4 Operating the Power System

Output Groups

 

 

The ability to group outputs is only available on power system mainframes with

NOTE

 

 

firmware revision B.00.00 and up.

 

 

 

 

 

 

 

 

Output channels can be configured or “grouped” to create a single

 

 

output with higher current and power capability. Almost all

 

 

instrument functionality is supported by grouped channels, including

 

 

voltage and current programming, measurements, status, step and

 

 

list transients. The following conditions apply for grouped channels:

 

 

Up to four output channels can be grouped per mainframe.

 

 

Output channels that are grouped must also be connected in

 

 

parallel as described in Chapter 2.

 

 

Grouped channels do not have to be adjacent, but they must have

 

 

identical model numbers and options installed.

 

 

The maximum output current is the sum of the maximum of each

 

 

channel in the group.

 

 

 

 

Low current measurement ranges should not be used with

 

 

grouped channels, otherwise a measurement overload error will

 

 

occur. Low current output ranges, however, can be used.

 

 

Over-current protection delay has a slightly slower response time

 

 

(~10 ms) and slightly less resolution than an ungrouped channel.

 

 

When output channels have been grouped, they are addressed

 

 

using the channel number of the lowest channel in the group.

 

 

Power limiting should not be used when Agilent N673xB, N674xB,

 

 

and N677xA power modules are grouped. Refer to Appendix C.

 

 

 

 

 

 

 

Front Panel:

SCPI Command:

 

 

 

Select System\Groups.

To configure a group of channels:

 

 

In the matrix that appears, select

SYST:GRO:DEF (@2,3,4)

 

 

This groups channels 2 through 4. To

 

 

the channels you want to group.

 

 

Each row defines a separate group.

address the group, use channel 2.

 

 

 

 

 

 

To return grouped channels back to an ungrouped state, first remove

 

 

the parallel connections between channels and proceed as follows:

 

 

 

 

 

 

 

Front Panel:

SCPI Command:

 

 

 

Select System\Groups.

To ungroup all channels:

 

 

In the matrix, place each output

SYST:GRO:DEL:ALL

 

 

 

 

 

 

channel in its own separate group.

 

 

 

 

Reboot the unit for the grouping or ungrouping changes to take effect.

 

 

 

 

 

 

 

Front Panel:

SCPI Command:

 

 

 

Cycle AC power.

SYST:REB

 

62

Series N6700 User’s Guide

Page 61 Page 63
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Agilent Technologies N6700 manual Output Groups, Front Panel Scpi Command Select System\Groups, Systgrodelall, Systreb
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