In this appendix:
NOTE Visit the Keithley Instruments website at 
www.keithley.com for more information on 
Frequently Asked Questions.
Topic Page
How do I optimize performance? ..................................................... A-2
Setting speed ................................................................................  A-2
Disabling auto zero to increase speed ..........................................  A-2
How do I use the Digital I/O port? ....................................................  A-3
Digital I/O port terminals................................................................  A-3
Controlling the digital I/O port........................................................  A-3
How do I trigger other instruments?................................................  A-3
Triggering a scanner......................................................................  A-3
Programming triggering.................................................................  A-4
How do I generate a service request? .............................................  A-4
Setting up a service request..........................................................  A-4
Service request programming example.........................................  A-4
Polling for SRQs............................................................................  A-5
How do I store measurements in nonvolatile memory? ................ A-5
Front panel operation .................................................................... A-5
Remote programming.................................................................... A-5
How do I stack channels to output higher voltage?.......................  A-6
How do I parallel channels to output higher current?.................... A-7
How do I make contact check measurements? .............................. A-8
Contact check connections............................................................ A-8
Model 2601A/2602A/2611A/2612A contact check connections .... A-8
How do I make low-current measurements?................................... A-9
Low-current connections ............................................................... A-9
Low-current measurement programming example........................ A-10
Appendix A 
Frequently Asked Questions