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3 IEEE-488 Reference
Figure 3-1 IEEE-488 connector ................................................................................................................................... 3-2
Figure 3-2 IEEE-488 connections ................................................................................................................................ 3-2
Figure 3-3 IEEE-488 connector location ..................................................................................................................... 3-2
Figure 3-4 RS-232 interface connector ........................................................................................................................ 3-3
Figure 3-5 Model 6517A status register structure ....................................................................................................... 3-8
Figure 3-6 Standard event status .................................................................................................................................. 3-9
Figure 3-7 Operation event status ................................................................................................................................ 3-9
Figure 3-8 Arm event status ....................................................................................................................................... 3-10
Figure 3-9 Sequence event status ............................................................................................................................... 3-11
Figure 3-10 Trigger event status .................................................................................................................................. 3-12
Figure 3-11 Measurement event status ........................................................................................................................ 3-13
Figure 3-12 Questionable event status ......................................................................................................................... 3-14
Figure 3-13 Status byte and service request (SRQ) ..................................................................................................... 3-16
Figure 3-14 Trigger Model (IEEE-488 bus operation) ................................................................................................ 3-19
Figure 3-15 Standard Event Enable Register ............................................................................................................... 3-29
Figure 3-16 Standard Event Status Register ................................................................................................................ 3-29
Figure 3-17 Service Request Enable Register ............................................................................................................. 3-34
Figure 3-18 Status Byte Register ................................................................................................................................. 3-35
Figure 3-19 ASCII data format .................................................................................................................................... 3-76
Figure 3-20 IEEE754 single precision data format (32 data bits) ............................................................................... 3-76
Figure 3-21 IEEE754 double precision data format (64 data bits) .............................................................................. 3-77
Figure 3-22 Measurement Event Register ................................................................................................................. 3-110
Figure 3-23 Questionable Event Register .................................................................................................................. 3-111
Figure 3-24 Operation Event Register ....................................................................................................................... 3-112
Figure 3-25 Trigger Event Register ........................................................................................................................... 3-113
Figure 3-26 Arm Event Register ................................................................................................................................ 3-113
Figure 3-27 Sequence Event Register ........................................................................................................................ 3-114
Figure 3-28 Measurement Event Enable Register ..................................................................................................... 3-115
Figure 3-29 Questionable Event Enable Register ...................................................................................................... 3-115
Figure 3-30 Operation Event Enable Register ........................................................................................................... 3-116
Figure 3-31 Trigger Event Enable Register ............................................................................................................... 3-116
Figure 3-32 Arm Event Enable Register .................................................................................................................... 3-116
Figure 3-33 Sequence Event Enable Register ............................................................................................................ 3-117
Figure 3-34 Measurement Transition Filter ............................................................................................................... 3-118
Figure 3-35 Questionable Transition Filter ............................................................................................................... 3-119
Figure 3-36 Operation Transition Filter ..................................................................................................................... 3-120
Figure 3-37 Trigger Transition Filter ......................................................................................................................... 3-121
Figure 3-38 Arm Transition Filter ............................................................................................................................. 3-122
Figure 3-39 Sequence Transition Filter ..................................................................................................................... 3-123
Figure 3-40 Key-press codes ..................................................................................................................................... 3-131
D IEEE-488 Bus Overview
Figure D-1 IEEE-488 bus configuration ...................................................................................................................... D-2
Figure D-2 IEEE-488 handshake sequence ................................................................................................................. D-3
Figure D-3 Command codes ........................................................................................................................................ D-6