Keithley 708B Reference Manual page 15

Table of Contents
How do I know if an error has occurred on my instrument? ................................................ 9-2
How do I find the serial number and firmware version of the instrument?........................... 9-3
Next steps.................................................................................................................. 10-1
Additional Models 707B and 708B information.................................................................. 10-1
Maintenance ................................................................................................................A-1
Upgrading firmware.............................................................................................................. A-1
Check fan status .................................................................................................................. A-2
Fuse replacement ................................................................................................................ A-2
Using Models 707A and 708A compatibility mode ..................................................B-1
Model A to Model B differences ...........................................................................................B-1
Front-panel relay closure indicators ..........................................................................................B-1
Timing issues ............................................................................................................................B-2
Digital interface .........................................................................................................................B-2
Memory setups..........................................................................................................................B-2
Models 707A and 708A commands .....................................................................................B-3
Status model ...............................................................................................................C-1
Overview ..............................................................................................................................C-1
Status Byte register...................................................................................................................C-2
Status model diagrams ........................................................................................................C-3
Status Byte register overview....................................................................................................C-4
Measurement summary bit (Measurement event register) ........................................................C-5
System summary bit (System register) .....................................................................................C-5
Error available bit (Error or Event queue)..................................................................................C-7
Questionable summary bit (Questionable event register) .........................................................C-7
Message available bit (Output queue).......................................................................................C-8
Event summary bit (ESB register) .............................................................................................C-9
Master summary status bit (MSS bit register) .........................................................................C-10
Operation summary bit (Operation event register) ..................................................................C-11
Status function summary....................................................................................................C-12
Clearing registers and queues ...........................................................................................C-13
Startup state.......................................................................................................................C-13
Programming and reading registers...................................................................................C-13
Programming enable and transition registers..........................................................................C-13
Reading registers ....................................................................................................................C-14
Register programming example ..............................................................................................C-15
Status byte and service request (SRQ) .............................................................................C-15
Service request enable register...............................................................................................C-15
Status byte register .................................................................................................................C-16
Serial polling and SRQ ............................................................................................................C-17
SPE, SPD (serial polling) ........................................................................................................C-18
Service requests (SRQs) and connections .............................................................................C-18
x
Models 707B and 708B Switching Matrix Reference Manual
707B-901-01 Rev. A / August 2010