R&S RTA4000, Руководство пользователя

Страница: 124 / 861

Waveform analysis
R&S
®
RTA4000
124 User Manual 1335.7898.02 ─ 08
The "History" menu has the following settings:
Auto
Defines how the record length and number of segments are set: automatically by the
instrument, or by setting the record length or number of segments manually.
In automatic mode, you can adjust the record length in the "Acquisition" menu. Auto-
matic setting of the number of segments takes effect only if auto trigger is set. When
you change from auto to normal trigger mode, the current segment size remains.
Remote command:
ACQuire:MEMory[:MODE]
on page 503
Record Length
Shows or sets the record length, depending on the selected "Auto" mode. Record
length is the number of waveform samples that are stored in one waveform record. The
number of available history segments is adjusted automatically.
Remote command:
ACQuire:POINts:AUTomatic
on page 454
ACQuire:POINts[:VALue]
on page 455
No. of Segments
Shows or sets the number of history segments in the memory, depending on the
selected "Auto" mode. The record length is adjusted accordingly. When you change the
number of segments, the history is deleted.
See also: Chapter 7.4.1, "Segmented memory" , on page 121
Remote command:
ACQuire:COUNt
on page 504
Fast Segmentation
If enabled, the acquisitions are performed as fast as possible, without processing and
displaying the waveforms. When acquisition has been stopped, the data is processed
and the latest waveform is displayed. Older waveforms are stored in segments. You
can display and analyze the segments using the history.
Fast segmentation takes effect for [Single] acquisitions if "Nx Single" > 1.
See also: Chapter 7.4.1, "Segmented memory" , on page 121
Remote command:
ACQuire:SEGMented:STATe
on page 505
Show History
Enables or disables the history.
7.4.4 Segment table and history player
The memory segments are continuously written when an acquisition is running. When
you activate the history, the segment table opens but it is empty when the acquisition is
running. When you stop the acquisition, the captured segments are listed in the seg-
ment table, and the history player becomes active.
History and segmented memory