HP 34401A, User Manual

Page: 233 / 236

ranging
autoranging, 20, 61
front-panel keys, 20
overload, 61, 142
selecting, 20
ratio (dcv:dcv) measurements
connections, 44
front panel, 44
math functions allowed, 63, 124
selecting, 45
READ?
, 114, 130
reading hold
beeper control, 88
description, 43, 82
front-panel, 43
sensitivity band, 43, 82
reading memory
functions allowed, 46, 84
number of readings stored, 84
retrieving readings, 46
storing readings, 46
readings, number of, 77
rear panel
input terminals, 5
pictorial overview, 5
rear terminals
query setting, 58, 123
selecting, 58
reciprocal counting technique, 213
register diagram (status), 135
regulatory requirements, 237
relative value (dB), 40, 67
relative measurements
description, 38, 65
front panel, 38
functions allowed, 63, 124
Null Register, 38, 66
null test lead resistance, 38, 65, 204
remote interface
HP-IB connector, 5
HP-IB selection, 92, 162
language restrictions, 92, 94
RS-232 connector, 5, 150
RS-232 selection, 92, 162
replacing fuses, 100
reset state, 101
resistance
2-wire
connections, 17
math functions allowed, 63, 124
ranges, 17
4-wire
connections, 17
math functions allowed, 63, 124
ranges, 17
resistance, input, 53
resolution
front-panel keys, 21
“half” digit, 21, 54
power line cycles, 54
setting, 21
vs. autozero, 59
vs. integration time, 54
retrieving stored readings, 46
revision query (firmware), 89
ROUTe:TERMinals?
, 58, 123
RS-232 interface
baud rate selection, 93, 148, 163
cables recommended, 150
commands, 153
connector location, 5, 150
connector pinout, 150
data format, 159
handshake protocol (DTR/DSR), 151
parity selection, 93, 164
pass/fail outputs, 70, 150
pin definitions, 150
selecting interface, 92, 162
TALK ONLY mode, 91, 160
rubber bumpers, removing, 23
S
SAMPle:COUNt
, 77, 131
samples, number of, 77
SCPI
command summary, 105-111
compliance information, 168
data types, 158
language introduction, 154
status model, 134
syntax conventions, 50, 105, 155
version query, 90, 133
security code (calibration)
changing, 98
factory setting, 95
rules, 95
string length, 95
self-heating errors, 210
self-test
complete test, 13, 86
errors, 179
reading memory, 84, 86
power-on test, 13, 86
sensitivity, 226
sensitivity band (reading hold), 43, 82
serial interface (RS-232)
baud rate selection, 93, 148, 163
cables recommended, 95, 150
commands, 153
connector location, 5, 150
connector pinout, 150
data format, 159
handshake protocol (DTR/DSR), 151
parity selection, 93, 164
pass/fail outputs, 70, 150
pin definitions, 150
selecting interface, 92, 162
TALK ONLY mode, 91, 160
serial poll, 137
service request (SRQ), 69, 137
settling
delays, 204
trigger, 79
signal filter, 51, 214
single trigger, 42, 73
sliding-shelf kit, 24
slow ac filter, 51, 214
software (bus) triggering, 75, 127
specifications, 215
standard event register
bit definitions, 140
clearing, 141
status byte
bit definitions, 136
clearing, 136
summary register, 136
Ind
e
x
Index
235