HP 54501A - Commands; Device Clear; Group Execute Trigger; (Get)

Bus
Commands
The
following
commands
are
IEEE
488.1 bus
commands
(ATN
true).
IEEE 488.2 defines
many
of
the
actions
which
are
taken
when
these
commands
are
received
by
the
instrument.
Device
Clear
The
device
clear
(DCL)
or
selected device
clear
(SDC)
commands
clear
the
input
and
output
buffers,
reset
the
parser,
and
clear
any
pending
commands.
GrOUp
Execute
The
group
execute
trigger
(GET)
command arms
the trigger which
is
the
Trigger
(GET)
same
action
produced
by
sending
the
RUN
command.
Interface Clear
The
interface
clear
(IFC)
command
halts
all
bus
activity.
This
includes
(IFC)
unaddressing all
listeners
and
the
talker,
disabling
serial
poll
on
all
devices,
and
returning
control
to
the
system
controller.
Status
Annunciators
The
HP
54501A
will
display
the
HP-IB status
on
the
CRT.
The
message
will
indicate
whether
the
instrument
is
in
the
remote mode,
whether
talk
or
listen
is
addressed,
and whether
the
instrument
has
requested
service.
When
the
instrument
is
in
the
local
mode
only
the
SRQ
annunciator
may
be
displayed.
HP
54501A
Programming
Interface Functions
2-3