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8-22 11713A Operating and Service Manual

Servicing the Attenuator/Switch Driver

Troubleshooting the A7 Switch Board Assembly

LOCAL and REMOTE LEDs signify the operating mode of the driver. A
reset circuit clears the LOCAL-REMOTE flip-flop on the A4 remote
local assembly to the local state unless the instrument is in local
lockout. The ON/OFF LED is operated from the +5 Vdc supply.

In remote operation, a bus command sets the listen flip-flop to accept
further bus commands. The listen flip-flop resets when a local command
is given.

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Summary of Contents for 11713A

Page 1: ...Agilent Technologies 11713A Attenuator Switch Driver Operating and Service Manual Part Number 11713 90023 Printed in USA Print Date July 2001 Supersedes August 1999 ...

Page 2: ...t furnished by Agilent Technologies This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without prior written consent of Agilent Technologies Restricted Rights Legend Use duplication or disclosure by the U S Government is subject to restrictions as set forth i...

Page 3: ...yer s facility only upon Agilent Techhnologies prior agreement and Buyer shall pay Agilent Techhnologies round trip travel expenses In all other areas products must be returned to a service facility designated by Agilent Techhnologies For products returned to Agilent Techhnologies for warranty service Buyer shall prepay shipping charges to Agilent Techhnologies and Agilent Techhnologies shall pay ...

Page 4: ...E LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For assistance call your local Agilent Technologies Sales and Service Office refer to Service and Support on page v ...

Page 5: ...894 4414 fax 905 282 6495 Europe tel 31 20 547 2323 fax 31 20 547 2390 New Zealand tel 0 800 738 378 fax 64 4 495 8950 Japan tel 81 426 56 7832 fax 81 426 56 7840 Australia tel 1 800 629 485 fax 61 3 9210 5947 Asia Call Center Numbers Country Phone Number Fax Number Singapore 1 800 375 8100 65 836 0252 Malaysia 1 800 828 848 1 800 801664 Philippines 632 8426802 1 800 16510170 PLDT Subscriber Only ...

Page 6: ...e product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met Instrument Markings When you see this symbol on your instrument you should refer to the instruments instruction manual for important information This symbol indicates hazardous voltages This symbol indicates that the instrument requires alternating current ac input...

Page 7: ... match the available main power source as described in the input power configuration instructions in this manual If this product is to be powered by autotransformer make sure the common terminal is connected to the neutral grounded side of the ac power supply Compliance With German Noise Requirements This is to declare that this instrument is in conformance with the German Regulation on Noise Decl...

Page 8: ...e used as a disconnecting device WARNING This product is designed for use in Installation Category and Pollution Degree 2 per IEC 1010 and 664 respectively Install the instrument according to the enclosure protection provided This instrument protects against finger access to hazardous parts within the enclosure The Instrument does not protect against the ingress of water If this product is not use...

Page 9: ...11713A Operating and Service Manual ix ...

Page 10: ...rd Press Return Softkey Used for simulated keys that appear on an instrument display Press Prior Menu User Entry Used to indicate text that you will enter using the computer keyboard text shown in this typeface must be typed exactly as printed Type LOAD PARMFILE Used for examples of programming code endif ifndef NO CLASS Used for a subdirectory name or file path Edit the file usr 1oca1 bin samp1e ...

Page 11: ...ches 2 9 Figure 2 4 Connections for Coaxial Switches 2 9 Figure 2 5 Connections for Agilent 8761B SPDT Switches 2 10 Connecting to Four Section 2 11 Figure 2 6 Typical Connections for Programmable Four Section Attenuator 2 11 Connecting to Relays 2 12 Figure 2 7 Relay Driving Circuit 2 12 Verifying Performance 2 12 3 Specifications Specifications 3 2 Table 3 1 Specifications 3 2 Supplemental Chara...

Page 12: ...ine Fuse Part Numbers 7 2 Table 7 3 Major Assemblies 7 3 Table 7 4 Major Cables 7 3 Table 7 5 Cabinet Parts 7 4 Module Cover Removal Replacement 7 5 Front Panel Removal Replacement 7 6 Rear Panel Removal Replacement 7 7 A1 Interconnect and Power Supply Assembly Removal Replacement 7 8 A2 Driver Assembly Removal Replacement 7 9 A3 Latch Assembly Removal Replacement 7 10 A4 Remote Local Logic Assemb...

Page 13: ...ied Block Diagram 8 11 Troubleshooting the A1 Interconnect Assembly 8 13 Troubleshooting the A2 Driver Assembly 8 14 Troubleshooting the A3 Latch Assembly 8 16 Troubleshooting the A4 Local Logic Assembly 8 17 Troubleshooting the A5 Handshake and Data Input Assembly 8 18 Troubleshooting the A6 Interface Assembly 8 20 Troubleshooting the A7 Switch Board Assembly 8 21 The A8 power supply line module ...

Page 14: ...echnologies 11713A Attenuator Switch Driver Overview In this chapter you will find Function features and capabilities of the 11713A attenuator switch driver Compatible Agilent Technologies switches and attenuators ...

Page 15: ...tions are made at the rear panel to the ten pairs of current sinking transistors Five contact pairs per set are present at each rear panel multi pin plug This plug mates with the attenuator drive cable The remaining two contact pairs are connected to the banana jacks mounted on the rear panel The banana jacks are available for driving the coaxial switches or for optional applications Each pair of ...

Page 16: ...2A B C 1 port Terminated SP3T 8764A B C 33313A B C Unterminated SP4T 8765A B C D F Opt 024 and 100 33314A B D Unterminated SPDT 8766K 33366K Unterminated SP3T 8767K 33367K Unterminated SP4T 8768K 33368K Unterminated SP5T 8769K 33369K Unterminated SP6T 87104A B C Option 100 Terminated SP4T 87106A B C Option 100 Terminated SP6T 87204A B C Option 100 Terminated SP4T 87206A B C Option 100 Terminated S...

Page 17: ...able 4 1 Accessories Available But Not Supplied Interconnect kit Type N connectors a Agilent 11716A Interconnect kit 7 mm connectors a Agilent 11716B Interconnect kit SMA connectors a Agilent 11716C Attenuator switch driver rear cord wrap kitb Agilent 5062 3995 Viking connector to four ribbon cables to connect up to four switches Agilent 11761A Viking connector to 10 pin DIP connector 60 inches lo...

Page 18: ...w In this chapter you will learn about How to unpack and check your instrument How to contact Agilent Technologies for service Operating requirements for the attenuator switch driver How to set the GPIB address of your instrument How to connect to switches attenuators and relays ...

Page 19: ...ainers and materials or their equivalents Agilent Technologies can provide packaging materials identical to the original materials Refer to Service and Support on page v for the Agilent Technologies nearest you Environmental Limitations 4 Ensure that you meet the environmental limitations for storage and shipment Temperature 55 to 75 C Humidity 90 relative Altitude 15 300 meters 50 000 feet Prepar...

Page 20: ...t to the voltage of the power source or damage to the instrument may result Refer to Figure 2 1 WARNING If this instrument is to be energized via an autotransformer for voltage reduction make sure the common terminal is connected to the earthed pole power source Power Cable In accordance with international safety standards a three wire power cable is provided with this instrument When it is connec...

Page 21: ...e and Fuse Selection a Open the cover door of the line power module Push the fuse pull lever to the left and remove the fuse Refer to Figure 2 1 b Pull out the voltage selector PC board Position the board so that the voltage nearest the actual fine voltage level is on the top left side of the board c Push the board firmly into the module slot d Push the fuse pull back into normal right hand positi...

Page 22: ...e least significant bit There are 32 possible addresses Addresses 0 and 31 are typically reserved for GPIB functions and should not be used IEE 488 1 limits the number of addressable elements instruments to 16 Figure 2 2 GPIB Address Selection GPIB Address Table 2 1 ASCII Address Codes to Decimal Equivalents ASCII Address Codes LISTEN Decimal Equivalents ASCII Address Codes LISTEN Decimal Equivale...

Page 23: ...ue 1 state is 0 0 to 0 4 Vdc and the false 0 state is 2 5 to 5 0 Vdc Programming and Output data format Refer to Chapter 6 Remote Operation Mating connector Agilent 1251 0293 Mating cables available1 Agilent 10833A 1 meter 3 3 ft Agilent 10833B 2 meters 6 6 ft Agilent 10833C 4 meters 13 2 ft Agilent 10833D 0 5 meter 1 6 ft CAUTION The maximum accumulative length of connecting cable for an interfac...

Page 24: ...modified by removing a connector A 9 wire cable with only one connector is also available Refer to Table 1 3 Table 2 2 describes the cable wire colors connector pin numbers and corresponding status of the front panel pushbutton indicators To drive a simple non latching relay only one wire in a pair needs to be used for the ground Refer to Figure 2 7 for a typical relay driving schematic CAUTION Do...

Page 25: ...tor Cable Wire Color Code 1 Red 24 Vdc 2 White Brown Gnd SWITCHE S Connect to S9 and S0 outputs 9 ON ATTEN X 3 S9 A Gray 9 OFF ATTEN X 4 S9 B0 White Red 0 ON ATTEN Y 3 S0 A Grey 0 OFF ATTEN Y 4 S0 B White Red ATTENUATORS X Y 1 5 OFF 5 Violet ON 6 Yellow 2 6 OFF 7 Black ON 8 Green 3 7 OFF 9 Orange ON 10 Blue 4 8 OFF 11 Brown ON 12 White a The ON OFF status of the pushbutton lamps indicates which ca...

Page 26: ...or 8765 series coaxial switches For GPIB command usage refer to Data Message Input Format Connections to Agilent 8762 or 8765 series coaxial switches can also be made to the ATTEN X output or ATTEN Y output refer to Figure 2 6 for connections pin numbers Control can be extended to four eight or 10 switches if S0 and S9 outputs are also used Figure 2 4 Connections for Coaxial Switches GPIB command ...

Page 27: ...ecessary to change the position of Agilent 8761B SPDT RF switches For GPIB command usage refer to Data Message Input Format on page 6 3 Figure 2 5 Connections for Agilent 8761B SPDT Switches GPIB command B9 connects port C and port 2 and turns the front panel LED for pushbutton 9 OFF GPIB command A9 connects port C and port 1 and turns the front panel LED for pushbutton 9 ON ...

Page 28: ...2 Connect both outputs to have more than four attenuator segments Figure 2 6 shows a typical connection for a programmable four section attenuator and illustrates the connection pin number for each connector ATTEN X or ATTEN Y Using these same connections to Agilent 8762 or 8765 series coaxial switches control can be extended to four eight or ten switches if S0 and S9 outputs are also used Figure ...

Page 29: ...for simple non latching relays CAUTION If the total continuous load current of 650 mA is exceeded damage may result Figure 2 7 Relay Driving Circuit NOTE It is also recommended that two 28 7 V zener diodes be connected back to back across the relay coils to reduce voltage transients Verifying Performance 9 Use the procedure for checking the electrical performance of the attenuator switch driver gi...

Page 30: ...3 Specifications Overview In this chapter you will find Specifications which describe warranted performance standards Supplemental characteristics which are non warranted parameters ...

Page 31: ...3 A maximum peak for 1 second 0 65 A maximum continuous current Contact pairs 1 through 8 9 and 0 maximum current of 0 65 A continuous through one or all contacts Power 100 or 120 Vac 5 10 at 48 to 440 Hz 200 or 240 Vac 5 10 at 48 to 66 Hz 80 VA maximum Response Time 10 µs maximum for contact pairs 1 through 8 20 µs maximum for contact pairs 9 and 0 Driver Life 2 000 000 switchings at maximum curr...

Page 32: ...4 Verification Overview In this chapter you will find Recommended test equipment How to verify local operation How to verify GPIB interface remote operation ...

Page 33: ...pment troubleshooting Equipment other than the recommended models can be used provided the minimum specifications are satisfied Table 4 1 Recommended Test Equipment Instrument Type Critical Specifications Usea Digital voltmeter 0 to 30 Vdc T Attenuators 2 required Programmable 4 sections P T Switches 2 required 24 Vdc drive source P T Controller GPIB GPIB compatible P T a P Performance T Troublesh...

Page 34: ...ore you proceed Verify that driver power transformer primary is matched to the line voltage by the Line Voltage Selection Card Check the driver power fuse for correct rating Current fuse ratings for various line voltages are given on the line power module on rear panel Connect the power cable to the power receptacle Procedure 1 Connect the equipment that is to be used in your application as shown ...

Page 35: ...te All numbered pushbutton LEDs should be on and LOCAL LED should be on 3 Depress the 10 numbered pushbuttons on the driver front panel Each LED should alternate between off and on as each key is pressed In addition if any equipment is connected attenuators relays or switches an audible click should be heard from the unit actuated Pressing any numbered pushbutton should not cause any other pushbut...

Page 36: ...on The GPIB interface properly executes the controller s instructions If the driver appears to fail any of the GPIB checks the validity of the above assumptions should be confirmed before servicing the driver If all of these checks are successful the driver s GPIB interface is operating correctly These procedures do not check all of the driver s program codes that can be executed However if the dr...

Page 37: ... then on again Operator s Response Check that the driver s REMOTE light turns ON If it does not the driver failed to process the remote message Receiving the Message This check determines if the driver receives data messages The driver must be in the remote state Check that all front panel LEDs are ON except local when the driver first comes on and is set to the remote state Operator s Check After...

Page 38: ...main ON If not the driver failed to process the Local Lockout message Operator s Response Check that the LOCAL light is ON and REMOTE light is OFF Press numbered pushbutton switches and check that switches change status LEDs on and off If not the driver failed to process the Clear Lockout Set Local message Description Command Local Lockout Send Local Lockout message LOCAL LOCKOUT 7 Description Com...

Page 39: ...Local Operation Overview In this chapter you will find Function and description of front panel controls connectors and indicators Function and description of rear panel controls connectors and indicators ...

Page 40: ...al Local Operation Local Control Local Control Local control of the Agilent 11713A switch driver is accomplished manually from front panel pushbuttons Figure 5 1 and Figure 5 2 detail front and rear panel controls connectors and indicators ...

Page 41: ... mode 2 ATTENUATOR Y In the local mode pushbutton switches 5 6 7 and 8 activate solid state switches current sinks to change the attenuation setting of an attenuator connected to the ATTEN Y connector on the rear panel 5 REMOTE LED When on the remote LED indicates that the driver is in remote control 6 LINE ON LED When on this LED indicates that power is applied to the attenuator switch drives 7 L...

Page 42: ... power cable 11 Line Power Module Assembly 12 This symbol is used to point out a necessary reference for the user 4 24 Vdc Banana jack connector provides the common connection for the 24 Vdc used to drive the coaxial switches 5 S0 A B Banana jack connectors for hook up to the coaxial switches 6 Window Safety interlock fuse cannot be removed while power cable is connected to power receptacle 13 GPI...

Page 43: ...Operation 6 Remote Operation Overview In this chapter you will learn about Remote programming capability of the attenuator switch driver Function and use of GPIB commands in remote mode Programming information to set up desired level of attenuation ...

Page 44: ...driver will respond to the following messages Data Remote Local Lockout and Clear Lockout Set Local Local to Remote Changes The driver switches to remote operation upon receipt of the Remote message The Remote message has two parts Remote enable bus control line REN set true Device listen address MLA received once while REN is true The driver s outputs and all control settings remain unchanged wit...

Page 45: ...rolled by data message on the GPIB Data messages include the driver s GPIB program codes The GPIB program codes contain information for programming the front panel functions except for the LINE switch The driver receives data messages when addressed to listen Receiving the Data Message The driver responds to data messages when in remote and addressed to listen Data Message Input Format The program...

Page 46: ...ach connector pin Table 6 3 shows the programming strings required to set up various three and four section attenuators to the desired levels of attenuation Program Execution Time The response time for the driver is defined as the time between data valid DAV changing from a high to a low and the output signal at the rear panel connector changing state The switching speed of the Agilent Technologie...

Page 47: ...l by the controller NOTE The driver may also be returned to local by turning the driver LINE switch off and then on but this defeats the purpose of the Local Lockout and the system controller loses control Receiving the Clear Lockout Set Local Message The system controller sends a Clear Lockout Set Local message to clear the Local Lockout condition and return all devices to local No instrument set...

Page 48: ...e until it is addressed to listen the first time The output signal is unchanged The front panel REMOTE indicator turns on when in remote mode GTL RL1b Local No The driver does not respond to the Local message Refer to Clear Lockout set Local LLO RL1b Local Lockout Yes LOCAL key is disabled Only the controller can return to the driver to local REN RL1b Clear Lockout Set Local Yes Driver goes to loc...

Page 49: ...put at each connector pin Table 6 2 GPIB Control Statement Results H Open High L Closed Low Connected to ground Front Panel Digits Connector Connector Pin Numbers Command Result A B 1 ATTEN X 5 H L 6 L H 2 7 H L 8 L H 3 9 H L 10 L H 4 11 H L 12 L H 5 ATTEN Y 5 H L 6 L H 6 7 H L 8 L H 7 9 H L 10 L H 8 11 H L 12 L H 9 S9 A 24 VB B 24 V 0 S0 A 24 V B 24 V ...

Page 50: ...67 10 100 A234B1 A678B5 5 50 A14B23 A58B67 11 110 A1234 A5678 0 to 70 dB Attenuation 3 Section Attenuator ATTENUATOR X Pushbuttons 1 2 3 4 ATTENUATOR Y Pushbuttons 5 6 7 8 Attenuator Section dB 10 20 40 Not Used Attenuator Section dB 10 20 40 Not Used Attenuation in dB Attenuation in dB GPIB Program Codes X Y ATTEN X ATTEN Y X or Y ATTEN X ATTEN Y 0 0 B123 B567 40 A3B12 A7B56 10 10 A1B23 A5B67 50 ...

Page 51: ...d replacement of major assemblies in the 11713A attenuator switch driver Module cover Front panel Rear panel A1 interconnect and power supply assembly A2 driver assembly A3 latch assembly A4 remote local logic assembly A5 GPIB handshake and data input assembly A6 interface assembly A7 switch board assembly A8 power module line filter assembly ...

Page 52: ... in the front matter of this manual Table 7 1 Accessories Supplied Table 7 2 Line Fuse Part Numbers Item AgilentPart Number Dual Viking connectors 12 pin conductor 60 inches long 2 8120 2703 Line power cable Part number will varya 11713A Operating and Service Manual1 1713 90023 a The power cable is selected at the factory according to the voltage available in the coun try of destination Line Volta...

Page 53: ...art Number A1 interconnect and power supply assembly 11713 60012 A2 driver assembly 11713 60016 A3 latch assembly 11713 60003 A4 remote local logic assembly 11713 60004 A5 GPIB handshake data input assembly 11713 60014 A6 interface assembly 11713 60010 A7 switch board assembly 11713 60007 A8 power module line filter assembly 0960 0443 Cable Reference Designator Agilent Part Number W1 12 conductor ...

Page 54: ...t panel MP2 5021 8413 1 Front panel MP3 11713 00005 1 Sub panel MP4 5021 8413 1 Rear frame MP5 11713 00012 1 Rear panel MP6 5021 5829 2 Side strut MP7 5021 9253 1 Top cover perforated MP8 5062 3871 1 Bottom cover perforated MP9 5040 8801 2 Foot standard MP10 5040 8803 2 Foot non skid MP12 5001 0538 2 Side trim MP13 1460 1345 1 Tilt stand MP14 7120 4294 1 Label MP15 7120 1254 1 Nameplate ...

Page 55: ...ation Refer to Preparing a Static Safe Work Station in Chapter 8 NOTE Top and bottom covers are removed and replaced similarly To Remove Module Covers 1 Unscrew the one single screw in the middle of the cover flange that holds the cover to the rear panel 2 Slide the cover toward the rear of the module To Replace Module Covers 1 Slide the cover toward the front of the module 2 Tap on the cover to e...

Page 56: ...ttom covers Refer to Module Cover Removal Replacement 2 Remove the four corner screws that hold the front panel to the frame 3 Disconnect the ribbon cable from the A1 interface power supply assembly to the front panel 4 Unscrew the five screws that hold the front panel board onto the front panel frame To Replace the Front Panel 1 Install the front panel board onto the front panel frame using five ...

Page 57: ...o Module Cover Removal Replacement 2 Remove the two screws at the GPIB connector 3 Remove the four comer screws that secure the rear panel to the module 4 Disconnect the ribbon cable from the A1 interconnect power supply assembly to the rear panel 5 Separate the rear panel from the module To Replace the Rear Panel 1 Position the rear panel onto the rear panel frame 2 Connect the ribbon cable from ...

Page 58: ...and rear panels to the A1 interconnect power supply assembly 5 Disconnect the power transformer connector 6 Remove the power transformer by removing the four mounting screws nuts and washers 7 Unscrew the ten small screws and three large screws to separate the A1 interconnect power supply assembly from its frame To Replace the A1 Interconnect Power Supply Assembly 1 Replace the 3 large screws and ...

Page 59: ...rviced at a static safe workstation Refer to Preparing a Static Safe Work Station in Chapter 8 To Remove the A2 Driver Assembly 1 Remove the top cover 2 With a strong upward motion lift the red ring at the top edge of the A2 driver and remove the assembly To Replace the A2 Driver Assembly 1 Gently insert the board into the socket marked A2 with a vertical motion Use balanced pressure from your thu...

Page 60: ...iced at a static safe workstation Refer to Preparing a Static Safe Work Station in Chapter 8 To Remove the A3 Latch Assembly 1 Remove the top cover 2 With a strong upward motion lift the orange ring at the top edge of the A3 latch assembly To Replace the A3 Latch Assembly 1 Gently insert the board into the socket marked A3 latch assembly with a vertical motion Apply balanced pressure with your thu...

Page 61: ...tic safe workstation Refer to Preparing a Static Safe Work Station in Chapter 8 To Remove the A4 Remote Local Logic Assembly 1 Remove the top cover 2 With a strong upward motion lift the yellow ring at the top edge of the A4 remote local logic assembly To Replace the A4 Remote Local Logic Assembly 1 Gently insert the board with a vertical motion into the socket marked A4 remote local logic assembl...

Page 62: ...rviced at a static safe workstation Refer to Preparing a Static Safe Work Station in Chapter 8 To Remove the A5 GPIB Assembly 1 Remove the top cover 2 With a strong upward motion lift the green ring at the top edge of the A5 GPIB handshake data input assembly To Replace the A5 GPIB Assembly 1 Gently insert the board with a vertical motion into the socket marked A5 GPIB handshake data input assembl...

Page 63: ...e both covers Unscrew one screw on each cover and then slide the cover toward the rear 2 Disconnect the ribbon cable from the A1 interconnect assembly to the rear panel 3 Remove the rear panel from the main frame by removing the four corner screws 4 Remove the three screws that secure the A6 interface assembly To Replace the A6 Interface Assembly 1 Use the three screws to install the A6 interface ...

Page 64: ... Unscrew one screw on each cover and then slide the cover toward the rear 2 Disconnect the ribbon cable from the A1 interconnect assembly to the rear panel 3 Remove the front panel from the main frame by removing the four corner screws 4 Remove the five screws that secure the A7 switch assembly to the front panel and remove the board To Replace the A7 Switch Board Assembly 1 Replace the board usin...

Page 65: ...f the transformer wire and the corresponding pin number 3 Desolder the transformer wires and unplug the two wires from the power switch cable 4 Desolder the ground wire on the metallic cover of the unit 5 Remove the rear panel from the main frame by removing the four comer screws 6 Bend the two sides of the assembly to release the lock while gently removing the line filter assembly To Replace the ...

Page 66: ...enuator Switch Driver Overview In this chapter you will find How to prepare a static safe work station How to replace the rear panel fuse Troubleshooting hints for diagnosing common problems Assembly level troubleshooting ...

Page 67: ... strap combination and conductive floor mat and heel strap combination These methods may be used together or separately A list of static safe accessories and their part numbers is given on the following page Figure 8 1 Static Safe Work Station Reducing ESD Damage To help reduce the amount of ESD damage that occurs during installation testing or servicing instruments use the following guidelines Be...

Page 68: ... a lintfree cloth with a solution of 80 electronics grade isopropyl alcohol and 20 deionized water This should be performed at a static safe work station Table 8 1 Static Safe ESD Accessories Order the above by calling any Agilent Technologies Sales and Service Office Agilent Part Number Description 9300 0797 Set includes 3M static control mat 0 6 m x 1 2 m 2 ft x 4 ft and 4 6 m 115 ft ground wire...

Page 69: ...ine power cable from its jack 2 Open the cover door of the line power module 3 Push the fuse pull lever to the left and remove the fuse 4 Replace the fuse with one of the correct rating and type for your selected input ac line voltage Fuse ratings for line voltages are indicated below the power module WARNING Be sure to select the correct fuse rating for the selected line voltage Do not use repair...

Page 70: ...l red banana jack 5 If an attenuator or switch buzzes when actuated by the front panel pushbutton the output transistor may be shorted or one of the protection diodes may be shorted 6 If one of the pushbutton LEDs does not light determine if the pushbutton is operational by checking to see if the circuitry drives an attenuator or switch properly If the switching click of the relay in the attenuato...

Page 71: ...eration the voltage across the series base resistor to the Darlington transistors should be greater than or equal to 0 5 Vdc when the transistor is on 8 To check the driver in remote operation with no external loads connected use an appropriate controller program to execute the following commands NOTE The default address 728 is set at the factory If you are using a different address number replace...

Page 72: ...V 0180 2181 A1C1 capacitor 7200 µF 15 V 0180 2221 A1U1 voltage regulator 1826 0181 A1U2 voltage regulator 1826 0559 A2 driver assembly 11713 60016 A3 latch assembly 11713 60003 A4 remote local logic assembly 11713 60004 A5 GPIB handshake data input assembly 11713 60014 A6 interface assembly 11713 60010 A7 switch board assembly 11713 60007 A8 power module line filter assembly 0960 0443 A8C1 capacit...

Page 73: ...8 8 11713A Operating and Service Manual Servicing the Attenuator Switch Driver Troubleshooting Figure 8 2 11713A Attenuator Switch Driver Top Cover Removed ...

Page 74: ...11713A Operating and Service Manual 8 9 Servicing the Attenuator Switch Driver Troubleshooting Figure 8 3 11713A Attenuator Switch Driver Bottom Cover Removed ...

Page 75: ...al Logic FF Remote Local 2 to 1 Multiplexer CLK J K Inputs FF Driver Storage Registers Address Comparator LLO Detector DAV NRFD NDAC NDIO1 NDIO5 5 V 5 V GPIB Address GPIB Connector REN DIO1 DIO7 RTN IRC DRV NRFD NDAC Address Switches 1 through 5 NDIO1 NDIO5 CLK 1 through CLK 0 1 through 0 DIO1 DIO7 ADDR NLLO Out Control Lines Handshake Out R L Remote Local Qualifier 2 A or B ATTEN X ATTEN Y Attenu...

Page 76: ...either voltage is not acceptable disconnect both ribbon cables to the front and rear panels and remeasure the voltages at TP1 and TP2 5 If the voltages at the test points are still unacceptable replace the Al interconnect assembly Assembly Overview The power supply is enabled when the LINE ON OFF switch is set to the ON position The power supply provides 5 Vdc for the logic circuits and 24 Vdc at ...

Page 77: ...ion do the following a Turn the power off b Open the top cover c Pull out the A2 driver assembly and check the board and its socket for damage d Reinstall the board carefully e Switch the power on f Manually press the attenuator buttons several times The light should come on off each time that a button is activated 3 If the manual verification is satisfactory check the computer controlled remote o...

Page 78: ...The saturated transistor sinks current from the 24 Vdc supply through the load connected to the rear panel of the driver and returns it to ground The open collector outputs are protected against spikes from inductive loads with clamp diodes to both ground and the 24 Vdc supply The driver transistors each have a metal tab that is attached to a common heat sink The relays K1 and K2 provide reversibl...

Page 79: ...7 switch AS GPIB and A4 remote local logic board assemblies in this sequence before replacing the A3 latch assembly Assembly Overview When the driver is in the local mode the J and K inputs to all ten flip flops are in the logic high state The flip flops then operate as toggle flip flops and respond to the front panel pushbuttons The pushbuttons function as clock pulses for the flip flops In the r...

Page 80: ...ppropriate controller to execute the following commands Assembly Overview The remote local flip flop is programmed through the GPIB circuitry on the A5 handshake and data input assembly If the local lockout flip flop is set to a high the remote local flip flop cannot be set to local via the A7 front panel LOCAL pushbutton In all other cases the A7 local pushbutton will set the instrument to local ...

Page 81: ...e the following commands Assembly Overview The three wire handshake lines to the handshake logic circuits synchronize the operation of the driver remote operation The lines are ready for data NRFD data valid DV and data accepted NDAC The handshake logic processes the DAV signal and produces the handshake out FIS OUT signal passed to the bus logic and the local lockout logic The DAV signal and the ...

Page 82: ...terface bus These inputs in conjunction with the HS OUT signal enable the remote local logic and the local lockout logic processes the attenuator switch state codes and select codes present on the DIO lines It then combines them with handshake out HS OUT and remote signals to output the NCLK signal from U11A on the A4 remote local assembly places the driver into remote operation or local operation...

Page 83: ...h in manual and remote operation a Manually press the attenuator buttons several times The light should come on off each time that a button is activated b If the manual verification is satisfactory check the computer controlled remote operation by sending these commands 2 If the response is satisfactory the A6 interface assembly should be operational 3 If the response is unsatisfactory refer to th...

Page 84: ... use the block diagram on page 8 11 to further trace the circuitry Assembly Overview The resistor connected to the 5 volts keeps the input to the multivibrators at a logic high The voltage across the input capacitor is 0 volts when the front panel pushbutton switches are open When a button is pressed the input voltage on the one shot instantaneously drops to 0 volts and starts the output pulse The...

Page 85: ...ating mode of the driver A reset circuit clears the LOCAL REMOTE flip flop on the A4 remote local assembly to the local state unless the instrument is in local lockout The ON OFF LED is operated from the 5 Vdc supply In remote operation a bus command sets the listen flip flop to accept further bus commands The listen flip flop resets when a local command is given ...

Page 86: ...ower receptacle fuse and voltage selector PC board To Troubleshoot the A8 Power Supply Line Module Assembly 1 If the attenuator switch driver does not power on when the line button is pressed ON check that the fuse is good The main ac line fuse is located on the rear panel in the line power module Refer to Fuse Removal Replacement 2 If the fuse is not faulty replace the A8 power supply line module...

Page 87: ...imitations 2 2 ESD 8 2 ESD accessories 8 2 F factory preset address 2 5 features front panel 5 3 front panel control 5 3 features 5 3 pushbuttons 5 3 removal 7 6 fuse removal 8 4 replacement part numbers 7 2 selection 2 4 G GPIB address 2 5 6 3 bus messages 6 6 compatibility 6 2 I initial conditions 4 3 initial setup remote operations 4 5 inspection 2 2 installation 2 1 isolating a malfunction 8 5...

Page 88: ...mote operation check 4 5 remote to local 6 2 replacing major assemblies 7 1 returning your instrument 2 2 S sending messages data 6 4 require service 6 5 status bit 6 5 status byte 6 5 servicing your instrument 2 2 set local message 4 7 supplemental characteristics 3 2 T test equipment 8 5 Troubleshooting 8 5 V verification local operation 4 3 remote operation 4 5 ...

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