Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 2: Installation
2601B-PULSE-901-01A April 2020 2-31
Terminator
When receiving data over the GPIB, the instrument terminates messages on any line feed character
or any data byte with EOI asserted (line feed with EOI asserted is also valid). When sending data, it
appends a line feed character to all outgoing messages. The EOI line is asserted with the terminating
line feed character.
Front-panel GPIB operation
This section describes aspects of the front panel that are part of GPIB operation, including messages,
status indicators, and the LOCAL key.
Error and status messages
The front-panel display may show error and status messages (see Displayed error and status
messages (on page 3-13)). See Error summary list (on page 12-2) for a list of status and error
messages that are associated with IEEE-488 programming. The instrument can be programmed to
generate a service request (SRQ), and command queries can be performed to check for specific
error conditions.
Communication status indicators
The remote (REM), talk (TALK), listen (LSTN), and service request (SRQ) indicators show the
communication bus status. Each of these indicators is described below.
GPIB, VXI-11, USB, RS-232
The SRQ applies to all available communication buses, however, actual service requests only apply
to GPIB, USB, and VXI-11 (see Status byte and service request (SRQ) (on page 15-15) for more
information).
REM
This indicator is illuminated when the instrument is in the remote-control state. When the instrument is
in the remote-control state, all front-panel keys, except for the EXIT (LOCAL) key and OUTPUT
ON/OFF control, are locked out. When REM is off, the instrument is in the local-control state and
front-panel operation is restored.
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