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Channel Assignments; Multiple Channel Operation - Keithley 7711 User Manual

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The Model 7711/7712 modules cannot be included in scanlists.
Detailed information to close and open switching module channels is provided in Section 2 of the Model 27xx User's Manual.
The following summarizes basic operation and provides operating information specific to the Model 7711/7712.

Channel assignments

Measurement functions cannot be assigned to Model 7711/7712 modules. For example, if a
Model 7711/7712 is installed in slot 1 and the SENSE:FUNC 'VOLT:AC', (@101) command is
sent, a -221, "Settings Conflict" error would be reported.
The Model 2700/2701 has two slots for switching modules, and the Model 2750 has five slots. To control the appropriate
switching module, the slot number must be included with the switching module channel number when you specify a channel.
The channel assignment is formatted as follows:
where: S is the slot number
101 = Slot 1, Channel 1
210 = Slot 2, Channel 10
506 = Slot 5, Channel 6 (Model 2750)
For remote operation, the 3-digit channel assignment is included in the channel list parameter for
the commands.
Close/Open channels

Multiple channel operation

Multiple channel operation should only be performed by experienced test engineers who
recognize the dangers associated with multiple channel closures.
For the Model 7711/7712, multiple channel operation provides control of one or two Model 7711/7712 modules in a
Model 2700/2701 (or up to 5 in a Model 2750). OUT A automatically switches as appropriate for channels 1 – 4, and OUT B
automatically switches as appropriate for channels 5 – 8 for each module. When you close two channels in a single module
(one for OUT A and one for OUT B), the appropriate channels will close channels outside of the banks (or on other modules)
are not affected by channel closures.
The following paragraphs summarize multiple channel operation for the front panel and from the remote interface (bus).
Front panel
• For the Models 2700/2701 and 2750, the MULTI option of the CLOSE key can be used to close a channel.
• For the Models 2700/2701 and 2750, the ALL option of the OPEN key closes channels 1 and 5 to OUT A and OUT
B respectively.
CH is the channel number


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