Opening and Closing Channels

34937A, 34938A and 34939A SCPI Programming Examples

The programming examples below provide you with SCPI command examples to use for actions specific to the general purpose switch modules.

The slot and channel addressing scheme used in these examples follow the form sccc where s is the mainframe slot number (1 through 8) and ccc is the channel number.

For complete information on the SCPI commands used to program the 34980A, and for example programs, refer to the Agilent 34980A Programmer’s Reference contained on the 34980A Product Reference CD.

Example: Closing and opening channels The first two commands close channel 3 for a module in slot 2, then channel 5 for that module. The last command opens both channel 3 and channel 5.

ROUTe:CLOSe (@2003)

ROUTe:CLOSe (@2005)

ROUTe:OPEN (@2003,2005)

Example: Querying channels for open or closed state The following command returns a 1 (true) or 0 (false) state of channel 016 for a module in slot 3.

ROUTe:CLOSe (@3016)

ROUTe:CLOSe? (@3016) !Returns a 1

ROUTe:OPEN? (@3016) !Returns a 0

Reading Jumper State and System Identity

Example: Querying the power-failure state of 5 A relays The following command returns the position of the power- fail jumper, either “MAIN” (all relays maintain their present state when power fails) or “OPEN” (all relays open when power fails) for a module in slot 4. If this command is sent to a module other than the 34937A or 34938A, “NONE” is returned (no error is generated). In particular, the position of the power- fail jumper on the 34939A module cannot be queried using this commmand.

SYSTem:MODule:PFAil:JUMPer:AMP5? 4

Example: Querying the system for module identify (all modules) The following command returns the identify of the module installed in slot 7.

SYSTem:CTYPe? 7

4	Agilent 34937A-34939A General Purpose Switch Modules User’s Guide