Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
439 User Manual 1411.1055.32 ─ 10
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Generally, the "generator function" should be set to "Sine Burst"; it is, however,
also possible to use other signals from the internal generator to perform single
measurements.
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The "Low Level" of the burst signal must be set to 0.0 (V or FS), especially for con-
tinuous measurements, so that the burst pause can arm the trigger for the next
measurement. The voltage must be greater than 0.0, otherwise the message "No
Generator Signal" will be displayed and it will not be possible to trigger the mea-
surement.
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"Burst on Delay" is normally not necessary. It can be used to lengthen the standard
generator mute time (3 ms) at the start of the measurement.
The following settings depend on the length of the expected delay and apply to the
generator function "Sine Burst".
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The "recording length" (Trace Length) should be around 110% of the maximum
expected delay, but at least 10 ms. Reducing the recording time increases the
update rate with continuous measurements and the time resolution of the graphical
display.
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The "frequency" of the burst signal should be selected such that the period of the
signal is approximately 2% to 10% of the recording time. If possible, it should be a
subharmonic of the generator sampling frequency.
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The "burst duration" should not exceed 10% of the recording time, and it should be
set to an integer multiple of the period (1 to 5 cycles) so that the test signal will not
have a DC component.
The following two examples show configurations for very short (1 ms) and very long
(1 s) delays:
Delay DUT 1 ms Delay DUT 1 s
Analysis in the Time Domain