26 34980A User’s Guide
2 Features and Functions
User-Defined Channel Labels
You can assign user- defined labels to any channel, including Analog Bus
channels on the multiplexer and matrix modules. User- defined channel
labels are available for identification purposes only and cannot be used in
place of a channel number within a command string.
• When shipped from the factory, each channel is assigned a unique
factory- default label (cannot be overwritten). From the front panel,
the factory- default labels are shown on the upper line of the display
(e.g., “MUX CH BANK 1”, “MATRIX1 ROW3 COL4”, “DIO BYTE 1”, etc.).
From the Web Interface, the factory- default labels are displayed as the
channel number (e.g., “1001”, “3020”, etc.).
• If desired, you can assign the same user- defined label to multiple
channels within the same module or on different modules (i.e., channel
labels are not required to be unique).
• You can specify a label with up to 18 characters. You can use letters
(A- Z), numbers (0- 9), and the underscore character. If you specify a
label with more than the allowed 18 characters, it will be truncated
(no error is generated).
• From the Web Interface, a limited number of characters can be
displayed due to space constraints in the browser window. If the
user- defined label it too long to be displayed properly, it will be
truncated (no error is generated).
• The instrument keeps a record of what module types are installed in
each slot. If a different module type is detected in a specific slot at
power on, all user- defined channel labels for that slot are discarded.
If an empty slot is detected at power- on, any previously- defined labels
for that slot are preserved and will be restored if the same module type
is installed later; however, if a module of a different type is installed
in that slot, the previously- defined labels will be discarded.
• All user- defined channel labels are stored in non- volatile memory,
and do not change when power has been off, after a Factory Reset
(
*RST command), after an Instrument Preset (SYSTem:PRESet
command), or after a stored state is recalled (*RCL command).
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