iii
2.18.4
Deviation ................................................................................................................................................
2-105
2.18.5
Ratio .......................................................................................................................................................
2-106
2.18.6
Logarithmic ............................................................................................................................................
2-106
2.18.7
Selecting and configuring math .............................................................................................................
2-106
2.18.8
Calculate multiple display ......................................................................................................................
2-107
2.19
Menu ..............................................................................................................................................................
2-107
2.19.1
SAVESETUP .........................................................................................................................................
2-110
2.19.2
COMMUNICATION .............................................................................................................................
2-116
2.19.3
CAL ........................................................................................................................................................
2-117
2.19.4
TEST ......................................................................................................................................................
2-118
2.19.5
LIMITS ..................................................................................................................................................
2-118
2.19.6
STATUS-MSG .......................................................................................................................................
2-120
2.19.7
GENERAL .............................................................................................................................................
2-120
2.20
Scanning .........................................................................................................................................................
2-125
2.20.1
Internal scanning ....................................................................................................................................
2-125
2.20.2
External scanning ...................................................................................................................................
2-125
2.21
Other measurement considerations ................................................................................................................
2-126
2.21.1
Ground loops ..........................................................................................................................................
2-126
2.21.2
Triboelectric effects ...............................................................................................................................
2-127
2.21.3
Piezoelectric and stored charge effects ..................................................................................................
2-127
2.21.4
Electrochemical effects ..........................................................................................................................
2-127
2.21.5
Humidity ................................................................................................................................................
2-127
2.21.6
Light .......................................................................................................................................................
2-127
2.21.7
Electrostatic interference ........................................................................................................................
2-127
2.21.8
Magnetic fields .......................................................................................................................................
2-128
2.21.9
Electromagnetic interference (EMI) ......................................................................................................
2-128
2.22
Relative humidity and external temperature readings ....................................................................................
2-128
3
IEEE-488 Reference
3.1
Introduction ........................................................................................................................................................
3-1
3.2
Connections ........................................................................................................................................................
3-2
3.2.1
IEEE-488 bus connections .........................................................................................................................
3-2
3.2.2
RS-232 serial interface connections ...........................................................................................................
3-3
3.3
GPIB primary address selection .........................................................................................................................
3-3
3.4
GPIB programming language selection .............................................................................................................
3-4
3.5
QuickBASIC 4.5 programming .........................................................................................................................
3-4
3.6
General bus commands ......................................................................................................................................
3-5
3.6.1
REN (remote enable) ..................................................................................................................................
3-5
3.6.2
IFC (interface clear) ...................................................................................................................................
3-5
3.6.3
LLO (local lockout) ...................................................................................................................................
3-6
3.6.4
GTL (go to local) .......................................................................................................................................
3-6
3.6.5
DCL (device clear) .....................................................................................................................................
3-6
3.6.6
SDC (selective device clear) ......................................................................................................................
3-6
3.6.7
GET (group execute trigger) ......................................................................................................................
3-6
3.6.8
SPE, SPD (serial polling) ...........................................................................................................................
3-6
3.7
Front panel aspects of IEEE-488 operation .......................................................................................................
3-7
3.7.1
Error and status messages ..........................................................................................................................
3-7
3.7.2
IEEE-488 status indicators .........................................................................................................................
3-7
3.7.3
LOCAL key ................................................................................................................................................
3-7
3.8
Status structure ...................................................................................................................................................
3-7
3.8.1
Condition registers ...................................................................................................................................
3-14
3.8.2
Transition filters .......................................................................................................................................
3-14
3.8.3
Event registers ..........................................................................................................................................
3-15
