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Sweep/Control
Zoom Points
In the Trace Zoom View of the Swept SA measurement, the Points key changes to Zoom Points
whenever the focus (thick green border) is on the bottom window. Zoom Points controls how many
points are displayed in the Zoom Window and hence indirectly controls the Zoom Span.
Couplings: • When Source Mode is set to Tracking, and Stepped Tracking is used (as
with option ESC), 201 source steps are used to achieve optimal speed.
The number of sweep points in the analyzer is then set to match the
number of steps in the source. When Source Mode is set to Off, the
previous number of points (the value that existed when Source Mode was
Off previously) is restored, even if the user has changed the Points value
while the Source Mode was set to Tracking.
• Whenever the number of sweep points change:
— All trace data is erased
— Any traces with Update Off will also go to Display Off (like going
from View to Blank in the older analyzers)
— Sweep time is re-quantized
— Any limit lines that are on will be updated
— If averaging/hold is on, averaging/hold starts over
Preset: 1001
State Saved: Saved in instrument state
Min: Normally the minimum is 1, but in Tracking Source Mode, the minimum
value of Points is 101. If you go into Tracking Source Mode with fewer points
than 101, it sets Points to 101.
Max: 40001 when not in Tracking Source mode
In Tracking Source mode:
• in Stepped Tracking (e.g., External Source), 1601 or the maximum
number of points supported by the source, whichever is less
• in Swept Tracking (e.g., Tracking Generator), 10000
Backwards Compatibility Notes: 1. In ESA and PSA, Sweep Points was adjustable with the knob and step
keys. This caused the sweep time to increase whenever Points was
adjusted (either up or down), due to excessive application of the
quantization rules. In the X-Series the value of Sweep Points must be
entered manually, which avoids this anomaly
2. In ESA the preset value of Sweep Points is 401, in PSA it is 601. In
X-Series it is 1001.
Initial S/W Revision: Prior to A.02.00
Modified at S/W Revision: A.11.00
Key Path:
Sweep/Control