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Command Reference 9-119
*DMCPM6680B/81/85
8 <Macro label> , <Program messages>
Define Macro
Allows you to assign a sequence of one or more program message units to a
macro label. The sequence is executed when the macro label is received as a
command or query. Twenty five macros can be defined at the same time, and each
macro can contain an average of 40 characters.
If a macro has the same name as a command, it masks out the real command with
the same name when macros are enabled. If macros are disabled, the original
command will be executed.
If you define macros when macro execution is disabled, the counter executes the
*DMC command fast, but if macros are enabled, the execution time for this com
-
mand is longer.
Parameters:
<Macro label> = 1 to 12-character macro label. (String data must be surrounded by“”or‘‘
as in the example below.)
<Program messages> = the commands to be executed when the macro label is received, both
block data and string data formats can be used.
Example 1:
SEND® *DMC ‘AMPLITUDE?’,":FUNC 8 ‘FREQ 8 1’;:INP:HYST:AUTO ONCE
8 ;:INP:HYST?;:INP:LEV?"
This example defines a macro called amplitude?.
SEND® AMPLITUDE?
The macro makes an AUTO ONCE and reads out the hysteresis and trigger level
that auto selects. (Macros must be enabled; otherwise, the :AMPLITUDE? query
will not execute, see *EMC)).
READ¬ +3.46125461E-001;+3.64852399E-001
Auto selects 33% of Vpp as hysteresis, so multiplying the first part of this reading
by 3 will give you the signal amplitude (0.346*3=1.04 V in this example). You can
also calculate positive peak voltage:
Hysteresis
Trigger Level
*3
2
+
and negative
peak voltage: Vp
Hysteresis
Trigger Level
*3
2
-
Example 2:
SEND® *DMC 8 ‘AUTOFILT’,":INP:HYST:AUTO 8 $1;:INP:FILT 8 $1
This example defines a macro AUTO which takes one argument, i.e., auto
«ON|OFF|ONCE» ($1) .
SEND® AUTOFILT 8 OFF
Turns off both the auto function and the filter.
Complies to standards: IEEE 488.2 1987.