180– 181

S(continued)

Setting (continued) resolution, 15, 38, 198

2-wire ohms, 92, 107, 143 4-wire ohms, 90, 105, 135 ac current, 87, 102, 121 ac voltage, 93, 108, 146 dc current, 88, 103, 126 dc voltage, 94, 109, 151 dc voltage ratio, 95, 110 frequency, 89, 104 period function, 91, 106

sample count, 51, 114 trigger

count, 49, 156

delays, 49– 50, 157– 159 upper/lower limits, 44, 77

Settling Time

ac signal filters, 37, 127– 128 automatic insertion, 31

dc blocking circuitry, 36 delays, 31

effects, 31 SICL, 15

Signal Filters, 36– 37, 127– 128 querying, 128

setting, 127

Soft Front Panel (VXIplug&play) See online help

Specifications, 171– 184

ac characteristics, 174– 176 calculate total measurement error, dc characteristics, 171– 173 frequency characteristics, 177– 178 general, 179

high accuracy measurements, 184 interpreting, 182– 183

period characteristics, 177– 178 Speed and Accuracy Tradeoffs, 193– 198 *SRE, 60, 165

*SRE?, 165

SRQ (Service Request Bit), 60 Standard Commands for Programmable

Instruments, 67 Standard Event

bit (ESB), 61 register, 60

Standard Instrument Control Language, 15 Status Byte

message available bit (MAV), 60, 62 operation status bit (OPR), 58

Status Byte (continued)

questionable data register bit (QUE), 63 register, 60

STATus Subsystem, 153– 154

STATus:PRESet, 153 STATus:QUEStionable:CONDition?, 153 STATus:QUEStionable:ENABle, 153 STATus:QUEStionable:ENABle?, 154 STATus:QUEStionable[:EVENt]?, 154

Status System, 58, 60– 63 examples, 60– 63 multimeter, 60– 63 switch module, 58

*STB?, 166 Storing

dB reference value, 43

dBm reference resistance value, 43 NULL offset value, 42

Summary Bit, 60

Switch Module, 58

synchronizing multimeter with, 57– 59, 64 Synchronizing with Switch Module, 57– 59, 64 SYSTem Subsystem, 155

SYSTem:ERRor?, 155 SYSTem:VERSion?, 155

T

Temperature Coefficient accuracy, 183 errors, 34, 180

power dissipation effects, 31 Terminals, input, 18

Thermal EMF Errors, 25 Thermoelectric Voltages, 25– 26 Transfer

accuracy, 183

readings to output buffer, 98, 113 *TRG, 46, 48, 160

Trigger Count, 48– 49, 156– 157 querying, 49, 157 selecting, 48– 49, 156

Trigger Delay, 49– 51, 157– 159 defaults, 50, 159 querying, 51, 158– 159 selecting, 49– 50, 157– 159

Trigger Lines (TTLTrg0-TTLTrg7),46, 111– 112, 160

Trigger Source, 46– 48, 160– 161 BUS, 46, 48, 160 EXTernal, 46– 47, 160

210 Index