Performing A Segment-By-Segment Sweep (Segment Sweep); Concept Of The Segment Sweep - Agilent Technologies ENA Series User Manual

Performing a Segment-by-Segment Sweep (Segment Sweep)

This section describes the concept of the segment sweep and how to perform it.

Concept of the Segment Sweep

To perform a segment sweep, you must define two or more frequency ranges called
segments, and then specify the number of points, IF bandwidth, power level, sweep mode,
sweep delay time, and sweep time for each segment. All segments are swept sequentially
as if swept in one sweep operation.
• By skipping the frequency range, which does not need to be measured, you can sweep
and measure only the portions you need.
• You can define the optimum measurement conditions for each of the segments you
designate. For example, you can specify as many points as possible in a segment
requiring high trace resolution and as few points as possible in a segment not requiring
high resolution. This shortens the measurement time, enabling you to enhance the
overall measurement throughput without the entire measurement operation being
drawn into the measurement conditions at a particular frequency range.
To evaluate a bandpass filter having the transmission characteristics shown in Figure 11-7,
for example, you can select the frequency ranges you need from A through G and
determine the measurement conditions shown in the Table . This enables you to measure
them simultaneously in one sweep operation.
Figure 11-7 Characteristics of a DUT on which a Segment Sweep Will be Performed
Table 11-1 Frequency Ranges (Segments) From Figure 11-7 and Their Measurement
Conditions
A
B
C
E
G
Chapter 11
Performing a Segment-by-Segment Sweep (Segment Sweep)
Start Frequency Stop Frequency
440 MHz 915 MHz
915 MHz 980 MHz
980 MHz 1.035 GHz
1.07 GHz 2 GHz
2.6 GHz 3 GHz
Optimizing Measurements
Number of Points IF Bandwidth
50 50 kHz
130 70 kHz
60 50 kHz
100 70 kHz
40 70 kHz
Sweep Mode
Stepped
Fast Stepped
Stepped
Fast Swept
Fast Swept
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