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decimal format (digital input), 42, 133
declaration of conformity, inside rear cover
default delays (channel delays), 89
delay (channel delay), 88
device clear, 302
DIAG:DMM:CYCL:CLEar command, 294
DIAG:DMM:CYCL? command, 294
DIAG:PEEK:SLOT:DATA? command, 265
DIAG:POKE:SLOT:DATA command, 265
DIAG:RELay:CYCL:CLEar command, 294
DIAG:RELay:CYCL? command, 294
dielectric withstand voltage, 335
differential error (DAC), 398
diffusion error, 352
digital channels, external scanning, 97
digital input (HP 34907A)
8-bit vs. 16-bit operations, 133
adding to scan list, 42, 133
binary format, 42, 133
block diagram, 174
card reset, 133, 134
decimal format, 42, 133
scanning, 76
simplified schematic, 392
using alarms, 130
digital output (HP 34907A)
8-bit vs. 16-bit operations, 138
binary format, 43, 138
card reset, 138
decimal format, 43, 138
driving microwave switches, 394
simplified schematic, 393
sink current, 393
TTL drive capability, 393
DIG:DATA:BYTE? command, 255
DIG:DATA:WORD? command, 255
digits
number of, 100
vs. integration time, 103, 203
dimensions
HP 34970A, 413
plug-in modules, 413
DIN/IEC 751, 106
disabling internal DMM, 96
discrete parameters, 300
DISPlay command, 266
display
annunciators, 4
enable/disable, 144
text message, 144
DISPlay:TEXT command, 266
DISPlay:TEXT:CLEar command, 266
dissimilar metals, 340
DMM (internal)
block diagram, 343
field installation kit
See Option 001 Installation Note
enabling/disabling, 145
reading relay count, 147
DTR/DSR flow mode (RS-232), 153
E
echo commands (modem), 274
enable register (status), 275
ERROR annunciator, 4, 142, 304
error messages, 303-318
errors
ac loading, 364
cabling, 339
capacitive coupling, 381
clearing, 142
common mode noise, 353
crest factors, 407
diffusion error, 352
frequency measurements, 377
loading, dc voltage, 357
loading, input bias current, 358
low-level ac, 341
magnetic fields, 340
measurement error, 414
multiplexing and switching, 381
period measurements, 377
reading error queue, 142, 304
RF multiplexing, 391
thermal EMF, 340
thermocouple calculation, 353
thermocouple reference junction, 352
totalizer, 396
event register (status), 275
example programs
C and C++, 328
Excel 7.0, 321
Excel macro example programs, 321
Express Exchange program, 10
EXT annunciator, 4
Ext Trig connector, 5, 83, 95
external DMM
connections, 95
scanning with, 95
external reference (T/C), 107
external scanning
connections, 95
with digital channels, 97
external trigger
connector, 5, 83, 95
scan interval, 80
F
factory reset state, 160
fahrenheit, setting units, 106
fast ac filter, 114, 116, 361
fast timeout, 118
FETCh? command
description, 79, 204, 236
example, 206
filler panel kit (rack mounting), 31
filter, ac signal, 114, 116, 117, 361
firmware revision
HP 34970A, 146
plug-in modules, 146
fixed input range (dc voltage), 113
fixed reference (thermocouple), 107
fixed reference junction, 221
flange kit (rack mounting), 31
floppy disks (BenchLink), 19
flow mode (RS-232)
DTR/DSR mode, 153
factory setting, 47, 153
Modem mode, 154
None (no flow mode), 153
RTS/CTS mode, 153
selecting, 47, 153
XON/XOFF mode, 153
form C (SPDT) switching, 59, 384
format
alarm queue data, 127
scanned readings, 87
Index
Index
424