Keithley 2303, User Manual

Page: 9 / 152

5 Relay Control
Overview ........................................................................................... 5-2
Connections ....................................................................................... 5-4
Controlling the relay .......................................................................... 5-5
SCPI programming ........................................................................ 5-5
6 GPIB Operation
Introduction ....................................................................................... 6-2
GPIB bus connections ....................................................................... 6-2
Primary address ................................................................................. 6-3
Output format .................................................................................... 6-3
General bus commands ..................................................................... 6-4
REN (remote enable) ..................................................................... 6-4
IFC (interface clear) ....................................................................... 6-4
LLO (local lockout) ....................................................................... 6-5
GTL (go to local) ........................................................................... 6-5
DCL (device clear) ........................................................................ 6-5
SDC (selective device clear) .......................................................... 6-5
GET (group executive trigger) ....................................................... 6-5
SPE, SPD (serial polling) .............................................................. 6-5
Front panel aspects of GPIB operation ............................................. 6-6
Remote indicator and LOCAL key ................................................ 6-6
Error and status messages .............................................................. 6-6
Programming syntax ......................................................................... 6-7
Command words ............................................................................ 6-7
Program messages ....................................................................... 6-10
Response messages ...................................................................... 6-12
Message exchange protocol ......................................................... 6-12
7 Status Structure
Overview ........................................................................................... 7-2
Status byte and SRQ ...................................................................... 7-2
Status register sets .......................................................................... 7-2
Queues ........................................................................................... 7-2
Clearing registers and queues ............................................................ 7-4
Programming and reading registers ................................................... 7-5
Programming enable registers ....................................................... 7-5
Reading registers ........................................................................... 7-5
Status byte and service request (SRQ) .............................................. 7-6
Status byte register ......................................................................... 7-7
Service request enable register ...................................................... 7-7
Serial polling and SRQ .................................................................. 7-8
Status byte and service request commands .................................... 7-9