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Operating and Programming 3
L4400 User’s Guide 55
Specifying Channel Lists and Scan Lists
A command’s channel list (<ch_list>) or scan list (<scan_list>) parameter is
used to specify a single channel, multiple channels, or a range of channels. The
channel and scan lists must be preceded with the "@" symbol and must be
enclosed in parentheses. The following commands demonstrate how the chan-
nel list parameter is used:
ROUT:CLOS (@1010) - close channel 10
ROUT:CLOS (@1010,1012,1015) - close channels 10, 12, and 15
ROUT:CLOS (@1005:1010,1015) - close channels 5-10, and 15
When specifying a range of channels, the first and last channels in the range
must be valid. Any invalid channels within the range are ignored (no error is
generated).
The Analog Bus relays (numbered 911, 912, 913, etc.) on the multiplexer and
matrix modules are ignored if they are included in a range of channels. An error
will be generated if an Analog Bus relay is specified as the first or last channel
in a range of channels.
Refer to “Scanning” later in this chapter for additional information
creating/using a scan list.
L4400 SCPI Command Summary
Table 3- 3 lists the SCPI commands that apply to all L4400 series instruments.
The SCPI commands unique to each instrument are summarized in the
instrument- specific chapters that follow Chapter 3.
For complete information on all commands, refer to the Programmer’s
Reference contained on the L4400 Product Reference CD- ROM.