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5-15.
Extra Space or Tab Characters ......................................................... 5-9
5-16.
Terminators....................................................................................... 5-9
5-17.
Incoming Character Processing ........................................................ 5-10
5-18.
Response Message Syntax ................................................................ 5-10
5-19.
Input Buffer Operation .......................................................................... 5-10
5-20.
Using Commands .................................................................................. 5-12
5-21.
Multiple Commands ......................................................................... 5-13
5-22.
Sequential and Overlapped Commands ............................................ 5-13
5-23.
Switch to be Enabled ....................................................................... 5-13
5-24.
Long-Term Commands..................................................................... 5-13
5-25.
Checking 5790A Status ........................................................................ 5-14
5-26.
Serial Poll Status Byte (STB) ........................................................... 5-14
5-27.
Service Request Line (SRQ) ........................................................ 5-14
5-28.
Service Request Enable Register (SRE) ....................................... 5-14
5-29.
Programming the STB and SRE .................................................. 5-15
5-30.
Event Status Register (ESR) ............................................................. 5-17
5-31.
Event Status Enable Register (ESE) ............................................ 5-17
5-32.
Bit assignments for the ESR and ESE .......................................... 5-17
5-33.
Programming the ESR and ESE ................................................... 5-17
5-34.
Instrument Status Register (ISR) ...................................................... 5-19
5-35.
Instrument Status Change Registers ............................................. 5-19
5-36.
Instrument Status Change Enable Registers ................................. 5-19
5-37.
Bit Assignments for the ISR, ISCR, and ISCE ............................ 5-19
5-38.
Programming the ISR, ISCR, and ISCE ...................................... 5-20
5-39.
Output Queue ................................................................................... 5-20
5-40.
Error Queue ...................................................................................... 5-20
5-41.
IEEE-488 Interface Configuration ........................................................ 5-21
5-42.
Bus Communication Overview ............................................................. 5-22
5-43.
Device-Dependent Commands ......................................................... 5-22
5-44.
Common Commands ........................................................................ 5-22
5-45.
Interface Messages ........................................................................... 5-22
5-46.
Definition: Queries and Commands ................................................. 5-23
5-47.
Functional Elements of Commands .................................................. 5-23
5-48.
Interface Messages ........................................................................... 5-23
5-49.
Remote Program Examples ................................................................... 5-23
5-50.
Writing an SRQ and Error Handler .................................................. 5-24
5-51.
Taking a Measurement ..................................................................... 5-24
5-52.
Efficiently Taking N Successive Readings ...................................... 5-25
5-53.
Locking the 5790A Range ................................................................ 5-25
5-54.
Calibrating the 5790A Remotely ...................................................... 5-25
5-55.
The IEEE-488 Connector ...................................................................... 5-27
6
Remote Commands ............................................................................. 6-1
6-1.
Introduction ........................................................................................... 6-3
6-2.
Alphabetical List of IEEE-488.2 Common Commands ........................ 6-7
6-3.
Alphabetical List of 5790A Device-Dependent Commands ................. 6-13
7
Using the RS-232 Interface ................................................................. 7-1
7-1.
Introduction ........................................................................................... 7-3
7-2.
Serial Interface Specifications .............................................................. 7-3
7-3.
Setting Up and Connecting the Serial Interface .................................... 7-4
7-4.
Printing Calibration Reports ................................................................. 7-5
7-5.
Sample Measurement Shifts Report ................................................. 7-6
iii
(continued)
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