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ACJTDEF
Active Function Definition
Refer to the following table for a description of the different unit parameter.
Behavior of Unit Parameters for ACTDEF Command
Parameter
INT
STEP
NONE
HZ
ABSHZ
SEC
DB
DBM
V
Step
Increment Value
Integer, increment or
decrement by 1 only
Increment or decrement by
1 only
Not applicable
Resolution bandwidth
during zero-span mode;
otherwise, 10% of span.
1.5, 2,
3, 5,
7.5
1.5, 2,
3, 5,
7.5
dB per division
dB per division
1.5, 2,
3,
5,
7.5
Knob
Increment Value
1
.
1
Not applicable
Resolution bandwidth,
during zero-span mode;
otherwise, 0.05% of span.
1%
1%
1% of dB per division
1% of dB per division
1%
unit-Keys
None
None
None
Frequency
Frequency, in absolute Hz
Time
Relative amplitude
Absolute amplitude
Volts
Some of the unit parameters specify the units of the function value (Hz, seconds,
dB,
dBm,
V).
The STEP, INT, and NONE parameters are
unitless
values. The STEP unit parameter works
the same as
the
INT unit parameter. When using the INT, STEP, and NONE parameters in
an ACTDEF declaration, the value displayed on spectrum analyzer display for the ACTDEF
function value is rounded to the nearest integer; however the actual value in spectrum
analyzer memory is not rounded.
Use the following guidelines when defining ACTDEF:
n
The function name used in the ACTDEF declaration must be unique. Do not use an existing
Table
5-2 for a list of
reserved words.
n Limit the number of characters (between the delimiters) in the list of spectrum analyzer
commands to a maximum of 2047 characters.
Query Response
There are two ways to query the ACTDEF command. Querying the ACTDEF function’s name
returns the value of the ACTDEF function. For example, if the ACTDEF function’s name is
TEST, executing
OUTPUT
718;"TEST
?
;
‘I
returns the value of ACTDEF function TEST in the
following format:
5-52
Programming Commands