INSTALLATION AND OPERATION
2-40
Table
2-10.
IEEE-488 Address
Mode
Message Descriptions (cont)
MESSAGE
DESCRIPTION
IFC
Interface
Clear
Talker
The
Generator untalks and unlistens when the IFC message
Operation is received.
Listener
The Generator unlistens and untalks when the IFC message
Operation
is received.
OTA
Other Talk Address
Talker
Operation
The Generator untalks when the OTA message is received.
SPE
Serial Poll Enable
Talker After
receiving
the SPE message, the Generator responds
Operation
with the
serial poll status byte, if addressed to talk.
SPD
Serial Poll Disable
Talker After receiving the SPD message- the Generator resumes
Operation
normal
talk operation.
ULA
Unlisten
Address
Listener
The Generator
unlistens
when the ULA message
is
Operation
received.
RSV
Request Service
Service The front panel SRQ indicator is Lit when the rsv
Operation
message is sent. The Generator may request service
for
several
reasons. Each
reason for service request
can
be individually
masked with the set mask command
("SM"). The service request mask can be interrogated
with
the interrogate mask command
bCL
Device Clear
Clear The DCL message
is
ignored when
in local.
When
the
DCL
Operation message is received (during
remote operation) the
Generator
is cleared. Any characters in the input buffer
are cleared followed by the same operation as
the clear
command
("CL"). The operation of the DCL message is
identical to the operation
of
the
selected
device
clear
(SDC) message. The
cleared
state of
the Generator
is
described
in the
paragraphs on Power-On
Conditions.
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