CMU  Contents of Chapter 5 
1100.4903.12 I-5.1  E-8 
Contents 
5 Remote Control – Basics..................................................................................... 5.1 
Introduction.......................................................................................................................................5.1 
Operation via Remote Control ........................................................................................................5.2 
Switchover to Remote Control .................................................................................................5.2 
Setting the Device Address ...........................................................................................5.2 
Indications during Remote Control ................................................................................5.3 
Return to Manual Operation ..........................................................................................5.4 
Setting the Transmission Parameters (RS-232 interface).............................................5.5 
GPIB Bus Messages.........................................................................................................................5.5 
Interface Message....................................................................................................................5.6 
Device Messages (Commands and Device Responses) ........................................................5.6 
Structure and Syntax of Device Messages....................................................................................5.7 
SCPI Introduction.....................................................................................................................5.7 
Command Structure.................................................................................................................5.7 
Structure of a Command Line..................................................................................................5.9 
Responses to Queries .......................................................................................................... 5.10 
Parameters............................................................................................................................ 5.10 
Overview of Syntax Elements............................................................................................... 5.12 
Instrument Model and Command Processing............................................................................ 5.13 
Input Unit............................................................................................................................... 5.13 
Command Recognition ......................................................................................................... 5.14 
Data Set and Instrument Hardware ...................................................................................... 5.14 
Status Reporting System ...................................................................................................... 5.14 
Output Unit............................................................................................................................ 5.14 
Command Sequence and Command Synchronization......................................................... 5.15 
Status Reporting System.............................................................................................................. 5.16 
Structure of an SCPI Status Register ................................................................................... 5.16 
Overview of the Status Registers.......................................................................................... 5.18 
Status Byte (STB) and Service Request Enable Register (SRE)......................................... 5.20 
IST Flag and Parallel Poll Enable Register (PPE)...................................................... 5.21 
Event Status Register (ESR) and Event Status Enable Register (ESE).................... 5.21 
STATus:OPERation Register ..................................................................................... 5.22 
STATus:QUEStionable-Register ................................................................................ 5.23 
Application of the Status Reporting Systems........................................................................ 5.24 
Service Request.......................................................................................................... 5.24 
Symbolic Status Event Register Evaluation ............................................................... 5.25 
Serial Poll.................................................................................................................... 5.25