7-6 Automating Measurements
Displaying Measurement Results
Customized X-axis Annotation
Customized X-axis Annotation
X-axis annotation consists of one or two lines of information that appear
below the graticule. You can replace this annotation with your own text
(see Figure 7-1) or eliminate the X-axis annotation completely.
By default, the X-axis annotation displays the stimulus frequencies
(default resolution is kHz), or powers if in power sweep. However, it can
be customized using SCPI commands to show your own start and stop
X-axis values and units. For example, when measuring mixers which
introduce a frequency offset, you can annotate the frequencies at the
output of the mixer.
To turn on user-defined X-axis annotation
To turn on user-defined X-axis annotation, use the command:
DISP:ANN:FREQ[1|2]:USER[:STATe] {OFF|0|ON|1}
For example:
DISP:ANN:FREQ1:USER ON
To specify your start and stop values
To specify your start and stop values, use:
DISP:ANN:FREQ[1|2]:USER:STARt <num>
DISP:ANN:FREQ[1|2]:USER:STOP <num>
The value <num> must be between −10,000 and 10, 000. For example:
DISP:ANN:FREQ1:USER:STAR -100
DISP:ANN:FREQ1:USER:STOP +100
To specify a custom suffix
To specify a custom suffix, use:
DISP:ANN:FREQ[1|2]:USER:SUFF[:DATA]
For example:
DISP:ANN:FREQ1:USER:SUFF 'uV'
The suffix can be up to 3 characters long.
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