Keithley 2790, Reference Manual

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2-6 Model 2790 SourceMeter
®
Switch System Reference Manual
Pseudocards
Using remote programming, you can assign a pseudocard to an empty switching module
slot. With a pseudocard installed, the Model 2790 will operate as if the switching module
is installed in the Model 2790. This feature allows you to exercise open/close/scan opera-
tions, or configure your system without having the actual switching module installed in
the unit. There is a pseudocard for the Model 7702, 7751, 7752, and 7753 switching mod-
ules.
A pseudocard cannot be installed from the front panel. However, once it is installed you
can take the Model 2790 out of remote and use the front panel. Pressing the LOCAL key
takes the Model 2790 out of remote.
When the instrument is turned off, the pseudocard will be lost (uninstalled). Use the fol-
lowing commands to install pseudocards:
SYSTem:PCARd1 <name> ' Install pseudocard in slot 1.
SYSTem:PCARd2 <name> ' Install pseudocard in slot 2.
<name> = C7702, c7751, c7752, or c7753
Programming example
— The following command sets up the Model 2790 to operate as
if a Model 7751 switching module is installed in slot 1, which must be empty. You cannot
assign a pseudocard to a slot that already has a switching module installed in it.
SYSTem:PCAR1 C7751 ' "Install" pseudocard 7751 for slot
1.
Channel assignments
The Model 2790 has two slots for switching modules. To control the appropriate switching
module, the slot number must be included with the switching module channel number when
you specify a system channel. The system channel assignment is formatted as follows:
SCH where: S is the slot number
CH is the channel number
Examples:
101 = Slot 1, Channel 1
210 = Slot 2, Channel 10
For remote operation, the 3-digit channel assignment is included in the channel list
parameter for the commands. Format examples for the channel list parameter are provided
in
Table 2-1 and Table 2-2 .