Keithley 6220

Input trigger requirements ............................................................................. 8-13
Output trigger specifications ......................................................................... 8-14
External trigger example ............................................................................... 8-15
9 Limit Test and Digital I/O
Limit test ................................................................................................................. 9-2
Overview ......................................................................................................... 9-2
Programming limit testing ............................................................................... 9-2
SCPI commands — limit testing ..................................................................... 9-3
Digital I/O port ....................................................................................................... 9-5
Digital I/O connector ....................................................................................... 9-5
+5V output ....................................................................................................... 9-5
SOT line .......................................................................................................... 9-6
Simplified schematic ....................................................................................... 9-6
Sink mode — controlling external devices ..................................................... 9-6
Source mode — logic control .......................................................................... 9-8
Setting digital output lines ............................................................................... 9-8
SCPI commands — force digital I/O pattern .................................................. 9-9
10 Remote Operations
Selecting and configuring an interface ................................................................. 10-2
Interfaces ....................................................................................................... 10-2
Languages ...................................................................................................... 10-3
Interface selection and configuration ............................................................ 10-3
Programming syntax ........................................................................................... 10-12
Command words ......................................................................................... 10-12
Program messages ....................................................................................... 10-15
Response messages ..................................................................................... 10-17
GPIB interface reference .................................................................................... 10-19
GPIB bus standards ..................................................................................... 10-19
GPIB bus connections ................................................................................. 10-19
Primary address ........................................................................................... 10-21
General IEEE-488 bus commands .............................................................. 10-22
Front panel GPIB operation ........................................................................ 10-24
RS-232 interface reference ................................................................................. 10-25
Sending and receiving data .......................................................................... 10-25
RS-232 settings ........................................................................................... 10-25
RS-232 connections ..................................................................................... 10-27
Ethernet interface reference ................................................................................ 10-29
Ethernet standards ....................................................................................... 10-29
Typical Ethernet systems ............................................................................. 10-29
Ethernet connections ................................................................................... 10-31
Ethernet settings .......................................................................................... 10-33
Using the example software ............................................................................... 10-35
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