Pseudocards; Channel Assignments - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual

Pseudocards

Using remote programming, you can assign a pseudocard to an empty switching module
slot. With a pseudocard installed, the Model 2750 will operate as if the switching module
is installed in the Model 2750. This feature allows you 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 every Keithley Model 77XX series switching module.
A pseudocard cannot be installed from the front panel. However, once it is installed, you
can take the Model 2750 out of remote and use the front panel. Pressing the LOCAL key
takes the Model 2750 out of remote.
When a pseudocard is installed, the appropriate front panel slot indicator lamp turns on.
When the instrument is turned off, the pseudocard will be lost (uninstalled). Use the fol-
lowing commands to install pseudocards:
SYSTem:PCARd1 <name>
SYSTem:PCARd2 <name>
SYSTem:PCARd3 <name>
SYSTem:PCARd4 <name>
SYSTem:PCARd5 <name>
<name> = C7700, C7701, C7702, C7703, C7705, C7706, C7707, C7708 or C7709
Programming example — The following command sets up the Model 2750 to operate as
if a Model 7700 switching module is installed in slot 2, which must be empty. You cannot
assign a pseudocard to a slot that already has a switching module installed in it.
SYSTem:PCAR2 C7700

Channel assignments

The Model 2750 has five 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 channel. The channel assignment is formatted as follows:
SCH where:
Examples:
101 = Slot 1, Channel 1
210 = Slot 2, Channel 10
506 = Slot 5, Channel 6
NOTE
S is the slot number
CH is the channel number
For remote operation, the 3-digit channel assignment is included in the channel
list parameter for the commands. Format examples for the channel list parame-
ter are provided in Table 2-1
Close/Open Switching Module Channels
' Install pseudocard in slot 1.
' Install pseudocard in slot 2.
' Install pseudocard in slot 3.
' Install pseudocard in slot 4.
' Install pseudocard in slot 5.
' "Install" pseudocard 7700 for slot 2.
and Table 2-2.
2-5