USER MANUAL pickering
Contents
1. CANTONS 0 0 2 2600099888098 000 000 000 000 000000 000 UTU Q OO 0 9 Secma C B A 000 4 MF dH Fig 8 8 Relay PCB Layout 20 520 20 525 SWITCHING MATRIX MODULE pickering 36 System 20 Relay Card inter PCB connectors from component side NC NC TST2 NC SERCLK 14a TSTGND IGIDATA 13c MODDATA 14c RDATAS GND 1 INH RDATA4 STRB1 RDATA3 LDATA LCLK RDATA2 STLD 13a GND 1a c LCLK DIO8 11c REN 12a DIO6 106 DIO7 11 Secondary connector ATN 9a 0105 10a IFC 8a SRQ 8 NRFD 7a NDAC 7c EOI 6a DAV 6c DIOS 5 0104 5c DIO1 4a DIO2 4c 5v 3a C GND 1a VSEL 12v 4c VREL Primary connector backplane bus pin connects in brackets Note Pin numbering is PIL convention only not industry standard Parts List for GPIB86 Relay 1 Pole PCB Assembly PCB PIL Part2. The operation is similar for 16 x 4 and all double pole versions Please contact factory if you require further information or assistance module can also be returned to Pickering for modification ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 4 20 520 20 525 SWITCHING MATRIX MODULE pickering a Section 10 Electrical Environmental Mechanical amp Firmware Specifications Environmental Operating Temperature 0 to 50 C Storage Temperature 20 C to 75 C Humidity 95 non condensing Weight Dimensions and Power Requirements Approx Weight g 1000 Dimensions mm T Front Panel Width 60 5 Height 268 Overall Length 189 Power Current Consumption Maximum 250 mA 1000 Minimum 150 0 Approx dimensions Standard 160mm 6U Eurocard as specified in DIN 41494 Voltage Supplies Logic Supply 5Vdc 5 Relay Supply 12Vdc 10 Current Firmware Revision 2 00 ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 43 20 520 20 525 SWITCHING MATRIX MODULE pickering 4
3. 20 520 20 525 pickering SWITCHING MATRIX MODULE Section 5 Connector Pin Out Diagrams Analogue 2 1 Analogue 2 2 Analogue 2 3 Ground Analogue 2 4 Analogue 2 5 Analogue 2 6 Ground Analogue 2 7 Analogue 2 8 Analogue 2 9 Ground Analogue 2 10 amp contacts are commoned All Analogue 2 11 analogue bus lines are surrounded Analogue 2 12 by a grounded guard track to Ground minimise inter channel crosstalk IL i i a LE IX LX NO OBR ND O Analogue 2 13 Analogue 2 14 Analogue Bus Approximate RF Analogue 2 15 Characteristic Impedance 65Q Ground Analogue 2 16 Analogue 2 17 Analogue 2 18 Ground Analogue 2 19 Analogue 2 20 Analogue 2 21 Ground Analogue 2 22 Analogue 2 23 Analogue 2 24 Ground 0000000 ND OOOOOOOO A O Fig 5 1 24 Pole Internal Analogue Bus Connector Type 64 Pin DIN 41612 ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 19 gt O 12V relay POWER SUPPLIES 5V logic SRQ Reserved Parallel and Serial Bus DIO6 DIO8 Reserved SS Reserved MOSI Analogue 1 1 Analogue 1 2 Analogue 1 3 Analogue 1 4 Analogue 1 5 Analogue 1 6 ANALOGUE BUS Analogue 1 7 Analogue 1 8 Analogue 1 9 24 Analogue 110 ______ Slot Ad
4. Diagramme vr 25 Section 9 Adapting Matrix for Analogue Bus Connection 41 Section 10 Electrical Environmental Mechanical amp Firmware Specifications 43 ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 3 20 520 20 525 SWITCHING MATRIX MODULE pickering a H Section 1 High Density Matrix Modules 1 1 Features High Isolation RF Switching Matrix Available in 16 x 4 and 8 x 8 Configurations e Single Pole Version Available in 500 or 750 Version with 100MHz Bandwidth Double Pole Version Available with 500 Triaxial Connectors e Full Matrix Self Test for Total Switch Contact Confidence On Board Isolation Switches Remove Unused Crosspoint Rows Columns e Large Low Frequency Matrices Easily Built Up Using Internal 24 Pole Analogue Bus e Up to 31 Matrix Modules May Be Cascaded to Form Matrices with Sizes to Over 2000 Crosspoints e Very Large Partially Filled Matrices May Be Constructed When Used In Conjunction with 20 700 Series RF Multiplexer Modules e Front Panel Mounted BNC Co Axial Connectors e Two Reed Switch Types Standard Dry or Ruthenium Switch up to 100Vd c 10W 0 5A 1 2A carry 1 1 1 Matrix Description This manual covers all models in the 20 520 range of Very High Isolation Matrix Modules switching frequencies to beyond 100MHz available in both 500 8 750 versions Also suitable for high accura
5. ML 06 LLvL 3 gt pue NOH sseuppe Ndo 0 08 8189 PI29 JeAuq 02 WelSAS lt 6 Y vacon war 6 __ kisaio 6 6 53 0 6 ___ gt jenas 6 v 5 6 1 lt 6 lt var lt ear 20 520 20 525 SWITCHING MATRIX MODULE pickering 28 sng 91607 u a 2 9 4 S E 20 gt zeng Lewa NIV 2 9 sng 9 7 1 4 S 9 H S uN 21 sng 1 a gt v eea s 900 gt sng 0c z sng gea cold gt 54 geq lp 2 e ous 2 sng E 99 y m AS 00 Eu 2 US 9 HS 3 Sng 2 eyeq por 9 sng 9 1 4 S 9 soia LD ssng e erea a 02 z sng eyed so a e Lold sng 22 0 HS v2 AG 9 JO 19945 Vid 0 08 91940 Jenug 02 16 6 20 520 20 525 R F SWITCHING MATRIX MODULE pickering 6 115340 6 aM cSOVId Sr addy ssoJppy su D ssouppy IMS J e euo J In 3 5 6H 89 9 JO 19945 06 LIL VI SOUDIIMS 1
6. MODULE Section 4 Programming 4 1 Select Module Address Choose module address from 0 30 using the address select switch SW1 on the top ofthe driver card the top screen of the module may need to be removed to reveal the address switch The module address selected in the illustration is 22 i e 16 4 2 22 4 2 Select Module Bank Address When more than one module is used to make up a large matrix see Fig 1 2 where four 20 x 12 modules are used to make up a 40x24 matrix then all matrix units must have the same module address the location of each module within the matrix IS given by its bank address The matrix bank address is composed of two x and y components see Fig 1 3 these determine the individual matrix modules position within the larger matrix The bank address is constructed using 5 bits see diagram 3 bits for x and 2 bits for For example bit settings 0 0 1 0 0 represent bank address x 1 y 0 m E IMS T OCTO E Lol IT JEU Side View Top View There must always be a module present at the base address x 0 y 0 otherwise the matrix will not be recognised by the intelligent interface If there is a problem with any of the modules used to make up a large matrix then an error will be detected use the DIAGNOSTIC query to discover the cause 4 3 Using the Intelligent GPIB Interface Switching matrices are controlled using the MCLOSE and MOPEN commands To close swi
7. curves for all versions of the single pole matrix modules have similar characteristics any differences are shown For further information please contact factory 20 525 MATRIX INSERTION LOSS 0 dB 2 0 dB e 2 4 dB _ Ba 2 8 dB 2 Crosspoints Set 3 2 dB Fit SS SS EE 50MHz 100MHz 150MHz 200MHz 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 9 20 525 MATRIX VSWR RETURN LOSS 1 Crosspoint Set 75Ohm Version _ Return Loss 50MHz 100MHz 150MHz 200MHz 50MHz 100MHz 150MHz 200MHz 20 525 TYPICAL 90 STEP RESPONSE 1 Crosspoint Set 0 4nS 0 8nS 1 2nS 20 520 20 525 pickering SWITCHING MATRIX MODULE Section 2 Constructing Large Matrix Systems 2 1 Creating Large Matrices Each System 20 interface can directly support cascaded matrices up to 128x16 or 32x64 using 16x4 matrix modules or up to 64x32 using 8x8 matrix modules i e up to 31 modules per matrix larger sizes can be supported using multiple System 20 interface modules mounted in separate cases Forming larger matrices is usually only a question of plugging in additional matrix modules a 24 pole guarded analogue bus is provided on the System 20 Analogue Backplane So constructing large matrices is very straight forward no time consuming daisy chained wiring harnesses Further expansion is simply a matter of adding additio
8. draw backs being additional programming complexity and restricted matrix versatility particularly for future unforeseen requirements Please contact Pickering if you wish to discuss your matrix application in greater detail Pickering can build large Matrix systems constructed and tested to your exact requirements especially if your application involves switching RF or very high isolation signals please contact sales office for further details 2 4 Expanding an RF Matrix Using the Analogue Bus If the signals being switches are not RF typically lt 1MHz bandwidth then using the analogue bus will be very straightforward However if RF frequencies gt 1MHz are being switches then particular attention must be paid to matrix interconnection If the analogue backplane bus is used to interconnect two or more matrices switching RF signals then return loss VSWR will be very severely affected e g around 10dB at around 10MHZz insertion loss will also be degraded This is due to the effect of the long bus lines typically 45cm in length Performance can be maximised by interconnecting the matrix modules using the front panel mounted Coaxial connectors or by ordering a system with a reduced length analogue backplane bus e g quarter length However if very low VSWR performance is required when switching RF signals particularly in a large system it may be worth looking at the Pickering Interface s range of RF multiplexers these can be used
9. quality data acquisition usually 2 pole with frequencies 1MHz RF matrices 1 pole to beyond 100MHz telecommunications and video applications 750 impedance and high quality signal routing in functional ATE systems 1 1 3 Front Panel The module front panels are illustrated in Section 6 they comprise of three elements Status Display 4 LED Indicators Power LED Connected to power system supply Active LED On whenever or more matrix switches are closed For a list of all active switches use the VIEW command Self Test LED Active when self test in progress Error LED Indicates that error found during self test Self Test Button Press to initiate a self test this will first disconnect the matrix then perform a full functional self test finally reconnecting the matrix when complete While in progress the Self Test LED will be on if a failure is detected then the Error LED will be set on permanently Use the DIAGNOSTIC command to find the exact cause of any failure referto section 3 for further details NB Self Test button will only respond when matrix is inactive i e no crosspoints set Matrix Connectors Provides connection to and from matrix BNC Co Axial and BNC Tri Axial connectors please refer to Section 6 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 5 Y4 Y5 Y6 Y7 Y8 OM OOOOO tt M 4 gt e LLL the Fig 1 1 Matrix Schematic 8 x 8 2 Pole X
10. run the usual full selftest together with some additional isolation tests followed by 15 minutes of switch rattling the test procedure will then be repeated This process may only be stopped by powering off or holding the manual test button in for several seconds This feature is for factory use where matrix modules are burned in prior to undergoing final test CMS Fig 7 1 Driver Card Configuration Links on SW2 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 23 20 520 20 525 SWITCHING MATRIX MODULE pickering 24 Section 8 Circuit Diagrams Two sets of circuit diagrams and documentation are contained e 8 1 Driver PCB Assembly PCB Layout Circuit Diagram 6 pages Inter PCB Connectors Parts List 8 2 8 x 8 Single Pole Relay PCB Assembly PCB Layout Inter PCB Connectors Parts List e 8 3 8 Double Pole Relay PCB Assembly PCB Layout Parts List ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 25 D 1 Driver PCB Assembly LD4 LD3 SW2 4 8 80600 00 09808 BANK SW1 ADDR 5 DBDD 95 N 009099999999 09 gt led 2 NEN 22 4 22 EN U10 4 R
11. 012998 0 08 149 02 ueis S 20 520 20 525 SWITCHING MATRIX MODULE pickering 30 0 5 O O o0 o gt D CD CD System 20 Driver Card GPIB 80 Rev 0 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 31 lt bna 6 evivau 6 6 4 58 C wiva lt 6 svivau E lt DN lt s8uis _ lt rauis doo jenas GEH 28815 pue sng 190 1 5 pue 28815 sdoo7 jenas Aepuo9es J 10445 Al 6 21 in 8 lt A 6 __la4uN lt lt lt IND ZN doo7 jenas C 71351 C eoia lt lroia 4 _ Ava 6 AS 6 lt 5 lt lt 9 6 v 6 L 9 JO 9 12945 T suonisod eois ud 06 LIVI f S10198UU09 84 SJOJOBUUOD god Jelu SION 0 08 4Id9 p129 Oz WEIS S 20 520 20 525 SWITCHING MATRIX MODULE pickering 32 GPIB80 System 20 Driver Card inter PCB connectors from component side VREL O VSEL 12v LCLK LDATA GND JO RDATA2 STRB2 00210 DIO1 RDATA3 STRB3 DIO4 IO DIO3 RDATA4 STRB4 DAV RDATA5 STRB5 NDAC JO NRFD TS
12. 20 0 o o 1 a D e 691 ld O O 9 5 0 cc oo o 7 0 9 Ne 4 o 9 oa 8 619 hm 2 E 27 55 2 tc 0000999990 2 0 o o 0 ro c ooo eN cc 2 pJe JAG C11 pickering Fig 8 1 Driver PCB Layout 20 520 20 525 SWITCHING MATRIX MODULE pickering 26 16 1115 Ast 29 S24 ES NIS3H 99A JOJA Ast 9 JO 19945 Ajddns 50 1011U09 19598 905 0900 5 0 08 pJe2 90 OZ WEIS S 27 20 520 20 525 R F SWITCHING MATRIX MODULE pickering Sra Sra adit lt Hi Pas o ps lt soviao lt 6 lt lt evivau 6ELLOHYZ X8089 ai lt 5 8 6 lrans 1 re lt leauis 9 lt leguis 9 v f lt m lt il 9 vy uv 2 95313 sna 1 HT LO 0 59958 6S 09 N 19 29 9 v9 Sa addy pra 2 AS 94 lt 1 33 AS 9 JO 2 19945
13. 4 111 E E Characteristic Impedance 50 or 75Q RF Specification For 1 Pole Version Only Maximum Frequency 200MHz Rise Time lt 1nS t Insertion Loss lt 100MHz lt V S W R lt 70MHz gt 1 1 8 t Isolation lt 100MHz gt 5 Crosstalk lt 100MHz gt 60dB Maximum Voltage Maximum Power Maximum Switch Current Maximum Carry Current On Path Resistance Off Path Resistance Noise Differential Thermal Offset e linm Capacitance Open Channel to Ground 40pF Capacitance Selected Channel to Ground 7OpF Capacitance Open Input to Output Expected Life Low Power Expected Life Max Power Switching Time 4pF gt 1x10 ops gt 5x10 ops 10mS Table 1 1 Switching Specification T RF Performance is entirely dependant upon the combination of crosspoints currently selected these figures are for one selected crosspoint only please refer to graphs in Sec 1 4 same 20 520 20 525 pickering SWITCHING MATRIX MODULE 1 2 Matrix Module Model Numbers The following table lists the standard options available with the matrix module Config uration 16x4 16x4 16x4 8x4 8x4 8x8 8x8 Connect Type BNC Coax BNC Triax BNC Coax BNC Coax BNC Triax BNC Coax BNC Coax BNC Triax BNC Coax Imdep No of ance Poles 500 500 750 500 500 750 500 500 750 Dry Reed Switch 20
14. 520 501 20 520 502 20 520 701 20 522 501 20 522 502 20 522 701 20 525 501 20 525 502 20 525 701 Low Level Switch 20 520 521 20 520 522 20 520 721 20 522 521 20 522 522 20 522 721 20 525 521 20 525 522 20 525 21 Configuration Options T Y Y Coordinates connected to analogue bus X X Coordinates connected to analogue bus T Default configuration is no connections to internal analogue bus Further options see notes below Limiting Resistor e g 20 525 701 R Loop Through Option All of the above modules are available with a loop through option see diagram frequently used in the construction of large self terminating RF matrices Please order option L e g 20 525 501 L Further options are available for interconnecting matrix modules to form very large matrices please contact factory to discuss your application in more detail Allreed relay switching modules have the facility for a built in limiting resistor on each switch This can be very useful in preventing high current in rushes which may result in damage to the reed switch These links are normally shorted however when ordering you may specify limiting resistors if you wish option R ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 7 To Self Test Circuit o og gt Fig 1 2 Full Schematic of 16 x 4 Single Pole Matrix Module 104 Relays with 64 used in main Cross Point Matrix ER ET 20 520 20 525 pickering ee SWI
15. DIG 7705 U2 C IC 018 IC DIG 63B03X 19 IC DIG 74HCT139 U4 C IC 024 IC DIG 27256 EPROM U5 DIG TAHCT244 U6 C IC 020 IC DIG 68488P U7 C IC 021 IC DIG 3447 U8 DIG 3447 09 C 10 016 IC DIG 63B21 U10 C IC 037 IC LIN CA3140E Ci CICPIDUS 10uF elect 22 100 3 C CP 010 Cap 22pF C4 010 Cap 22pF CS C CP7 005 Cap 100nF C6 C CP7003 Cap 22uF tant Ci C CP 001 10nF C8 CACP 001 10nF C9 C CP 001 Cap 10nF C10 C CP 001 Cap 10nF eI 271 10 12 001 10 3 001 10 1 C SW 005 DIP Switch 10 pole dip piano key 20 520 20 525 pickering du SWITCHING MATRIX MODULE SW2 C Sw 001 DIP Switch 5 pole dip slide SW3 C SW 004 Switch 1 p button LD 5 004 LED red LD2 C SC 007 LED green LD3 5 004 LED red LD4 C SC 008 LED yellow X1 C MS 000 Xtal 4 00 MHz J1 C CN 097 34 way pin header 2 row gold pl J2 14 way pin header 2 row gold pl J3 J4 C CN 110 6 way pin header 1 row C PC 086 PCB 6U PTH ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 35 8 2 8 x 8 Single Pole Relay PCB Assembly Bupexaid Oc ooo 000 00 0j 000 000000
16. Part Location Number Description Jl J4 C CN 001 Connector DIN 41612 64 Way A C J3 OZON OT Header 14 pin 2 row J2 C CN 000 Header 34 pin 2 row Bl B8 C CN 118 PC Mount Dielectric FeedThru 2 6 50 Fl F8 C CN 118 PC Mount Dielectric FeedThru 2 6 50 Esso C CP 001 10nF RL1 RL98 RF Reed Relay See Sec 1 3 for type U1 U3 C IC 026 IC DIG UCN 5818A C PC 086 PCB 6U 4 Layer ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 37 8 3 8 x 8 Double Pole Relay PCB Assembly 0000000 x AURA RN RA RN AIO 00000000000000000 00000000000000000 so both relays must be removed the pairs are shown Self Tes
17. TCHING MATRIX MODULE 1 3 Reed Switch amp Connector Options summary of these modules capability is in tables 1 1 and 1 2 Additional data is included below 1 3 1 Dry Reed Switch Reed Relay Type 500 1 2 Pole 102M 1 A 12 1D 7501 Pole 101 1 A 12 949D Expected Life gt 10 operations at low current voltage load gt 5 10 at 260mA 28V 1 3 2 Low Level Ruthenium Reed Switch for low level signal use only Reed Relay 500 1 2 Pole 102M 1 A 12 2D 7501 Pole 101 1 A 12 949D SW 2 Expected Life gt 108 operations at low current voltage load NB This switch is not suitable for switching high current loads 1 3 3 Front Panel and Connectors Two connector types are currently available both are front panel mounted 1 Pole Version 16 x 4 Matrix 20 x BNC Coaxial Connector Sockets see Fig 6 1 8 x 8 Matrix 16 x Coaxial Connector Sockets see Fig 6 2 2 Pole Version 16 x 4 Matrix 20 x BNC Triax Connector Sockets see Fig 6 1 8 x 8 Matrix 16 x BNC Triax Connector Sockets see Fig 6 2 Module width is 12 HP 2 4 inches 60 8mm Front Panel layouts are illustrated in Section 6 1 4 Typical RF Performance Plots Single Pole Versions Typical RF Performance Plots for 20 525 501 8 x 8 Single Pole Curves are shown for matrix rows columns with 1 or 2 interconnected crosspoints set For optimum insertion loss and VSWR reflection performance ensure only one crosspoint is set in any one row column Performance
18. TGND INH SRQ IO IFC TST2 TST1 DIO5 IO ATN DIO7 DIOG Secondary connector HEN DIO8 GND STLD LCLK LDATA RDATA1 STRB1 INH GND MODDATA IGIDATA SERCLK NC NC NC Note Primary connector Pin numbering is PIL convention only not industry standard ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 33 Parts List for GPIB80 PCB Assembly PCB PIL Part Part Location Number Description R1 C RS 012 Res 6k8Q 5 1 4W R2 C RS 012 Res 6k8Q 5 1 4W R3 C RS7012 Res 6k8Q 5 1 4W R4 C RS 016 Res 8 SIP 4 x 330R separate R5 C RS 012 Res 6k8Q 5 1 4W R6 C RS7013 Res 9 pin SIP 8 x 10k commoned R7 C RS 012 Res 6k8Q 5 1 4W R8 C RS 013 Res 9 pin SIP 8 x 10k commoned R9 C RS 013 Res 9 pin SIP 8 x 10k commoned R10 C RS 025 Res 22kQ 5 1 4W R11 Res 6k8Q 5 1 4W R12 C RS 024 Res 180kQ 5 1 4W R13 C RS 025 Res 22kQ 5 1 4W R14 C RS 026 Res 470kQ 5 1 4W R15 C RS 027 Res 470RQ 5 1 4W R16 C RS 025 Res 22kQ 5 1 4W R17 C RS 024 Res 180kQ 5 1 4W R18 C IRS 012 Res 6k8Q 5 1 4W R19 C RS 005 Res 180RQ 5 1 4W R20 C RS 024 Res 180kQ 5 1 4W R21 Omit R22 C RS 012 Res 6k8Q 5 1 4W R23 C RS 012 Res 6k8Q 5 1 4W Q1 C SC 001 Transistor BC182L 02 C SC 001 Transistor BC182L 03 C7 8C 018 Transistor RFP 12P08 04 C SC 001 Transistor BC182L RL1 C RL 000 Reed Relay 109 1 A 5 2D RL2 C RL 000 Reed Relay 109 1 A 5 2D RL3 C RL 000 Reed Relay 109 1 A 5 2D RL4 000 Reed Relay 109 1 A 5 2D ul IC
19. cy low frequency instrumentation requiring good isolation noise performance Built In Self Test gives complete switch confidence System 20 High Isolation RF Matrix Modules are intended for easy construction of high performance matrix switching systems modules may be simply cascaded to form matrices of almost any size Connections are made via industry standard BNC connectors Larger low frequency matrices are easily constructed using the internal 24 pole guarded analogue bus Isolation Switches on each module remove all unselected columns and rows from the system maximising both isolation and RF performance Full Self Test is performed both at power up and at any other time either manually or under program control Self Test is of particular importance in large systems where relay contact integrity is a very major consideration In the unlikely event of relay failure either high on state or low off state resistance the front panel will indicate a fault The diagnosis including the position of the suspect relay will be indicated using the DIAGNOSTIC command For a summary of switching capabilities please refer to tables 1 1 amp 1 2 This is a double height module and must be mounted into a double height 6U case Available case types 10 934 10 936 20 930 and 20 935 1 1 2 Applications Main applications will be for very high quality switching where standard matrix units have inadequate RF and isolation performance these include high
20. dress Bit 0 25 Slot Address Bit 1 Slot Address Bit 2 26 I Slot Address Bit POSITION 10 11 12 13 14 15 16 17 18 19 3 5 0000 Slot Address Bit 4 27 Backplane Address Bit 0 LOCATOR Backplane Address Bit 1 28 Backplane Address Bit 2 5V logic 5V logic POWER SUPPLIES 12V relay 12V relay 0000077 GND 10 92 Note The Analogue bus on this connector is not used by any matrix module only multiplexers All analogue bus lines are surrounded by a grounded guard track to minimise inter channel crosstalk Analogue Bus Approximate RF Characteristic Impedance 650 Fig 5 2 Power Control Analogue Bus Connector Type 64 Pin DIN 41612 20 520 20 525 pickering SWITCHING MATRIX MODULE Section 6 Front Panel Layout LED red Module powered on LED green Indicates if any switch is operated LED yellow Self Test Currently Running LED red error found during self test Self Test Switch recessed to prevent accidental operation Fig 6 1 20 520 Front Panel 16 x 4 Matrix ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 21 Fig 6 2 20 525 Front Panel 8 x 8 Matrix 20 520 20 525 pickering SWITCHING MATRIX MODULE Section 7 Reconfiguring Driver Card to Your Application Your multiplexer driver card will leave the factory preconfigured so take great care i
21. ds If self test is run under software control it will firstly clear the whole matrix Manual Test will only function when the module is in a clear state So it is very important to prepare your external instruments and U U T for this During self test all isolation switches are opened so your external circuitry will see only very high resistance inputs When the self test has finished the matrix will be returned to an all clear state i e the previous state will not be Please note that because of the long self test time that your computer may time out waiting for the test result many PC s have default timeouts set to 10 seconds 3 3 Detailed Self Test Reporting using DIAGNOSTIC Query The DIAGNOSTIC query will give an ASCII string detailing any self test failures These will include Logic uP RAM EPROM Relay Drivers Invalid Link Settings etc Relay Coils Open Circuit Coil Switch Contacts High On Resistance Low Off Resistance This string is not intended to be processed by the user s software it is suitable for copying directly onto the screen of your control computer This information will then indicate maintenance required please contact Pickering for further help 3 4 Self Test Limitations Self Test covers all aspects ofthe Matrix Module which are liable to fail innormal use The only exception to this are the following Isolation Relays These switches are used to isolate the matrix fro
22. f you wish to change any of the settings If in doubt contact Pickering for further details 7 1 Universal Driver Card Configuration Links Configuration switches are provided on the driver board at position SW2 on the top edge of the PCB adjacent to the 10 way address selection lever switch The five switches see Fig 7 1 are used as follows Relay Settling Time There are four choices of relay settling time this is to allow for different applications and relay types Relay Settling Time 1 4 0ms 1 0ms default setting 0 5ms 0 0ms T The Settled line is triggered after this delay Matrix Intelligent Isolation Switching This will allow intelligent isolation switching i e only those matrix rows and columns that have an active crosspoint switch will be connected in circuit Note intelligent isolation switching may operate a little slower up to around 5ms per operation because all isolation switches always cold switch Function 1 Pole Switching used for self test only 2 Pole Switching used for self test only Enable Full Self Test 60 Seconds default setting Enable Logic Only Self Test 5 Seconds Enable Automatic Isolation Switching default setting Disable Automatic Isolation Switching 7 2 Repeating Self Test with Burn In Factory Use Only A burn in test facility is built into the module this is initiated by pressing the selftest button until the Active LED goes on around 5 seconds Here the module will
23. m the users external circuitry for this reason they cannot be included in the contact self test routine refer to fig 2 1 These relays always cold switch i e they are always operated without any load as opposed to the matrix switches which always hot switch therefore they should have an expected life in excess of 105 operations These switches will only fail if a very heavy current is passed through the contacts greater than around 3 4A for 10 s of milliseconds see section 5 1 1 this may result in switch weld to either an isolation or matrix switch Please note that all relays including isolation and self test relays are included in the coil test so an open circuit coil or faulty driver IC will be picked up and reported Self Test Relays There are self test relays on every x and y axis on the matrix board if one of these contacts welds very unlikely then all relays on that axis will appear to fail self test 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 15 SELF TEST INITIATED BY POWER ON 5 QUERY MANUAL BUTTON LOGIC TEST LP BOARD RELAY BOARD YES NO RELAY COIL TEST YES CONTACT TEST SWITCH ON STATE RESISTANCE 20 SWITCH OFF STATE RESISTANCE gt 1MQ SELF TEST PASS SELF TEST FAIL ERROR LED ON USE DIAGNOSTIC COMMAND TO GET ERROR MESSAGE Fig 3 1 Self Test Basic Flow Diagram 20 520 20 525 pickering SWITCHING MATRIX
24. nal matrix modules please refer to notes in Section 2 4 All matrix modules in acascaded matrix must have the same primary address their position within the matrix is determined by their bank address see sec 4 2 figs 2 1 amp 2 2 this is set on an additional 5 way dip switch The cascaded matrix is then programmed as a whole the programmer does not need to address each matrix module individually only a pair of coordinates for the required crosspoint need be sent 2 2 Isolation Switches Both the X and Y axes have on board automatic isolation switches In large matrix systems the parasitic capacitance associated with each cross point switch can result in a large capacitance if several matrix modules are interconnected The isolation switches only switch inthose columns and rows on amodule that contain an active switch Thereby keeping matrix capacitance to a minimum this may be important for applications requiring high isolation and crosstalk as well as good insulation resistance NB These isolation switches are also used to remove the matrix from the external circuit when performing self test 2 3 Partially Filled Matrices For users requiring very large matrix systems the cost of a fully populated matrix may prove prohibitive many instances a combination of multiplexer input output and small core matrix may prove quite acceptable This approach may prove to be more effective in terms of both cost and performance the main
25. pickering USER MANUAL Model No 20 520 20 525 R F Matrix Module with Self Test Designed amp Manufactured by Pickering Interfaces Limited Stephenson Road Clacton on Sea Essex 15 4NL England Tel 01255 428141 44 1255 428141 International Fax 01255 475058 44 1255 475058 International Internet www pickering co uk E Mail sales pickering co uk Issue 2 00 June 1996 Copyright 1996 Pickering Interfaces Ltd All Rights Reserved 20 520 20 525 pickering R F SWITCHING MATRIX MODULE If you need assistance with your Pickering Interfaces Switching System Switching problems Programming or Integration within your Test System Please ring Pickering Interfaces and ask for Technical Support Alternatively you may fax email or connect to our Internet Web Site A full set of operating manuals application notes and software drivers 15 available on CD ROM 20 520 20 525 pickering lins SWITCHING MATRIX MODULE Contents Section 1 High Density Matrix Modules 5 Section 2 Constructing Large Matrix 11 Section 3 wa ee 15 Section 4 NN TEE 17 Section 5 Connector PIN OU DIOE ASS 19 Section 6 Front Panel 21 Section 7 Reconfiguring Driver Card to Your Application 23 Section 8 CE
26. ription available using the DIAGNOSTIC command Self Test comprises 3 levels see Fig 3 1 1 Logic Test Checks all logic including on board microprocessor relay drivers etc 2 Relay Coil Test All reed relay coils are checked for continuity 3 Full Contact Test Tests all the relay contacts in the matrix block Two test are undertaken i On state resistance failure test Fails if switch has on state gt 2Q iii Off state resistance test A switch fails if it s isolation resistance is lt 1050 The threshold for contact resistance is preset to approximately 2Q at the factory However this threshold may set to customers precise requirements from 200m2 to 100 If a very low threshold is selected the self test could be used to detect switches which are not failing to operate but which have reached an end of life condition where the contact resistance is starting to rise indicating that the relay is due for replacement NB The contact self test will only check the relay contacts in the core matrix block isolation switches and self test switches are not tested please refer to section 3 4 for further details Note Fault diagnosis on 2 pole matrix modules will identify down to a pair of relays Both these relays must be replaced only the position of the first relay in the pair is given by the REPORT command please refer to Section 8 3 3 2 Self Test Operation Self Test is always run at power on taking approximately 60 secon
27. t Fails are diagnosed down to a pair of reed relays Note above 20 520 20 525 SWITCHING MATRIX MODULE pickering 38 Parts List for GPIB110 RevO Relay 2 Pole PCB Assembly PCB PIL Part Part Location Number Description Jl J4 C7CN 001 Connector DIN 41612 64 Way A C J2 C CN 124 34 Way Mini DIP Transition Connector J3 C CN 128 14 Way Mini DIP Transition Connector Bl B8 C CN 118 PC Mount Dielectric FeedThru 2 6 50 1 8 PC Mount Dielectric FeedThru 2 6 50 1 eZ C CP 003 Cap Tant 22uF 16V 5545011 001 Cap Cer 10nF 50V RL A3 K20 195 196 RF Reed Relay See Sec 1 3 for type RL193 194 197 C RL 057 107 1 C 12 3D Ul U4 C 10 035 IC DIG UCN 5818EPF C PC 110 PCB 60 4 Layer ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 30 20 520 20 525 pickering SWITCHING MATRIX MODULE Section 9 Adapting Matrix for Analogue Bus Connection 9 1 Configuring Matrix for Analogue Bus Connection All RF matrix modules are shipped from the factory configured for front panel interconnection please refer to Sec 2 5 therefore if the analogue bus is to be used then the module should be ordered in that configuration or the module must be modified by the user To reconfigure the matrix module for analogue bus connection for a single pole 8 x 8 matrix Remove all Coaxial Launchers locations B1 B2 B8 on relay PCB e Connect links BB8 to B8 BB7 to 7 BB1 to
28. tch at position X 17 Y 9 on matrix with address 11 MCLOSE 11 17 9 Now to look at status of matrix 11 VIEW 11 will return 17 9 To open last switch and close switches at positions X 1 Y 1 and X22 Y 1 on matrix 11 11 17 9 MCLOSE 11 1 1 MCLOSE 11 2 1 Now to look at status of matrix 11 VIEW 11 will return 1 1 2 1 To reset all switches on matrix 11 ARESET 11 Now to look at status of matrix 11 VIEW 11 will return 0 0 0 0 indicates no coordinates set Note The 10 920 Interface imposes a maximum limit allowing up to 100 crosspoints to be on at any one time this is to prevent the power supply becoming overloaded ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 17 4 4 Instruction Set The Matrix module is very easy to program using the Model 10 920 IEEE 488 2 Interface ARESET a Open all switches on device a MCLOSE a x y Close switch at coordinates x y on matrix a MOPEN a x y Open switch at coordinates x y on matrix a RESET Open all switches on all modules VIEW a View status of device a Self Test Functions DIAGNOSTIC Return diagnostic string self test fail details if any Refer to Sec 3 3 for further details TST Execute Full Self Test IEEE 488 2 query 4 5 Operating Speed Maximum switching frequency is approximately 25mS to open or close any one crosspoint when using the 10 920 IEEE 488 2 Interface Module the higher speed 10 921 interface reduces this time to 10mS
29. to construct very high performance matrix systems Please contact factory for further information or advice ee 20 520 20 525 pickering R F SWITCHING MATRIX MODULE 11 X10 X20 X3 9 X40 X80 Crosspoints Closed are 81 2 y 22 amp x22 y 4 Fig 2 1 Typical Matrix 8 x 8 Single Pole in Use with Automatic Isolation Switching 20 520 20 525 pickering Du SWITCHING MATRIX MODULE 8 x 8 Matrix 13 uoIsuedxe SAID Ajdwis p eui pesn sng euisjuI 901 10 8 YOUMS 8 X 22 614 8 x 8 Matrix 8 x 8 Matrix 8 x 8 Matrix LL sindino 8 ze x 5 gt gt Z 5 CD 3090 1VNV 310d ve pickering 20 520 20 525 SWITCHING MATRIX MODULE pickering 4 5 Section 3 Self Test 3 1 Self Test Function Self Test is invoked at power on taking up to 60 seconds and may also be operated under software TST or via a recessed push button Self Test pass is indicated on a front panel LED with a full pass fail desc
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