Keysight Technologies E4360 Series User Manual

Also see for E4360 Series: Service guide Service guide

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Grouping/Compatibility Appendix DSeries E4360 User’s Guide 111Front Panel: SCPI Command:SelectSystem\Groups\Parallel.Select either Direct or Auto.To specify auto-parallel:SYST:GRO:PAR AUTO,(@1)To specify direct-parallel:SYST:GRO:PAR DIR,(@1)When grouped channels are wired by direct-parallel, each channel isprogrammed to control its own output current with its internal circuitry.There is no requirement to designate any master or follower channel.Commands sent to the grouped channel will normally be applied to bothchannels by the firmware automatically. Commands that control theoutput current will be divided by ½ and applied to both channels.NOTE If you are grouping outputs, in direct parallel, in Fixed mode, you mustset the over-current protection of each output to its maximum setting.Otherwise the over-current protection will shut the outputs down. Thisoccurs because output currents are not shared equally when outputsare grouped in Fixed mode.Ste p 3. Note that this step is not required with direct-paralleled outputs.If the grouped outputs are connected in auto-parallel, specify whichmainframe has the master output, and which mainframe has the followeroutputs.Front Panel: SCPI Command:SelectSystem\Groups\Programming.Select Internal to specify themainframe with the masteroutput.Select External to specify themainframe with followeroutputs.To specify the mainframe thatcontains with the master output:CURR:MODE:PROG INT,(@1)To specify the mainframe with thefollower outputs:CURR:MODE:PROG EXT,(@1)ToNOTE This command can only be programmed when the instrument isoperating in Fixed mode. An error will be generated if this command issent when the instrument is operating in SAS or in Table mode.When grouped channels are auto-paralleled, the firmware willautomatically designate channel 1 as the master channel and channel 2as a follower. The automatic designation is required since there is noprogramming access to channel 2 once the channels are grouped.When channels on two mainframes are grouped and auto-paralleled,one channel on one of the mainframes must be programmed as a masterwith the above commands while all other channels must be programmedas followers.To program the output current of the auto-paralleled grouped channels,the master group must be programmed with 1/nth of the desiredcurrent, where n is the number of groups paralleled. The follower groupswill generate the same current as signaled by the master group.