......................................................... 1-3
Inspection for damage ......................................................... 1-3
Handling precautions .......................................................... 1-3
Shipment contents ............................................................... 1-4
Instruction manual .............................................................. 1-4
Repacking for shipment ...................................................... 1-4
Connections ................................................................................ 1-4
2 Connections
Introduction ................................................................................ 2-2
Handling precautions ................................................................. 2-2
Configuration ............................................................................. 2-2
Layout ................................................................................. 2-2
Simplified schematic ........................................................... 2-4
Connections ................................................................................ 2-5
GPIB control connection ..................................................... 2-5
Power connector .................................................................. 2-8
3 Operation
Introduction ................................................................................ 3-2
Maximum signal considerations ................................................ 3-2
Bus operation (GPIB) ................................................................. 3-3
Bus connections .................................................................. 3-3
Primary address ................................................................... 3-3
Programming syntax ........................................................... 3-3
Response messages ............................................................. 3-7
Status model ............................................................................... 3-8
Event register sets ............................................................. 3-10
Enable registers ................................................................. 3-11
Queues ............................................................................... 3-11
Status byte and SRQ ......................................................... 3-13
Service request enable register .......................................... 3-14
Serial polling and SRQ ..................................................... 3-15
Clearing registers and queues ................................................... 3-16
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Programming enable registers .................................................. 3-17
Reading registers ............................................................... 3-17
Common commands ................................................................. 3-18
GPIB commands ....................................................................... 3-26
ROUTe commands ............................................................ 3-26
:CLOSe............................................................................... 3-28
:CONFigure........................................................................ 3-29
STATus commands ............................................................ 3-30
:QUEue............................................................................... 3-30
SYSTem commands .......................................................... 3-32
Manual operation ...................................................................... 3-34
Switching considerations .......................................................... 3-35
Connector integrity ............................................................ 3-35
Voltage Standing Wave Ratio ............................................ 3-35
Path isolation ..................................................................... 3-36
Insertion loss ..................................................................... 3-36
RFI/EMI ............................................................................ 3-36
Errors ........................................................................................ 3-37
4 Service Information
Introduction ................................................................................ 4-2
Handling and cleaning precautions ............................................ 4-2
Handling precautions ........................................................... 4-2
Card and connector cleaning ............................................... 4-2
Performance verification ............................................................. 4-3
Environmental conditions .................................................... 4-3
Recommended equipment ................................................... 4-3
Channel resistance tests ....................................................... 4-3
Replacing components ................................................................ 4-4
Replacement parts ............................................................... 4-4
Replacement precautions ..................................................... 4-5
Soldering considerations ..................................................... 4-5
Relay replacement ............................................................... 4-5
Circuit board removal .......................................................... 4-8
GPIB address .............................................................................. 4-8
5 Replaceable Parts
Introduction ................................................................................ 5-2
Parts list ...................................................................................... 5-2
Ordering information .................................................................. 5-2
Factory service ............................................................................ 5-2
Component layout ...................................................................... 5-2
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List of Illustrations
2 Connections
Figure 2-1 General layout (front panel) ................................................... 2-3
Figure 2-2 General layout (rear panel) .................................................... 2-4
Figure 2-3 Simplified schematic .............................................................. 2-4
Figure 2-4 GPIB control connector ......................................................... 2-7
Figure 2-5 Power connector .................................................................... 2-8
3 Operation
Figure 3-1 Command diagram ................................................................. 3-5
Figure 3-2 Controlling relay connections ................................................ 3-6
Figure 3-3 Status model structure ........................................................... 3-9
Figure 3-4 Standard event status ............................................................ 3-10
Figure 3-5 Status byte and service request (SRQ) ................................. 3-13
Figure 3-6 16-bit status register ............................................................. 3-17
Figure 3-7 Standard event enable register ............................................. 3-20
Figure 3-8 Standard event status register ............................................... 3-21
Figure 3-9 Service request enable register ............................................ 3-23
Figure 3-10 Status byte register ............................................................... 3-25
Figure 3-11 Manual operation ................................................................. 3-34
4 Service Information
Figure 4-1 Channel resistance test connections ....................................... 4-4
Figure 4-2 Model 7999-6 exploded view ................................................ 4-6
Figure 4-3 GPIB address switch example ............................................... 4-9
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List of Tables
2 Connections
Table 2-1 GPIB control connector terminals ......................................... 2-6
Table 2-2 Power connector pinouts ........................................................ 2-8
3 Operation
Table 3-1 Parameter types ...................................................................... 3-4
Table 3-2 SCPI commands — error queue .......................................... 3-12
Table 3-3 Common and SCPI commands — reset registers and
clear queues .................................................................... 3-16
Table 3-4 IEEE-488.2 common commands and queries ...................... 3-18
Table 3-5 :ROUTe subsystem command set ........................................ 3-27
Table 3-6 :STATus subsystem command set ........................................ 3-30
Table 3-7 :SYSTem subsystem command set ...................................... 3-32
Table 3-8 Error and status message ...................................................... 3-37
4 Service Information
Table 4-1 Recommended verification equipment .................................. 4-3
5 Replaceable Parts
Table 5-1 Parts list—electronic components ......................................... 5-3
Table 5-2 Parts list—mechanical parts ................................................... 5-5
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1
GeneralInformation
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1-2 General Information
Introduction
This section contains general information about the Model 7999-6 GPIB RF Relay. The
information is organized as follows:
• Feature overview
• Warranty information
• Manual addenda
• Safety symbols and terms
• Specifications
• Unpacking and inspection
• Connections
If you have any questions after reviewing this information, please contact your local
Keithley representative or call one of ourApplications Engineers at 1-800-KEITHLEY.
Worldwide phone numbers are listed at the front of this manual.
Feature overview
The Model 7999-6 is an IEEE-488 controlled, single or dual, 4 or 6 pole, 19-inch rack
mounted relay unit. Additional features of the Model 7999-6 are as follows:
• N-type bulkhead connectors (insulated)
• +24VDC power connections
• LED indicators for error, power, and relay status
• Operating range to 4GHz (relay dependent)
• Can be upgraded from 4-pole to 6-pole relays
Warranty information
Warranty information is located at the front of this instruction manual. Should your Model
7999-6 require warranty service, contact the Keithley representative or authorized repair facil-
ity in your area for further information. When returning the Model 7999-6 for repair, be sure to
fill out and include the service form at the back of this manual to provide the repair facility with
the necessary information.
Manual addenda
Any improvements or changes concerning the Model 7999-6 or manual will be explained in
an addendum included with the manual. Be sure to note these changes and incorporate them
into the manual.
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General Information 1-3
Safety symbols and terms
The following symbols and terms may be found on the Model 7999-6 or used in this manual.
The symbol indicates that the user should refer to the operating instructions
located in the manual.
The symbol shows that high voltage may be present on the terminal(s). Use stan-
dard safety precautions to avoid personal contact with these voltages.
The WARNING heading used in this manual explains dangers that might result in personal
injury or death. Always read the associated information very carefully before performing the
indicated procedure.
The
CAUTION heading used in this manual explains hazards that could damage the switch.
Such damage may invalidate the warranty.
Specifications
Full Model 7999-6 specifications are included at the front of this manual.
Unpacking and inspection
Inspection for damage
The Model 7999-6 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 remov-
ing the Model 7999-6 from the bag, observe the precautions on handling discussed below.
Handling precautions
• Always grasp the Model 7999-6 by the covers. Do not touch board surfaces or
components.
• After removing the Model 7999-6 from its anti-static bag, inspect it for any obvious
signs of physical damage. Report any such damage to the shipping agent immediately.
• When the Model 7999-6 is not installed and connected, keep the unit in its anti-static
bag and store it in the original packing carton.
!
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1-4 General Information
Shipment contents
The following items are included with every Model 7999-6 order:
• Model 7999-6 GPIB Relay Unit (single or dual 4-pole/6-pole IEEE-488 controlled
relay switch)
• Model 7999-6 Instruction Manual (this manual)
• Additional accessories as ordered
Instruction manual
If an additional Model 7999-6 Instruction Manual is required, order the manual package,
Keithley part number 7999-6-901-00. The manual package includes an instruction manual and
any pertinent addenda.
Repacking for shipment
Should it become necessary to return the Model 7999-6 for repair, carefully pack the unit in
its original packing carton or the equivalent, and follow these instructions:
• Call the Repair Department at 1-800-552-1115 for a Return MaterialAuthorization
(RMA) number.
• Advise as to the warranty status of the Model 7999-6.
• 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.
Connections
The following are available Model 7999-6 connections:
• Power receptacle: 9-pin D-sub connector
• IEEE-488 port (GPIB connector)
• N-type bulkhead connectors
NOTE Refer to Section 2 for detailed connection information.
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2
Connections
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