Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 70xx 7116MWS_901_01C
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Model 7 116~MWS
Microwave Switch System
Instruction Manual
Contains Operating and Servicing Information
WARRANTY
Keithley Instruments, Inc. warrants this product lo he free from deCectsin material and workmanship for a period of I 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 Wmnty period, we will, at our option, cithcr repair or rcplacc any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Kcithlcy headquwtcrs 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 arc warranted Coor balance of the origi-
the
nal warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modilication 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 wew 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, INDI-
RECT, 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 * 440-248-0400 *Fax: 440-248-6168 * http://www.keithley.com
Model 7116-MWS 16-Channel Microwave Switch System
Instruction Manual
01996, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Third Printing, July 1998
Document Number: 7116MWS-901-01 Rev. C
Manual Print History
The print history shown below lists the printing dates of all Revisions and Addenda created toor this manual. The Revision
Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revi-
sions, contain important change inkmnation that the user should incorporate immcdiatcly into the manual. Addenda are num-
bered sequentially. When a new Revision is crcatcd, all Addenda associated with the previous Revision of the manual we
incorporated into the new Revision of the manual. Each new Revision includes a revised copy oi this print history page.
Safety Precautions
The following safety precautions should bc observed before using Users of this product most he protected from electric shock at all
this product and any associated instrumentation. Although some in- Limes. The responsihlc body nest ensue thal users are prevented
struments and acccssorics would normally be used with non-haz- access and/or insulated from every connectloo point. In some cases,
ardous voltages, there are situations where hazardous conditions connections must bc exposed to potential human contact. Product
may bc prcscnt. UXTS in these circumstances most be trained to prolect themselves
from the risk of electric shock. If the circuit is capable of operating
This product is intended for USC qualified personnel who recog-
by at or above 1000 volts, no conductive part of the circuit may he
nize shock hazards and arc familiar with the safety precautions re- exposed.
quired to avoid possible injury. Read tbc operating infoarmation
carefully beforc using the product. As described in the International Electrotechnical Commission
(IEC!) Standard IEC 664, digital multimeter measuring circuits
The types of product users are:
(e.g., Keitbley Models 175A. 199,2000,2OUl, 2002, and 2010) arc
Responsible body is the individual OTgroup responsible for the use Installation Category II. All other instruments' signal terminals are
and maintenance of equipment. and for ensuring that operators are Installation Category I and must not be connected to mains.
adequately uained.
Do not connect switching cards directly to unlimited power circuits.
Operators use the product for its intended function. They must be They are intended to he used with impedance limited sources.
trained in electrical safety procedures and proper use of the instru- NEVER connect switching cards directly to AC mains. When con-
ment. They must he prolected from electric shock and contact with necting sources to switching cards, install protective devices to lim-
hazardous live circuits. it fault torrent and voltage to the card.
Maintenance personnel perform routine procedures on the product Before operating an instrument, make sore the line cord is connect-
to keep it operating, for example, setting the line voltage or replac- ed to a properly grounded power receptacle. Inspect the connecting
ing consumable materials. Maintenance procedures are described in cables, test leads, and jumpers for possible wear, cracks, or breaks
the manual. The procedures explicitly state if the operator may per- before each use.
form them. Otherwise, they should he performed only by service
perS"""el. For maximum safety, do not touch the product, test cables, 01 any
other instroments while power is applied to the circuit under test.
Service personnel are trained to work on live circuits, and perform ALWAYS remove power from the entire test system and discharge
safe instatIations and repairs of products. Only properly trained ser- any capacitors before: connecting or disconnecting cables or jump-
vice personnel may perform installation and service procedures. ers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.
Exercise extreme caution when a shock hazard is present. Lethal
voltage may he present on cable connector jacks or test fixtures. The Do not touch any object that could provide a torrent path to the
American National Standards Institute (ANSI) states that a shock common side of the circuit under lest or power line (earth) ground.
hazard exists when voltage levels greater than 30V RMS, 42.4V Always make measurements with dry hands while standing on a
peak, or 60VDC are present.A good safety practice is to expect dry, insulated surface capable of withstanding the voltage being
that hazardous voltage is present in any unknown circuit before measured.
measuring.
Do not exceed the maximum signal levels of the instruments and ac- lnslrumcntation and accessories shall not be connected to humans.
cessories, as dcfincd in the specilications and upcrating informa-
tion, and as shown on tbc instrument or test fixture panels, or Before performing any maintenance, disconnect the line cord and
switching card. all test cables.
`To maintain protection from electric shock and fix, rcplacemcnt
When fuses are used in a product, replace with same type and rating
components in mains circuits, including the power transformer, test
for continued protection against fire hazard.
leads, and input jacks, must be purchased from Kcithley Instrw
merits. Standard fuses, with applicable national saCety approvals,
Chassis connections must only be used as shield connections for
may be used if the rating and type are the same. Other components
measuring circuits, NOT as safety earth ground connections.
that are not safety related may be purchased from other suppliers as
long as they are equivalent to the original component. (Note that se-
If you arc using a test fixture, keep the lid closed while power is ap-
lected parts should be purchased only through Keithley Instruments
plied to the device under test. Safe operation requires tbc USCof a
to maintain accuracy and functionality of the product.) If you are
lid interlock.
unsure about the applicability of a replacement component, call
technical support for information.
Ifa@ screw is prcscnt, connect it to safety earth ground using the
wire recommended in the user documentation.
To clean the instrument, use a damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply
The A symbol on an instrument indicates that the user should rc-
cleaner directly to the instrument or allow liquids to enter or spill
fer to the operating instructions located in the manual.
on the instrument.
Then symbol on an instrument shows that it can sowcc or mea-
sure 1000 volts or more, including tbc combined effect of normal
and common mode voltages. USC 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 infor-
mation 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.
Table of Contents
1 Installation
Introduction ....... ...... ...... I-I
7116.MWS installation instructions ....... ...... ...... 1-I
Parts list ....... ...... ...... 1-2
Rack preparation ....... ...... ...... 1-2
System installation ....... ...... ...... l-3
System earth ground installation ....... ...... ...... 1-3
Semi-rigid coax cable installation ....... ...... ...... 1-4
2 Operation
Introduction ................... ....... 2-1
Operating instructions ........... ....... 2-2
7020-MWS configuration ........ ....... 2-3
3 Service
Introduction .._....._.... .......... ...... 3-l
Troubleshooting .......... ...... 3-l
Troubleshooting equipment .......... ...... 3-i
Troubleshooting procedure .......... ...... 3-l
Ordering information .......... ...... 3-2
Factory service .......... ...... 3-2
Engineering drawings .......... ...... 3-2
List of Illustrations
1 Installation
Figure I-1 Fastener installation ..................................................................... l-2
Figure l-2 Mounting kit installation .................................................................. l-3
Figure 1-3 Cable installation ....................................................................... 1-4
2 Operation
Figure 2-I Tree switching network 2-l
List of Tables
1 Installation
Table l-l Model 7116.MWS rack assembly parts l-2
2 Operation
Table 2-l Model 7001 outputs, memory locations, and commands 2-2
3 Service
Table 2-1 Troubleshooting procedure ,_.,_.__,,,.,,,,..........._.....................,.........._... 3-2
ii
Introduction
The Model 7116-MWS 16-Channel Microwave Switch System provides an integrated solution for multiplexed signal routing
of microwave signals at frequencies up to 18GH.z. The Model 71 I6-MWS switch system can be used to test wireless telecom-
munication devices and systems such as cellular phones, cordless phones, pagers, antenna systems, base stations, and other
wireless transmission productions.
It consists of:
- Five 1x4 microwave RF multiplexer switch modules
* A Model 7020.MWS switching card
* A Model 7001 switching mainframe
* An off-line power supply
. Semi-rigid cables
7116-MWS installation instructions
WARNING
The information on the following pages is intended for qualified service personnel only. Do not attempt
these procedures unless you are qualified to do so.
CAUTION
To prevent flexing of the connections and possible damage, ensure that the Model 7020~MWS card is
secured with its thumbscrew to the Model 7001 rear panel, and that the cable assembly is secured with
its two screws to the 7020-MWS card.
l-l
Table I-l
Model 7116MWS rack assembly parts
Keithley
Quantity Description part number Function
2 Bracket, rear support BR-21 Attaches chassis rear to rear rack rails.
4 I O-32 Kept"" I O-32 KEPNUT Attaches rear support brackets to chassis.
4 IO-32 x % Phillips pan head screw 10-32x3/8 PPM
8 Fastener, captive nut FA-148 Attachcs rear support brackets and front
8 IO-32 x % Phillips pa" head screw 10-32x5/8 PPH panel to rails.
I IO-32 x % Phillips pa" head sems screw 10-32.x3/8 PPHSEM Connect ground cable to earth ground.
2 Semi-rigid cable 7116-307-I
2 Semi-rigid cable 7116-307-2
Parts list
Table l-l lists the parts supplied with the Model 71 I6-MWS 16.Channel Microwave Switch System.
Rack preparation
I. Select a location in the rack. The assembly will take up to 5% inches of vertical space
2. Hold up the system at the selected location in the rack. The four slotted mounting holes in the front panel dictate the location
of the captive ""t fasteners on the front rack rails. Mark where the fasteners are to be installed.
3. Referring to Figure I- I, install four fasteners so the captive nuts are located behind the appropriate holes on the front rack rails.
.J
Front Rack
Rail
Figure 1-I
Fastener installation
1-2
System installation
Refer to Figure l-2 to install the chassis and support brackets in the rack,
10-32x 318PP 24" PowerSuppI
&
#IO-32KEynut
Figure Z-2
Mounting kit installation
I, Loosely attach lhe rear support brackets to the chassis with kepnuts and lo-32 x % screws.
2. Position the chassis assembly in the rack to adjust the support brackets, and note the location for the captive nul fasteners
on the rear rack rails.
3. Install four fasteners so the captive nuts arc located behind the appropriate holes on the rear rack rails.
4. Loosely attach the chassis assembly to the front and rear rack rails with 10-32x % saews. Secure the rear support brackets
to the chassis.
5. Tighten all screws.
WARNING
The Model 7116~MWS must be separately connected to a safety earth ground to maintain protection
against possible shock hazard. Failure to connect the unit to a safety earth ground may result in per-
sonal injury or death due to an electric shock.
System earth ground installation
1, Remove all power from the system.
2. Connect the loose end of the six foot green/yellow ground cable to a quality ground located within your facility using the
#I 0 screw provided.
1-3
Semi-rigid coax cable installation
WARNING
Contact with exposed conductors carrying RF power may cause burns. Place protective caps on all un-
used switch inputs. All cables and connectors should be properly mated and shielded.
I. Remove all power from the system.
2 Remove the plastic protective caps from the switch inputs shown in Figure l-3. Leave Lhc olher caps on. Saw Lhc removed
caps for l'ulurc USC.
Conneci the cables to the switches as shown in Figure l-3 and tightcn using a VIS inch wrench, to 7. IO
in.-lb.
Figure Z-3
Cable installation
1-4
2
Operation
Introduction
The Model 7116-MWS system is a 16.input microwave mulliplexer. Sixteen inputs are achieved by connecting five single-pole,
four-throw switches together forming a tree switching network as shown in Figure 2-l.
Figure 2-z
Tree switching network
2-l
Operation
Operating instructions
To selecl an input channel, the Model 7001 must close tw" switches at the same time. Table 2-l lists which Model 7020.MWS
digital outputs must be activated to select each respective RF input. The table also shows 7001 channels used to sclcct the inputs.
Table 2-Z
Model 7001 channels und memory locutionsfor lx16 multiplexer
--
7116-MW!
7020-MWS Digital Outputs
T 7001
7001
Memory 7116-MM 7s
Input Bank A Bank B Bank C Bank D Channels Location Relays
-
Ch. 1 OUT 1 OUT 21 1!1,1!21 Ml
Ch. 2 OUT 2 OUT 21 I !2,1!21 M2 Kl.K5
Ch. 3 OUT 3 OUT 21 1!3,1!21 M3
Ch. 4 OUT 4 OUT 21 1!4,1!21 M4
Ch. 5 OUT 5 OUT 22 1!5,1!22 MS
Ch. 6 OUT 6 OUT 22 1!6,1!22 M6 K2, K5
Ch. 7 OUT 7 OUT 22 1!7,1!22 M7
Ch. 8 OUT 8 OUT 22 I !8,1 !22 MX
Ch. 9 OUT 9 OUT 23 1!9,1!23 M9
Ch. 10 OUT 10 OUT 23 1!10,1!23 Ml0 K3, K5
Ch. 11 OUT11 OUT 23 1!11,1!23 Ml1
Ch. 12 OUT 12 OUT 23 1!12,1!23 Ml2
Ch. 13 OUT 13 OUT 24 1!13,1!24 Ml3
Ch. 14 OUT 14 OUT 24 1!14,1!24 Ml4 K4, KS
Ch. 15 OUT 15 OUT 24 1!15,1!24 Ml5
Ch. 16 OUT 16 OUT 24 1!16,1!24 Ml6
Outpul patterns for each input are stored in the Model 7001 memory al the factory. The user can call up memory locations to
select each input. For example, calling up memory location 1 selects input 1. Some programming examples are listed below.
NOTE
In either configuration of the Model 7116.MWS, as one I x I6 multiplexer ol; with the semi-rigidjumper cables
removed, as Jive I x 4 multiplexers, ensure that only one channel is closedper relay, and that no more than two
relays are energized simultaneously per bank.
For further information on operation and programming, refer to the Models 7001 and 7020 Instrwtion Manuals
2-2
Operation
Power Limits
The Model 7020-MWS card is a modified version of the Model 7020 Digital I/O Interfacc Card. Among other changes, the output
protection network has hecn removed for greater sink current capacity.
CAUTION
This card is not intended for use in applications other than the Model 7116-MWS system. The 7020.
MWS and 7020 cards are not interchangeable. Damage or unintended operation may result if a Model
7020 is substituted for a 7020-MWS.
NOTE
A hank refer,~ to the internal IC that is used to drive eight output channels. The card uses five driver ICs
(banks) to accomodate the 40 output channels. The outputs are grouped asfollowsfor each bank:
Bank A = OUT 1 through OUT 8
Bank B = OUT 9 through OUT 16
Bank C = OUT 17 through OUT 24
Bank D = OUT 25 through OUT 32
Bank E = OUT 33 through OUT 40
2-3
Operation
2-4
3
Service
Introduction
The following paragraphs contain troubleshooting and replacement parts information. Schematic diagrams, and component lay-
out drawings for the Model 7116.MWS chassis arc also included. Refer to Model 7001 and 7020 manuals for further informa-
tion about these components.
Troubleshooting
WARNING
The information in this section is intended for qualified service personnel only. Some of the procedures
may expose you to hazardous voltages that could result in personal injury or death. Do not attempt to
perform these procedures unless you are qualified to do so.
Troubleshooting equipment
The Model 2000 Digital Multimeter is recommended for troubleshooting
Troubleshooting procedure
Table 3-l summarizes the procedure Coor
verifying operation of the Model 7116.MWS. Refer to the system schematic and the
chassis wiring diagram (drawing number 7116.051) for component locations.
3-1
Table 3-I
Troubleshooting procedure
T
step
I
Item/component
Chassis 4
Required condition
I Comment
All voltages rcfcrenccd to chassis
2 Kl-KS, pin COM < 29VDC Relay coil voltage
3 KI pin I, K5 pin I < I .5v Close channel I
4 KI pin 2, K5 pin 1 < 1.5v Close channel 2
5 Kl pin 3, K5 pin I < 1.5v Close channel 3
6 KI pin 4, K5 pin I < I .5v ClOSCchannel 4
7 K2pinl,K5pin2 < 1.5v Close channel 5
8 K2 pin 2, K5 pin 2 < 1.5v Close channel 6
9 K2 pin 3, K5 pin 2 < 1.5v Close channel 7
10 K2 pin 4, K5 pin 2 < 1.5v Close channel 8
11 K3pinl,K5pin3 < 1.5v Close channel 9
12 K3 pin 2, K5 pin 3 < 1.5v Close channel 10
13 K3 pin 3, K5 pin 3 < 1.5v Close channel 11
14 K3 pin 4, K5 pin 3 < 1.5v Close channel 12
15 K4pin l,K5pin4 < 1.5v Close channel 13
16 K4 pin 2, K5 pin 4 < 1.5v Close channel 14
17 K4 pin 3, K5 pin 4 < l.SV Close channel 15
IX K4 pin 4, K5 pin 4 < 1.w Close channel 16
YrE: see ble for information clos channels.
2-1 on
Ordering information
To place an order or to obtain information concerning replacement parts, contact your Keithlcy representative or the factory.
When ordering parts, be sure to include the following information:
. Model numbers 7116-MWS, 7020.MWS, and 7001
- Serial number OC chassis, card, or mainframe
the
- Part description
* Circuit designation (if applicable)
* Keithley part number
Factory service
If the Model 7116.MWS system must be returned to Keithley for repair, perform the following:
1. Call the Repair department at 1-800-552-I 115 for a Return Material Authorization (RMA) number.
2. Complete the service form at the back of this manual and include it with the card.
3. Carefully pack the card in the original packing carton.
4. Write ATTENTION REPAIR DEPT and the RMA number on the shipping label.
Engineering drawings
The Model 7116.MWS schematic (7116.MWS-406). chassis assembly (7116.050), and chassis wiring (7116.051) drawings
are included on the following pages.
3-2
Service Form
Model No. Serial No. Date
Name and Telephone No.
Company
List all control settings, dcscribc problem and check boxes that apply to problem.
0 Intermittent 0 Analog output follows display a Particular range or function bad; specify
u IEEE failure 0 Obvious problem on power-up 0 Batteries and fuses are OK
m Front panel operational m All ranges or functions are bad a Checked all cables
Display or output (check one)
Ll Drifts n Unable to zero
0 Unstable 0 Will not read applied input
0 Overload
a Calibration only u Certificate of calibration required
0 Data required
(attach any additional sheets as necessary)
Show a block diagram of your measurement system including all instruments connected (whether power is hzned on or not).
Also, describe signal source.
Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.)
What power line voltage is used? Ambient temperature? "F
Relative humidity? Cther?
Any additional information. (If special modifications have been made by the user, please describe.)
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44 I39
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