Keithley 6220 Reference Manual page 19

9 Limit Test and Digital I/O
Figure 9-1 Limit 1 test (compliance) ....................................................................................
Figure 9-2 Digital I/O port ...................................................................................................
Figure 9-3 Digital I/O port simplified schematic .................................................................
Figure 9-4 Controlling externally powered relays ................................................................
Figure 9-5 NAND gate control .............................................................................................
10 Remote Operations
Figure 10-1 IEEE-488 connector ........................................................................................
Figure 10-2 Multi-unit connections ....................................................................................
Figure 10-3 IEEE-488, Ethernet (6221 only), and RS-232 connector locations ................
Figure 10-4 RS-232 interface connector ............................................................................
Figure 10-5 Direct 6221 connection to PC .........................................................................
Figure 10-6 Small LAN system using a hub ......................................................................
Figure 10-7 Isolated LAN system using two NICs (Network Interface Cards) ................
Figure 10-8 Enterprise-wide or internet network system ...................................................
Figure 10-9 RJ-45 Ethernet cable (male/male) ..................................................................
Figure 10-10 Model 6221 Ethernet connector ......................................................................
Figure 10-11 Example software typical main screen ...........................................................
Figure 10-12 Typical instrument connection setup wizard ..................................................
Figure 10-13 Typical virtual front panel ...............................................................................
11 Status Structure
Figure 11-1 Model 622x status mode structure ....................................................................
Figure 11-2 16-bit status register ..........................................................................................
Figure 11-3 Status byte and service request .........................................................................
Figure 11-4 Standard event status .......................................................................................
Figure 11-5 Operation event status .....................................................................................
Figure 11-6 Measurement event status ...............................................................................
Figure 11-7 Questionable event status ................................................................................
13 DISPlay, FORMat, and SYSTem Key-Press Codes
Figure 13-1 ASCII data format .............................................................................................
Figure 13-2 IEEE-754 data formats .....................................................................................
Figure 13-3 Model 6220 key-press codes ...........................................................................
Figure 13-4 Model 6221 key-press codes ...........................................................................
16 Performance Verification
Figure 16-1 Connections for DC current output accuracy (200nA to 100mA ranges) ........
Figure 16-2 Connections for DC current output accuracy (2nA and 20nA ranges) .............
Figure 16-3 Connections for compliance accuracy ..............................................................
Figure 16-4 Connections for waveform function amplitude flatness ...................................
Figure 16-5 Connections for waveform function frequency accuracy ...............................
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