General Information Introduction ........................................................................................................................................................ 1-1 Features .............................................................................................................................................................. 1-1 Warranty information ......................................................................................................................................... 1-1 Manual addenda ................................................................................................................................................. 1-1 Safety symbols and terms .................................................................................................................................. 1-1 Specifications ..................................................................................................................................................... 1-2 Unpacking and inspection .................................................................................................................................. 1-2 Inspection for damage .............................................................................................................................. 1-2 Shipment contents .................................................................................................................................... 1-2 Repacking for shipment ..................................................................................................................................... 1-2 Optional accessories ........................................................................................................................................... 1-2 Card Installation Introduction ........................................................................................................................................................ 2-1 Changing card installation access ...................................................................................................................... 2-1 Card installation/removal ................................................................................................................................... 2-2 Getting Started Introduction ........................................................................................................................................................ 3-1 Front panel familiarization ................................................................................................................................. 3-1 LED matrix .............................................................................................................................................. 3-2 Light pen connection ................................................................................................................................ 3-3 LED indicators ......................................................................................................................................... 3-3 Switches/connections ............................................................................................................................... 3-3 Rear panel familiarization .................................................................................................................................. 3-4 Card connections ................................................................................................................................................ 3-6 Overview — matrix design considerations .............................................................................................. 3-6 Connections — instruments to rows ........................................................................................................ 3-6 Connections — instruments to columns .................................................................................................. 3-8 Connections — partial matrix expansion ................................................................................................. 3-8 Multiple application cards ........................................................................................................................ 3-8 Expanding matrix size ...................................................................................................................................... 3-10 Overview — multiple matrix expansion ................................................................................................ 3-10 Backplane row expansion ...................................................................................................................... 3-14 External expansion ................................................................................................................................. 3-14 Control expansion using master/slave configuration ............................................................................. 3-15 System expansion issues ........................................................................................................................ 3-18 Documenting system configuration ....................................................................................................... 3-18 Analog backplane cable construction .................................................................................................... 3-20 Sample expanded matrices .................................................................................................................... 3-20 Basic switching overview ................................................................................................................................ 3-24 Power-up ................................................................................................................................................ 3-24 Selecting make/break and break/make rows .......................................................................................... 3-24 Modifying a relay setup ......................................................................................................................... 3-24 Storing relay setup and applying setup to relays ................................................................................... 3-24 Operation Introduction ........................................................................................................................................................ 4-1 Setup data paths ................................................................................................................................................. 4-1 Power-up procedure ........................................................................................................................................... 4-2 Line power connections ........................................................................................................................... 4-2 Power switch ............................................................................................................................................ 4-2 Power-up self-test and error conditions ................................................................................................... 4-2 Power-up configuration ........................................................................................................................... 4-3 Master/slave power-up ............................................................................................................................. 4-3 Display ............................................................................................................................................................... 4-4 Error LED ................................................................................................................................................ 4-4 IEEE-488 status indicators ...................................................................................................................... 4-4 Crosspoint display LEDs ......................................................................................................................... 4-5 Light pen .................................................................................................................................................. 4-5 Crosspoint display ............................................................................................................................................. 4-6 Modifying ................................................................................................................................................ 4-6 Copying .................................................................................................................................................... 4-6 Operation control ............................................................................................................................................... 4-7 Digital I/O ports ....................................................................................................................................... 4-7 External trigger ........................................................................................................................................ 4-8 Matrix ready output ................................................................................................................................. 4-8 Stand-alone and master/slave .................................................................................................................. 4-9 IEEE-488 bus address ............................................................................................................................ 4-10 Hardware relay settling times ................................................................................................................ 4-10 Self-test .................................................................................................................................................. 4-10 Factory defaults ..................................................................................................................................... 4-10 Selecting switching parameters ....................................................................................................................... 4-10 Programmed settling times .................................................................................................................... 4-11 Make/break and break/make rows ......................................................................................................... 4-11 Triggering ........................................................................................................................................................ 4-11 Sources ................................................................................................................................................... 4-12 Overrun conditions ................................................................................................................................ 4-12 External trigger input ............................................................................................................................. 4-14 Matrix ready output ............................................................................................................................... 4-14 IEEE-488 bus triggering ........................................................................................................................ 4-15 Reset ................................................................................................................................................................ 4-15 IEEE-488 Programming Introduction ........................................................................................................................................................ 5-1 IEEE-488 quick start .......................................................................................................................................... 5-1 Bus cable connections ........................................................................................................................................ 5-3 Interface function codes ..................................................................................................................................... 5-5 Primary address programming ........................................................................................................................... 5-5 QuickBASIC programming ............................................................................................................................... 5-6 Indicator and control aspects of IEEE-488 operation ........................................................................................ 5-7 Error LED ................................................................................................................................................ 5-7 Status indicators ....................................................................................................................................... 5-8 LOCAL/DIGITAL I/O key ...................................................................................................................... 5-9 Concurrent front panel and bus operation ................................................................................................ 5-9 General bus command programming ................................................................................................................. 5-9 Overview .................................................................................................................................................. 5-9 REN (remote enable) ............................................................................................................................... 5-9 IFC (interface clear) ............................................................................................................................... 5-10 LLO (local lockout) ............................................................................................................................... 5-10 GTL (go to local) ................................................................................................................................... 5-10 DCL (device clear) ................................................................................................................................. 5-10 SDC (selective device clear) .................................................................................................................. 5-10 GET (group execute trigger) .................................................................................................................. 5-10 SPE, SPD (serial polling) ....................................................................................................................... 5-10 Device-dependent command (DDC) programming ......................................................................................... 5-11 Overview ................................................................................................................................................ 5-11 A — External trigger .............................................................................................................................. 5-15 B — Matrix ready .................................................................................................................................. 5-16 C — Close crosspoint ............................................................................................................................ 5-17 D — Digital Output ................................................................................................................................ 5-17 E — Edit pointer .................................................................................................................................... 5-18 F — Enable/disable triggers ................................................................................................................... 5-18 G — Data format .................................................................................................................................... 5-19 I — Insert blank setup ............................................................................................................................ 5-24 J — Self-test ........................................................................................................................................... 5-24 K — EOI and hold-off ........................................................................................................................... 5-24 L — Download setups ............................................................................................................................ 5-25 M — SRQ and serial poll byte ............................................................................................................... 5-26 N — Open crosspoint ............................................................................................................................. 5-28 O — Digital output ................................................................................................................................ 5-28 P — Clear crosspoints ............................................................................................................................ 5-29 Q — Delete setup ................................................................................................................................... 5-29 R — Restore defaults ............................................................................................................................. 5-30 S — Programmed settling time .............................................................................................................. 5-30 T — Trigger ........................................................................................................................................... 5-31 U — Status ............................................................................................................................................. 5-32 V — Make/Break ................................................................................................................................... 5-36 W — Break/Make .................................................................................................................................. 5-37 X — Execute .......................................................................................................................................... 5-38 Y — Terminator ..................................................................................................................................... 5-38 Z — Copy setup ..................................................................................................................................... 5-39 Relay command combinations ......................................................................................................................... 5-40 Timing considerations ...................................................................................................................................... 5-40 Principles of Operation Introduction ........................................................................................................................................................ 6-1 Overview ............................................................................................................................................................ 6-1 Reset circuit ............................................................................................................................................. 6-3 Address decoding ..................................................................................................................................... 6-3 Memory .................................................................................................................................................... 6-3 Relay control circuitry ....................................................................................................................................... 6-4 Switching card interface .......................................................................................................................... 6-4 Switching card logic ................................................................................................................................ 6-6 Display circuitry ................................................................................................................................................ 6-8 Display data ........................................................................................................................................... 6-11 Front panel keys ..................................................................................................................................... 6-11 Display interface .................................................................................................................................... 6-11 Refresh display/read keyboard .............................................................................................................. 6-11 Light pen interface ........................................................................................................................................... 6-12 Master/slave circuitry ...................................................................................................................................... 6-13 Serial communication ............................................................................................................................ 6-13 Control signals ....................................................................................................................................... 6-14 Digital I/O ........................................................................................................................................................ 6-14 IEEE-488 bus interface .................................................................................................................................... 6-14 Power supplies ................................................................................................................................................. 6-14 Maintenance Introduction ........................................................................................................................................................ 7-1 Fixed rack installation ........................................................................................................................................ 7-1 Cover removal ................................................................................................................................................... 7-4 Fuse/power supply replacement ........................................................................................................................ 7-4 Battery replacement ........................................................................................................................................... 7-5 Digital I/O power selection (jumper W101) ...................................................................................................... 7-6 Disassembly ....................................................................................................................................................... 7-7 Static sensitive devices ...................................................................................................................................... 7-7 Switching system troubleshooting ..................................................................................................................... 7-8 Recommended test equipment ................................................................................................................. 7-8 Power-up self-test .................................................................................................................................... 7-8 Power supply checks ................................................................................................................................ 7-9 Mother board checks ................................................................................................................................ 7-9 Display checks ....................................................................................................................................... 7-13 Using an extender card .......................................................................................................................... 7-13 Handling and cleaning ..................................................................................................................................... 7-13 Replaceable Parts Introduction ........................................................................................................................................................ 8-1 Parts lists ............................................................................................................................................................ 8-1 Ordering information ......................................................................................................................................... 8-1 Factory service ................................................................................................................................................... 8-1 Component layouts and schematics ................................................................................................................... 8-1 Card Configuration Worksheet I/O Connections Typical output connection schemes ................................................................................................................... B-1 Typical input connection scheme ...................................................................................................................... B-2 IEEE-488 Bus Overview Introduction ....................................................................................................................................................... C-1 Bus description .................................................................................................................................................. C-1 Bus lines ............................................................................................................................................................ C-3 Data lines ................................................................................................................................................. C-3 Bus management lines ............................................................................................................................ C-3 Handshake lines ...................................................................................................................................... C-3 Bus commands .................................................................................................................................................. C-4 Uniline commands .................................................................................................................................. C-4 Universal multiline commands ............................................................................................................... C-5 Addressed multiline commands .............................................................................................................. C-5 Address commands ................................................................................................................................. C-5 Unaddress commands ............................................................................................................................. C-5 Command codes ...................................................................................................................................... C-5 Typical command sequences .................................................................................................................. C-7 IEEE command groups ........................................................................................................................... C-7 Interface function codes .................................................................................................................................... C-8