Agilent Technologies ENA Series Betriebsanweisung Seite 418

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Seitenansicht 417
412 Chapter 12
Optimizing Measurements
Improving Measurement Throughput
Improving Measurement Throughput
This section explains the following three methods to improve the measurement throughput.
“Using Fast Sweep Modes” on page 412
“Turning off the updating of information displayed on the LCD screen” on page 416
“Turning off system error correction” on page 416
Using Fast Sweep Modes
The E5070B/E5071B provides four sweep modes: “Stepped mode” and “swept mode,” and
their accelerated versions “fast stepped mode” and “fast swept mode.” You can shorten
sweep time as shown in Table 12-1 by using the swept mode or its fast modes.
NOTE If it is not necessary to shorten the sweep time, use the stepped mode (preset
configuration).
Table 12-1 Sweep time criteria (each measurement point interval)
Measurement
point interval
Shorter (faster sweep) Longer (slower sweep)
2 MHz or less
Swept
Fast swept
Fast stepped Stepped
2 MHz to 5 MHz Fast swept Swept Fast stepped Stepped
5 MHz to 8 MHz Fast swept
Swept
Fast stepped
Stepped
8 MHz to 10 MHz Fast swept Fast stepped
Stepped
Swept
10 MHz to 30 MHz Fast swept Fast stepped Stepped Swept
30 MHz to 50 MHz
Fast swept
Fast stepped
Stepped Swept
50 MHz to 70 MHz Fast stepped
Fast swept
Stepped
Swept
70 MHz or more Fast stepped Stepped Fast swept Swept
Table 12-2 Characteristics of sweep mode
Stepped Swept Fast stepped Fast swept
Measurement
reliability
High Relatively low Relatively low Low
Sweep time Long
(Except when the
measurement point
interval is
approximately 10
MHz or more)
Short
(Only when the
measurement point
interval is
approximately 10
MHz or less)
Short
(Shortest when the
measurement point
interval is
approximately 30
MHz or more)
Short
(Shortest when the
measurement point
interval is
approximately 30
MHz or less)
Restrictions
on
measurement
No particular
restriction
DUTs with long
electrical delay
cannot be measured
correctly
No particular
restriction
DUTs with long
electrical delay
cannot be measured
correctly
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