ADVANTEST R3132 Series User Manual

R3132 Series Spectrum Analyzer Operation Manual
4.2.5 Message Exchange Protocol
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(5) Selected Device Clear (SDC)
The SDC message operates in the same manner as the DCL message. However, it is executed only
when the spectrum analyzer is a listener. In other cases, the SDC message is ignored.
(6) Go to Local (GTL)
The GTL message puts the spectrum analyzer into local mode. In local mode, all the operations nor-
mally accessible from the front panel are available.
(7) Local Lockout (LLO)
The LLO message puts the spectrum analyzer in the local lockout mode. If the spectrum analyzer is
set to the remote mode when this is done, all operations normally available from the front panel are
disabled (note that in the normal remote mode, you can perform front panel operations using the
LOCAL
key).
You can use one of the following three methods to set the spectrum analyzer to local mode from the
local lockout mode:
• Send a GTL message to the spectrum analyzer
• Set the REN message to false (the local lockout mode will be canceled)
• Turn the spectrum analyzer power off and on again
4.2.5 Message Exchange Protocol
The spectrum analyzer receives program messages from controllers or other devices through the GPIB bus
and generates response data. Program messages include commands, queries (commands used to query re-
sponse data) and data. The procedure used to exchange these commands, queries and data is explained in
this section.
(1) GPIB Buffers
The spectrum analyzer is equipped with the following two buffers:
(a) Input Buffer
The input buffer is used to store data temporarily for command analysis (it has a length of 1024
bytes so an input larger than this is ignored.)
Use either of the following two methods to clear this buffer:
• Turn the spectrum analyzer power on.
• Execute DCL or SDC.
(b) Output Buffer
The output buffer is used to store data which is going to be read from the controller (1024 bytes).
Use either of the following two methods to clear this buffer:
• Turn the spectrum analyzer power on.
• Execute DCL or SDC.

ADVANTEST R3132 Series Specifications

General

Brand	ADVANTEST
Model	R3132 Series
Category	Measuring Instruments
Language	English