Agilent Technologies Signal Analyzer N9030a - Manual (Page 1457)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
View/Display
Note that since the spectrogram is intended to give a view of spectral behavior versus time, the
Periodic Trigger, which generates triggers at known intervals, will give the most predictable and
consistent starting times for the traces. Other triggers, like Free Run or External Triggers, may
give non-linear or less predictable times. Similarly, turning Auto Align off will improve the
regularity of the trace starting times.
While in Spectrogram View, all functions and settings work as normal, except as noted below.
•
The Single key behaves differently than it does in Normal View. In the Spectrogram View, the
Single key causes a specified number of traces to be read into the spectrogram from Trace 1,
after which the acquisition stops. The number of traces to be read into the spectrogram is
controlled with the “Average/Hold Number” key in the Meas Setup menu. For example, if you
set the “Average/Hold Number” to 5, then every time you press Single, it will take 5 sweeps and
put the 5 traces one by one into the Spectrogram; then it will stop sweeping. Note that you can
set the “Average/Hold Number” to 1 to capture a single trace into the Spectrogram when the
Single key is pressed, making the behavior similar to that of the Normal View
•
In the Spectrogram View, Sweep Points are limited to a maximum of 1001 due to memory
concerns. On entry to this View, if the number of points is greater than 1001, it is forced to
1001; therefore if the user had a larger number of points on entry to Spectrogram, all the traces
from the Normal View will be cleared out.
•
In the Spectrogram View, if Trace 1 is saved, exported or queried, the data that gets saved or
returned is the data from the Display Trace in the spectrogram. All SCPI trace saves or queries
for the other 5 traces return their data normally.
•
Copy Trace is available in Spectrogram. If Trace 1 is the “from” trace, Copy Trace will copy the
Display Trace to any other trace; remember that the Display Trace is one of up to 300 historical
versions of Trace 1. So if the Display Trace is 150, then the 150th version of Trace 1 will get
copied to the destination trace. Since the historical trace data is immutable, copying a trace to
Trace 1 is not possible. The same is true for Exchange Trace; Trace 1 is not available to
exchange
•
Selecting or moving a marker which is turned on but not on the current Display Trace will NOT
move the marker to the current Display Trace; it will select it, and/or move it, but it will stay on
the Trace it is currently on.
•
Turning on a marker which is turned off will turn it on in the center of the current Display
Trace.
•
When a Peak Search is performed, if the selected marker is turned on but is not on the current
Display Trace, it is first moved to the center of the current Display Trace before performing the
search.
•
If Couple Markers is On, then moving a marker to a new Display Trace will cause all the
coupled markers to move by the same number of traces.
Remote Language Compatibility Measurement Application Reference 1457