4-1
Chapter 4
GPIB OPERATION
Contents
Introduction ................................................................................................................................. 4-2
GPIB functions ............................................................................................................................ 4-2
Device listening elements ............................................................................................................ 4-3
Device talking elements............................................................................................................... 4-3
Programming ............................................................................................................................... 4-4
Program messages ................................................................................................................ 4-4
Compound headers ............................................................................................................... 4-4
Program data......................................................................................................................... 4-4
Message exchange protocol.................................................................................................. 4-5
Remote/local operation......................................................................................................... 4-5
Common commands and queries (IEEE 488.2) ................................................................... 4-5
Device dependent commands ...................................................................................................... 4-7
Default settings ............................................................................................................................ 4-7
Instrument mode .......................................................................................................................... 4-9
Carrier frequency......................................................................................................................... 4-9
RF level ..................................................................................................................................... 4-10
Modulation mode....................................................................................................................... 4-12
Modulation control .................................................................................................................... 4-12
Digital modulation..................................................................................................................... 4-13
Advanced digital modulation..................................................................................................... 4-21
Vector modulation ..................................................................................................................... 4-26
Frequency modulation ............................................................................................................... 4-28
Phase modulation....................................................................................................................... 4-29
Amplitude modulation ............................................................................................................... 4-30
Wideband FM............................................................................................................................ 4-31
Pulse modulation ....................................................................................................................... 4-32
Modulation frequency ............................................................................................................... 4-33
CTCSS tones edit ...................................................................................................................... 4-34
Sequential tones......................................................................................................................... 4-35
LF control .................................................................................................................................. 4-37
LF generator frequency ............................................................................................................. 4-38
LF generator level...................................................................................................................... 4-39
Memory - store .......................................................................................................................... 4-40
Memory - recall ......................................................................................................................... 4-40
Memory - erase.......................................................................................................................... 4-40
Sweep operation ........................................................................................................................ 4-41
Sweep mode/type....................................................................................................................... 4-44
Sweep control ............................................................................................................................ 4-45
Frequency hopping .................................................................................................................... 4-45
Miscellaneous commands.......................................................................................................... 4-46
The status byte ........................................................................................................................... 4-48
Status data structure - register model......................................................................................... 4-49
Standard event registers............................................................................................................. 4-50
Hardware event registers ........................................................................................................... 4-51
Coupling event registers ............................................................................................................ 4-52
Instrument event registers.......................................................................................................... 4-53
Queue flag details ...................................................................................................................... 4-54
Status byte when read by *stb? ................................................................................................. 4-55
Status byte when read by serial poll .......................................................................................... 4-56
Summary of status reporting commands and queries ................................................................ 4-57
List of tables
Table 4-1 Instrument default settings ....................................................................................................... 4-7