Keithley 7999-4 Instruction Manual Download Page 1 | Manualshive

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Contains Operating and Servicing Information

Microwave Switch

Instruction Manual

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Summary of Contents for 7999-4

Page 1: ...Contains Operating and Servicing Information Model 7999 4 Microwave Switch Instruction Manual...

Page 2: ...OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRU MENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN A...

Page 3: ...Model 7999 4 SPDT Microwave RS 232 Switch Instruction Manual 1999 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Second Printing December 1999 Document Number 7999 4 901 01 Rev B...

Page 4: ...o the manual Addenda are numbered sequentially When a new Revision is created allAddenda associated with the previous Revision of the manual are incorporated into the new Revision of the manual Each n...

Page 5: ...nt A good 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 responsibl...

Page 6: ...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 shal...

Page 7: ...quency 1GHz 4GHz 8GHz 12 4GHz 18GHz VSWR max 1 1 1 15 1 25 1 35 1 5 Insertion Loss dB max 0 2 0 2 0 3 0 4 0 5 Isolation dB min 85 80 70 65 60 GENERAL INTERFACE RS 232 control 9600 baud 8 data 1 stop R...

Page 8: ...ections 1 4 2 Connections Introduction 2 2 Handling precautions 2 2 Configuration 2 2 Layout 2 2 Simplified schematic 2 4 Connections 2 5 RS 232 Connection 2 5 SMA connectors 2 6 Power connector 2 6 3...

Page 9: ...nce verification 4 3 Environmental conditions 4 3 Recommended equipment 4 3 Channel resistance tests 4 3 Replacing components 4 5 Replacement parts 4 5 Replacement precautions 4 5 Soldering considerat...

Page 10: ...eral layout 2 3 Figure 2 2 Simplified schematic 2 4 Figure 2 3 RS 232 interface connector 2 5 3 Operation Figure 3 1 Toggle relay state switch 3 2 Figure 3 2 Jumper location 3 4 4 Service Information...

Page 11: ...Operation Table 3 1 Jumper positions termination characters 3 3 Table 3 2 Command set 3 5 4 Service Information Table 4 1 Recommended verification equipment 4 3 5 Replaceable Parts Table 5 1 Parts li...

Page 12: ...1 GeneralInformation...

Page 13: ...a single channel Microwave SPDT switch with the following features SMA connectors RS 232 relay control 12V DC power connections Operating range from DC to 18GHZ Warranty information Warranty informat...

Page 14: ...mage the switch Such damage may invalidate the warranty Specifications Full Model 7999 4 specifications are included at the front of this manual Unpacking and inspection Inspection for damage The Mode...

Page 15: ...hipment Should it become necessary to return the Model 7999 4 for repair carefully pack the unit in its original packing carton or the equivalent and include the following information Call the Repair...

Page 16: ...2 Connections...

Page 17: ...care should be taken when handling the switch to avoid contamination from such foreign materials as body oils Such contamination can reduce isolation resistance To avoid possible contamination Always...

Page 18: ...Connections 2 3 NC COM NO J1003 CA 27 20D Cable Assembly RS 232 Port DB 9 connector Power Receptacle 3 pin phoenix Power LED SMA Connectors NC LED NO LED Figure 2 1 General layout...

Page 19: ...m of the Model 7999 4 The schematic is arranged into four sections Power RS 232 interface Relay control Relay RS 232 Interface Power Relay control J1011 DB9 J1003 J1010 3 Pin phoenix jack Power LED NO...

Page 20: ...tor If your computer uses a DB 25 connector for the RS 232 interface an additional cable or adapter DB 25 to DB 9 is required NOTE In the RS 232 interface only pins 2 3 and 5 are used Pins 7 and 8 are...

Page 21: ...n and NC normally closed connections of the relay Power connector Connect the supplied power adapter Model PS 57A to the power connector WARNING To prevent damage to the Model 7999 4 use only the Keit...

Page 22: ...3 Operation...

Page 23: ...ceed the following maxi mum signal level specifications of the switch Maximum voltage 30V DC 42V peak Maximum current 1A DC switched Toggle relay state switch Use this switch to manually toggle the re...

Page 24: ...rogram message transmitted to the controller with any of the following combinations of CR or LF CR Carriage return factory default setting CR LF Carriage return and line feed LF Line feed LF CR Line f...

Page 25: ...3 4 Operation 1 1 Figure 3 2 Jumper location...

Page 26: ...me has run out Close the relay C or c After the closed command is sent a 25msec delay occurs which allows the relay to settle After the relay settles an ASCII 1 is sent over the RS 232 indicating sett...

Page 27: ...m The measurement is shown as ratio to 1 e g a VSWR of 1 2 is actually the ratio of 1 2 1 Refer to the specifications located at the front of this manual for Model 7999 4 VSWR information specificatio...

Page 28: ...ts at high levels if the problem is of sufficient severity EMI can be caused by steady state sources such as radio or TV broadcast signals or some types of electronic equipment microprocessors high sp...

Page 29: ...4 ServiceInformation...

Page 30: ...ing precautions Observe the following precautions when handling the SPDT switch Handle the switch only by the edges and cover Do not touch connector insulators Do not touch any board surfaces or compo...

Page 31: ...humidity of less than 70 Recommended equipment Table 4 1 summarizes the equipment necessary for performance verification channel resis tance tests Channel resistance tests Perform the following steps...

Page 32: ...DMM 2010 MULTIMETER RANGE F 500V PEAK FRONT REAR 3A 250V AMPS HI LO INPUTS 350V PEAK 1000V PEAK SHIFT LOCAL POWER RANGE R SHIFT CH1 REM TALK LSTN SRQ STAT REL FILT 4W BUFFER MATH REAR SCAN TIMER STEP...

Page 33: ...hen using solder on the circuit board observe the following precautions Use an OA based organic activated flux and take care not to spread the flux to other areas of the circuit board Remove the flux...

Page 34: ...5 ReplaceableParts...

Page 35: ...ordering parts be sure to include the following information Switch model number Model 7999 4 Serial number Part description Component designation if applicable Keithley part number Factory service If...

Page 36: ...NG HEADER FRICTON SGL ROW CS 724 3 J1003 cable CABLE ASSEMBLY CA 27 20D J1006 J1009 CONN BERG CS 339 J1010 CONN HORIZ RECEPTACLE 3 PIN CS 943 3 J1011 CONN RT ANGLE MALE 9 PIN CS 761 9 Q101 TRANS NPN S...

Page 37: ...art no Bracket relay 7999 4 304A Cover bottom 7999 4 302A Cover top 7999 4 301A Female screw lock CS 725 Lock nut 4 40KEPNUT Phillips Pan Head Screw 4 40X1 4PPH Phillips Pan Head Screw SEMS black 4 40...

Page 38: ......

Page 39: ...3 Line feed and carriage return 3 3 M Manual addenda 1 2 Maximum signal considerations 3 2 O Opening or closing the relay 3 5 Operation Introduction 3 2 RS 232 3 3 Ordering information 5 2 overview 1...

Page 40: ...to zero Unstable Overload Will not read applied input Calibration only Certificate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measure...

Page 41: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...

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